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Northampton Cutlery SWPPP.v2 (2022 CGP) Stormwater Pollution Prevention Plan (SWPPP) For Construction Activities At: Former Cutlery 360 Riverside Drive Northampton, MA 01060 SWPPP Operator: Former Cutlery 360 Riverside Drive Northampton, MA 01060 SWPPP Prepared By: OHI Engineering, Inc. 110 Pulpit Hill Road Amherst, MA 01002 413-835-0780 LWitten@OHIEngineering.com SWPPP Preparation Date: 9/21/2022, revised January 2024 Estimated Project Dates: Project Start Date: 01/01/2024 Project Completion Date: 10/01/2024 Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 Northampton, MA Table of Contents SECTION 1: CONTACT INFORMATION/RESPONSIBLE PARTIES ........................................................ 1 1.1 Operator(s) / Subcontractor(s) ...................................................................................................... 1 1.2 Stormwater Team ......................................................................................................................... 2 SECTION 2: SITE EVALUATION, ASSESSMENT, AND PLANNING ...................................................... 3 2.1 Project/Site Information ............................................................................................................... 3 2.2 Discharge Information .................................................................................................................. 3 2.3 Nature of the Construction Activity ............................................................................................. 5 2.4 Sequence and Estimated Dates of Construction Activities ........................................................... 6 2.5 Allowable Non-Stormwater Discharges ....................................................................................... 6 2.6 Site Maps ...................................................................................................................................... 7 SECTION 3: DOCUMENTATION OF COMPLIANCE WITH OTHER FEDERAL REQUIREMENTS ....... 8 3.1 Endangered Species Protection ..................................................................................................... 8 3.2 Historic Preservation .................................................................................................................. 11 3.3 Safe Drinking Water Act Underground Injection Control Requirements .................................. 11 SECTION 4: EROSION AND SEDIMENT CONTROLS .......................................................................... 13 4.1 Natural Buffers or Equivalent Sediment Controls ...................................................................... 14 4.2 Perimeter Controls ...................................................................................................................... 14 A4.4 Stockpiled Sediment or Soil ....................................................................................................... 19 4.5 Minimize Dust ............................................................................................................................ 19 4.6 Minimize the Disturbance of Steep Slopes ................................................................................. 20 4.7 Topsoil ........................................................................................................................................ 20 4.8 Soil Compaction ......................................................................................................................... 21 4.9 Storm Drain Inlets ...................................................................................................................... 21 4.10 Constructed Stormwater Conveyance Channels ......................................................................... 21 4.11 Sediment Basins ......................................................................................................................... 21 4.12 Chemical Treatment ................................................................................................................... 22 4.13 Dewatering Practices .................................................................................................................. 22 4.14 Other Stormwater Controls ......................................................................................................... 22 4.15 Site Stabilization ......................................................................................................................... 22 SECTION 5: POLLUTION PREVENTION STANDARDS ......................................................................... 25 5.1 Potential Sources of Pollution .................................................................................................... 25 5.2 Spill Prevention and Response ................................................................................................... 26 5.3 Fueling and Maintenance of Equipment or Vehicles .................................................................. 28 5.4 Washing of Equipment and Vehicles ......................................................................................... 28 5.5 Storage, Handling, and Disposal of Construction Products, Materials, and Wastes .................. 29 5.6 Washing of Applicators and Containers used for Paint, Concrete or Other Materials ............... 33 5.7 Fertilizers .................................................................................................................................... 33 5.8 Other Pollution Prevention Practices .......................................................................................... 33 SECTION 6: INSPECTION AND CORRECTIVE ACTION ..................................................................... 34 6.1 Inspection Personnel and Procedures ......................................................................................... 34 6.2 Corrective Action ....................................................................................................................... 35 6.3 Delegation of Authority .............................................................................................................. 35 SECTION 7: TRAINING ............................................................................................................................ 36 SECTION 8: CERTIFICATION AND NOTIFICATION ............................................................................ 37 Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 Northampton, MA SWPPP APPENDICES ............................................................................................................................... 38 Appendix A – Site Maps Appendix B – Copy of 2022 CGP Appendix C – NOI and EPA Authorization Email Appendix D – Inspection Form Appendix E – Corrective Action Form Appendix F – SWPPP Amendment Log Appendix G – Subcontractor Certifications/Agreements Appendix H – Grading and Stabilization Activities Log Appendix I – SWPPP Training Log Appendix J – Delegation of Authority Appendix K – Endangered Species Documentation Appendix L – Historic Preservation Documentation Appendix M – Impaired Waters Documentation Appendix N – Order of Conditions Appendix O – Stormwater Management Report Appendix P – Blastox Information & MSDS Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 1 Northampton, MA SECTION 1: CONTACT INFORMATION/RESPONSIBLE PARTIES 1.1 Operator(s) / Subcontractor(s) Operator: Owner (Control of Plans and Specs) Field Office: Cutlery Building Associates o/c Alan Verson, Partner 90 Conz Street Northampton, MA 01060 413-586-1348 (O) 360 Riverside Drive Northampton, MA Cutlery Building Associates and their authorized representatives have operational control over the construction plans and specifications including the ability to make modifications to the those plans and specifications. Cutlery Building Associates is responsible for compliance with EPA's CGP per Section 01570, Temporary Controls. Cutlery Building Associates has day-to-day operational control of those activities at the project that are necessary to ensure compliance with the permit conditions. See Appendix A for Site Maps. Operator: Contractor (Control of day-to-day) Emergency 24-Hour Contacts: Cutlery Building Associates Cutlery Building Associates o/c Alan Verson, Partner Alan Verson, Partner 90 Conz Street Northampton, MA 01060 413-695-9431 (C) Art Pichette, Partner 413-626-1008 (C) Subcontractor(s): OHI Engineering, Inc. Task: Design Engineering, Project Licensed Site Professional (LSP) Services 110 Pulpit Hill Road Amherst, MA 01002 Duffy-Willard Task: initial clearing; build construction entrance. 157 Florence Road Florence, MA C.D. Davenport Task: General Contractor responsible for tree clearing & removal, log-mats, retaining wall restoration, re-grading, stockpile construction, final grading. 130 Colrain Street Greenfield, MA 01301 Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 2 Northampton, MA 1.2 Stormwater Team and Responsibilities Project Manager Project/Site Superintendent Cutlery Building Associates Cutlery Building Associates Alan Verson Art Pichette 413-695-9431 (C) 413-626-1008 (C) Project LSP OHI Engineering, Inc. Lyons Witten, LSP 413-262-4009 (c) Art Pichette, Project Superintendent, is responsible for day-to-day operational control of CGP compliance including: design, installation, maintenance, and/or repair of stormwater controls; application and storage of treatment chemicals; inspections; and corrective actions. Lyons Witten, LSP, will assist with CGP compliance including: design, installation, maintenance, and/or repair of stormwater controls; application and storage of treatment chemicals; inspections; and corrective actions. Construction operators must post a sign or other notice of permit coverage at a safe, publicly accessible location in close proximity to the construction site. This notice must also include information informing the public on how to contact EPA to obtain a copy of the SWPPP, and how to contact EPA if stormwater pollution is observed in the discharge. Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 3 Northampton, MA SECTION 2: SITE EVALUATION, ASSESSMENT, AND PLANNING 2.1 Project/Site Information Project Name and Address Project/Site Name: Headrace Levee Retaining Wall Restoration Project Street/Location: 360 Riverside Drive City: Northampton State: Massachusetts ZIP Code: 01060 County or Similar Subdivision: Hampshire Project Latitude/Longitude Latitude: Longitude: 1. 42.321611 º N (decimal) 1. -72.666417 0 W (decimal) Method for determining latitude/longitude: USGS topographic map (specify scale: ) EPA Web site GPS Other (please specify): Google Earth Horizontal Reference Datum: NAD 27 NAD 83 or WGS 84 Unknown Additional Project Information Is the project/site located on Indian country lands, or located on a property of religious or cultural significance to an Indian tribe? Yes No Are you applying for permit coverage as a “federal operator” as defined in Appendix A of the 2022 CGP? Yes No Note: Some template language has been incorporated in this SWPPP as a quick reference for on-site personnel that may not be familiar with the 2022 CGP. The 2022 CGP is attached as Appendix B. 2.2 Discharge Information Does your project/site discharge stormwater into a Municipal Separate Storm Sewer System (MS4)? Yes No Are there any surface waters that are located within 50 feet of your construction disturbances? Yes No Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 4 Northampton, MA Table 1 – Names of Receiving Waters Name(s) of the first surface water that receives stormwater directly from the site and/or from the MS4 1. Mill River Table 2 – Impaired Waters / TMDLs Is this surface water listed as “impaired”? What pollutant(s) are causing the impairment? Has a TMDL been completed? Title of the TMDL document Pollutant(s) for which there is a TMDL 1. YES NO Escherichia Coli (E. coli) YES NO N/A N/A Describe the method(s) used to determine whether or not the project/site discharges to an impaired water: Online EPA records were reviewed via the following URL link (https://mywaterway.epa.gov/) Please see the attached documentation in Appendix M. Table 3 – Tier 2, 2.5, or 3 Waters Is this surface water designated as a Tier 2, Tier 2.5, or Tier 3 water? (see Appendix F) If answered yes, specify which Tier (2, 2.5, or 3) the surface water is designated as? 1. YES NO Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 5 Northampton, MA 2.3 Nature of the Construction Activity General Description of Project The plans and specifications detail reconstruction of 380 linear feet of dry-laid stone retaining wall originally built in the 1860s, construction of an additional 105 feet of retaining wall at the downstream end of the existing wall, and repair of mortared stone wall. The retaining wall supports a levee which was part of the headrace supplying water power to the Northampton Cutlery. Water power was utilized at the mill until approximately the 1920s, and the headrace was slowly filled with trash and industrial waste until the building was sold to the current owners circa 1986. Heavy metals (primarily chromium III, nickel, lead, arsenic, antimony) are among the industrial wastes found in the filled portions of the headrace and metals are also found on the surface of the levee bank above the Mill River down to the top of the stone retaining wall. Investigation of the nature and extent of metals at this Site are detailed in numerous submittals to the Massachusetts DEP under Release Tracking Number (RTN #1-13320). A Phase IV Remedy Implementation Plan (RIP; OHI 2/8/22) was the most recent submittal to MassDEP. It details the history of the Site, the degraded condition of the levee retaining wall, and outlines steps to repair and refurbish the retaining wall, re-grading of the levee to reduce its slope, and placement of excavated impacted-soil in an existing on-site soil stockpile of increased length. A corresponding MassDEP Notice of Intent (NOI) was filed with the Northampton Conservation Commission to gain their approval for the project. The Commission approved the project and issued a corresponding Order of Conditions dated 1/23/2023. Site work includes building a construction/access road entrance off Riverside Drive, clearing and grubbing, and tree removal prior to retaining wall reconstruction, regrading of the levee slope, and placement of excavated soil in the on-site stockpile. Reconstruction of the relieved- slope of the levee bank includes armored embankment in areas below the 100-year flood elevation, and turf mat installation above the 100-year flood elevation to the top of the levee. See Appendix A for Site Maps. Size of Construction Project SIZE OF PROPERTY ESTIMATED: 3.3 acres TOTAL AREA OF CONSTRUCTION DISTURBANCES ESTIMATED: 1.41 acres Permanent Disturbance = 42,448 SF Temporary Disturbance = 17,647 SF MAXIMUM AREA TO BE DISTURBED AT ANY ONE TIME ESTIMATED 1.41 acres A Disturbance Plan is provided as sheet C9.1 in the Riverbank Remediation plan set (OHI, 3/3/22) showing the various areas and types of disturbance (Appendix A). Type of Construction Site (check all that apply): ☐ Single-Family Residential ☐ Multi-Family Residential ☐ Commercial ☒ Industrial ☐ Institutional ☐ Highway or Road ☐ Utility ☒ Other Retaining Wall Repair Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 6 Northampton, MA Will there be demolition of any structure built or renovated before January 1, 1980? ☐ Yes ☒ No If yes, do any of the structures being demolished have at least 10,000 square feet of floor space? ☐ Yes ☐ No ☒ N/A Was the pre-development land use used for agriculture? ☐ Yes ☒ No 2.4 Sequence and Estimated Dates of Construction Activities Regular working hours are considered as 8 hours per day, Monday through Friday, excluding federal and state holidays, between the hours of 7:00 AM and 4:00 PM. Work at other times, including nights and weekends, shall be at the option of the Engineer or Owner. The project is expected to commence on or about January 1, 2024 and will be completed by October 1, 2024. A schedule of construction activities are as follows:  Construction Entrance installation, initial grubbing: January 2024  Selective Tree Clearing: January/February 2024  Retaining Wall repairs & construction, re-grading levee slope, stockpile excavated soils, cover stockpile, fence installation: May/June/July 2024  Final sitework, landscaping: August/September 2024  Substantial Completion: September 2024 2.5 Allowable Non-Stormwater Discharges List of Allowable Non-Stormwater Discharges Present at the Site Type of Allowable Non-Stormwater Discharge Likely to be Present at Your Site? Discharges from emergency fire-fighting activities YES NO Fire hydrant flushing YES NO Landscape irrigation YES NO Waters used to wash vehicles and equipment YES NO Water used to control dust YES NO Potable water including uncontaminated water line flushing YES NO Routine external building wash down YES NO Pavement wash waters YES NO Uncontaminated air conditioning or compressor condensate YES NO Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 7 Northampton, MA Uncontaminated, non-turbid discharges of ground water or spring water YES NO Foundation or footing drains YES NO Construction dewatering water YES NO New to the 2022 CGP is an explicit prohibition of non-stormwater discharges of external building wash down waters containing hazardous substances, such as paint or caulk containing polychlorinated biphenyls (PCBs). 2.6 Site Maps Site Map and Contract Drawings are attached as Appendix A. Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 8 Northampton, MA SECTION 3: DOCUMENTATION OF COMPLIANCE WITH OTHER FEDERAL REQUIREMENTS 3.1 Endangered Species Protection Eligibility Criterion Under which criterion listed in Appendix D are you eligible for coverage under this permit? A B C D E F For reference purposes, the eligibility criteria listed in Appendix D are as follows: Criterion A. No ESA-listed species and/or designated critical habitat present in action area. Using process outlined in Appendix D of the CGP, you certify that ESA-listed species designated critical habitat(s) under the jurisdiction of the USFWS or NMFS are not like occur in your site’s “action area” as defined in Appendix A of the CGP. Please N NMFS’ jurisdiction includes ESA-listed marine and estuarine species that spawn in in rivers. Criterion B. Eligibility requirements met by another operator under the 2022 CGP. The construc site’s discharges and discharge-related activities were already addressed in ano operator’s valid certification of eligibility for your “action area” under eligibility Crite A, C, D, E, or F of the 2022 CGP and you have confirmed that no additional ESA-l species and/or designated critical habitat under the jurisdiction of USFWS and/or N not considered in the that certification may be present or located in the “action ar To certify your eligibility under this criterion, there must be no lapse of NPDES pe coverage in the other CGP operator’s certification. By certifying eligibility under criterion, you agree to comply with any conditions upon which the other CGP opera certification was based. You must include in your NOI the NPDES ID from the other CGP operator’s notification of authorization under this permit and list any measures you must comply with. If your certification is based on another 2022 CGP opera certification under criterion C, you must provide EPA with the relevant suppo information required of existing dischargers in Criterion C. Criterion C. Discharges not likely to result in any short- or long-term adverse effects to ESA-l species and/or designated critical habitat. ESA-listed species and/or designated cr habitat(s) under the jurisdiction of the USFWS and/or NMFS are likely to occur in or your site’s “action area,” and you certify to EPA that your site’s discharges and discha related activities are not likely to result in any short- or long-term adverse effects to listed threatened or endangered species and/or designated critical habitat. certification may include consideration of any stormwater controls and/or managem practices you will adopt to ensure that your discharges and discharge-related activ are not likely to result in any short- or long-term adverse effects to ESA-listed species an designated critical habitat. To certify your eligibility under this criterion, indicate 1) the listed species and/or designated habitat located in your “action area” using the pro outlined in Appendix D of this permit; 2) the distance between the site and the l species and/or designated critical habitat in the action area (in miles); and 3) a ratio describing specifically how short- or long-term adverse effects to ESA-listed species w avoided from the discharges and discharge-related activities. (Note: You must inclu copy of your site map from your SWPPP showing the upland and in-water extent of “action area” with your NOI.) Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 9 Northampton, MA Criterion D. Coordination with USFWS and/or NMFS has successfully concluded. Coordination between you and the USFWS and/or NMFS has concluded. The coordination must have addressed the effects of your site’s discharges and discharge-related activities on ESA- listed species and/or designated critical habitat under the jurisdiction of USFWS and/or NMFS, and resulted in a written confirmation from USFWS and/or NMFS that the effects of your site’s discharges and discharge-related activities are not likely to result in any short- or long-term adverse effects. By certifying eligibility under this criterion, you agree to comply with any conditions you must meet for your site’s discharges and discharge- related activities to not likely result in any short- or long-term adverse effects. You must include copies of the correspondence with the participating agencies in your SWPPP and this NOI. Criterion E. ESA Section 7 consultation has successfully concluded. Consultation between a Federal agency and the USFWS and/or NMFS under section 7 of the ESA has concluded. Consultations can be either formal or informal, and would have occurred only as a result of a separate Federal action (e.g., during application for an individual wastewater discharge permit or the issuance of a wetlands dredge and fill permit), and the consultation must have addressed the effects of your construction activity’s discharges and discharge-related activities on all ESA-listed threatened or endangered species and all designated critical habitat under the jurisdiction of each Service, as appropriate, in your action area. The result of this consultation must be either: i. A biological opinion currently in effect that determined that the action in question (taking into account the effects of your facility’s discharges and discharge-related activities) is likely to adversely affect, but is not likely to jeopardize the continued existence of listed species or result in the destruction or adverse modification of critical habitat. The biological opinion must have included the effects of your facility’s discharges and discharge-related activities on all the listed species and designated critical habitat in your action area under the jurisdiction of each Service, as appropriate. To be eligible under (i), any reasonable and prudent measures specified in the incidental take statement must be implemented; ii. Written concurrence (e.g., letter of concurrence) from the applicable Service(s) with a determination that your facility’s discharges and discharge-related activities are not likely to adversely affect ESA-listed species and/or designated critical habitat. The concurrence letter must have included the effects of your facility’s discharges and discharge- related activities on all the ESA-listed species and/or designated critical habitat on your species list(s) acquired from USFWS and/or NMFS as part of this worksheet. The consultation does not warrant re-initiation under 50 CFR §402.16; or, if re-initiation of consultation is required (e.g., due to a new species listing, critical habitat designation, or new information), the Federal action agency has reinitiated the consultation and the result of the consultation is consistent with the statements above. (Note: you must include any re-initiation documentation from the Services or consulting Federal agency with your NOI.) Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 10 Northampton, MA Criterion F. Issuance of section 10 permit. Potential take is authorized through the issuance of a permit under section 10 of the ESA by the USFWS and/or NMFS, and this authorization addresses the effects of the site’s discharges and discharge-related activities on ESA-listed species and designated critical habitat. You must include copies of the correspondence between yourself and the participating agencies in your SWPPP and your NOI. Supporting Documentation For criterion C, Check the applicable source of information that was relied upon: Specific communication with staff of the U.S. Fish & Wildlife Service or National Marine Fisheries Service. Publicly available species list. Based on information obtained from the Natural Heritage and Endangered Species Program (NHESP) Database of Massachusetts and the Information, Planning, and Conservation (IPaC) online system report, the proposed project is partially located within the following mapped national heritage areas: Priority Habitat of Rare Species (PH 2084) and Estimated Habitat of Rare Wildlife. The MassDEP NOI was submitted to the Massachusetts Natural Heritage program for their detailed review which is in progress. A figure depicting the data layer is attached in Appendix K. (http://maps.massgis.state.ma.us/PRI_EST_HAB/viewer.htm )  Nearest Priority habitat (PH): PH 2084  Distance to Nearest PH: 0.0 miles (PH 2084) Both the NMFS and USFWS lists of ESA-listed species and designated critical habitat areas were reviewed for this project. In addition, this project has been reviewed and has been determined that is “May Effect” the northern long-eared bat. The other species listed for the project area is the Monarch Butterfly. The IPaC letter and Species List from USFW are included in Appendix K. https://ipac.ecosphere.fws.gov/ No time of year restrictions are required for the project at this time. The proposed project will not adversely impact Areas of Critical Environmental Concern, or Essential Fish Habitats. The NOAA Marine Fisheries Report for the Site is included in Appendix K. https://noaa.maps.arcgis.com/apps/webappviewer/index.html?id=1bc332edc5204 e03b250ac11f9914a27 Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 11 Northampton, MA 3.2 Historic Preservation Appendix E, Step 1 Do you plan on installing any of the following stormwater controls at your site? Check all that apply below, and proceed to Appendix E, Step 2. Dike Berm Catch Basin Pond Stormwater Conveyance Channel (e.g., ditch, trench, perimeter drain, swale, etc.) Culvert Other type of ground-disturbing stormwater control: See Project Plans for other ground-disturbing SW controls Appendix E, Step 2 If you answered yes in Step 1, have prior surveys or evaluations conducted on the Site already determined that historic properties do not exist, or that prior disturbances at the Site have precluded the existence of historic properties? YES NO Of the 15 properties listed on the National Register of Historic Properties, none are located in the Bay State village of Northampton near the Site. Refer to Appendix L for a list of the nearest National Historic Register properties. (https://www.nps.gov/subjects/nationalregister/database-research.htm#table ) The “Former Firehouse” or “Bay State Engine House” located at 340 Riverside Drive and the Northampton Cutlery mill building at 320 Riverside Drive are both listed on the Massachusetts Cultural Resource Information System (MACRIS; https://mhc-macris.net/#!/ ) web site. The proposed project will not impact either of those buildings. Refer to Appendix L for information listed at the MACRIS web site. Appendix E, Step 3 If you answered no in Step 2, have you determined that your installation of subsurface earth- disturbing stormwater controls will have no effect on historic properties? YES NO 3.3 Safe Drinking Water Act Underground Injection Control Requirements Do you plan to install any of the following controls? YES NO Check all that apply below. Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 12 Northampton, MA Infiltration trenches (if stormwater is directed to any bored, drilled, driven shaft or dug hole that is deeper than its widest surface dimension, or has a subsurface fluid distribution system) Commercially manufactured pre-cast or pre-built proprietary subsurface detention vaults, chambers, or other devices designed to capture and infiltrate stormwater flow. Drywells, seepage pits, or improved sinkholes (if stormwater is directed to any bored, drilled, driven shaft or dug hole that is deeper than its widest surface dimension, or has a subsurface fluid distribution system) Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 13 Northampton, MA SECTION 4: EROSION AND SEDIMENT CONTROLS Operators must design, install and maintain effective erosion controls and sediment controls to minimize the discharge of pollutants. At a minimum, such controls must be designed, installed and maintained to: a. Control stormwater volume and velocity to minimize soil erosion in order to minimize pollutant discharges; b. Control stormwater discharges, including both peak flowrates and total stormwater volume, to minimize channel and streambank erosion and scour in the immediate vicinity of discharge points; c. Minimize the amount of soil exposed during construction activity; d. Minimize the disturbance of steep slopes; e. Minimize sediment discharges from the site. The design, installation and maintenance of erosion and sediment controls must address factors such as the amount, frequency, intensity and duration of precipitation, the nature of resulting stormwater discharge, and soil characteristics, including the range of soil particle sizes expected to be present on the site; f. Provide and maintain natural buffers around waters of the United States, direct stormwater to vegetated areas and maximize stormwater infiltration to reduce pollutant discharges, unless infeasible; g. Minimize soil compaction. Minimizing soil compaction is not required where the intended function of a specific area of the site dictates that it be compacted; and h. Unless infeasible, preserve topsoil. Preserving topsoil is not required where the intended function of a specific area of the site dictates that the topsoil be disturbed or removed. i. The Erosion and Sediment Controls shall also be in compliance with City of Northampton's Order of Conditions, and Contract Document requirements. Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 14 Northampton, MA 4.1 Natural Buffers or Equivalent Sediment Controls Buffer Compliance Alternatives Are there any surface waters within 50 feet of your project’s earth disturbances? YES NO (Note: If no, no further documentation is required for the SWPPP Template.) I will provide and maintain a 50-foot undisturbed natural buffer. I will provide and maintain an undisturbed natural buffer that is less than 50 feet and is supplemented by additional erosion and sediment controls, which in combination achieves the sediment load reduction equivalent to a 50-foot undisturbed natural buffer. It is infeasible to provide and maintain an undisturbed natural buffer of any size; therefore, I will implement erosion and sediment controls that achieve the sediment load reduction equivalent to a 50-foot undisturbed natural buffer. I qualify for one of the exceptions in Part 2.1.2.1.e. (If you have checked this box, provide information on the applicable buffer exception that applies, below.) Buffer Exceptions Which of the following exceptions to the buffer requirements applies to your site? There is no discharge of stormwater to the surface water that is located 50 feet from my construction disturbances. No natural buffer exists due to preexisting development disturbances that occurred prior to the initiation of planning for this project. For a “linear project” (defined in Appendix A), site constraints (e.g., limited right-of-way) make it infeasible for me to meet any of the CGP Part 2.1.2.1.a compliance alternatives. The project qualifies as “small residential lot” construction (defined in Part 2.1.2.1.e.iv and in Appendix A). Buffer disturbances are authorized under a CWA Section 404 permit. Buffer disturbances will occur for the construction of a water-dependent structure or water access area (e.g., pier, boat ramp, and trail). • Reconstruction of a retaining wall first built in the 1860’s and designed to keep the Mill River from eroding the headrace levee. 4.2 Perimeter Controls General • Erosion and sedimentation perimeter control measures will be used during construction to avoid and minimize impacts. Construction Areas will be protected by straw wattles, Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 15 Northampton, MA erosion control blankets, silt fencing, silt sacs in the catch basins, and/or other appropriate measures as needed by the Contractor’s means and methods of construction. The location of erosion controls around the perimeter of the construction site are shown on sheets C7.1 through C7.4 of the Riverbank Remediation plan set (OHI, 12/19/22). • These measures will be installed before construction activity starts and will be inspected, maintained, and repaired, as needed and after 0.25” of precipitation, during the construction period. The integrity of the erosion control measures will be periodically checked and after each rainfall event and repaired, as needed. Accumulated silts and debris will be periodically removed and disposed of off-site. Specific Perimeter Controls Perimeter Control # 1 Perimeter Control Description – Silt Sock / Straw Wattles & Turbidity Curtain  A silt sock/straw wattle will be installed along the length of the Mill River shoreline to prevent sedimentation while wall repair and soil excavation work is being conducted A turbidity curtain will be installed along the east side of the Mill River, outside the silt sock, prior to any wall repair or soil excavation activities along the levee to prevent sedimentation of the Mill River. In most locations work will be conducted from the Bank Full Bench/shoreline which borders the retaining wall, with two exceptions: At the far northern extent of the dry-laid stone wall the shoreline is quite narrow, and some machinery may need to be located partially within the river, on log-mats, for short periods of time.  At the far southern extent of the dry-laid stone wall the shoreline is also quite narrow, and any machinery needed to move stone along the shoreline will access the shoreline from the flood plain further to the south. This area will require log-mats and a turbidity curtain from the flood plain access point to a location where the shoreline is wide enough for the full width of machinery when such work is in progress.  Silt socks/straw wattles will be maintained in effective condition throughout the construction period. A stockpile of extra wattles will be kept on-Site throughout the construction work. This material will be installed at the direction of the Engineer or Owner to mitigate any erosion or sedimentation conditions which may arise. Installation  Fill material for the wattles shall be straw.  Tubes for wattles shall have an effective height of 12 inches, a maximum of 18” in diameter, and shall be prefabricated commercial product. Additional tubes may be used at the direction of the Engineer or Owner.  Stakes for anchors shall be a minimum of 1” x 1” x 3 ft. untreated hardwood stakes, 5’ apart. Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 16 Northampton, MA  Install wattles along contours and perpendicular to sheet or concentrated flow.  Provide 3 ft. (914mm) minimum overlap at ends to join in a continuous barrier  When staking is not possible, such as when tubes must be placed on pavement, heavy concrete or cinder blocks can be used behind tubes up to 5 ft. (1.5m) apart or as required to secure tubes in place. Maintenance Requirements  The Contractor will ensure that the wattles function as intended at all times. Wattles will be inspected weekly, after each rainfall of 0.25-inches, and at least daily during prolonged rainfall. Inspection will be frequent and repair or replacement will be made promptly and as directed by the Engineer or Owner. Wattles will be removed when they have served their usefulness so as not to block or impede storm flow or drainage. After a storm event, if there is evidence of stormwater circumventing or undercutting the perimeter control, extend control and/or repair undercut areas to fix the problem.  All erosion and sedimentation control measures will be maintained in effective condition throughout the construction period. The contractor will remove accumulated sediment from behind control measures before it has accumulated to one-half of the above- ground height of any perimeter control. All erosion and sedimentation control measures found to be in need of repair or replacement will be immediately corrected so as to maintain the integrity of installed systems Perimeter Control # 2 Perimeter Control Description – Siltation Fence  Silt fencing shall be utilized to control run-off and prevent siltation of open and subsurface drainage systems, areas outside work limits, stockpiles, and undisturbed areas, if necessary.   Silt fence will be installed around the perimeter of the IVW to protect it from siltation and to define the work area. Timber mats will temporarily impact this IW along the western edge to allow access for equipment.  Silt fence will also be installed from construction access road south along the road to the VHI parking lot, west along the parking lot to the top of the levee, then north from the VHI parking lot to approximately MW-4 where the bank restoration and tree removal work begins. At this point the silt fence will continue west down the bank to the top of the levee retaining wall and continue upstream/north along the top of the retaining wall to the northerly project terminus at the existing chain link fence, where it will follow the fence easterly to the base of the slope under the road. Silt fence will not be installed along the road as it is elevated above the entire work site, except in the vicinity of the construction access road where silt fence will be installed along its north and south edges. If catch-basins are identified within the roadway downgradient of the project limits they will be protected with silt sacks. Silt fence will also be installed around the perimeter of the isolated vegetated wetland as shown in the Riverbank Restoration plan set (OHI, Dec. 2022) Sheets C7-2 and C7-3. Installation Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 17 Northampton, MA  Manufactured product including siltation control geotextile and support posts.  Support posts shall be softwood measuring 1-1/2 inches by 1-1/2 inches or oak measuring 1” by 1”.  Filter fabric shall extend 6 inches below undisturbed ground (“toed into ground”). Maintenance Requirements  Inspect all erosion and sediment controls daily. Also, inspect all erosion and sediment controls before an anticipated storm greater than 0.25 inches, and following a significant storm event (0.25 inches or greater total rainfall).  All erosion and sediment control devices shall be maintained in proper functioning order until final grading and stabilization is completed.  Siltation fence will be removed when they have served their usefulness so as not to block or impede storm flow or drainage. After a storm event, if there is evidence of stormwater circumventing or undercutting the perimeter control, extend control and/or repair undercut areas to fix the problem.  The contractor will remove accumulated sediment from behind control measures before it has accumulated to one-half of the above-ground height of any perimeter control. Perimeter Control # 3 Perimeter Control Description – Erosion Control Blanket  Erosion control blanket shall be approved by the Engineer or Owner. Erosion control blanket shall be placed on all slopes greater than 4 to 1.  Erosion control blanket will be required for the protection of all seed areas or in any area where erosion is a problem. Installation  Erosion control blanket shall be installed in accordance with the accepted practices and the manufacturer's instructions and recommendations by personnel experienced with similar installations. All products and/or fastenings shall be as supplied by or recommended by the manufacturer, subject to approval by the Engineer or Owner.  Erosion control blanket shall lay loose on the grade and shall not be stretched or tightened in any direction. The blanket shall conform naturally to the contour and grade of the proposed topography.  Anchor slots, butts with structures, walls, curbs, etc., side and junction overlap and terminal folds shall be made and fastened in accordance with the manufacturer's recommendations or as directed by the Engineer or Owner. Maintenance Requirements Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 18 Northampton, MA  Inspections of site conditions will take place on a weekly basis as well as after each incidence of rainfall exceeding 0.25-inches in twenty-four hours. 4.3 Sediment Track-Out General • The Contractor will provide a mechanical sweeper equipped with a water tank, spray assembly to control dust, a pick-up broom, a dual gutter broom, and a dirt hopper during construction activities, as necessary. • Gravel tracking pads with woven geotextile filter fabric at construction entrances/exits will also be utilized to prevent tracking or flowing of sediment out of the construction area. Hay bales will be utilized in conjunction with the gravel tracking pads to channelize runoff. See Construction Entrance detail on sheet C7.1. • Contractor and Sub-contractors may utilize water spray, as necessary, for dust control and wheel washing which will limit the amount of track-out. All wheel washing will take place only on the track-out pad located over the existing stockpile, thus capturing any contaminants within the stockpile. Specific Track-Out Controls Track-Out Control # 1 Track-Out Control Description  The sweeper will be capable of removing millings and loose debris from the underlying surface. All existing pavement surfaces will be swept as necessary.  All wheel washing will take place only on the track-out pad located over the existing stockpile, thus capturing any contaminants within the stockpile. Installation  Sweeping operations will begin as needed. Additionally, as directed by the Engineer or Owner, sweeping and cleaning of surfaces will be conducted beyond the limits of the project to clean up material caused by spillage or vehicular tracking during the various phases of the work.  Gravel tracking pads will be constructed 16’ wide, a minimum of 30’ long, with a minimum of 6” in thickness of 2” crushed angular stone. See Construction Entrance detail on sheet C7.1. Maintenance Requirements  The gravel tracking pads shall be maintained in a condition that will prevent tracking or flowing of sediment. Gravel will be added as necessary. Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 19 Northampton, MA 4.4 Stockpiled Sediment or Soil General  The stockpiling of soil and topsoil at the project site will be protected by straw wattle and silt fence. Stockpiled soil and topsoil will be covered or temporarily seeded until ready for use. Specific Stockpile Controls Stockpile Control Stockpiled Sediment/Soil Control Description  Asphalt related stockpiles, if needed, will be placed on a free draining base, kept separate from the other virgin aggregates and covered.  If sediments or soils must be stockpiled at the Site they will be surrounded with straw wattles and siltation fence to prevent and control siltation and erosion. Topsoil stockpiles that will remain unused for 14 days or more will immediately initiate stabilization and complete installation of stabilization measures as soon as practicable, but no later than 14 days after stabilization was initialized.  Soils assumed to be impacted by oil and/or hazardous materials will be surrounded with staked compost filter tubes (or hay bales) and siltation fences, placed only on areas designated as containing “Similar Soils” as defined by MassDEP Guidance WSC#13-500, designated on the Plan Set as “Limit of Raceway Fill”, and covered with a temporary 6- mil polyethylene cover.  Piles will be located as far as possible from the Mill River, outside of any natural buffers and physically separated from other stormwater controls.  Piles will be covered to protect from wind and precipitation when not in use, and surrounded by silt fence and silt sock/straw wattles. Installation  If required, stockpiles will be established during construction activities as required by the contractor or as directed by the Engineer or Owner. Stockpiles that will remain unused for 14 days or more will immediately initiate stabilization and complete installation of stabilization measures as soon as practicable, but no later than 14 days after stabilization was initialized. Maintenance Requirements  If stockpiles are required, inspections of site conditions will take place on a weekly basis as well as after each incidence of rainfall exceeding 0.25-inches in twenty-four hours. Areas on or around the stockpile(s) that have eroded will be stabilized immediately with erosion controls. 4.5 Minimize Dust General Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 20 Northampton, MA • The Contractor will provide a mechanical sweeper equipped with a water tank, spray assembly to control dust, a pick-up broom, a dual gutter broom, and a dirt hopper. Additionally, a mechanical hand sweeper with a water wagon will be utilized throughout the project as needed. Specific Dust Controls Dust Control # 1 Dust Control Description  The Contractor will provide for the removal of all dirt spilled from their trucks on existing pavement over which it is hauled, or otherwise deposited thereon whenever, in the judgment of the Engineer or Owner, the accumulation is sufficient to cause the formation of mud or dust, interfere with drainage, or create a traffic hazard. Installation  Water spray will be applied as needed or as directed by the Engineer or Owner. Maintenance Requirements  Potentially dusty areas will be swept or sprayed as needed and prior to rain events. 4.6 Minimize the Disturbance of Steep Slopes General  Erosion control blanket shall be provided, Model S150 Double Net Short-Term Blanket (12 months) by North American Green, Evansville, IN), or equal. Erosion control blanket shall be placed on all slopes greater than 4 to 1.  Erosion control blanket will be required for the protection of all seed areas or in any area where erosion is a problem. 4.7 Topsoil General  The work shall include placing topsoil that has been obtained from within the project limits or that has been previously stockpiled and made available to the Contractor which is to be used on areas to be seeded or planted. Specific Topsoil Controls Topsoil Control # 1 Topsoil Control Description  Loam shall be as per specified by the Engineer or Owner. It shall be of uniform composition, without mixture of subsoil. It shall be free of stones, lumps, plants and their roots, debris and other extraneous matter over 1/2 inches in diameter or excess quantities of smaller pieces of the same materials as determined by the Engineer or Owner. It shall Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 21 Northampton, MA not contain toxic substances harmful to plant growth. It shall be obtained from naturally well drained areas which have never been stripped before. Installation  Topsoil will contain not less than 4% or more than 20% organic matter. Damage to vegetation by excessive watering or silt accumulation in the project area will be prevented. Maintenance Requirements  Site conditions will be inspected weekly and after storm events of 0.25-inches of rainfall and greater. 4.8 Soil Compaction General • To the extent possible, soil compaction will be avoided within the root zone. Construction activities including, but not limited to, vehicle movement, excavation, embankment, staging and storage of materials or equipment will not occur outside the limits of the perimeter erosion controls. The access road along the top of the levee and the soil stockpile will be compacted to meet structural requirements, similar to existing conditions along the top of the levee. 4.9 Storm Drain Inlets General • Silt sacks shall be installed prior to construction, at the same time that silt fence and hay bales are installed. (There are no storm drain catch basin inlets on this Site.) • Stormwater protection will include furnishing, installation, maintenance, and removal of reusable fabric sacks to be installed in drainage structures for prevention of silt and sediment from the construction site from entering the storm water collection system. All curb openings will be blocked to prevent stormwater from bypassing the inserts. (There are no curb openings on this Site where water can flow off the Site.) • Care will be taken to prevent sediments from entering the structures when emptying the silt sacks. Any silt or debris found in the drainage system at the end of construction will be removed. (There are no storm drain catch basin inlets on this Site.) 4.10 Constructed Stormwater Conveyance Channels • There are no stormwater conveyance channels on this Site. 4.11 Sediment Basins • There are no sediment basins on this Site Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 22 Northampton, MA 4.12 Chemical Treatment • Prior to moving soil from the levee bank to the stockpile, the soil will be stabilized in place using Blastox®, a patented, fine granular, complex calcium silicate-based additive for stabilizing heavy metals. Blastox® will be applied onto the soil surface, and mixed into the soil using an excavator prior to removal of the soil from the levee and/or bank and transport to the on-site stockpile. The Blastox® process produces insoluble heavy metal compounds through chemical conversion, pH adjustment and physical encapsulation, thereby making the metals unavailable to leach. The total amount of metals in the soil will not change, but their availability to the environment will be dramatically reduced. OHI and Blastox have completed a bench-scale pilot test on the stabilization process using Site soil. OHI collected several composite surface soil samples from a location near the center of the levee, and submitted them to Blastox for the test. Bench test results indicate that the stabilization process will reduce the TCLP concentrations of metals in Site soil to below EPA land application standards (5 mg/L). A similar product and process were utilized in 2005 when metals-impacted soil from AOC-1 was stabilized prior to creating the stockpile. Information on the Blastox® soil stabilization process, the Material Safety Data Sheet, and results of the bench-scale test are included in Appendix P. 4.13 Dewatering Practices • Dewatering activities are not planned for this project. 4.14 Other Stormwater Controls • No other Stormwater controls are anticipated; however, other Stormwater controls may be implemented at the request of the Engineer or Owner. 4.15 Site Stabilization Operators must, at a minimum, initiate soil stabilization measures immediately whenever any clearing, grading, excavating or other earth disturbing activities have permanently ceased on any portion of the site, or temporarily ceased on any portion of the site and will not resume for a period exceeding 14 calendar days. In arid, semiarid, and drought-stricken areas where initiating vegetative stabilization measures immediately is infeasible, alternative stabilization measures must be employed as specified by the permitting authority. Stabilization must be completed as soon as practicable, but no later than 14 calendar days. In limited circumstances, stabilization may not be required if the intended function of a specific area of the site necessitates that it remains disturbed. Site Stabilization Practice Vegetative Non-Vegetative Temporary Permanent Description of Practice Stone Rip-Rap Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 23 Northampton, MA • From the top of the retaining wall up to the 100-year flood elevation, stone rip-rap will be placed on the face of the relaxed slope on top of orange filter fabric (Mirafi 140NL/O, or equivalent); and a bed of crushed stone. The major stones will be flat and angular with a minimum thickness of twelve inches and the interstitial spaces will be filled with smaller stone. This rip-rap is designed to withstand the water forces of a 100-year flood event much better than the current conditions, and prevent erosion of the underlying metals- impacted levee bank soils. The orange fabric, crushed stone and rip-rap are designed to be a risk reduction barrier to prevent dermal contact with remaining underlying impacted soil. Details of the rip-rap construction are shown in the Typical Wall Repair Type A/B/C cross-sections on the Riverbank Restoration plan set (OHI, 2022) Sheet C8-2. Geocell Turf Reinforcement Mat Treatment • From the top of the rip-rap at the 100-year flood elevation to the top of the levee, the newly relaxed slope will be covered with turf reinforcement mat (VMAX 3000, or equivalent) and four inches of loam on top of orange filter fabric (Mirafi 140NL/O, or equivalent); and a 12-inch layer of clean fill. The geocell mat/blanket is designed to be filled with soil and seeded, allow water to pass through, and to hold a bank in place to impede erosion. The filter fabric, clean fill, loam and turf reinforcement mat are designed to be a risk reduction barrier to prevent dermal contact with remaining underlying impacted soil. Details of the turf reinforcement mat installation are shown in the Typical Wall Repair Type A/B/C cross-sections and the Turf Reinforcement Mat details on the Riverbank Restoration plan set (OHI, 2022) Sheets C8-1 and C8-2. Grass seed shall be New England Logging/Conservation Mix, or equivalent. • A four-foot-high chain link fence will be installed along the west side of the stockpile and then down to the edge of the Mill River to restrict access to the flood plain areas west of the stockpile and the Cutlery & VHI buildings as required by their AULs. Stockpile Excavated Soil • Excavated and stabilized soil from along the levee will be transported to AOC-2 and placed on top of the filled portion of the headrace. The southern portion of the filled headrace already contains a metals-impacted soil stockpile. The existing stockpile will be increased in length toward the north and in overall height. The concentration and speciation of metals detected along the levee are consistent with the metals already contained within the stockpile and the headrace fill. Thus, the stockpile will grow in volume, but not in character. This is consistent with prior soil excavations at the Site as previously agreed between MassDEP and the Cutlery, and thus with the provisions and intent of 310 CMR 40.0030. • When final grade, side slopes and compaction of the stockpile are reached, the stockpile will be covered with an engineered risk reduction barrier to prevent dermal Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 24 Northampton, MA contact with remaining underlying impacted soil. The proposed risk reduction barrier will be constructed as follows from bottom to top: o Layer of orange non-woven filter fabric (Mirafi 140NL/O); o 18 inches of clean fill; o 6 inches of topsoil; and o Vegetation (grass – New England Logging Mix or equivalent). • The engineered risk reduction barrier installation is shown in the Impacted Soils Stockpile Area cross-section in the Riverbank Restoration plan set (OHI, 2022) Sheet C8-1. Installation  Personnel for stabilization work shall be familiar with the above construction practices and shall be under the constant supervision of a qualified foreman. Maintenance Requirements  Maintenance shall begin immediately after each portion of the Site is covered with loam and seed.  Seeded areas shall be maintained for at least 60 days or as much longer as necessary to establish a uniform stand of the specified grasses.  Maintenance and protection of seeded areas shall consist of temporary protective fences, barriers, signs, watering, weeding, cutting, and reseeding as necessary, as well as maintaining the straw or mesh cover in a uniform layer.  The surface layer of soil shall be kept damp at all times during the germination period. In the absence of adequate rainfall, watering shall be performed two or three times daily, or as often as necessary during the germination period and in sufficient quantities to maintain moist soil to a depth of at least 4 inches.  After initial growth is established, watering shall be once per week as necessary to supplement natural rain, to the equivalent of 1 inch per week, or to 4 inches in depth. Weekly inspection shall be made to determine the moisture content of the soil and the approved schedule shall be adjusted to fit conditions.  The Contractor shall, at his own expense, repair bare spots and/or damage resulting from erosion, gulleys, washouts, or other causes by filling with topsoil and reseeding.  In the event that lawn operations are completed too late in the fall for adequate germination and/or growth of grass, maintenance shall continue into the following spring. Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 25 Northampton, MA SECTION 5: POLLUTION PREVENTION STANDARDS Operators must design, install, implement, and maintain effective pollution prevention measures to minimize the discharge of pollutants. At a minimum, such measures must be designed, installed, implemented and maintained to: a. Minimize the discharge of pollutants from equipment and vehicle washing, wheel wash water, and other wash waters. Wash waters must be treated in a sediment basin or alternative control that provides equivalent or better treatment prior to discharge; b. Minimize the exposure of building materials, building products, construction wastes, trash, landscape materials, fertilizers, pesticides, herbicides, detergents, sanitary waste and other materials present on the site to precipitation and to stormwater. Minimization of exposure is not required in cases where the exposure to precipitation and to stormwater will not result in a discharge of pollutants, or where exposure of a specific material or product poses little risk of stormwater contamination (such as final products and materials intended for outdoor use); and c. Minimize the discharge of pollutants from spills and leaks and implement chemical spill and leak prevention and response procedures. 5.1 Potential Sources of Pollution Construction Site Pollutants Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 26 Northampton, MA 5.2 Spill Prevention and Response  Employees will be trained via tailgate sessions.  Vehicles and equipment will be maintained off-site. All vehicles and equipment including subcontractor vehicles will be checked for leaking oil and fluids. Vehicles leaking fluids will not be allowed on-site.  Hazardous materials will be stored in accordance with applicable federal, state and municipal regulations.  Spill kits will be kept within the storage area.  All spills will be cleaned immediately upon discovery. Spent absorbent materials and Northampton Health Department 212 Main Street Northampton, MA 01060 Phone: (413) 587-1214 Northampton Conservation Commission 210 Main Street, Room 11 Northampton, MA 01060 Phone: (413) 587-1263 Massachusetts Department of Environmental Protection Western Regional Office 436 Dwight Street Springfield, MA 01103 Main telephone: (413) 784-1100 Service Center: (413) 755-2214 Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 27 Northampton, MA rags will be disposed of off-site in accordance with applicable federal, state and municipal regulations. Spills large enough to discharge to surface water will be reported to the National Response Center at 1-800-424-8802. Spills large enough to exceed the applicable reportable quantity listed in the Massachusetts Contingency Plan (MCP at 310 CMR 40.0000) and the Massachusetts Oil and Hazardous Materials List (MOHML at 310 CMR 40.1600) will be reported to the Massachusetts Department of Environmental Protection within two hours of identifying the release.  Material Safety Data Sheets (MSDS), a material inventory, and emergency contact information will be maintained in the construction trailer. Emergency Contact: 888-304-1133 Northampton Police Department Northampton, MA 01006 Phone: (413) Emergency: 911 Northampton Fire Department 210 Main Street / King Street Northampton, MA 01060 Phone: (413) 587-1081 Emergency: 911 Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 28 Northampton, MA 5.3 Fueling and Maintenance of Equipment or Vehicles General  Fuels, oils, or other pollutants used in vehicle and equipment operation and maintenance are prohibited discharges. Care will be taken to provide an effective means of eliminating the discharge of spilled or leaked chemicals, including fuel, from the area where these activities will take place. Specific Pollution Prevention Practices Pollution Prevention Practice # 1 Description  Each subcontractor’s Foreman will be responsible for the detection of and response to spills and leaks. All leaks/spills will be reported to OHI Engineering. A variety of vehicles and equipment will be used on-site throughout the project including graders, excavators, loaders, paving equipment, rollers, trucks and trailers, and backhoes. All major equipment/vehicle fueling and maintenance will be performed off-site. When vehicle fueling must occur on-site, the fueling activity will occur in the staging area on top of the stockpile near the Construction Entrance. Only minor equipment maintenance will occur on-site. All equipment fluids generated from maintenance activities will be disposed of into designated drums stored on spill pallets. Absorbent, spill-cleanup materials and spill kits will be available at the staging area. Installation  Vehicle fueling and maintenance best management practices (BMPs) will begin at the start of the project. Maintenance Requirements  Inspect equipment/vehicle storage areas and/or fuel tanks weekly and after storm events exceeding 0.25-inches. Vehicles and equipment will be inspected on each day of use. Leaks will be repaired immediately, or the problem vehicle(s) or equipment will be removed from the project site. Keep an ample supply of spill-cleanup materials on- site and immediately clean up spills and dispose of materials properly. 5.4 Washing of Equipment and Vehicles General  All equipment and vehicle washing will take place on-Site over the soil stockpile. Secondary fuel absorbent mats will be placed beneath equipment during fueling. Discharges from soaps or solvents used in vehicle and equipment washing are prohibited. Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 29 Northampton, MA 5.5 Storage, Handling, and Disposal of Construction Products, Materials, and Wastes 5.5.1 Building Products  Construction equipment and maintenance materials will be stored at a combined staging area and materials storage area. Specific Pollution Prevention Practices Pollution Prevention Practice # 2 Description  A watertight shipping container, or equivalent, will be used to store hand tools, small parts and other construction materials. Installation  The materials storage area will be installed before any infrastructure is constructed at the site. Maintenance Requirements  The storage area will be inspected weekly and after storm events exceeding 0.25-inches. The storage area will be kept clean, well-organized and equipped with ample clean up supplies as appropriate for the materials being stored. Perimeter controls, containment structures, covers and liners will be repaired or replaced as required to maintain proper function. 5.5.2 Pesticides, Herbicides, Insecticides, Fertilizers, and Landscape Materials General  Pesticides, herbicides, insecticides, fertilizers, are not required for this project and are prohibited from the Site. Landscape materials will be stored at a combined staging area and materials storage area. Pollution Prevention Practice # 3 Description  Pesticides, herbicides, insecticides, and fertilizers are not required for this project and are prohibited from the Site. Landscape materials will be stored at a combined staging area and materials storage area. A watertight shipping container, or equivalent, will be used to store hand tools, small parts and other construction materials. All hazardous materials such as oil filters, petroleum products, paint, and equipment maintenance fluids will be stored in structurally sound and sealed containers under cover within the hazardous materials storage area. Installation  The materials storage area will be installed before any infrastructure is constructed at the site. Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 30 Northampton, MA Maintenance Requirements  The storage area will be inspected weekly and after storm events exceeding 0.25-inches. The storage area will be kept clean, well-organized and equipped with ample clean up supplies as appropriate for the materials being stored. Perimeter controls, containment structures, covers and liners will be repaired or replaced as required to maintain proper function. 5.5.3 Diesel Fuel, Oil, Hydraulic Fluids, Other Petroleum Products, and Other Chemicals General  Diesel fuel, oil, hydraulic fluids, other petroleum products, and other chemicals will be limited in scope of use and preferably stored off-Site; if they must be stored on-Site they will be stored at a combined staging area and materials storage area. Specific Pollution Prevention Practices Pollution Prevention Practice # 4 Description  If necessary, diesel fuel, oil, hydraulic fluids, other petroleum products, and other chemicals will be stored at a combined staging area and materials storage area that conform to the following requirements:  If any chemical container has a storage capacity of less than 55 gallons: o The containers must be water-tight, and must be kept closed, sealed, and secured when not being actively used; o If stored outside, use a spill containment pallet or similar device to capture small leaks or spills; and o Have a spill kit available on site that is in good working condition (i.e., not damaged, expired, or used up) and ensure personnel are available to respond immediately in the event of a leak or spill.  If any chemical container has a storage capacity of 55 gallons or more: o The containers must be water-tight, and must be kept closed, sealed, and secured when not being actively used; o Store containers a minimum of 50 feet from receiving waters, constructed or natural site drainage features, and storm drain inlets. If infeasible due to site constraints, store containers as far away from these features as the site permits. If site constraints prevent you from storing containers 50 feet away from receiving waters or the other features identified, you must document in your SWPPP the specific reasons why the 50-foot setback is infeasible, and how you will store containers as far away as the site permits; o Provide either (1) cover (e.g., temporary roofs) to minimize the exposure of these containers to precipitation and to stormwater, or (2) secondary containment (e.g., curbing, spill berms, dikes, spill containment pallets, double-wall, above-ground storage tank); and o Have a spill kit available on site that is in good working condition (i.e., not damaged, expired, or used up) and ensure personnel are available to respond immediately in the event of a leak or spill. Additional secondary containment measures are listed at 40 CFR § 112.7(c)(1). Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 31 Northampton, MA  Clean up spills immediately, using dry clean-up methods where possible, and dispose of used materials properly. You are prohibited from hosing the area down to clean surfaces or spills. Eliminate the source of the spill to prevent a discharge or a furtherance of an ongoing discharge. Installation  The materials storage area will be installed before any infrastructure is constructed at the site. Maintenance Requirements  The storage area will be inspected weekly and after storm events exceeding 0.25-inches. The storage area will be kept clean, well-organized and equipped with ample clean up supplies as appropriate for the materials being stored. Perimeter controls, containment structures, covers and liners will be repaired or replaced as required to maintain proper function. 5.5.4 Hazardous or Toxic Waste (Note: Examples include paints, solvents, petroleum-based products, wood preservatives, additives, curing compounds, acids.) General  Hazardous or toxic waste will be limited in scope of use and preferably stored off-Site; if they must be stored on-Site they will be stored at a combined staging area and materials storage area. Specific Pollution Prevention Practices Pollution Prevention Practice # 5 Description  If necessary, hazardous or toxic waste will be stored at a combined staging area and materials storage area. A watertight shipping container will be used to store hand tools, small parts and other construction materials. All hazardous materials such as oil filters, petroleum products, paint, and equipment maintenance fluids will be stored in structurally sound and sealed containers under cover within the hazardous materials storage area. Installation  The materials storage area will be installed before any infrastructure is constructed at the site. Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 32 Northampton, MA Maintenance Requirements  The storage area will be inspected weekly and after storm events exceeding 0.25-inches. The storage area will be kept clean, well-organized and equipped with ample clean up supplies as appropriate for the materials being stored. Perimeter controls, containment structures, covers and liners will be repaired or replaced as required to maintain proper function. 5.5.5 Construction and Domestic Waste General  Construction and domestic waste will be stored in appropriate waste containers at a combined staging area and materials storage area. Dumpsters will be covered at night and when not in use. Specific Pollution Prevention Practices Pollution Prevention Practice # 6 Description Installation  The appropriate waste containers will be installed in the materials storage area before any infrastructure is constructed at the site. Maintenance Requirements  The storage area will be inspected weekly and after storm events exceeding 0.25-inches. The storage area will be kept clean, well-organized and equipped with ample clean up supplies as appropriate for the materials being stored. Perimeter controls, containment structures, covers and liners will be repaired or replaced as required to maintain proper function. 5.5.6 Sanitary Waste General  Temporary sanitary facilities (portable toilets) will be provided at the site throughout the construction phase. Specific Pollution Prevention Practices Pollution Prevention Practice # 7 Description  The toilets will be placed as needed to provide convenient access by construction workers. The portable toilets will be located away from concentrated stormwater flow paths and traffic flow. Installation  The portable toilets will be brought on site once construction has commenced. Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 33 Northampton, MA Maintenance Requirements  Sanitary waste will be collected from the portable facilities a minimum of once per week. The portable toilets will be inspected weekly for evidence of leaking holding tanks. Toilets with leaking holding tanks will be removed and replaced with new portable toilets. 5.6 Washing of Applicators and Containers used for Paint, Concrete or Other Materials General  Washout and cleanout of stucco, paint, concrete, form release oils, curing compounds, and other construction materials will not be allowed.  Concrete washout will be performed in specified concrete washout areas (over the soil stockpile, as specified on plans) only and will adhere to treatment requirements set forth by the Engineer or Owner. 5.7 Fertilizers General  Fertilizers will not be used at this project. 5.8 Other Pollution Prevention Practices General  No additional pollution prevention practices are applicable. Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 34 Northampton, MA SECTION 6: INSPECTION AND CORRECTIVE ACTION 6.1 Inspection Personnel and Procedures Personnel Responsible for Inspections The following subcontractors’ personnel will be responsible for inspections and corrective actions while they are doing work at the Site: Subcontractor(s): OHI Engineering, Inc. Task: Design engineering; LSP services. 110 Pulpit Hill Road Amherst, MA 01002 Lyons Witten, LSP 413-262-4009 m Duffy-Willard Task: initial clearing; build construction entrance. 157 Florence Road Florence, MA Frank Willard, Owner 413-537-3753 m C.D. Davenport Task: General Contractor for tree clearing & removal, log-mats, retaining wall restoration, re-grading, stockpile construction, final grading. 130 Colrain Street Greenfield, MA 01301 Inspection Schedule Specific Inspection Frequency Inspections of all erosion controls and site conditions will be conducted on a weekly basis as well as after each incidence of rainfall exceeding 0.25-inches in twenty-four hours. In the case of multi-day storm events, inspections will occur during or after the first day and after the end of the event. Any corrective actions will be implemented immediately after any deficiencies or violations are identified. Rain Gauge Location (if applicable) The following website will be utilized to gauge rainfall amounts; https://www.weather.gov/wrh/Climate?wfo=box (Amherst COOP, MA: Northampton Area) Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 35 Northampton, MA Inspection Report Forms Copies of the inspection report forms are attached as Appendix D. Copies of the inspection reports will be provided to the Owner and Engineer weekly. 6.2 Corrective Action Personnel Responsible for Corrective Actions The following subcontractors’ personnel will be responsible for inspections and corrective actio while they are doing work at the Site: Subcontractor(s): OHI Engineering, Inc. Task: Design Engineering; LSP services 110 Pulpit Hill Road Amherst, MA 01002 Lyons Witten, LSP 413-262-4009 m Duffy-Willard Task: initial clearing; build construction entrance. 157 Florence Road Florence, MA Frank Willard, Owner 413-537-3753 m C.D. Davenport Task: General Contractor for tree clearing & removal, log-mats, retaining wall restoration, re-grading, stockpile construction, final grading. 130 Colrain Street Greenfield, MA 01301 Corrective Action Forms For a copy of the corrective action forms please refer to Appendix E. Copies of the inspection reports will be provided to the Owner and Engineer weekly. 6.3 Delegation of Authority Duly Authorized Representative(s) or Position(s): See 6.2 above Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 36 Northampton, MA SECTION 7: TRAINING Table 7-1: Documentation for Completion of Training Name Date Training Completed Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 37 Northampton, MA SECTION 8: CERTIFICATION AND NOTIFICATION I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Name: Lyons Witten, LSP (OHI Engineering, Inc.) Title: Project LSP Signature: Date: Name: Title: Signature: Date: Stormwater Pollution Prevention Plan (SWPPP) Former Cutlery Headrace Levee Retaining Wall Restoration 360 Riverside Drive September 2022, updated January 2024 38 Northampton, MA SWPPP APPENDICES Attach the following documentation to the SWPPP: Appendix A – Site Maps Appendix B – Copy of 2022 CGP Appendix C – NOI and EPA Authorization Email Appendix D – Inspection Form Appendix E – Corrective Action Form Appendix F – SWPPP Amendment Log Appendix G – Subcontractor Certifications/Agreements Appendix H – Grading and Stabilization Activities Log Appendix I – SWPPP Training Log Appendix J – Delegation of Authority Appendix K – Endangered Species Documentation Appendix L – Historic Preservation Documentation Appendix M – Impaired Waters Documentation Appendix N – Order of Conditions Appendix O – Stormwater Management Report Appendix P – Blastox Information & MSDS Appendix A – Site Maps Figure 1 Site Locus Figure 2 Orthophotograph Figure 3 Priority Resource Map Riverbank Remediation Plan Set (separate roll of 28 sheets, 24x36”, Sheet Index below) Sheet Index for revised plan set dated 1/2/24: C1.1 Title Sheet C2.1-C2.2 Legend, Abbreviations & General Notes C3.1-C3.4 Existing Conditions Plan C4.1-C4.4 Site Preparation Plan C5.1-C5.4 Layout & Materials Plan C6.1-C6.4 Grading Plan C7.1-C7.4 Erosion and Sediment Control Plan C8.1-C8.3 Construction Details C9.1 Disturbance Plan C10.1 Profile Plan E1 Existing Conditions Overview Plan E2 Demolition Overview Plan E3 Layout & Materials Overview Plan E4 Grading Overview Plan E5 Erosion and Sediment Control Overview Plan SITE LOCUSSite Locus www.ohiengineering.com v 44 Wood Ave Mansfield, MA Phone (508) 339-3929 Fax (508) 339-3140 110 Pulpit Hill Rd Amherst, MA Phone (413) 835-0780 Fax (413) 549-7918 Latitude Longitude Data Source: OHI Job # Former Cutlery 320-360 Riverside Drive Northampton, MA13-1515 Mass DEP RTN #1-13320 Rev. Date:November 20, 2014 N 42° 19' 13.4 N 72° 39' 54.7" W Figure 1 Locus Map N National Geographic www.ohiengineering.com v 44 Wood Ave Mansfield, MA Phone (508) 339-3929 Fax (508) 339-3140 110 Pulpit Hill Rd Amherst, MA Phone (413) 835-0780 Fax (413) 549-7918 Latitude Longitude Data Source: OHI Job # Former Cutlery 320-360 Riverside Drive Northampton, MA13-1515 Mass DEP RTN #1-13320 Rev. Date:November 20, 2014 N 42° 19' 13.4 N 72° 39' 54.7" W N Figure 2 Orthographic 0 330330 0 165 1" = 330' Google Maps www.ohiengineering.com v 44 Wood Ave Mansfield, MA Phone (508) 339-3929 Fax (508) 339-3140 110 Pulpit Hill Rd Amherst, MA Phone (413) 835-0780 Fax (413) 549-7918 Latitude Longitude Data Source: OHI Job # Former Cutlery 320-360 Riverside Drive Northampton, MA13-1515 Mass DEP RTN #1-13320 Rev. Date:November 20, 2014 N 42° 19' 13.4 N 72° 39' 54.7" W MassGIS, Commonwealth of Massachusetts Executive Office of Environmental Affairs IUSGS Figure 3 Priority Resource Map N Appendix B – Copy of 2022 CGP 2022 Construction General Permit (CGP) National Pollutant Discharge Elimination System (NPDES) Construction General Permit (CGP) for Stormwater Discharges from Construction Activities In compliance with the provisions of the Clean Water Act, 33 U.S.C. §1251 et. seq., (hereafter CWA), as amended by the Water Quality Act of 1987, P.L. 100-4, “operators” of construction activities (defined in Appendix A) that meet the requirements of Part 1.1 of this National Pollutant Discharge Elimination System (NPDES) Construction General Permit (CGP), are authorized to discharge pollutants in accordance with the effluent limitations and conditions set forth herein. Permit coverage is required from the “commencement of construction activities” (see Appendix A) until one of the conditions for terminating CGP coverage has been met (see Part 8.2). This permit becomes effective on 12:00 am, February 17, 2022. This permit and the authorization to discharge expire at 11:59pm, February 16, 2027. Signed and issued this 18 day of January 2022 Deborah Szaro, Acting Regional Administrator, EPA Region 1. Signed and issued this 18 day of January 2022 Javier Laureano, Director, Water Division, EPA Region 2. Signed and issued this 18 day of January 2022 Carmen Guerrero-Perez, Director, Caribbean Environmental Protection Division, EPA Region 2. Signed and issued this 18 day of January 2022 Catherine A. Libertz, Director, Water Division, EPA Region 3. Signed and issued this 18 day of January 2022 Jeaneanne Gettle, Director, Water Division, EPA Region 4. Signed and issued this 18 day of January 2022 Tera Fong, Director, Water Division, EPA Region 5. Signed and issued this 18 day of January 2022 Charles W. Maguire, Director, Water Division, EPA Region 6. Signed and issued this 18 day of January 2022 Jeffery Robichaud, Director, Water Division, EPA Region 7. Signed and issued this 18 day of January 2022 Darcy O’Connor, Director, Water Division, EPA Region 8. Signed and issued this 18 day of January 2022 Tomás Torres, Director, Water Division, EPA Region 9. Signed and issued this 18 day of January 2022 Daniel D. Opalski, Director, Water Division, EPA Region 10. Page 1 2022 Construction General Permit (CGP) Page i CONTENTS 1 How to Obtain Coverage Under the Construction General Permit (CGP) ................................... 1 1.1 Eligibility Conditions .................................................................................................................... 1 1.2 Types of Discharges Authorized ................................................................................................ 3 1.3 Prohibited Discharges................................................................................................................. 4 1.4 Submitting your Notice of Intent (NOI) ..................................................................................... 5 1.5 Requirement to Post a Notice of Your Permit Coverage ....................................................... 7 2 Technology-Based Effluent Limitations ............................................................................................. 8 2.1 General Stormwater Control Design, Installation, and Maintenance Requirements ......... 8 2.2 Erosion and Sediment Control Requirements ........................................................................ 10 2.3 Pollution Prevention Requirements ......................................................................................... 17 2.4 Construction Dewatering Requirements ................................................................................ 22 3 Water Quality-Based Effluent Limitations ........................................................................................ 23 3.1 General Effluent Limitation to Meet Applicable Water Quality Standards ....................... 23 3.2 Water Quality-based Conditions for Sites Discharging to Sensitive Waters44 .................... 23 3.3 Water quality-based conditions For sites discharging To Sensitive Waters From Construction Dewatering activities .................................................................................................... 24 4 Site Inspection Requirements .......................................................................................................... 28 4.1 Person(s) Responsible for Inspecting Site ............................................................................... 28 4.2 Frequency of Inspections. ........................................................................................................ 28 4.3 Increase in Inspection Frequency for Certain Sites. ............................................................. 29 4.4 Reductions in Inspection Frequency ...................................................................................... 30 4.5 Areas that Must Be Inspected ................................................................................................. 31 4.6 Requirements for Inspections .................................................................................................. 32 4.7 Inspection Report ...................................................................................................................... 33 4.8 Inspections By EPA .................................................................................................................... 34 5 Corrective Actions ............................................................................................................................ 34 5.1 Conditions Triggering Corrective Action. ............................................................................... 34 5.2 Corrective Action Deadlines ................................................................................................... 35 5.3 Corrective Action Required by EPA ....................................................................................... 36 5.4 Corrective Action Log .............................................................................................................. 36 6 Stormwater Team Formation/ Staff Training Requirements .......................................................... 36 6.1 Stormwater Team ...................................................................................................................... 36 6.2 General Training Requirements For Stormwater Team Members ....................................... 37 6.3 Training Requirements For Persons Conducting Inspections ............................................... 37 6.4 Stormwater Team’s Access To Permit Documents ............................................................... 38 2022 Construction General Permit (CGP) Page ii 7 Stormwater Pollution Prevention Plan (SWPPP) .............................................................................. 38 7.1 General Requirements ............................................................................................................. 38 7.2 SWPPP Contents ........................................................................................................................ 38 7.3 On-Site Availability of Your SWPPP .......................................................................................... 46 7.4 SWPPP Modifications ................................................................................................................ 46 8 How to Terminate Coverage ........................................................................................................... 47 8.1 Minimum Information Required in NOT .................................................................................. 47 8.2 Conditions for Terminating CGP Coverage .......................................................................... 47 8.3 How to Submit Your NOT .......................................................................................................... 48 8.4 Deadline for Submitting the NOT ............................................................................................ 49 8.5 Effective Date of Termination of Coverage .......................................................................... 49 9 Permit Conditions Applicable to Specific States, Indian Country Lands, or Territories ............. 49 Appendix A: Definitions ........................................................................................................................ A-1 Appendix B: Permit Areas Eligible for Coverage and EPA Regional Addresses ........................... B-1 Appendix C: Small Construction Waivers and Instructions .............................................................. C-1 Appendix D: Eligibility Procedures Relating to Threatened & Endangered Species Protection . D-1 Appendix E: Historic Property Screening Process .............................................................................. E-1 Appendix F: Buffer Requirements .......................................................................................................... F-1 Appendix G: Standard Permit Conditions ......................................................................................... G-1 Appendix H: Notice of Intent (NOI) Form and Instructions .............................................................. H-1 Appendix I: Notice of Termination (NOT) Form and Instructions ...................................................... I-1 Appendix J: Suggested Format for Request for Chemical Treatment ............................................. J-1 Appendix K: Turbidity Benchmark Monitoring Report Form ............................................................ K-1 2022 Construction General Permit (CGP) Page 1 1 HOW TO OBTAIN COVERAGE UNDER THE CONSTRUCTION GENERAL PERMIT (CGP) To be covered under this permit, you must meet the eligibility conditions and follow the requirements for obtaining permit coverage in this Part. 1.1 ELIGIBILITY CONDITIONS 1.1.1 You are an “operator” of a construction site for which discharges will be covered under this permit. For the purposes of this permit and in the context of stormwater discharges associated with construction activity, an “operator” is any party associated with a construction project that meets either of the following two criteria: The party has operational control over construction plans and specifications, including the ability to make modifications to those plans and specifications; or The party has day-to-day operational control of those activities at a project that are necessary to ensure compliance with the permit conditions. Where there are multiple operators associated with the same project, all operators must obtain permit coverage.1 Subcontractors generally are not considered operators for the purposes of this permit. 1 If the operator of a “construction support activity” (see Part 1.2.1c) is different than the operator of the main site, that operator must also obtain permit coverage. See Part 7.1 for clarification on the sharing of permit-related functions between and among operators on the same site and for conditions that apply to developing a SWPPP for multiple operators associated with the same site. 1.1.2 Your site’s construction activities: Will disturb one or more acres of land, or will disturb less than one acre of land but are part of a common plan of development or sale (as defined in Appendix A) that will ultimately disturb one or more acres of land; or Have been designated by EPA as needing permit coverage under 40 CFR § 122.26(a)(1)(v) or 40 CFR § 122.26(b)(15)(ii); 1.1.3 Your site is located in an area where EPA is the permitting authority and where coverage under this permit is available (see Appendix B); 1.1.4 Discharges from your site are not: Already covered by a different NPDES permit for the same discharge; or In the process of having coverage under a different NPDES permit for the same discharge denied, terminated, or revoked.2, 3 2 Parts 1.1.4a and 1.1.4b do not include sites currently covered under the 2017 CGP that are in the process of obtaining coverage under this permit, nor sites covered under this permit that are transferring coverage to a different operator. 3 Notwithstanding a site being made ineligible for coverage under this permit because it falls under the description of Parts 1.1.4a or 1.1.4b, above, EPA may waive the applicable eligibility requirement after specific review if it determines that coverage under this permit is appropriate. 1.1.5 You can demonstrate you meet one of the criteria in the Endangered Species Protection section of the Notice of Intent (NOI) that you submit for coverage under this permit, per Part 1.4, with respect to the protection of Federally listed endangered or threatened species and Federally designated critical habitat under the Endangered Species Act 2022 Construction General Permit (CGP) Page 2 (ESA). If the EPA Regional Office grants you a waiver from electronic reporting per Part 1.4.2, you must complete the ESA worksheet in Appendix D to demonstrate you meet one of the criteria and submit it with your paper NOI (Appendix I). 1.1.6 You have completed the screening process in Appendix E relating to the protection of historic properties; and 1.1.7 You have complied with all requirements in Part 9 imposed by the applicable State, Indian Tribe, or Territory in which your construction activities and/or discharge will occur. 1.1.8 For “new sources” (as defined in Appendix A) only: EPA has not, prior to authorization under this permit, determined that discharges from your site will not meet applicable water quality standards. Where such a determination is made prior to authorization, EPA may notify you that an individual permit application is necessary. However, EPA may authorize your coverage under this permit after you have included appropriate controls and implementation procedures designed to bring your discharge into compliance with this permit, specifically the requirement to meet water quality standards. In the absence of information demonstrating otherwise, EPA expects that compliance with the requirements of this permit, including the requirements applicable to such discharges in Part 3, will result in discharges that meet applicable water quality standards. Discharges from your site to a Tier 2, Tier 2.5, or Tier 3 water4 will not lower the water quality of the applicable water. In the absence of information demonstrating otherwise, EPA expects that compliance with the requirements of this permit, including the requirements applicable to such discharges in Part 3.2, will result in discharges that will not lower the water quality of such waters. 4 Note: Your site will be considered to discharge to a Tier 2, Tier 2.5, or Tier 3 water if the first receiving water to which you discharge is identified by a State, Tribe, or EPA as a Tier 2, Tier 2.5, or Tier 3 water. For discharges that enter a storm sewer system prior to discharge, the first receiving water to which you discharge is the waterbody that receives the stormwater discharge from the storm sewer system. The current list of Tier 2, Tier 2.5, and Tier 3 waters located in the areas eligible for coverage under this permit can be found at https://www.epa.gov/npdes/construction-general-permit-resources-tools-and-templates. You can also use EPA’s Discharge Mapping Tool (https://www.epa.gov/npdes/epas-stormwater-discharge- mapping-tools) to assist you in identifying whether any receiving waters to which you discharge are listed as impaired (and the pollutant for which it is impaired) and whether an approved total maximum daily load (TMDL) exists for that waterbody. 1.1.9 If you plan to add “cationic treatment chemicals” (as defined in Appendix A) to stormwater and/or authorized non-stormwater prior to discharge, you may not submit your NOI until you notify your applicable EPA Regional Office (see Appendix J) in advance and the EPA Regional Office authorizes coverage under this permit after you have included appropriate controls and implementation procedures designed to ensure that your use of cationic treatment chemicals will result in discharges that meet applicable water quality standards. 2022 Construction General Permit (CGP) Page 3 1.2 TYPES OF DISCHARGES AUTHORIZED5 5 See “Discharge” as defined in Appendix A. Note: Any discharges not expressly authorized in this permit cannot become authorized or shielded from liability under CWA Section 402(k) by disclosure to EPA, State, or local authorities after issuance of this permit via any means, including the Notice of Intent (NOI) to be covered by the permit, the SWPPP, or during an inspection. 1.2.1 The following stormwater discharges are authorized under this permit provided that appropriate stormwater controls are designed, installed, and maintained (see Parts 2 and 3): Stormwater discharges, including stormwater runoff, snowmelt runoff, and surface runoff and drainage, associated with construction activity under 40 CFR § 122.26(b)(14) or § 122.26(b)(15)(i); Stormwater discharges designated by EPA as needing a permit under 40 CFR §122.26(a)(1)(v) or § 122.26(b)(15)(ii); Stormwater discharges from on or off-site construction support activities (e.g., concrete or asphalt batch plants, equipment staging yards, material storage areas, excavated material disposal areas, borrow areas) provided that: The support activity is directly related to the construction site required to have permit coverage for stormwater discharges; The support activity is not a commercial operation, nor does it serve multiple unrelated construction sites; The support activity does not continue to operate beyond the completion of the construction activity at the site it supports; and Stormwater controls are implemented in accordance with Part 2 and Part 3 for discharges from the support activity areas; and d. Stormwater discharges from earth-disturbing activities associated with the construction of staging areas and the construction of access roads conducted prior to active mining. 1.2.2 The following non-stormwater discharges associated with your construction activity are authorized under this permit provided that, with the exception of water used to control dust and to irrigate vegetation in stabilized areas, these discharges are not routed to areas of exposed soil on your site and you comply with any applicable requirements for these discharges in Parts 2 and 3: Discharges from emergency fire-fighting activities; Fire hydrant flushings; Landscape irrigation; Water used to wash vehicles and equipment, provided that there is no discharge of soaps, solvents, or detergents used for such purposes; Water used to control dust; Potable water including uncontaminated water line flushings; 2022 Construction General Permit (CGP) Page 4 External building washdown, provided soaps, solvents, and detergents are not used, and external surfaces do not contain hazardous substances (as defined in Appendix A) (e.g., paint or caulk containing polychlorinated biphenyls (PCBs)); Pavement wash waters, provided spills or leaks of toxic or hazardous substances have not occurred (unless all spill material has been removed) and where soaps, solvents, and detergents are not used. You are prohibited from directing pavement wash waters directly into any receiving water, storm drain inlet, or constructed or natural site drainage features, unless the feature is connected to a sediment basin, sediment trap, or similarly effective control; Uncontaminated air conditioning or compressor condensate; Uncontaminated, non-turbid discharges of ground water or spring water; Foundation or footing drains where flows are not contaminated with process materials such as solvents or contaminated ground water; and Uncontaminated construction dewatering water6 discharged in accordance with Part 2.4. 6 EPA notes that operators may need to comply with additional procedures to verify that the dewatering discharge is uncontaminated. Operators should review Part 9 to determine if any of these requirements apply to their discharge and should ensure that they have complied with any State, Tribal, or local dewatering requirements that apply. 1.2.3 Also authorized under this permit are discharges of stormwater listed above in Part 1.2.1, or authorized non-stormwater discharges listed above in Part 1.2.2, commingled with a discharge authorized by a different NPDES permit and/or a discharge that does not require NPDES permit authorization. 1.3 PROHIBITED DISCHARGES7 7 EPA includes these prohibited non-stormwater discharges here as a reminder to the operator that the only non-stormwater discharges authorized by this permit are at Part 1.2.2. Any unauthorized non-stormwater discharges must be covered under an individual permit or alternative general permit. The discharges listed in this Part are prohibited outright or authorized only under the identified conditions. To prevent the discharges in Parts 1.3.1 through 1.3.5, operators must comply with the applicable pollution prevention requirements in Part 2.3 or ensure the discharge is authorized by another NPDES permit consistent with Part 1.2.3 for commingled discharges. 1.3.1 Wastewater from washout of concrete, unless managed by an appropriate control as described in Part 2.3.4; 1.3.2 Wastewater from washout and/or cleanout of stucco, paint, form release oils, curing compounds, and other construction materials; 1.3.3 Fuels, oils, or other pollutants used in vehicle and equipment operation and maintenance; 1.3.4 Soaps, solvents, or detergents used in vehicle and equipment washing or external building washdown; and 1.3.5 Toxic or hazardous substances from a spill or other release. 2022 Construction General Permit (CGP) Page 5 1.4 SUBMITTING YOUR NOTICE OF INTENT (NOI) All “operators” (as defined in Appendix A) associated with your construction site who meet the Part 1.1 eligibility conditions, and who seek coverage under this permit, must submit to EPA a complete and accurate NOI in accordance with the deadlines in Table 1 prior to commencement of construction activities (as defined in Appendix A). Exception: If you are conducting construction activities in response to a public emergency (e.g., mud slides, earthquake, extreme flooding conditions, widespread disruption in essential public services), and the related work requires immediate authorization to avoid imminent endangerment to human health, public safety, or the environment, or to reestablish essential public services, you may discharge on the condition that a complete and accurate NOI is submitted within 30 calendar days after commencing construction activities (see Table 1) establishing that you are eligible for coverage under this permit. You must also provide documentation in your Stormwater Pollution Prevention Plan (SWPPP) to substantiate the occurrence of the public emergency pursuant to Part 7.2.3i. 1.4.1 Prerequisite for Submitting Your NOI You must develop a SWPPP consistent with Part 7 before submitting your NOI for coverage under this permit. 1.4.2 How to Submit Your NOI You must use EPA’s NPDES eReporting Tool (NeT) to electronically prepare and submit your NOI for coverage under the 2022 CGP unless you received a waiver from your applicable EPA Regional Office. To access NeT, go to https://cdx.epa.gov/cdx. Waivers from electronic reporting may be granted based on one of the following conditions: If your operational headquarters is physically located in a geographic area (i.e., ZIP code or census tract) that is identified as under-served for broadband Internet access in the most recent report from the Federal Communications Commission; or If you have limitations regarding available computer access or computer capability. If the EPA Regional Office grants you approval to use a paper NOI, and you elect to use it, you must complete the form in Appendix H. 1.4.3 Deadlines for Submitting Your NOI and Your Official Date of Permit Coverage Table 1 provides the deadlines for submitting your NOI and the official start date of your permit coverage, which differ depending on when you commence construction activities. 2022 Construction General Permit (CGP) Page 6 Table 1 NOI Submittal Deadlines and Official Start Date for Permit Coverage. Type of Operator NOI Submittal Deadline8 Permit Authorization Date9 Operator of a new site (i.e., a site where construction activities commence on or after February 17, 2022) At least 14 calendar days before commencing construction activities. 14 calendar days after EPA notifies you that it has received a complete NOI, unless EPA notifies you that your authorization is delayed or denied. Operator of an existing site (i.e., a site with 2017 CGP coverage where construction activities commenced prior to February 17, 2022) No later than May 18, 2022. 14 calendar days after EPA notifies you that it has received a complete NOI, unless EPA notifies you that your authorization is delayed or denied. Provided you submit your NOI no later than May 18, 2022, your authorization under the 2017 CGP is automatically continued until you have been granted coverage under this permit or an alternative NPDES permit, or coverage is otherwise terminated. New operator of a permitted site (i.e., an operator that through transfer of ownership and/or operation replaces the operator of an already permitted construction site that is either a “new site” or an “existing site”) At least 14 calendar days before the date the transfer to the new operator will take place. 14 calendar days after EPA notifies you that it has received a complete NOI, unless EPA notifies you that your authorization is delayed or denied. Operator of an “emergency-related project” (i.e., a project initiated in response to a public emergency (e.g., mud slides, earthquake, extreme flooding conditions, disruption in essential public services), for which the related work requires immediate authorization to avoid imminent endangerment to human health or the environment, or to reestablish essential public services) No later than 30 calendar days after commencing construction activities. You are considered provisionally covered under the terms and conditions of this permit immediately, and fully covered 14 calendar days after EPA notifies you that it has received a complete NOI, unless EPA notifies you that your authorization is delayed or denied. 8 If you miss the deadline to submit your NOI, any and all discharges from your construction activities will continue to be unauthorized under the CWA until they are covered by this or a different NPDES permit. EPA may take enforcement action for any unpermitted discharges that occur between the commencement of construction activities and discharge authorization. 9 Discharges are not authorized if your NOI is incomplete or inaccurate or if you are not eligible for permit coverage. 2022 Construction General Permit (CGP) Page 7 1.4.4 Modifying your NOI If after submitting your NOI you need to correct or update any fields, you may do so by submitting a “Change NOI” form using NeT. Waivers from electronic reporting may be granted as specified in Part 1.4.2. If the EPA Regional Office has granted you approval to submit a paper NOI modification, you may indicate any NOI changes on the same NOI form in Appendix H. When there is a change to the site’s operator, the new operator must submit a new NOI, and the previous operator must submit a Notice of Termination (NOT) form as specified in Part 8.3. The following modifications to an NOI form will result in a 14-day review process: • Changes to the name of the operator; • Changes to the project or site name; • Changes to the estimated area to be disturbed; • Changes to the name of the receiving water10, or additions to the applicable receiving waters; 10 As defined in Appendix A, a “receiving water” is “a “Water of the United States” as defined in 40 CFR §122.2 into which the regulated stormwater discharges. • Changes to eligibility information related to endangered species protection or historic preservation; • Changes to information provided related to the use of chemical treatment at your site; and • Changes to answers provided regarding the demolition of structures over 10,000 square feet of floor space built or renovated before January 1, 1980. During the 14-day review process, you may continue to operate based on the information provided in your original NOI, but you must wait until the review period has ended before you may commence or continue activities on any portion of your site that would be affected by any of the above modifications, unless EPA notifies you that the authorization is delayed or denied. 1.4.5 Your Official End Date of Permit Coverage Once covered under this permit, your coverage will last until the date that: You terminate permit coverage consistent with Part 8; or You receive permit coverage under a different NPDES permit or a reissued or replacement version of this permit after expiring on February 16, 2027; or You fail to submit an NOI for coverage under a reissued or replacement version of this permit before the deadline for existing construction sites where construction activities continue after this permit has expired. 1.5 REQUIREMENT TO POST A NOTICE OF YOUR PERMIT COVERAGE You must post a sign or other notice of your permit coverage at a safe, publicly accessible location in close proximity to the construction site. The notice must be located so it is visible from the public road that is nearest to the active part of the construction 2022 Construction General Permit (CGP) Page 8 site, and it must use a font large enough to be readily viewed from a public right-of-way.11 At a minimum, the notice must include: 11 If the active part of the construction site is not visible from a public road, then place the notice of permit coverage in a position that is visible from the nearest public road and as close as possible to the construction site. The NPDES ID (i.e., permit tracking number assigned to your NOI and the EPA webpage where a copy of the NOI can be found (https://permitsearch.epa.gov/epermit-search/ui/search)); A contact name and phone number for obtaining additional construction site information; The Uniform Resource Locator (URL) for the SWPPP (if available), or the following statement: “If you would like to obtain a copy of the Stormwater Pollution Prevention Plan (SWPPP) for this site, contact the EPA Regional Office at [include the appropriate CGP Regional Office contact information found at https://www.epa.gov/npdes/contact-us-stormwater#regional];” and The following statement “If you observe indicators of stormwater pollutants in the discharge or in the receiving water, contact the EPA through the following website: https://www.epa.gov/enforcement/report-environmental-violations.” 2 TECHNOLOGY-BASED EFFLUENT LIMITATIONS You must comply with the following technology-based effluent limitations in this Part for all authorized discharges.12 12 For each of the effluent limits in Part 2, as applicable to your site, you must include in your SWPPP (1) a description of the specific control(s) to be implemented to meet the effluent limit; (2) any applicable design specifications; (3) routine maintenance specifications; and (4) the projected schedule for installation/implementation. See Part 7.2.6. 2.1 GENERAL STORMWATER CONTROL DESIGN, INSTALLATION, AND MAINTENANCE REQUIREMENTS You must design, install, and maintain stormwater controls required in Parts 2.2, 2.3, and 2.4 to minimize the discharge of pollutants in stormwater from construction activities.13 To meet this requirement, you must: 13 The permit does not recommend or endorse specific products or vendors. 2.1.1 Account for the following factors in designing your stormwater controls: The expected amount, frequency, intensity, and duration of precipitation;14 14 Stormwater controls must be designed using the most recent data available to account for recent precipitation patterns and trends. The nature of stormwater runoff (i.e., flow) and run-on at the site, including factors such as expected flow from impervious surfaces, slopes, and site drainage features. You must design stormwater controls to control stormwater volume, velocity, and peak flow rates to minimize discharges of pollutants in stormwater and to minimize channel and streambank erosion and scour in the immediate vicinity of discharge points; and The soil type and range of soil particle sizes expected to be present on the site. 2022 Construction General Permit (CGP) Page 9 If your site is exposed to or has previously experienced major storms, such as hurricanes, storm surge, extreme/heavy precipitation, and flood events, you should also include consideration of and contingencies for whether implementing structural improvements, enhanced/resilient stormwater controls, and other mitigation measures may help minimize impacts from stormwater discharges from such major storm events. 2.1.2 Design and install all stormwater controls in accordance with good engineering practices, including applicable design specifications.15 15 Design specifications may be found in manufacturer specifications and/or in applicable erosion and sediment control manuals or ordinances. Any departures from such specifications must reflect good engineering practices and must be explained in your SWPPP. You must also comply with any additional design and installation requirements specified for the effluent limits in Parts 2.2, 2.3, and 2.4. 2.1.3 Complete installation of stormwater controls by the time each phase of construction activities has begun. By the time construction activity in any given portion of the site begins, install and make operational any downgradient sediment controls (e.g., buffers, perimeter controls, exit point controls, storm drain inlet protection) that control discharges from the initial site clearing, grading, excavating, and other earth-disturbing activities.16 16 Note that the requirement to install stormwater controls prior to each phase of construction activities for the site does not apply to the earth disturbance associated with the actual installation of these controls. Operators should take all reasonable actions to minimize the discharges of pollutants during the installation of stormwater controls. Following the installation of these initial controls, install and make operational all stormwater controls needed to control discharges prior to subsequent earth- disturbing activities. 2.1.4 Ensure all stormwater controls are maintained and remain in effective operating condition during permit coverage and are protected from activities that would reduce their effectiveness. Comply with any specific maintenance requirements for the stormwater controls listed in this permit, as well as any recommended by the manufacturer.17 17 Any departures from such maintenance recommendations made by the manufacturer must reflect good engineering practices and must be explained in your SWPPP. If at any time you find that a stormwater control needs routine maintenance (i.e., minor repairs or other upkeep performed to ensure the site’s stormwater controls remain in effective operating condition, not including significant repairs or the need to install a new or replacement control), you must immediately initiate the needed work, and complete such work by the close of the next business day. If it is infeasible to complete the routine maintenance by the close of the next business day, you must document why this is the case and why the repair or other upkeep to be performed should still be considered routine maintenance in your inspection report under Part 4.7.1c and complete such work no later than seven (7) calendar days from the time of discovery of the condition requiring maintenance. If you must repeatedly (i.e., three (3) or more times) make the same routine maintenance fixes to the same control at the same location, even if the fix can be completed by the close of the next business day, you must either: Complete work to fix any subsequent repeat occurrences of this same problem under the corrective action procedures in Part 5, including keeping any records 2022 Construction General Permit (CGP) Page 10 of the condition and how it was corrected under Part 5.4; or Document in your inspection report under Part 4.7.1c why the specific reoccurrence of this same problem should still be addressed as a routine maintenance fix under this Part.18 18 Such documentation could include, for example, that minor repairs completed within the required timeframe are all that is necessary to ensure that the stormwater control continues to operate as designed and installed and that the stormwater control remains appropriate for the flow reaching it. If at any time you find that a stormwater control needs a significant repair or that a new or replacement control is needed, you must comply with the corrective action deadlines for completing such work in in Part 5.2.1c. 2.2 EROSION AND SEDIMENT CONTROL REQUIREMENTS You must implement erosion and sediment controls in accordance with the following requirements to minimize the discharge of pollutants in stormwater from construction activities. 2.2.1 Provide and maintain natural buffers and/or equivalent erosion and sediment controls for discharges to any receiving waters that is located within 50 feet of the site’s earth disturbances. Compliance Alternatives. For any discharges to receiving waters located within 50 feet of your site’s earth disturbances, you must comply with one of the following alternatives: Provide and maintain a 50-foot undisturbed natural buffer; or Provide and maintain an undisturbed natural buffer that is less than 50 feet and is supplemented by erosion and sediment controls that achieve, in combination, the sediment load reduction equivalent to a 50-foot undisturbed natural buffer; or If infeasible to provide and maintain an undisturbed natural buffer of any size, implement erosion and sediment controls to achieve the sediment load reduction equivalent to a 50-foot undisturbed natural buffer. See Appendix F, Part F.2 for additional conditions applicable to each compliance alternative. Exceptions. See Appendix F, Part F.2 for exceptions to the compliance alternatives. 2.2.2 Direct stormwater to vegetated areas and maximize stormwater infiltration and filtering to reduce pollutant discharges, unless infiltration would be inadvisable due to the underlying geology (e.g., karst topography) and ground water contamination concerns, or infeasible due to site conditions.19 19 Operators should consider whether factors such as specific contaminant concerns from the construction site, the underlying soils or geology, hydrology, depth to the ground water table, or proximity to source water or wellhead protection area(s) make the site unsuitable for infiltrating construction stormwater. Site conditions that may be of particular concern include proximity to: a current or future drinking water aquifer; a drinking water well or spring (including private/household wells); highly conductive geology such as karst; known pollutant hot spots, such as hazardous waste sites, landfills, gas stations, brownfields; an on- site sewage system or underground storage tank; or soils that do not allow for infiltration. Operators may find it helpful to consult EPA’s Drinking Water Mapping Application to Protect Source Waters (DWMAPS). DWMAPS is an online mapping tool that can be used to locate drinking water providers, potential sources of contamination, polluted waterways, and information on protection initiatives in the site area. 2022 Construction General Permit (CGP) Page 11 2.2.3 Install sediment controls along any perimeter areas of the site that are downslope from any exposed soil or other disturbed areas.20 20 Examples of perimeter controls include filter berms; different types of silt fence such as wire-backed silt fence, super silt fence, or multi-layer geotextile silt fence; compost filter socks; gravel barriers; and temporary diversion dikes. The perimeter control must be installed upgradient of any natural buffers established under Part 2.2.1, unless the control is being implemented pursuant to Part 2.2.1a.ii-iii; To prevent stormwater from circumventing the edge of the perimeter control, install the perimeter control on the contour of the slope and extend both ends of the control up slope (e.g., at 45 degrees) forming a crescent rather than a straight line; After installation, to ensure that perimeter controls continue to work effectively: Remove sediment before it has accumulated to one-half of the above-ground height of any perimeter control; and After a storm event, if there is evidence of stormwater circumventing or undercutting the perimeter control, extend controls and/or repair undercut areas to fix the problem. Exception. For areas at “linear construction sites” (as defined in Appendix A) where perimeter controls are infeasible (e.g., due to a limited or restricted right-of-way), implement other practices as necessary to minimize pollutant discharges to perimeter areas of the site. 2.2.4 Minimize sediment track-out. Restrict vehicle use to properly designated exit points; Use appropriate stabilization techniques21 at all points that exit onto paved roads; 21 Examples of appropriate stabilization techniques include the use of aggregate stone with an underlying geotextile or non-woven filter fabric, and turf mats. Exception: Stabilization is not required for exit points at linear utility construction sites that are used only episodically and for very short durations over the life of the project, provided other exit point controls22 are implemented to minimize sediment track-out; 22 Examples of other exit point controls include preventing the use of exit points during wet periods; minimizing exit point use by keeping vehicles on site to the extent possible; limiting exit point size to the width needed for vehicle and equipment usage; using scarifying and compaction techniques on the soil; and avoiding establishing exit points in environmentally sensitive areas (e.g., karst areas; steep slopes). Implement additional track-out controls23 as necessary to ensure that sediment removal occurs prior to vehicle exit; and 23 Examples of additional track-out controls include the use of wheel washing, rumble strips, and rattle plates. Where sediment has been tracked-out from your site onto paved roads, sidewalks, or other paved areas outside of your site, remove the deposited sediment by the end of the same business day in which the track-out occurs or by the end of the next business day if track-out occurs on a non-business day. Remove the track-out by sweeping, shoveling, or vacuuming these surfaces, or by using other similarly effective means of sediment removal. You are prohibited from hosing or sweeping tracked-out 2022 Construction General Permit (CGP) Page 12 sediment into any constructed or natural site drainage feature, storm drain inlet, or receiving water.24 24 Fine grains that remain visible (e.g., staining) on the surfaces of off-site streets, other paved areas, and sidewalks after you have implemented sediment removal practices are not a violation of Part 2.2.4. 2.2.5 Manage stockpiles or land clearing debris piles composed, in whole or in part, of sediment and/or soil:25 25 The requirements in Part 2.2.5 do not apply to the storage of rock, such as rip rap, landscape rock, pipe bedding gravel, and boulders. Refer to Part 2.3.3a for the requirements that apply to these types of materials. Locate the piles outside of any natural buffers established under Part 2.2.1 and away from any constructed or natural site drainage features, storm drain inlets, and areas where stormwater flow is concentrated; Install a sediment barrier along all downgradient perimeter areas of stockpiled soil or land clearing debris piles;26 26 Examples of sediment barriers include berms, dikes, fiber rolls, silt fences, sandbags, gravel bags, or straw bale. For piles that will be unused for 14 or more days, provide cover27 or appropriate temporary stabilization (consistent with Part 2.2.14); 27 Examples of cover include tarps, blown straw and hydroseeding. You are prohibited from hosing down or sweeping soil or sediment accumulated on pavement or other impervious surfaces into any constructed or natural site drainage feature, storm drain inlet, or receiving water. 2.2.6 Minimize dust. On areas of exposed soil, minimize dust through the appropriate application of water or other dust suppression techniques to control the generation of pollutants that could be discharged in stormwater from the site. 2.2.7 Minimize steep slope disturbances. Minimize the disturbance of “steep slopes” (as defined in Appendix A).28 28 Where disturbance to steep slopes cannot be avoided, operators should consider implementing controls suitable for steep slope disturbances that are effective at minimizing erosion and sediment discharge (e.g., preservation of existing vegetation, hydraulic mulch, geotextiles and mats, compost blankets, earth dikes or drainage swales, terraces, velocity dissipation devices). To identify slopes and soil types that are of comparatively higher risk for sediment discharge in areas of the country where the CGP is in effect, operators can use the tables in Appendix F (see Tables F-2 thru F-6). 2.2.8 Preserve native topsoil, unless infeasible.29 29 Stockpiling topsoil at off-site locations, or transferring topsoil to other locations, is an example of a practice that is consistent with the requirements in Part 2.2.8. Preserving native topsoil is not required where the intended function of a specific area of the site dictates that the topsoil be disturbed or removed. For example, some sites may be designed to be highly impervious after construction, and therefore little or no vegetation is intended to remain, or may not have space to stockpile native topsoil on site for later use, in which case it may not be feasible to preserve topsoil. 2.2.9 Minimize soil compaction.30 In areas of your site where final vegetative stabilization will occur or where infiltration practices will be installed: 30 Minimizing soil compaction is not required where the intended function of a specific area of the site dictates that it be compacted. 2022 Construction General Permit (CGP) Page 13 Restrict vehicle and equipment use in these locations to avoid soil compaction; and Before seeding or planting areas of exposed soil that have been compacted, use techniques that rehabilitate and condition the soils as necessary to support vegetative growth. 2.2.10 Protect storm drain inlets. Install inlet protection measures that remove sediment from discharges prior to entry into any storm drain inlet that carries stormwater from your site to a receiving water, provided you have authority to access the storm drain inlet.31 Inlet protection measures are not required for storm drain inlets that are conveyed to a sediment basin, sediment trap, or similarly effective control; and 31 Inlet protection measures can be removed in the event of flood conditions or to prevent erosion. Clean, or remove and replace, the inlet protection measures as sediment accumulates, the filter becomes clogged, and/or performance is compromised. Where there is evidence of sediment accumulation adjacent to the inlet protection measure, remove the deposited sediment by the end of the same business day in which it is found or by the end of the following business day if removal by the same business day is not feasible. 2.2.11 Control stormwater discharges, including both peak flowrates and total stormwater volume, to minimize channel and streambank erosion and scour in the immediate vicinity of discharge points.32 32 Examples of stormwater controls that can be used to comply with this requirement include the use of erosion controls and/or velocity dissipation devices (e.g., check dams, sediment traps), within and along the length of a constructed site drainage feature and at the outfall to slow down stormwater. 2.2.12 If you install a sediment basin or similar impoundment: Situate the basin or impoundment outside of any receiving water. and any natural buffers established under Part 2.2.1; Design the basin or impoundment to avoid collecting water from wetlands; Design the basin or impoundment to provide storage for either: The calculated volume of runoff from a 2-year, 24-hour storm;33 or 3,600 cubic feet per acre drained. 33 Operators may refer to https://www.epa.gov/npdes/construction-general-permit-resources-tools-and- templates for guidance on determining the volume of precipitation associated with their site’s local 2-year, 24-hour storm event. Utilize outlet structures that withdraw water from the surface of the sediment basin or similar impoundment, unless infeasible;34 34 The circumstances in which it is infeasible to design outlet structures in this manner are rare. Exceptions may include areas with extended cold weather, where using surface outlets may not be feasible during certain time periods (although they must be used during other periods). If you determine that it is infeasible to meet this requirement, you must provide documentation in your SWPPP to support your determination, including the specific conditions or time periods when this exception will apply. Use erosion controls and velocity dissipation devices to prevent erosion at inlets and outlets; and 2022 Construction General Permit (CGP) Page 14 Remove accumulated sediment to maintain at least one-half of the design capacity and conduct all other appropriate maintenance to ensure the basin or impoundment remains in effective operating condition. 2.2.13 If using treatment chemicals (e.g., polymers, flocculants, coagulants): Use conventional erosion and sediment controls before and after the application of treatment chemicals. Chemicals may only be applied where treated stormwater is directed to a sediment control (e.g., sediment basin, perimeter control) before discharge. Select appropriate treatment chemicals. Chemicals must be appropriately suited to the types of soils likely to be exposed during construction and present in the discharges being treated (i.e., the expected turbidity, pH, and flow rate of stormwater flowing into the chemical treatment system or area). Minimize discharge risk from stored chemicals. Store all treatment chemicals in leak- proof containers that are kept under storm-resistant cover and surrounded by secondary containment structures (e.g., spill berms, dikes, spill containment pallets), or provide equivalent measures designed and maintained to minimize the potential discharge of treatment chemicals in stormwater or by any other means (e.g., storing chemicals in a covered area, having a spill kit available on site and ensuring personnel are available to respond expeditiously in the event of a leak or spill). Comply with State/local requirements. Comply with applicable State and local requirements regarding the use of treatment chemicals. Use chemicals in accordance with good engineering practices and specifications of the chemical provider/supplier. Use treatment chemicals and chemical treatment systems in accordance with good engineering practices, and with dosing specifications and sediment removal design specifications provided by the provider/supplier of the applicable chemicals, or document in your SWPPP specific departures from these specifications and how they reflect good engineering practice. Ensure proper training. Ensure all persons who handle and use treatment chemicals at the construction site are provided with appropriate, product-specific training prior to beginning application of treatment chemicals. Among other things, the training must cover proper dosing requirements. Perform additional measures specified by the EPA Regional Office for the authorized use of cationic chemicals. If you have been authorized to use cationic chemicals at your site pursuant to Part 1.1.9, you must perform all additional measures as conditioned by your authorization to ensure the use of such chemicals will not result in discharges that do not meet water quality standards. 2.2.14 Stabilize exposed portions of the site. Implement and maintain stabilization measures (e.g., seeding protected by erosion controls until vegetation is established,35 sodding, mulching, erosion control blankets, hydromulch, gravel) that minimize erosion from any areas of exposed soil on the site in accordance with Part. 35 If you will be evaluating the use of some type of erosion control netting to the site as part of your site stabilization, EPA encourages you to consider employing products that have been shown to minimize 2022 Construction General Permit (CGP) Page 15 impacts on wildlife. For instance, the U.S. Fish & Wildlife Service provides recommendations on the type of netting practices that are considered “wildlife friendly,” including those that use natural fiber or 100 percent biodegradable materials and that use a loose weave with a non-welded, movable jointed netting, as well as those products that are not wildlife friendly including square plastic netting that are degradable (e.g., photodegradable, UV-degradable, oxo-degradable), netting made from polypropylene, nylon, polyethylene, or polyester. Other recommendations include removing the netting product when it is no longer needed. See https://www.fws.gov/midwest/eastlansing/library/pdf/WildlifeFriendlyErosionControlProducts_revised.pdf for further information. There also may be State, Tribal, or local requirements about using wildlife friendly erosion control products. Stabilization Deadlines:36 36 EPA may determine, based on an inspection carried out under Part 4.8 and corrective actions required under Part 5.3, that the level of sediment discharge on the site makes it necessary to require a faster schedule for completing stabilization. For instance, if sediment discharges from an area of exposed soil that is required to be stabilized are compromising the performance of existing stormwater controls, EPA may require stabilization to correct this problem. Table 2 Deadlines for Initiating and Completing Site Stabilization. 37 Limiting disturbances to five (5) acres or less at any one time means that at no time during the project do the cumulative earth disturbances exceed five (5) acres. The following examples would qualify as limiting disturbances at any one time to five (5) acres or less: 1. The total area of disturbance for a project is five (5) acres or less. 2. The total area of disturbance for a project will exceed five (5) acres, but the operator ensures that no more than five (5) acres will be disturbed at any one time through implementation of stabilization measures. In this way, site stabilization can be used to “free up” land that can be disturbed without exceeding the five (5)-acre cap to qualify for the 14-day stabilization deadline. For instance, if an operator completes stabilization of two (2) acres of land on a five (5)-acre disturbance, then two (2) additional acres could be disturbed while still qualifying for the longer 14-day stabilization deadline. 38 The following are examples of activities that would constitute the immediate initiation of stabilization: 1. Prepping the soil for vegetative or non-vegetative stabilization as long as seeding, planting, and/or installation of non-vegetative stabilization products takes place as soon as practicable, but no later than one (1) calendar day of completing soil preparation; 2. Applying mulch or other non-vegetative product to the exposed area; 3. Seeding or planting the exposed area; 4. Starting any of the activities in # 1 – 3 on a portion of the entire area that will be stabilized; and 5. Finalizing arrangements to have stabilization product fully installed in compliance with the deadlines for completing stabilization. 39 The requirement to initiate stabilization immediately is triggered as soon as you know that construction work on a portion of the site is temporarily ceased and will not resume for 14 or more days, or as soon as you know that construction work is permanently ceased. In the context of this provision, “immediately” means as soon as practicable, but no later than the end of the next business day, following the day when the construction activities have temporarily or permanently ceased. Total Amount of Land Disturbance Occurring At Any One Time37 Deadline i. Five acres or less (≤5.0) Note: this includes sites disturbing more than five acres (>5.0) total over the course of a project, but that limit disturbance at any one time (i.e., phase the disturbance) to five acres or less (≤5.0) • Initiate the installation of stabilization measures immediately38 in any areas of exposed soil where construction activities have permanently ceased or will be temporarily inactive for 14 or more calendar days;39 and • Complete the installation of stabilization measures as soon as practicable, but no later than 14 calendar days 2022 Construction General Permit (CGP) Page 16 Total Amount of Land Disturbance Occurring At Any One Time37 Deadline after stabilization has been initiated.40 ii. More than five acres (>5.0) • Initiate the installation of stabilization measures immediately41 in any areas of exposed soil where construction activities have permanently ceased or will be temporarily inactive for 14 or more calendar days;42 and • Complete the installation of stabilization measures as soon as practicable, but no later than seven (7) calendar days after stabilization has been initiated.43 40 If vegetative stabilization measures are being implemented, stabilization is considered “installed” when all activities necessary to seed or plant the area are completed, including the application of any non- vegetative protective cover (e.g., mulch, erosion control blanket), if applicable. If non-vegetative stabilization measures are being implemented, stabilization is considered “installed” when all such measures are implemented or applied. 41 See footnote 38. 42 See footnote 39. 43 See footnote 40. 44 The term “seasonally dry period” as defined in Appendix A refers to a month in which the long-term average total precipitation is less than or equal to 0.5 inches. Refer to EPA’s Seasonally Dry Period Locator Tool at https://www.epa.gov/npdes/construction-general-permit-resources-tools-and-templates and supporting maps for assistance in determining whether a site is operating during a seasonally dry period for the area. 45 Examples include problems with the supply of seed stock or with the availability of specialized equipment and unsuitability of soil conditions due to excessive precipitation and/or flooding. Exceptions: Arid, semi-arid, and drought-stricken areas (as defined in Appendix A). If it is the seasonally dry period (as defined in Appendix A)44 or a period in which drought is occurring, and vegetative stabilization measures are being used: (a) Immediately initiate and, within 14 calendar days of temporary or permanent cessation of work in any portion of your site, complete the installation of temporary non-vegetative stabilization measures to the extent necessary to prevent erosion; (b) As soon as practicable, given conditions or circumstances on the site, complete all activities necessary to seed or plant the area to be stabilized; and (c) If construction is occurring during the seasonally dry period, indicate in your SWPPP the beginning and ending dates of the seasonally dry period and your site conditions. Also include the schedule you will follow for initiating and completing vegetative stabilization. Unforeseen circumstances. Operators that are affected by unforeseen circumstances45 that delay the initiation and/or completion of vegetative stabilization: 2022 Construction General Permit (CGP) Page 17 (a) Immediately initiate and, within 14 calendar days, complete the installation of temporary non-vegetative stabilization measures to prevent erosion; (b) Complete all soil conditioning, seeding, watering or irrigation installation, mulching, and other required activities related to the planting and initial establishment of vegetation as soon as conditions or circumstances allow it on your site; and (c) Document in the SWPPP the circumstances that prevent you from meeting the deadlines in Part 2.2.14a and the schedule you will follow for initiating and completing stabilization. Discharges to a sediment- or nutrient-impaired water or to a water that is identified by your State, Tribe, or EPA as Tier 2, Tier 2.5, or Tier 3 for antidegradation purposes. Complete stabilization as soon as practicable, but no later than seven (7) calendar days after stabilization has been initiated. Final Stabilization Criteria (for any areas not covered by permanent structures): Establish uniform, perennial vegetation (i.e., evenly distributed, without large bare areas) to provide 70 percent or more of the vegetative cover native to local undisturbed areas; and/or Implement permanent non-vegetative stabilization measures46 to provide effective cover of any areas of exposed soil. 46 Examples of permanent non-vegetative stabilization measures include riprap, gravel, gabions, and geotextiles. Exceptions: (a) Arid, semi-arid, and drought-stricken areas (as defined in Appendix A). Final stabilization is met if the area has been seeded or planted to establish vegetation that provides 70 percent or more of the vegetative cover native to local undisturbed areas within three (3) years and, to the extent necessary to prevent erosion on the seeded or planted area, non-vegetative erosion controls have been applied to provide cover for at least three years without active maintenance. (b) Disturbed areas on agricultural land that are restored to their preconstruction agricultural use. The Part 2.2.14c final stabilization criteria do not apply. (c) Areas that need to remain disturbed. In limited circumstances, stabilization may not be required if the intended function of a specific area of the site necessitates that it remain disturbed, and only the minimum area needed remains disturbed (e.g., dirt access roads, utility pole pads, areas being used for storage of vehicles, equipment, materials). 2.3 POLLUTION PREVENTION REQUIREMENTS47 47 Under this permit, you are not required to minimize exposure for any products or materials where the exposure to precipitation and to stormwater will not result in a discharge of pollutants, or where exposure of a specific material or product poses little risk of stormwater contamination (such as final products and materials intended for outdoor use). You must implement pollution prevention controls in accordance with the following requirements to minimize the discharge of pollutants in stormwater and to prevent the discharge of pollutants from spilled or leaked materials from construction activities. 2022 Construction General Permit (CGP) Page 18 2.3.1 For equipment and vehicle fueling and maintenance: Provide an effective means of eliminating the discharge of spilled or leaked chemicals, including fuels and oils, from these activities;48 48 Examples of effective means include: • Locating activities away from receiving waters, storm drain inlets, and constructed or natural site drainage feature so that stormwater coming into contact with these activities cannot reach waters of the U.S.; • Providing secondary containment (e.g., spill berms, dikes, spill containment pallets) and cover where appropriate; and • Having a spill kit available on site and ensuring personnel are available to respond expeditiously in the event of a leak or spill. If applicable, comply with the Spill Prevention Control and Countermeasures (SPCC) requirements in 40 CFR part 112 and Section 311 of the CWA; Ensure adequate supplies are available at all times to handle spills, leaks, and disposal of used liquids; Use drip pans and absorbents under or around leaky vehicles; Dispose of or recycle oil and oily wastes in accordance with other Federal, State, Tribal, or local requirements; and Clean up spills or contaminated surfaces immediately, using dry clean up measures (do not clean contaminated surfaces by hosing the area down), and eliminate the source of the spill to prevent a discharge or a continuation of an ongoing discharge. 2.3.2 For equipment and vehicle washing: Provide an effective means of minimizing the discharge of pollutants from equipment and vehicle washing, wheel wash water, and other types of wash waters;49 49 Examples of effective means include locating activities away from receiving waters and storm drain inlets or constructed or natural site drainage features and directing wash waters to a sediment basin or sediment trap, using filtration devices, such as filter bags or sand filters, or using other similarly effective controls. Ensure there is no discharge of soaps, solvents, or detergents in equipment and vehicle wash water; and For storage of soaps, detergents, or solvents, provide either (1) cover (e.g., plastic sheeting, temporary roofs) to minimize the exposure of these detergents to precipitation and to stormwater, or (2) a similarly effective means designed to minimize the discharge of pollutants from these areas. 2.3.3 For storage, handling, and disposal of building products, materials, and wastes:50 50 Compliance with the requirements of this permit does not relieve compliance requirements with respect to Federal, State, or local laws and regulations governing the storage, handling, and disposal of solid, hazardous, or toxic wastes and materials. For building materials and building products,51 provide either (1) cover (e.g., plastic sheeting, temporary roofs) to minimize the exposure of these products to 51 Examples of building materials and building products typically present at construction sites include asphalt sealants, copper flashing, roofing materials, adhesives, concrete admixtures, and gravel and mulch stockpiles. 2022 Construction General Permit (CGP) Page 19 precipitation and to stormwater, or (2) a similarly effective means designed to minimize the discharge of pollutants from these areas. Exception: Minimization of exposure is not required in cases where the exposure to precipitation and to stormwater will not result in a discharge of pollutants, or where exposure of a specific material or product poses little risk of stormwater contamination (such as final products and materials intended for outdoor use). For pesticides, herbicides, insecticides, fertilizers, and landscape materials: In storage areas, provide either (1) cover (e.g., plastic sheeting, temporary roofs) to minimize the exposure of these chemicals to precipitation and to stormwater, or (2) a similarly effective means designed to minimize the discharge of pollutants from these areas; and Comply with all application and disposal requirements included on the registered pesticide, herbicide, insecticide, and fertilizer label (see also Part 2.3.5). For diesel fuel, oil, hydraulic fluids, other petroleum products, and other chemicals: The following requirements apply to the storage and handling of chemicals on your site. If you are already implementing controls as part of an SPCC or other spill prevention plan that meet or exceed the requirements of this Part, you may continue to do so and be considered in compliance with these provisions provided you reference the applicable parts of the SPCC or other plans in your SWPPP as required in Part 7.2.6b.viii. If any chemical container has a storage capacity of less than 55 gallons: (a) The containers must be water-tight, and must be kept closed, sealed, and secured when not being actively used; (b) If stored outside, use a spill containment pallet or similar device to capture small leaks or spills; and (c) Have a spill kit available on site that is in good working condition (i.e., not damaged, expired, or used up) and ensure personnel are available to respond immediately in the event of a leak or spill. If any chemical container has a storage capacity of 55 gallons or more: (a) The containers must be water-tight, and must be kept closed, sealed, and secured when not being actively used; (b) Store containers a minimum of 50 feet from receiving waters, constructed or natural site drainage features, and storm drain inlets. If infeasible due to site constraints, store containers as far away from these features as the site permits. If site constraints prevent you from storing containers 50 feet away from receiving waters or the other features identified, you must document in your SWPPP the specific reasons why the 50-foot setback is infeasible, and how you will store containers as far away as the site permits; (c) Provide either (1) cover (e.g., temporary roofs) to minimize the exposure of these containers to precipitation and to stormwater, or (2) secondary containment (e.g., curbing, spill berms, dikes, spill containment pallets, double-wall, above-ground storage tank); and (d) Have a spill kit available on site that is in good working condition (i.e., not 2022 Construction General Permit (CGP) Page 20 damaged, expired, or used up) and ensure personnel are available to respond immediately in the event of a leak or spill. Additional secondary containment measures are listed at 40 CFR § 112.7(c)(1). Clean up spills immediately, using dry clean-up methods where possible, and dispose of used materials properly. You are prohibited from hosing the area down to clean surfaces or spills. Eliminate the source of the spill to prevent a discharge or a furtherance of an ongoing discharge. For hazardous or toxic wastes:52 52 Examples of hazardous or toxic waste that may be present at construction sites include paints, caulks, sealants, fluorescent light ballasts, solvents, petroleum-based products, wood preservatives, additives, curing compounds, and acids. Separate hazardous or toxic waste from construction and domestic waste; Store waste in sealed containers, constructed of suitable materials to prevent leakage and corrosion, and labeled in accordance with applicable Resource Conservation and Recovery Act (RCRA) requirements and all other applicable Federal, State, Tribal, or local requirements; Store all outside containers within appropriately-sized secondary containment (e.g., spill berms, dikes, spill containment pallets) to prevent spills from being discharged, or provide a similarly effective means designed to prevent the discharge of pollutants from these areas (e.g., storing chemicals in a covered area, having a spill kit available on site); Dispose of hazardous or toxic waste in accordance with the manufacturer’s recommended method of disposal and in compliance with Federal, State, Tribal, and local requirements; Clean up spills immediately, using dry clean-up methods, and dispose of used materials properly. You are prohibited from hosing the area down to clean surfaces or spills. Eliminate the source of the spill to prevent a discharge or a furtherance of an ongoing discharge; and Follow all other Federal, State, Tribal, and local requirements regarding hazardous or toxic waste. For construction and domestic wastes:53 53 Examples of construction and domestic wastes include packaging materials, scrap construction materials, masonry products, timber, pipe and electrical cuttings, plastics, styrofoam, concrete, demolition debris; and other trash or discarded materials. Provide waste containers (e.g., dumpster, trash receptacle) of sufficient size and number to contain construction and domestic wastes; (a) For waste containers with lids, keep waste container lids closed when not in use, and close lids at the end of the business day and during storm events. For waste containers without lids, provide either (1) cover (e.g., a tarp, plastic sheeting, temporary roof) to minimize exposure of wastes to precipitation, or (2) a similarly effective means designed to minimize the discharge of pollutants (e.g., secondary containment); (b) On business days, clean up and dispose of waste in designated waste 2022 Construction General Permit (CGP) Page 21 containers; and (c) Clean up immediately if containers overflow, and if there is litter elsewhere on the site from escaped trash. Waste containers are not required for the waste remnant or unused portions of construction materials or final products that are covered by the exception in Part 2.2.3a provided that: (a) These wastes are stored separately from other construction or domestic wastes addressed by Part 2.3.3e.i (i.e., wastes not covered by the exception in Part 2.3.3a). If the wastes are mixed, they must be stored in waste containers as required in Part 2.3.3e.i; and (b) These wastes are stored in designated areas of the site, the wastes are described in the SWPPP (see Part 7.2.6b.ix), and identified in the site plan (see Part 7.2.4i). For sanitary waste, position portable toilets so they are secure and will not be tipped or knocked over, and are located away from receiving waters, storm drain inlets, and constructed or natural site drainage features. 2.3.4 For washing applicators and containers used for stucco, paint, concrete, form release oils, curing compounds, or other materials: Direct wash water into a leak-proof container or leak-proof and lined pit designed so no overflows can occur due to inadequate sizing or precipitation; Handle washout or cleanout wastes as follows: For liquid wastes: (a) Do not dump liquid wastes or allow them to enter into constructed or natural site drainage features, storm inlets, or receiving waters; (b) Do not allow liquid wastes to be disposed of through infiltration or to otherwise be disposed of on the ground; (c) Comply with applicable State, Tribal, or local requirements for disposal Remove and dispose of hardened concrete waste consistent with your handling of other construction wastes in Part 2.3.3e; and Locate any washout or cleanout activities as far away as possible from receiving waters, constructed or natural site drainage features, and storm drain inlets, and, to the extent feasible, designate areas to be used for these activities and conduct such activities only in these areas. 2.3.5 For the application of fertilizers: Apply at a rate and in amounts consistent with manufacturer’s specifications, or document in the SWPPP departures from the manufacturer specifications where appropriate in accordance with Part 7.2.6b.x; Apply at the appropriate time of year for your location, and preferably timed to coincide as closely as possible to the period of maximum vegetation uptake and growth; 2022 Construction General Permit (CGP) Page 22 Avoid applying before heavy rains that could cause excess nutrients to be discharged; Never apply to frozen ground; Never apply to constructed or natural site drainage features; and Follow all other Federal, State, Tribal, and local requirements regarding fertilizer application. 2.3.6 Emergency Spill Notification Requirements Discharges of toxic or hazardous substances from a spill or other release are prohibited, consistent with Part 1.3.5. Where a leak, spill, or other release containing a hazardous substance or oil in an amount equal to or in excess of a reportable quantity established under either 40 CFR part 110, 40 CFR part 117, or 40 CFR part 302 occurs during a 24-hour period, you must notify the National Response Center (NRC) at (800) 424-8802 or, in the Washington, DC metropolitan area, call (202) 267-2675 in accordance with the requirements of 40 CFR part 110, 40 CFR part 117, and 40 CFR part 302 as soon as you have knowledge of the release. You must also, within seven (7) calendar days of knowledge of the release, provide a description of the release, the circumstances leading to the release, and the date of the release. State, Tribal, or local requirements may necessitate additional reporting of spills or discharges to local emergency response, public health, or drinking water supply agencies. 2.4 CONSTRUCTION DEWATERING REQUIREMENTS Comply with the following requirements to minimize the discharge of pollutants from dewatering54 operations. 54 “Dewatering” is defined in Appendix A as “the act of draining accumulated stormwater and/or ground water from building foundations, vaults, and trenches, or other similar points of accumulation.” 2.4.1 Route dewatering water through a sediment control (e.g., sediment trap or basin, pumped water filter bag) designed to prevent discharges with visual turbidity; 55 55 For the purposes of this permit, visual turbidity is present where there is a sediment plume in the discharge or the discharge appears cloudy, or opaque, or has a visible contrast that can be identified by an observer. 2.4.2 Do not discharge visible floating solids or foam; 2.4.3 The discharge must not cause the formation of a visible sheen on the water surface, or visible oily deposits on the bottom or shoreline of the receiving water. Use an oil-water separator or suitable filtration device (such as a cartridge filter) designed to remove oil, grease, or other products if dewatering water is found to or expected to contain these materials; 2.4.4 To the extent feasible, use well-vegetated (e.g., grassy or wooded), upland areas of the site to infiltrate dewatering water before discharge.56 You are prohibited from using receiving waters as part of the treatment area; 56 See footnote 19. 2.4.5 To prevent dewatering-related erosion and related sediment discharges: Use stable, erosion-resistant surfaces (e.g., well-vegetated grassy areas, clean filter stone, geotextile underlayment) to discharge from dewatering controls; 2022 Construction General Permit (CGP) Page 23 Do not place dewatering controls, such as pumped water filter bags, on steep slopes (as defined in Appendix A); and At all points where dewatering water is discharged, comply with the velocity dissipation requirements of Part 2.2.11. 2.4.6 For backwash water, either haul it away for disposal or return it to the beginning of the treatment process; 2.4.7 Replace and clean the filter media used in dewatering devices when the pressure differential equals or exceeds the manufacturer’s specifications; and 2.4.8 Comply with dewatering-specific inspection requirements in Part 4. 3 WATER QUALITY-BASED EFFLUENT LIMITATIONS 3.1 GENERAL EFFLUENT LIMITATION TO MEET APPLICABLE WATER QUALITY STANDARDS Discharges must be controlled as necessary to meet applicable water quality standards. Discharges must also comply with any additional State or Tribal requirements that are in Part 9. In the absence of information demonstrating otherwise, EPA expects that compliance with the conditions in this permit will result in stormwater discharges being controlled as necessary to meet applicable water quality standards. If at any time you become aware, or EPA determines, that discharges are not being controlled as necessary to meet applicable water quality standards, you must take corrective action as required in Parts 5.1 and 5.2, and document the corrective actions as required in Part 5.4. EPA may insist that you install additional controls (to meet the narrative water quality-based effluent limit above) on a site-specific basis, or require you to obtain coverage under an individual permit, if information in your NOI or from other sources indicates that your discharges are not controlled as necessary to meet applicable water quality standards. This includes situations where additional controls are necessary to comply with a wasteload allocation in an EPA-established or approved TMDL. If during your coverage under a previous permit, you were required to install and maintain stormwater controls specifically to meet the assumptions and requirements of an EPA-approved or established TMDL (for any parameter) or to otherwise control your discharge to meet water quality standards, you must continue to implement such controls as part of your coverage under this permit. 3.2 WATER QUALITY-BASED CONDITIONS FOR SITES DISCHARGING TO CERTAIN IMPAIRED AND HIGH QUALITY RECEIVING WATERS For any portion of the site that discharges to a sediment or nutrient-impaired water or to a water that is identified by your State, Tribe, or EPA as Tier 2, Tier 2.5, or Tier 3 for antidegradation purposes,57 you must comply with the inspection frequency specified in Part 4.3 and you must comply with the stabilization deadline specified in Part 2.2.14b.iii.58 57 Refer to Appendix A for definitions of “impaired water” and “Tier 2,” “Tier 2.5,” and “Tier 3” waters. For assistance in determining whether your site discharges to impaired waters, EPA has developed a tool that is available at https://www.epa.gov/npdes/epas-stormwater-discharge-mapping-tools. For assistance in determining whether your site discharges to a Tier 2, 2.5, or 3 water, refer to the list of such waters at https://www.epa.gov/npdes/construction-general-permit-resources-tools-and-templates. 58 If you qualify for any of the reduced inspection frequencies in Part 4.4, you may conduct inspections in 2022 Construction General Permit (CGP) Page 24 accordance with Part 4.4 for any portion of your site that discharges to a sensitive water. If you discharge to a water that is impaired for a parameter other than a sediment-related parameter or nutrients, EPA will inform you if any additional controls are necessary for your discharge to be controlled as necessary to meet water quality standards. These controls might include those necessary for your discharge to be consistent with the assumptions of any available wasteload allocation in any applicable TMDL. In addition, EPA may require you to apply for and obtain coverage under an individual NPDES permit. In addition, on a case-by-case basis, EPA may notify operators of new sites or operators of existing sites with increased discharges that additional analyses, stormwater controls, and/or other measures are necessary to comply with the applicable antidegradation requirements, or notify you that an individual permit application is necessary. If you discharge to a water that is impaired for polychlorinated biphenyls (PCBs) and are engaging in demolition of any structure with at least 10,000 square feet of floor space built or renovated before January 1, 1980, you must: Implement controls59 to minimize the exposure of PCB-containing building materials, including paint, caulk, and pre-1980 fluorescent lighting fixtures, to precipitation and to stormwater; and 59 Examples of controls to minimize exposure of PCBs to precipitation and stormwater include separating work areas from non-work areas and selecting appropriate personal protective equipment and tools, constructing a containment area so that all dust or debris generated by the work remains within the protected area, and using tools that minimize dust and heat (<212°F). For additional information, refer to Part 2.3.3 of the CGP Fact Sheet. Ensure that disposal of such materials is performed in compliance with applicable State, Federal, and local laws. 3.3 TURBIDITY BENCHMARK MONITORING FOR SITES DISCHARGING DEWATERING WATER TO PROTECT THE WATER QUALITY OF SENSITIVE WATERS For sites discharging dewatering water to “sensitive waters” (i.e., receiving waters listed as impaired for sediment or a sediment-related parameter (as defined in Appendix A), or receiving waters designated as a Tier 2, Tier 2.5, or Tier 3 for antidegradation purposes) you are required to comply with the benchmark monitoring requirements in this Part and document the procedures you will use at your site in your SWPPP pursuant to Part 7.2.8. A summary of these requirements is included in Table 1. EPA notes that the benchmark threshold is not an effluent limitation, rather it is an indicator that the dewatering controls may not be working to protect water quality, which the operator must investigate and correct as appropriate. A benchmark exceedance is not a permit violation. However, if a benchmark exceedance triggers corrective action in Part 5.1.5a, failure to conduct any required action is a permit violation. Where there are multiple operators associated with the same site, the operators may coordinate with one another to carry out the monitoring requirements of this Part in order to avoid duplicating efforts. Such coordinating arrangements must be described in the SWPPP consistent with Part 7.2.8. Regardless of how the operators divide the 2022 Construction General Permit (CGP) Page 25 responsibilities for monitoring and reporting, each operator remains responsible for compliance with these requirements.60 60 For instance, if Operator A relies on Operator B to meet the Part 3.3.1 turbidity monitoring requirements, the Part 3.3.4 reporting and recordkeeping requirements, and the Part 5.2.2 corrective action provisions when applicable, Operator A does not have to duplicate these same functions if Operator B is implementing them for both operators to be in compliance with the permit. However, Operator A remains responsible for complying with these permit requirements if Operator B fails to take actions that were necessary for Operator A to comply with the permit. See also footnote 83. EPA notes that both Operator A and B are required to submit turbidity monitoring reports as required under Part 3.3.4, however, Operator A’s report does not need to include the data collected by Operator B as long as Operator B submits the required data and Operator A’s report indicates that it is relying on Operator B to report the data. See Part 3.3.4a. 3.3.1 Turbidity monitoring requirements61 61 Operators may find it useful to consult EPA’s Monitoring and Inspection Guide for Construction Dewatering, available at https://www.epa.gov/npdes/construction-general-permit-resources-tools-and- templates, which provides guidelines on how to correctly monitor for turbidity, determine if the weekly average exceeds the benchmark, and, if so, how to proceed with corrective action. Sampling frequency. You must collect at least one turbidity sample from your dewatering discharge each day a discharge occurs. Sampling location. Samples must be taken at all points where dewatering water is discharged. Samples must be taken after the dewatering water has been treated by installed treatment devices pursuant to Parts 2.4.1 and 2.4.3 and prior to its discharge off site into a receiving water, constructed or natural site drainage feature, or storm drain inlet. Representative samples. Samples taken must be representative of the dewatering discharge for any given day as required in Appendix G (standard permit conditions), Part G.10.2. Test methods. Samples must be measured using a turbidity meter that reports results in nephelometric turbidity units (NTUs) and conforms with a Part 136-approved method (e.g., methods 180.1 and 2130). You are required to use the meter, and conduct a calibration verification prior to each day’s use, consistent with the manufacturer’s instructions. 3.3.2 Turbidity benchmark The benchmark threshold for turbidity for this permit is 50 NTUs (referred to elsewhere in this permit as the “standard 50 NTU benchmark”) unless EPA has authorized the use of an alternate benchmark in accordance with Part 3.3.2b. Request for alternate benchmark threshold. At any time prior to or during your coverage under this permit, you may request that EPA approve a benchmark for your site that is higher than 50 NTUs if you have information demonstrating the higher number is the same as your receiving water’s water quality standard for turbidity. Unless EPA approves an alternate benchmark, you will be required to use the standard 50 NTU benchmark. To request approval of an alternate benchmark, you must submit the following information to your applicable EPA Regional Office (see Appendix K): (a) The current turbidity water quality standard that applies to your receiving 2022 Construction General Permit (CGP) Page 26 water and the source/citation.62 62 For instance, if your site is located in Washington, DC, and you are discharging to a Class B water, for which the water quality standard is that turbidity may not increase above ambient levels by more than 20 percent, you would reference “Water Quality Standards for the District of Columbia, Chapter 11, Section 1104.8.” (b) If the applicable turbidity water quality standard requires information on natural or background turbidity levels (e.g., “no more than 10 NTU above natural turbidity levels”) to determine the specific standard for the receiving water, include available data that can be used to establish the natural turbidity levels of your receiving water (including literature studies or Federal, State, Tribal, or local government data). Data must be representative of the natural turbidity levels of your specific receiving water. Identify the source(s) of all data provided, including if the data are from samples you collected of the receiving water. EPA will inform you of its decision on whether to approve the requested alternate benchmark within 30 days. EPA may approve your request, request additional time (e.g., if additional information is needed to substantiate the data you provided), or deny your request. Unless and until EPA approves your request to use an alternate benchmark, you are required to use the standard benchmark of 50 NTUs and take any required corrective actions if an exceedance occurs. 3.3.3 Comparison of turbidity samples to benchmark. Compare the weekly average63 of your turbidity monitoring results to the standard 50 NTU benchmark, or alternate benchmark if approved by EPA. 63 A “weekly average” is defined as the sum of all of the turbidity samples taken during a “monitoring week” divided by the number of samples measured during that week. Average values should be calculated to the nearest whole number. If the weekly average of your turbidity monitoring results exceeds the standard benchmark (or your approved alternate benchmark), you are required to conduct follow-up corrective action in accordance with Part 5.2.2 and document any corrective action taken in your corrective action log in accordance with Part 5.4. For averaging purposes, a “monitoring week” starts with a Monday and ends on Sunday. Once a new monitoring week starts, you will need to calculate a new average for that week of turbidity monitoring results.64 A weekly average may consist of one or more turbidity monitoring results. 64 For example, if turbidity samples from your dewatering discharge in week 1 result in values of 30 NTU on Tuesday, 40 NTU on Wednesday, and 45 NTU on Thursday, your weekly average turbidity value would be 38.33 NTU ((30+40+45) ÷ 3 = 38 NTU). If in week 2, your turbidity samples resulted in values of 45 NTU on Monday, 30 NTU on Tuesday, 25 NTU on Wednesday, and 15 NTU on Thursday, you would calculate a new average for that week, which would yield an average turbidity value of 28.75 NTU ((45+30+25+15) ÷ 4 = 29 NTU). By comparison, if your samples on consecutive days from Friday to Monday were 60 NTU, 45 NTU, 40 NTU, and 43 NTU, respectively, and there are no other dewatering discharges for the remainder of the week, you would calculate one weekly average for the Friday to Sunday to be 48 NTU ((60+45+40) ÷ 3 = 48 NTU), and a separate weekly average for the one Monday to be 43 NTU (43 ÷ 1 = 43 NTU). Although you are not required to collect and analyze more than one turbidity sample per day from your dewatering discharge, if you do collect and analyze more than one sample on any given day, you must include any additional results in the 2022 Construction General Permit (CGP) Page 27 calculation of your weekly average (i.e., add all individual results for that monitoring week and divide by the total number of samples).65 65 For example, if during a monitoring week you take two turbidity samples on Tuesday with a value of 30 NTU and 35 NTU, three samples on Wednesday with a value of 40 NTU, 45 NTU, and 48 NTU, and one sample on Thursday with a value of 45 NTU, your weekly average turbidity value for this week would be 41 NTU ((30+35+40+45+48+45) ÷ 6 = 41 NTU). If you are conducting turbidity monitoring for more than one dewatering discharge point, you must calculate a weekly average turbidity value for each discharge point and compare each to the turbidity benchmark. 3.3.4 Reporting and recordkeeping. You must submit reports of your weekly average turbidity data to EPA no later than 30 days following the end of each monitoring quarter. If there are monitoring weeks in which there was no dewatering discharge, or if there is a monitoring quarter with no dewatering discharge, indicate this in your turbidity monitoring report. If another operator associated with your same site is conducting turbidity monitoring on your behalf pursuant to Part 3.3, indicate this in your turbidity monitoring report. For the purposes of this permit, the following monitoring quarters and reporting deadlines apply: Table 3. Monitoring Quarters and Deadlines for Reporting Turbidity Benchmark Monitoring Data. Monitoring Quarter # Months Reporting Deadline (no later than 30 days after end of the monitoring quarter) 1 January 1 – March 31 April 30 2 April 1 – June 30 July 30 3 July 1 – September 30 October 30 4 October 1 – December 31 January 30 You must use EPA’s NPDES eReporting Tool (NeT) to electronically submit your quarterly turbidity data, unless, consistent with Part 1.4.2, you received a waiver from your applicable EPA Regional Office. If the EPA Regional Office grants you approval to use a paper turbidity monitoring report form, and you elect to use it, you must complete the form in Appendix K. If EPA approves of your request to use an alternate turbidity benchmark pursuant to Part 3.3.2b, EPA will substitute the alternate benchmark in your NeT account. For each day in which you are required to monitor, you must record the monitoring information required by Appendix G, Parts G.10.2 and G.10.3 and retain all such information for a period of at least three years from the date this permit expires or from the date your authorization is terminated. 2022 Construction General Permit (CGP) Page 28 Table 4. Summary of Turbidity Benchmark Monitoring Requirements. Applicability Sampling Requirement Turbidity Benchmark Corrective Action Reporting Sites discharging dewatering water to a sediment-impaired water or to a water designated as a Tier 2, Tier 2.5, or Tier 3 for antidegradation purposes. Collect at least one turbidity sample per day, from each discharge point, on any day there is a dewatering discharge. Use turbidity sampling procedures specified in Part 3.3.1. Compare the weekly average of your turbidity monitoring results to the 50 NTU benchmark (or alternate benchmark if approved by EPA). If the weekly average of turbidity monitoring results exceeds the 50 NTU turbidity benchmark (or alternate benchmark if approved by EPA), you are required to take follow-up corrective action in accordance with Part 5.2.2. Report all weekly average turbidity monitoring results on a quarterly basis via NeT-CGP (unless use of the paper monitoring form in Appendix K is approved by EPA) no later than 30 days following the end of each monitoring quarter. 4 INSPECTION REQUIREMENTS 4.1 PERSON(S) RESPONSIBLE FOR CONDUCTING SITE AND DEWATERING INSPECTIONS The person(s) inspecting your site may be a person on your staff or a third party you hire to conduct such inspections. You are responsible for ensuring that any person conducting inspections pursuant to this Part is a “qualified person.” A qualified person is someone who has completed the training required by Part 6.3. 4.2 FREQUENCY OF INSPECTIONS.66 66 Inspections are only required during the site’s normal working hours. At a minimum, you must conduct a site inspection in accordance with one of the two schedules listed below, unless you are subject to the Part 4.3 site inspection frequency for discharges to sediment or nutrient-impaired or high quality waters, or qualify for a Part 4.4 reduction in the inspection frequency: 4.2.1 At least once every seven (7) calendar days; or 4.2.2 Once every 14 calendar days and within 24 hours67 of the occurrence of: 67 For the purposes of the inspection requirements in this Part, conducting an inspection “within 24 hours” means that once either of the two conditions in Parts 4.2.2a or 4.2.2b are met you have 24 hours from that time to conduct an inspection. For clarification, the 24 hours is counted as a continuous passage of time, and not counted by business hours (e.g., 3 business days of 8 hours each). When the 24-hour inspection time frame occurs entirely outside of normal working hours, you must conduct an inspection by no later than the end of the next business day. A storm event that produces 0.25 inches or more of rain within a 24-hour period. If a storm event produces 0.25 inches or more of rain within a 24-hour period (including when there are multiple, smaller storms that alone produce less than 0.25 inches but together produce 0.25 inches or more in 24 hours), you are required to conduct one inspection within 24 hours of when 0.25 inches of rain or more has fallen. 2022 Construction General Permit (CGP) Page 29 If a storm event produces 0.25 inches or more of rain within a 24-hour period on the first day of a storm and continues to produce 0.25 inches or more of rain on subsequent days, you must conduct an inspection within 24 hours of the first day of the storm and within 24 hours after the last day of the storm that produces 0.25 inches or more of rain (i.e., only two inspections would be required for such a storm event).68 68 For example, if 0.30 inches of rain falls on Day 1, 0.25 inches of rain falls on Day 2, and 0.10 inches of rain fall on Day 3, you would be required to conduct a first inspection within 24 hours of the Day 1 rainfall and a second inspection within 24 hours of the Day 2 rainfall, but a third inspection would not be required within 24 hours of the Day 3 rainfall. A discharge caused by snowmelt from a storm event that produces 3.25 inches69 or more of snow within a 24-hour period. You are required to conduct one inspection once the discharge of snowmelt from a 3.25-inch or more snow accumulation occurs. Additional snowmelt inspections are only required if following the discharge from the first snowmelt, there is a discharge from a separate storm event that produces 3.25 inches or more of snow. 69 This is the amount of snow that is equivalent to 0.25 inches of rain, based on information from the National Oceanic and Atmospheric Administration (NOAA) indicating that 13 inches of snow is, on average, equivalent to 1 inch of rain. See https://www.nssl.noaa.gov/education/svrwx101/winter/faq/. 4.2.3 To determine whether a storm event meets either of the thresholds in Parts 4.2.2a or 4.2.2b: For rain, you must either keep a properly maintained rain gauge on your site, or obtain the storm event information from a weather station that is representative of your location. For any 24-hour period during which there is 0.25 inches or more of rainfall, you must record the total rainfall measured for that day in accordance with Part 4.7.1d. For snow, you must either take measurements of snowfall at your site,70 or rely on similar information from a local weather forecasting provider that is representative of your location. 70 For snowfall measurements, EPA suggests use of NOAA’s National Weather Service guidelines at https://www.weather.gov/jkl/snow_measurement. These guidelines recommend use of a “snowboard” (a piece of wood about 16 inches by 16 inches) that is placed in an unobstructed part of the site on a hard surface. 4.3 INCREASE IN INSPECTION FREQUENCY FOR CERTAIN SITES. The increased inspection frequencies established in this Part take the place of the Part 4.2 inspection frequencies for the portion of the site affected. 4.3.1 For any portion of the site that discharges to a sediment or nutrient-impaired water or to a water that is identified by your State, Tribe, or EPA as Tier 2, Tier 2.5, or Tier 3 for antidegradation purposes (see Part 3.2), you must conduct an once every seven (7) calendar days and within 24 hours of the occurrence of a storm event that produces 0.25 inches or more of rain within a 24-hour period, or within 24 hours of a snowmelt discharge from a storm event that produces 3.25 inches or more of snow within a 24-hour period. 2022 Construction General Permit (CGP) Page 30 Refer to Parts 4.2.3a and 4.2.3b for the requirements to determine if a storm event produces enough rain or snow to trigger the inspection requirement. 4.3.2 For sites discharging dewatering water, you must conduct an inspection in accordance with Part 4.6.3 during the discharge once per day on which the discharge occurs. The Part 4.2 inspection frequency still applies to all other portions of the site, unless the site is affected by either the increased frequency in Part 4.3.1 or the reduced frequency in Part 4.4. 4.4 REDUCTIONS IN INSPECTION FREQUENCY 4.4.1 Stabilized areas. You may reduce the frequency of inspections to twice per month for the first month, no more than 14 calendar days apart, then once per month until permit coverage is terminated consistent with Part 8 in any area of your site where the stabilization steps in Part 2.2.14a have been completed. If construction activity resumes in this portion of the site at a later date, the inspection frequency immediately increases to that required in Parts 4.2 and 4.3, as applicable. You must document the beginning and ending dates of this period in your SWPPP. Exception. For “linear construction sites” (as defined in Appendix A) where disturbed portions have undergone final stabilization at the same time active construction continues on others, you may reduce the frequency of inspections to twice per month for the first month, no more than 14 calendar days apart, in any area of your site where the stabilization steps in Part 2.2.14a have been completed. After the first month, inspect once more within 24 hours of the occurrence of a storm event that produces 0.25 inches of rain or more within a 24-hour period, or within 24 hours of a snowmelt discharge from a storm event that produces 3.25 inches or more of snow within a 24-hour period. If there are no issues or evidence of stabilization problems, you may suspend further inspections. If “wash-out” of stabilization materials and/or sediment is observed, following re-stabilization, inspections must resume at the inspection frequency required in Part 4.4.1a. Inspections must continue until final stabilization is visually confirmed following a storm event that produces 0.25 inches of rain or more within a 24-hour period. 4.4.2 Arid, semi-arid, or drought-stricken areas (as defined in Appendix A). If it is the seasonally dry period71 or a period in which drought is occurring, you may reduce the frequency of inspections to once per month and within 24 hours of the occurrence of a storm event that produces 0.25 inches of rain or more within a 24-hour period, or within 24 hours of a snowmelt discharge from a storm event that produces 3.25 inches or more of snow within a 24-hour period. You must document that you are using this reduced schedule and the beginning and ending dates of the seasonally dry period in your SWPPP. Follow the procedures in Part 4.2.3a and 4.2.3b, accordingly, to determine if a storm event occurs that produces 0.25 inches or more of rain or 3.25 inches or more of snow within a 24-hour period. For any 24-hour period during which there is 0.25 inches or more of rainfall, or 3.25 inches or more of snow, you must record the total rainfall or snow measured for that day in accordance with Part 4.7.1d. 71 See footnote 44. 2022 Construction General Permit (CGP) Page 31 4.4.3 Frozen conditions: If you are suspending construction activities due to frozen conditions, you may temporarily suspend inspections on your site until thawing conditions (as defined in Appendix A) begin to occur if: Discharges are unlikely due to continuous frozen conditions that are likely to continue at your site for at least three (3) months based on historic seasonal averages.72 If unexpected weather conditions (such as above freezing temperatures or rain events) make discharges likely, you must immediately resume your regular inspection frequency as described in Parts 4.2 and 4.3, as applicable; 72 Use data sets that include the most recent data available to account for recent precipitation patterns and trends. Land disturbances have been suspended; and All disturbed areas of the site have been stabilized in accordance with Part 2.2.14a. If you are still conducting construction activities during frozen conditions, you may reduce your inspection frequency to once per month if: Discharges are unlikely due to continuous frozen conditions that are likely to continue at your site for at least three (3) months based on historic seasonal averages. If unexpected weather conditions (such as above freezing temperatures or rain events) make discharges likely, you must immediately resume your regular inspection frequency as described in Parts 4.2 and 4.3, as applicable; and Except for areas in which you are actively conducting construction activities, disturbed areas of the site have been stabilized in accordance with Part 2.2.14a. You must document the beginning and ending dates of this period in your SWPPP. 4.5 AREAS THAT MUST BE INSPECTED During your site inspection, you must at a minimum inspect the following areas of your site: 4.5.1 All areas that have been cleared, graded, or excavated and that have not yet completed stabilization consistent with Part 2.2.14a; 4.5.2 All stormwater controls, including pollution prevention controls, installed at the site to comply with this permit;73 73 This includes the requirement to inspect for sediment that has been tracked out from the site onto paved roads, sidewalks, or other paved areas consistent with Part 2.2.4. 4.5.3 Material, waste, borrow, and equipment storage and maintenance areas that are covered by this permit; 4.5.4 All areas where stormwater typically flows within the site, including constructed or natural site drainage features designed to divert, convey, and/or treat stormwater; 4.5.5 All areas where construction dewatering is taking place, including controls to treat the dewatering discharge and any channelized flow of water to and from those controls; 2022 Construction General Permit (CGP) Page 32 4.5.6 All points of discharge from the site; and 4.5.7 All locations where stabilization measures have been implemented. You are not required to inspect areas that, at the time of the inspection, are considered unsafe to your inspection personnel. 4.6 REQUIREMENTS FOR INSPECTIONS 4.6.1 During each site inspection, you must at a minimum: Check whether all stormwater controls (i.e., erosion and sediment controls and pollution prevention controls) are properly installed, appear to be operational, and are working as intended to minimize pollutant discharges. Check for the presence of conditions that could lead to spills, leaks, or other accumulations of pollutants on the site. Identify any locations where new or modified stormwater controls are necessary to meet the requirements of Parts 2 and/or 3. Check for signs of visible erosion and sedimentation (i.e., sediment deposits) that have occurred and are attributable to your discharge at points of discharge and, if applicable, on the banks of any receiving waters flowing within or immediately adjacent to the site; Check for signs of sediment deposition that are visible from your site and attributable to your discharge (e.g., sand bars with no vegetation growing on top in receiving waters or in other constructed or natural site drainage features, or the buildup of sediment deposits on nearby streets, curbs, or open conveyance channels). Identify any incidents of noncompliance observed. 4.6.2 If a discharge is occurring during your inspection: Identify all discharge points at the site; and Observe and document the visual quality of the discharge, and take note of the characteristics of the stormwater discharge, including color; odor; floating, settled, or suspended solids; foam; oil sheen; and other indicators of stormwater pollutants. Check also for signs of these same pollutant characteristics that are visible from your site and attributable to your discharge in receiving waters or in other constructed or natural site drainage features. 4.6.3 For dewatering inspections conducted pursuant to Parts 4.3.2, record the following in a report within 24 hours of completing the inspection: The inspection date; Names and titles of personnel making the inspection; Approximate times that the dewatering discharge began and ended on the day of inspection;74 74 If the dewatering discharge is a continuous discharge that continues after normal business hours, indicate that the discharge is continuous. Estimates of the rate (in gallons per day) of discharge on the day of inspection; 2022 Construction General Permit (CGP) Page 33 Whether or not any of the following indications of pollutant discharge were observed at the point of discharge to any receiving waters flowing through or immediately adjacent to the site and/or to constructed or natural site drainage features or storm drain inlets:75 75 If the operator observes any of these indicators of pollutant discharge, corrective action is required consistent with Parts 5.1.5b and 5.2.2. a sediment plume, suspended solids, unusual color, presence of odor, decreased clarity, or presence of foam; and/or a visible sheen on the water surface or visible oily deposits on the bottom or shoreline of the receiving water; and Photographs of (1) the dewatering water prior to treatment by a dewatering control(s) and the final discharge after treatment; (2) the dewatering control(s); and (3) the point of discharge to any receiving waters flowing through or immediately adjacent to the site and/or to constructed or natural site drainage features, storm drain inlets, and other conveyances to receiving waters. You must also comply with the Part 4.7.2, 4.7.3, and 4.7.4 requirements for signing the reports, keeping them available on site, and retaining copies. 4.6.4 Based on the results of your inspection: Complete any necessary maintenance repairs or replacements under Part 2.1.4 or under Part 5, whichever applies; and Modify your SWPPP site map in accordance with Part 7.4.1 to reflect changes to your stormwater controls that are no longer accurately reflected on the current site map. 4.7 INSPECTION REPORT 4.7.1 You must complete an inspection report within 24 hours of completing any site inspection. Each inspection report (except for dewatering inspection reports, which are covered in Part 4.6.3) must include the following: The inspection date; Names and titles of personnel making the inspection; A summary of your inspection findings, covering at a minimum the observations you made in accordance with Part 4.6, including any problems found during your inspection that make it necessary to perform routine maintenance pursuant to Part 2.1.4b or corrective action pursuant to Part 5. Include also any documentation as to why the corrective action procedures under Part 5 are unnecessary to fix a problem that repeatedly occurs as described in Part 2.1.4c; If you are inspecting your site at the frequency specified in Part 4.2.2, Part 4.3, or Part 4.4.1b, and you conducted an inspection because of a storm event that produced rainfall measuring 0.25 inches or more within a 24-hour period, you must include the applicable rain gauge or weather station readings that triggered the inspection. Similarly, if you conducted an inspection because of a snowmelt discharge from a storm event that produced 3.25 inches or more of snow within a 24-hour period, you must include any measurements taken of snowfall at your site, or weather station information you relied on; and 2022 Construction General Permit (CGP) Page 34 If you determined that it is unsafe to inspect a portion of your site, you must describe the reason you found it to be unsafe and specify the locations to which this condition applies. 4.7.2 Each inspection report must be signed by the operator’s signatory in accordance with Appendix G, Part G.11 of this permit. 4.7.3 You must keep a copy of all inspection reports at the site or at an easily accessible location, so that it can be made immediately available at the time of an on-site inspection or upon request by EPA.76 76 Inspection reports may be prepared, signed, and kept electronically, rather than in paper form, if the records are: (a) in a format that can be read in a similar manner as a paper record; (b) legally dependable with no less evidentiary value than their paper equivalent; and (c) immediately accessible to the inspector during an inspection to the same extent as a paper copy stored at the site would be, if the records were stored in paper form. For additional guidance on the proper practices to follow for the electronic retention of inspection report records, refer to the Fact Sheet discussion related to Part 4.7.3. 4.7.4 You must retain all inspection reports completed for this Part for at least three (3) years from the date that your permit coverage expires or is terminated. 4.8 INSPECTIONS BY EPA You must allow EPA, or an authorized representative of EPA, to conduct the following activities at reasonable times. To the extent that you are utilizing shared controls, that are not on site, to comply with this permit, you must make arrangements for EPA to have access at all reasonable times to those areas where the shared controls are located. 4.8.1 Enter onto all areas of the site, including any construction support activity areas covered by this permit, any off-site areas where shared controls are utilized to comply with this permit, discharge locations, adjoining waterbodies, and locations where records are kept under the conditions of this permit; 4.8.2 Access and copy any records that must be kept under the conditions of this permit; 4.8.3 Inspect your construction site, including any construction support activity areas covered by this permit (see Part 1.2.1c), any stormwater controls installed and maintained at the site, and any off-site shared controls utilized to comply with this permit; and 4.8.4 Sample or monitor for the purpose of ensuring compliance. 5 CORRECTIVE ACTIONS 5.1 CONDITIONS TRIGGERING CORRECTIVE ACTION. You must take corrective action to address any of the following conditions identified at your site: 5.1.1 A stormwater control needs a significant repair or a new or replacement control is needed, or, in accordance with Part 2.1.4c, you find it necessary to repeatedly (i.e., three (3) or more times) conduct the same routine maintenance fix to the same control at the same location (unless you document in your inspection report under Part 4.7.1c that the specific reoccurrence of this same problem should still be addressed as a routine maintenance fix under Part 2.1.4); or 5.1.2 A stormwater control necessary to comply with the requirements of this permit was never installed, or was installed incorrectly; or 2022 Construction General Permit (CGP) Page 35 5.1.3 Your discharges are not meeting applicable water quality standards; 5.1.4 A prohibited discharge has occurred (see Part 1.3); or 5.1.5 During discharge from site dewatering activities: The weekly average of your turbidity monitoring results exceeds the 50 NTU benchmark (or alternate benchmark if approved by EPA pursuant to Part 3.3.2b); or You observe or you are informed by EPA, State, or local authorities of the presence of the conditions specified in Part 4.6.3e. 5.2 CORRECTIVE ACTION DEADLINES 5.2.1 If responding to any of the Part 5.1.1, 5.1.2, 5.1.3, or 5.1.4 triggering conditions, you must: Immediately take all reasonable steps to address the condition, including cleaning up any contaminated surfaces so the material will not discharge in subsequent storm events; and When the problem does not require a new or replacement control or significant repair, the corrective action must be completed by the close of the next business day; or When the problem requires a new or replacement control or significant repair, install the new or modified control and make it operational, or complete the repair, by no later than seven (7) calendar days from the time of discovery. If it is infeasible to complete the installation or repair within seven (7) calendar days, you must document in your records why it is infeasible to complete the installation or repair within the 7-day timeframe and document your schedule for installing the stormwater control(s) and making it operational as soon as feasible after the 7-day timeframe. Where these actions result in changes to any of the stormwater controls or procedures documented in your SWPPP, you must modify your SWPPP accordingly within seven (7) calendar days of completing this work. 5.2.2 If responding to either of the Part 5.1.5 triggering conditions related to site dewatering activities, you must: Immediately take all reasonable steps to minimize or prevent the discharge of pollutants until you can implement a solution, including shutting off the dewatering discharge as soon as possible depending on the severity of the condition77 taking safety considerations into account; 77 For instance, if the weekly average of your turbidity monitoring results or a single sample is extremely high (e.g., a single turbidity sample results in 355 NTUs or higher), you should take action to safely shut off the discharge so that you can evaluate the cause of the high turbidity. Note: A single turbidity sample of 355 NTUs or higher means that the weekly average turbidity value will exceed 50 NTU regardless of the turbidity values the other days during the week. Determine whether the dewatering controls are operating effectively and whether they are causing the conditions; and Make any necessary adjustments, repairs, or replacements to the dewatering controls to lower the turbidity levels below the benchmark or remove the visible plume or sheen. 2022 Construction General Permit (CGP) Page 36 When you have completed these steps and made any changes deemed necessary, you may resume discharging from your dewatering activities. 5.3 CORRECTIVE ACTION REQUIRED BY EPA You must comply with any corrective actions required by EPA as a result of permit violations found during an inspection carried out under Part 4.8. 5.4 CORRECTIVE ACTION LOG 5.4.1 For each corrective action taken in accordance with this Part, you must record the following in a corrective action log: Within 24 hours of identifying the corrective action condition, document the specific condition and the date and time it was identified. Within 24 hours of completing the corrective action (in accordance with the deadlines in Part 5.2), document the actions taken to address the condition, including whether any SWPPP modifications are required. 5.4.2 Each entry into the corrective action log, consisting of the information required by both Parts 5.4.1a and 5.4.1b, must be signed by the operator’s signatory in accordance with Appendix G, Part G.11.2 of this permit. 5.4.3 You must keep a copy of the corrective action log at the site or at an easily accessible location, so that it can be made immediately available at the time of an on-site inspection or upon request by EPA.78 78 The corrective action log may be prepared, signed, and kept electronically, rather than in paper form, if the records are: (a) in a format that can be read in a similar manner as a paper record; (b) legally dependable with no less evidentiary value than their paper equivalent; and (c) immediately accessible to the inspector during an inspection to the same extent as a paper copy stored at the site would be, if the records were stored in paper form. For additional guidance on the proper practices to follow for the electronic retention of corrective action log records, refer to the Fact Sheet discussion related to Part 4.7.3. 5.4.4 You must retain the corrective action log for at least three (3) years from the date that your permit coverage expires or is terminated. 6 STORMWATER TEAM FORMATION/STAFF TRAINING REQUIREMENTS 6.1 STORMWATER TEAM Each operator, or group of multiple operators, must assemble a “stormwater team” that will be responsible for carrying out activities necessary to comply with this permit. The stormwater team must include the following people: Personnel who are responsible for the design, installation, maintenance, and/or repair of stormwater controls (including pollution prevention controls); Personnel responsible for the application and storage of treatment chemicals (if applicable); Personnel who are responsible for conducting inspections as required in Part 4.1; and Personnel who are responsible for taking corrective actions as required in Part 5. Members of the stormwater team must be identified in the SWPPP pursuant to Part 7.2.2. 2022 Construction General Permit (CGP) Page 37 6.2 GENERAL TRAINING REQUIREMENTS FOR STORMWATER TEAM MEMBERS Prior to the commencement of construction activities, you must ensure that all persons79 assigned to the stormwater team understand the requirements of this permit and their specific responsibilities with respect to those requirements, including the following related to the scope of their job duties: 79 If the person requiring training is a new employee who starts after you commence construction activities, you must ensure that this person has the proper understanding as required above prior to assuming particular responsibilities related to compliance with this permit. For emergency-related projects, the requirement to train personnel prior to commencement of construction activities does not apply, however, such personnel must have the required training prior to NOI submission. The permit requirements and deadlines associated with installation, maintenance, and removal of stormwater controls, as well as site stabilization; The location of all stormwater controls on the site required by this permit and how they are to be maintained; The proper procedures to follow with respect to the permit’s pollution prevention requirements; and When and how to conduct inspections, record applicable findings, and take corrective actions. Specific training requirements for persons conducting site inspections are included in Part 6.3. You are responsible for ensuring that all activities on the site comply with the requirements of this permit. You are not required to provide or document formal training for subcontractors or other outside service providers (unless the subcontractors or outside service providers are responsible for conducting the inspections required in Part 4, in which case you must provide such documentation consistent with Part 7.2.2), but you must ensure that such personnel understand any requirements of this permit that may be affected by the work they are subcontracted to perform. 6.3 TRAINING REQUIREMENTS FOR PERSONS CONDUCTING INSPECTIONS For projects that receive coverage under this permit on or after February 17, 2023, to be considered a qualified person under Part 4.1 for conducting inspections under Part 4, you must, at a minimum, either: Have completed the EPA construction inspection course developed for this permit and have passed the exam; or Hold a current valid construction inspection certification or license from a program that, at a minimum, covers the following:80 80 If one of the following topics (e.g., installation and maintenance of pollution prevention practices) is not covered by the non-EPA training program, you may consider supplementing the training with the analogous module of the EPA course (e.g., Module 4) that covers the missing topic. Principles and practices of erosion and sediment control and pollution prevention practices at construction sites; Proper installation and maintenance of erosion and sediment controls and pollution prevention practices used at construction sites; and Performance of inspections, including the proper completion of required reports and documentation, consistent with the requirements of Part 4. 2022 Construction General Permit (CGP) Page 38 For projects that receive coverage under this permit prior to February 17, 2023, any personnel conducting site inspections pursuant to Part 4 on your site must, at a minimum, be a person knowledgeable in the principles and practice of erosion and sediment controls and pollution prevention, who possesses the appropriate skills and training to assess conditions at the construction site that could impact stormwater quality, and the appropriate skills and training to assess the effectiveness of any stormwater controls selected and installed to meet the requirements of this permit.81 81 If you receive coverage for a project prior to February 17, 2023, and construction activities for the same project will continue after February 17, 2023, the personnel conducting inspections do not need to take the additional training specified in Parts 6.3a and 6.3b for inspections conducted on the project site. If the same operator obtains coverage for a different project on or after February 17, 2023, personnel conducting inspections would be required to meet the requirements for a qualified person by completing the training in either Part 6.3a or Part 6.3b. 6.4 STORMWATER TEAM’S ACCESS TO PERMIT DOCUMENTS Each member of the stormwater team must have easy access to an electronic or paper copy of applicable portions of this permit, the most updated copy of your SWPPP, and other relevant documents or information that must be kept with the SWPPP. 7 STORMWATER POLLUTION PREVENTION PLAN (SWPPP) 7.1 GENERAL REQUIREMENTS All operators associated with a construction site under this permit must develop a SWPPP consistent with the requirements in Part 7 prior to their submittal of the NOI.82, 83, 84 The SWPPP must be kept up-to-date throughout coverage under this permit. 82 The SWPPP does not establish the effluent limits and/or other permit terms and conditions that apply to your site’s discharges; these limits, terms, and conditions are established in this permit. 83 Where there are multiple operators associated with the same site, they may develop a group SWPPP instead of multiple individual SWPPPs. Regardless of whether there is a group SWPPP or multiple individual SWPPPs, each operator is responsible for compliance with the permit’s terms and conditions. In other words, if Operator A relies on Operator B to satisfy its permit obligations, Operator A does not have to duplicate those permit-related functions if Operator B is implementing them such that both operators are in compliance with the permit. However, Operator A remains responsible for permit compliance if Operator B fails to take actions necessary for Operator A to comply with the permit. In addition, all operators must ensure, either directly or through coordination with other operators, that their activities do not cause a violation or compromise any other operators’ controls and/or any shared controls. See also footnote 60. 84 There are a number of commercially available products to assist operators in developing the SWPPP, as well as companies that can be hired to help develop a site-specific SWPPP. The permit does not state which are recommended, nor does EPA endorse any specific products or vendors. Where operators choose to rely on these products or services, the choice of which ones to use to comply with the requirements of this Part is a decision for the operator alone. If a SWPPP was prepared under a previous version of this permit, the operator must review and update the SWPPP to ensure that this permit’s requirements are addressed prior to submitting an NOI for coverage under this permit. 7.2 SWPPP CONTENTS At a minimum, the SWPPP must include the information specified in this Part and as specified in other parts of this permit. 7.2.1 All Site Operators. Include a list of all other operators who will be engaged in construction activities at the site, and the areas of the site over which each operator has control. 2022 Construction General Permit (CGP) Page 39 7.2.2 Stormwater Team. Identify the personnel (by name and position) that you have made part of the stormwater team pursuant to Part 6.1, as well as their individual responsibilities, including which members are responsible for conducting inspections. Include verification that each member of the stormwater team has received the training required by Part 6.2. Include documentation that members of the stormwater team responsible for conducting inspections pursuant to Part 4 have received the training required by Part 6.3. If personnel on your team elect to complete the EPA inspector training program pursuant to Part 6.3a, you must include copies of the certificate showing that the relevant personnel have completed the training and passed the exam. If personnel on your team elect to complete a non-EPA inspector training program pursuant to Part 6.3b, you must include documentation showing that these persons have successfully completed the program and their certification or license is still current. You must also confirm that the non-EPA inspector training program satisfies the minimum elements for such programs in Part 6.3b. 7.2.3 Nature of Construction Activities. Include the following: A description of the nature of your construction activities, including the age or dates of past renovations for structures that are undergoing demolition; The size of the property (in acres or length in miles if a linear construction site); The total area expected to be disturbed by the construction activities (to the nearest quarter acre or nearest quarter mile if a linear construction site); A description of any on-site and off-site construction support activity areas covered by this permit (see Part 1.2.1c); The maximum area expected to be disturbed at any one time, including on-site and off-site construction support activity areas; A description and projected schedule for the following:85 85 If plans change due to unforeseen circumstances or for other reasons, the requirement to describe the sequence and estimated dates of construction activities is not meant to “lock in” the operator to meeting these dates. When departures from initial projections are necessary, this should be documented in the SWPPP itself, or in associated records, as appropriate. Commencement of construction activities in each portion of the site, including clearing and grubbing, mass grading, demolition activities, site preparation (i.e., excavating, cutting and filling), final grading, and creation of soil and vegetation stockpiles requiring stabilization; Temporary or permanent cessation of construction activities in each portion of the site; Temporary or final stabilization of exposed areas for each portion of the site; and Removal of temporary stormwater controls and construction equipment or vehicles, and the cessation of construction-related pollutant-generating activities. 2022 Construction General Permit (CGP) Page 40 A list and description of all pollutant-generating activities86 on the site. For each pollutant-generating activity, include an inventory of pollutants or pollutant constituents (e.g., sediment, fertilizers, pesticides, paints, caulks, sealants, fluorescent light ballasts, contaminated substrates, solvents, fuels) associated with that activity, which could be discharged in stormwater from your construction site. You must take into account where potential spills and leaks could occur that contribute pollutants to stormwater discharges, and any known hazardous or toxic substances, such as PCBs and asbestos, that will be disturbed or removed during construction; 86 Examples of pollutant-generating activities include paving operations; concrete, paint, and stucco washout and waste disposal; solid waste storage and disposal; and dewatering activities. Business days and hours for the project; If you are conducting construction activities in response to a public emergency (see Part 1.4), a description of the cause of the public emergency (e.g., mud slides, earthquake, extreme flooding conditions, widespread disruption in essential public services), information substantiating its occurrence (e.g., State disaster declaration or similar State or local declaration), and a description of the construction necessary to reestablish affected public services. 7.2.4 Site Map. Include a legible map, or series of maps, showing the following features of the site: Boundaries of the property; Locations where construction activities will occur, including: Locations where earth-disturbing activities will occur (note any phasing), including any demolition activities; Approximate slopes before and after major grading activities (note any steep slopes (as defined in Appendix A)); Locations where sediment, soil, or other construction materials will be stockpiled; Any receiving water crossings; Designated points where vehicles will exit onto paved roads; Locations of structures and other impervious surfaces upon completion of construction; and Locations of on-site and off-site construction support activity areas covered by this permit (see Part 1.2.1c). Locations of any receiving waters within the site and all receiving waters within one mile downstream of the site’s discharge point(s). Also identify if any of these receiving waters are listed as impaired or are identified as a Tier 2, Tier 2.5, or Tier 3 water; Any areas of Federally listed critical habitat within the action area of the site as defined in Appendix A; Type and extent of pre-construction cover on the site (e.g., vegetative cover, forest, pasture, pavement, structures); Drainage patterns of stormwater and authorized non-stormwater before and after major grading activities; 2022 Construction General Permit (CGP) Page 41 Stormwater and authorized non-stormwater discharge locations, including: Locations where stormwater and/or authorized non-stormwater will be discharged to storm drain inlets, including a notation of whether the inlet conveys stormwater to a sediment basin, sediment trap, or similarly effective control;87 87 The requirement to show storm drain inlets in the immediate vicinity of the site on your site map only applies to those inlets that are easily identifiable from your site or from a publicly accessible area immediately adjacent to your site. Locations where stormwater or authorized non-stormwater will be discharged directly to receiving waters (i.e., not via a storm drain inlet); and Locations where turbidity benchmark monitoring will take place to comply with Part 3.3, if applicable to your site. Locations of all potential pollutant-generating activities identified in Part 7.2.3g; Designated areas where construction wastes that are covered by the exception in Part 2.3.3e.ii because they are not pollutant-generating will be stored; Locations of stormwater controls, including natural buffer areas and any shared controls utilized to comply with this permit; and Locations where polymers, flocculants, or other treatment chemicals will be used and stored. 7.2.5 Non-Stormwater Discharges. Identify all authorized non-stormwater discharges in Part 1.2.2 that will or may occur. 7.2.6 Description of Stormwater Controls. For each of the Part 2.2 erosion and sediment control requirements, Part 2.3 pollution prevention requirements, and Part 2.4 construction dewatering requirements, as applicable to your site, you must include the following: A description of the specific control(s) to be implemented to meet these requirements; The design specifications for controls described in Part 7.2.6a.i (including references to any manufacturer specifications and/or erosion and sediment control manuals/ordinances relied upon);88 88 Design specifications may be found in manufacturer specifications and/or in applicable erosion and sediment control manuals or ordinances. Any departures from such specifications must reflect good engineering practice and must be explained in the SWPPP. Routine stormwater control maintenance specifications; and The projected schedule for stormwater control installation/implementation. You must also include any of the following additional information as applicable. Natural buffers and/or equivalent sediment controls (see Part 2.2.1 and Appendix F). You must include the following: (a) The compliance alternative to be implemented; (b) If complying with alternative 2, the width of natural buffer retained; 2022 Construction General Permit (CGP) Page 42 (c) If complying with alternative 2 or 3, the erosion and sediment control(s) you will use to achieve an equivalent sediment reduction, and any information you relied upon to demonstrate the equivalency; (d) If complying with alternative 3, a description of why it is infeasible for you to provide and maintain an undisturbed natural buffer of any size; (e) For “linear construction sites” where it is infeasible to implement compliance alternative 1, 2, or 3, a rationale for this determination, and a description of any buffer width retained and/or supplemental erosion and sediment controls installed; and (f) A description of any disturbances that are exempt under Part 2.2.1 that occur within 50 feet of a receiving water. Perimeter controls for a “linear construction site” (see Part 2.2.3d). For areas where perimeter controls are not feasible, include documentation to support this determination and a description of the other practices that will be implemented to minimize discharges of pollutants in stormwater associated with construction activities. Note: Routine maintenance specifications for perimeter controls documented in the SWPPP must include the Part 2.2.3c.i requirement that sediment be removed before it has accumulated to one-half of the above-ground height of any perimeter control. Sediment track-out controls (see Parts 2.2.4b and 2.2.4c). Document the specific stabilization techniques and/or controls that will be implemented to remove sediment prior to vehicle exit. Inlet protection measures (see Part 2.2.10a). Where inlet protection measures are not required because the storm drain inlets to which your site discharges are conveyed to a sediment basin, sediment trap, or similarly effective control, include a short description of the control that receives the stormwater flow from the site. Sediment basins (see Part 2.2.12). In circumstances where it is infeasible to utilize outlet structures that withdraw water from the surface, include documentation to support this determination, including the specific conditions or time periods when this exception will apply. Treatment chemicals (see Part 2.2.13), you must include the following: (a) A listing of the soil types that are expected to be exposed during construction in areas of the project that will drain to chemical treatment systems. Also include a listing of soil types expected to be found in fill material to be used in these same areas, to the extent you have this information prior to construction; (b) A listing of all treatment chemicals to be used at the site and why the selection of these chemicals is suited to the soil characteristics of your site; (c) If the applicable EPA Regional Office authorized you to use cationic treatment chemicals for sediment control, include the specific controls and implementation procedures designed to ensure that your use of cationic 2022 Construction General Permit (CGP) Page 43 treatment chemicals will not lead to a discharge that does not meet water quality standards; (d) The dosage of all treatment chemicals to be used at the site or the methodology to be used to determine dosage; (e) Information from any applicable Safety Data Sheet (SDS); (f) Schematic drawings of any chemically enhanced stormwater controls or chemical treatment systems to be used for application of the treatment chemicals; (g) A description of how chemicals will be stored consistent with Part 2.2.13c; (h) References to applicable State or local requirements affecting the use of treatment chemicals, and copies of applicable manufacturer’s specifications regarding the use of your specific treatment chemicals and/or chemical treatment systems; and (i) A description of the training that personnel who handle and apply chemicals have received prior to permit coverage, or will receive prior to use of the treatment chemicals at your site. Stabilization measures (see Part 2.2.14). You must include the following: (a) The specific vegetative and/or non-vegetative practices that will be used; (b) The stabilization deadline that will be met in accordance with Part 2.2.14; (c) If complying with the deadlines for sites in arid, semi-arid, or drought-stricken areas, the beginning and ending dates of the seasonally dry period (as defined in Appendix A)89 and the schedule you will follow for initiating and completing vegetative stabilization; and 89 See footnote 44. (d) If complying with deadlines for sites affected by unforeseen circumstances that delay the initiation and/or completion of vegetative stabilization, document the circumstances and the schedule for initiating and completing stabilization. Spill prevention and response procedures (see Parts 1.3.5, 2.3.3c, 2.3.3d, and 2.3.6). You must include the following: (a) Procedures for expeditiously stopping, containing, and cleaning up spills, leaks, and other releases. Identify the name or position of the employee(s) responsible for detection and response of spills or leaks; and (b) Procedures for notification of appropriate facility personnel, emergency response agencies, and regulatory agencies where a leak, spill, or other release containing a hazardous substance or oil in an amount equal to or in excess of a reportable quantity consistent with Part 2.3.6 and established under either 40 CFR part 110, 40 CFR part 117, or 40 CFR part 302, occurs 2022 Construction General Permit (CGP) Page 44 during a 24-hour period. Contact information must be in locations that are readily accessible and available to all employees. You may also reference the existence of SPCC plans developed for the construction activity under Section 311 of the CWA, or spill control programs otherwise required by an NPDES permit for the construction activity, provided that you keep a copy of that other plan on site.90 90 Even if you already have an SPCC or other spill prevention plan in existence, your plans will only be considered adequate if they meet all of the requirements of this Part, either as part of your existing plan or supplemented as part of the SWPPP. Waste management procedures (see Part 2.3.3). Describe the procedures you will follow for handling, storing, and disposing of all wastes generated at your site consistent with all applicable Federal, State, Tribal, and local requirements, including clearing and demolition debris, sediment removed from the site, construction and domestic waste, hazardous or toxic waste, and sanitary waste. You must also include the following additional information: (a) If site constraints prevent you from storing chemical containers 50 feet away from receiving waters or the other site drainage features as required in Part 2.3.3c.ii(b), document in your SWPPP the specific reasons why the 50-foot setback is not feasible, and how you will store containers as far away as the site permits; and (b) If there are construction wastes that are subject to the exception in Part 2.3.3e.ii, describe the specific wastes that will be stored on your site. Application of fertilizers (see Part 2.3.5). Document any departures from the manufacturer specifications where appropriate. 7.2.7 Procedures for Inspection, Maintenance, and Corrective Action. Describe the procedures you will follow for maintaining your stormwater controls, conducting site inspections, and, where necessary, taking corrective actions, in accordance with Part 2.1.4, Part 4, and Part 5 of this permit, accordingly. Also include: The inspection schedule you will follow, which is based on whether your site is subject to Part 4.2 or Part 4.3, or whether your site qualifies for any of the reduced inspection frequencies in Part 4.4; If you will be conducting inspections in accordance with the inspection schedule in Part 4.2.2, Part 4.3, or Part 4.4.1b, the location of the rain gauge or the address of the weather station you will be using to obtain rainfall data; If you will be reducing your inspection frequency in accordance with Part 4.4.1b, the beginning and ending dates of the seasonally defined arid period for your area or the valid period of drought; If you will be reducing your inspection frequency in accordance with Part 4.4.3, the beginning and ending dates of frozen conditions on your site; and Any maintenance or inspection checklists or other forms that will be used. 7.2.8 Procedures for Turbidity Benchmark Monitoring from Dewatering Discharges (if applicable). If you are required to comply with the Part 3.3 turbidity benchmark 2022 Construction General Permit (CGP) Page 45 monitoring requirements, describe the procedures you will follow to collect and evaluate samples, report results to EPA and keep records of monitoring information, and take corrective action when necessary. Include the specific type of turbidity meter you will use for monitoring, as well as any manuals or manufacturer instructions on how to operate and calibrate the meter. Describe any coordinating arrangement you may have with any other permitted operators on the same site with respect to compliance with the turbidity monitoring requirements, including which parties are tasked with specific responsibilities. If EPA has approved of an alternate turbidity benchmark pursuant to Part 3.3.2b, include any data and other documentation you relied on to request use of the specific alternative benchmark. 7.2.9 Compliance with Other Requirements. Threatened and Endangered Species Protection. Include documentation required in the Endangered Species Protection section of the NOI in NeT, or the ESA worksheet in Appendix D, supporting your eligibility with regard to the protection of threatened and endangered species and designated critical habitat. Historic Properties. Include documentation required in Appendix E supporting your eligibility with regard to the protection of historic properties. Safe Drinking Water Act Underground Injection Control (UIC) Requirements for Certain Subsurface Stormwater Controls. If you are using any of the following stormwater controls at your site, document any contact you have had with the applicable State agency91 or EPA Regional Office responsible for implementing the requirements for underground injection wells in the Safe Drinking Water Act and EPA’s implementing regulations at 40 CFR § 144 -147. Such controls would generally be considered Class V UIC wells: 91 For State UIC program contacts, refer to the following EPA website: https://www.epa.gov/uic. Infiltration trenches (if stormwater is directed to any bored, drilled, driven shaft or dug hole that is deeper than its widest surface dimension, or has a subsurface fluid distribution system); Commercially manufactured pre-cast or pre-built proprietary subsurface detention vaults, chambers, or other devices designed to capture and infiltrate stormwater flow; and Drywells, seepage pits, or improved sinkholes (if stormwater is directed to any bored, drilled, driven shaft or dug hole that is deeper than its widest surface dimension, or has a subsurface fluid distribution system). 7.2.10 SWPPP Certification. Your signatory must sign and date your SWPPP in accordance with Appendix G, Part G.11. 7.2.11 Post-Authorization Additions to the SWPPP. Once you are authorized for coverage under this permit, you must include the following documents as part of your SWPPP: A copy of your NOI submitted to EPA along with any correspondence exchanged between you and EPA related to coverage under this permit; A copy of the acknowledgment letter you receive from NeT assigning your NPDES ID (i.e., permit tracking number); 2022 Construction General Permit (CGP) Page 46 A copy of this permit (an electronic copy easily available to the stormwater team is also acceptable). 7.3 ON-SITE AVAILABILITY OF YOUR SWPPP You must keep a current copy of your SWPPP at the site or at an easily accessible location so that it can be made available at the time of an on-site inspection or upon request by EPA; a State, Tribal, or local agency approving stormwater management plans; the operator of a storm sewer system receiving discharges from the site; or representatives of the U.S. Fish and Wildlife Service (USFWS) or the National Marine Fisheries Service (NMFS).92 92 The SWPPP may be prepared, signed, and kept electronically, rather than in paper form, if the records are: (a) in a format that can be read in a similar manner as a paper record; (b) legally dependable with no less evidentiary value than their paper equivalent; and (c) immediately accessible to the inspector during an inspection to the same extent as a paper copy stored at the site would be, if the records were stored in paper form. For additional guidance on the proper practices to follow for the electronic retention of the SWPPP, refer to the Fact Sheet discussion related to Part 4.7.3. EPA may provide access to portions of your SWPPP to a member of the public upon request. Confidential Business Information (CBI) will be withheld from the public, but may not be withheld from EPA, USFWS, or NMFS.93 93 Information covered by a claim of confidentiality will be disclosed by EPA only to the extent of, and by means of, the procedures set forth in 40 CFR part 2, Subpart B. In general, submitted information protected by a business confidentiality claim may be disclosed to other employees, officers, or authorized representatives of the United States concerned with implementing the CWA. The authorized representatives, including employees of other executive branch agencies, may review CBI during the course of reviewing draft regulations. If an on-site location is unavailable to keep the SWPPP when no personnel are present, notice of the plan’s location must be posted near the main entrance of your construction site. 7.4 SWPPP MODIFICATIONS 7.4.1 You must modify your SWPPP, including the site map(s), within seven (7) days of any of the following conditions: Whenever new operators become active in construction activities on your site, or you make changes to your construction plans, stormwater controls, or other activities at your site that are no longer accurately reflected in your SWPPP. This includes changes made in response to corrective actions triggered under Part 5. You do not need to modify your SWPPP if the estimated dates in Part 7.2.3f change during the course of construction; To reflect areas on your site map where operational control has been transferred (and the date of transfer) since initiating permit coverage; If inspections or investigations by EPA or its authorized representatives determine that SWPPP modifications are necessary for compliance with this permit; Where EPA determines it is necessary to install and/or implement additional controls at your site in order to meet the requirements of this permit, the following must be included in your SWPPP: A copy of any correspondence describing such measures and requirements; and 2022 Construction General Permit (CGP) Page 47 A description of the controls that will be used to meet such requirements. To reflect any revisions to applicable Federal, State, Tribal, or local requirements that affect the stormwater controls implemented at the site; and If applicable, if a change in chemical treatment systems or chemically enhanced stormwater control is made, including use of a different treatment chemical, different dosage rate, or different area of application. 7.4.2 You must maintain records showing the dates of all SWPPP modifications. The records must include the name of the person authorizing each change (see Part 7.2.9 above) and a brief summary of all changes. 7.4.3 All modifications made to the SWPPP consistent with Part 7.4 must be authorized by a person identified in Appendix G, Part G.11.b. 7.4.4 Upon determining that a modification to your SWPPP is required, if there are multiple operators covered under this permit, you must immediately notify any operators who may be impacted by the change to the SWPPP. 8 HOW TO TERMINATE COVERAGE Until you terminate coverage under this permit, you must comply with all conditions and effluent limitations in the permit. To terminate permit coverage, you must submit to EPA a complete and accurate Notice of Termination (NOT), which certifies that you have met the requirements for terminating in Part 8. 8.1 MINIMUM INFORMATION REQUIRED IN NOT 8.1.1 NPDES ID (i.e., permit tracking number) provided by EPA when you received coverage under this permit; 8.1.2 Basis for submission of the NOT (see Part 8.2); 8.1.3 Operator contact information; 8.1.4 Name of site and address (or a description of location if no street address is available); and 8.1.5 NOT certification. 8.2 CONDITIONS FOR TERMINATING CGP COVERAGE You may terminate CGP coverage only if one or more of the conditions in Parts 8.2.1, 8.2.2, or 8.2.3 has occurred. Until your termination is effective consistent with Part 8.5, you must continue to comply with the conditions of this permit. 8.2.1 You have completed all construction activities at your site and, if applicable, construction support activities covered by this permit (see Part 1.2.1c), and you have met all of the following requirements: For any areas that (1) were disturbed during construction, (2) are not covered by permanent structures, and (3) over which you had control during the construction activities, you have met the requirements for final vegetative or non-vegetative stabilization in Part 2.2.14c. To document that you have met these stabilization requirements, you must take either ground or aerial photographs that show your site’s compliance with the Part 2.2.14 stabilization requirements and submit them with your NOT. If any portion of your 2022 Construction General Permit (CGP) Page 48 site is covered by one of the exceptions in Part 2.2.14c.iii, indicate which exception applies and include a supplementary explanation with your photographs that provides the necessary context for why this portion of the site is in compliance with the final stabilization criteria even though it appears to be unstabilized. You are not required to take photographs of every distinct part of your site that is being stabilized, however, the conditions of the site portrayed in any photographs that are submitted must be substantially similar94 to those of the areas that are not photographed. You must also comply with the following related to these photographs: 94 Stabilization conditions that are substantially similar would include areas that are using the same type of stabilization measures and that have similar slopes, soils, and topography, and have achieved the same level of stabilization. Take photographs both before and after the site has met the final stabilization criteria in Part 2.2.14c; All photographs must be clear and in focus, and in the original format and resolution; and Include the date each photograph was taken, and a brief description of the area of the site captured by the photograph (e.g., photo shows application of seed and erosion control mats to remaining exposed surfaces on northeast corner of site). You have removed and properly disposed of all construction materials, waste and waste handling devices, and have removed all equipment and vehicles that were used during construction, unless intended for long-term use following your termination of permit coverage; You have removed all stormwater controls that were installed and maintained during construction, except those that are intended for long-term use following your termination of permit coverage or those that are biodegradable (as defined in Appendix A); and You have removed all potential pollutants and pollutant-generating activities associated with construction, unless needed for long-term use following your termination of permit coverage; or 8.2.2 You have transferred control of all areas of the site for which you are responsible under this permit to another operator, and that operator has submitted an NOI and obtained coverage under this permit; or 8.2.3 Coverage under an individual or alternative general NPDES permit has been obtained. 8.3 HOW TO SUBMIT YOUR NOT You must use EPA’s NPDES eReporting Tool (NeT) to electronically prepare and submit an NOT for the 2022 CGP. To access NeT, go to https://cdx.epa.gov/cdx. Waivers from electronic reporting may be granted as specified in Part 1.4.2. If the EPA Regional Office grants you approval to use a paper NOT, and you elect to use it, you must complete the form in Appendix I. 2022 Construction General Permit (CGP) Page 49 8.4 DEADLINE FOR SUBMITTING THE NOT You must submit an NOT within 30 calendar days after any one of the conditions in Part 8.2 occurs. 8.5 EFFECTIVE DATE OF TERMINATION OF COVERAGE Your authorization to discharge under this permit terminates at midnight of the calendar day that a complete NOT is submitted to EPA. 9 PERMIT CONDITIONS APPLICABLE TO SPECIFIC STATES, INDIAN COUNTRY LANDS, OR TERRITORIES The provisions in this Part provide additions to the applicable conditions of this permit to reflect specific additional conditions required as part of the State or Tribal CWA Section 401 certification process, or the Coastal Zone Management Act (CZMA) certification process, or as otherwise established by the permitting authority. The specific additional revisions and requirements only apply to activities in those specific States, Indian country, and areas in certain States with Federal Facilities or areas subject to construction projects by Federal Operators. States, Indian country, and other areas not included in this Part do not have any additions to the applicable conditions of this permit. 9.1 EPA REGION 1 9.1.1 NHR100000 State of New Hampshire Should the permit coverage for an individual applicant be insufficient to achieve water quality standards, the New Hampshire Department of Environmental Services (NHDES) may prepare additional 401 certification conditions for that applicant. Any additional 401 certification conditions will follow all required NHDES public participation requirements. If you disturb 100,000 square feet or more of contiguous area, you must also comply with RSA 485-A:17 and Env-Wq 1500, and, unless exempt, apply for an Alteration of Terrain (AoT) permit from NHDES. This requirement also applies to a lower disturbance threshold of 50,000 square feet or more when construction occurs within the protected shoreline under the Shoreland Water Quality Protection Act (see RSA 483-B and Env-Wq 1400). A permit application must also be filed if your project disturbs an area of greater than 2,500 square feet, is within 50 feet of any surface water, and has a flow path of 50 feet or longer disturbing a grade of 25 percent or greater. Project sites with disturbances smaller than those discussed above, that have the potential to adversely affect state surface waters, are subject to the conditions of an AoT General Permit by Rule (Env-Wq 1503.03). You must determine that any excavation dewatering discharges are not contaminated before they will be authorized as an allowable non-stormwater discharge under this permit (see Part 1.2.2 of the Construction General Permit or CGP). In the absence of information demonstrating otherwise, the water is considered uncontaminated if there is no groundwater contamination within 1,000 feet of the groundwater dewatering location. Information on groundwater contamination can be generated over the Internet via the NHDES web site http:// des.nh.gov/ by using the One Stop Data Mapper. For a toxic substance included in the New Hampshire surface water quality standards, see Env-Wq 1703.21 (see https://www.des.nh.gov/sites/g/fi1es/ehbemt 341/files/documents/2020-01/Env-Wg 2022 Construction General Permit (CGP) Page 50 1700.pdf). If it is determined that the groundwater to be dewatered is near a remediation or other waste site, you must apply for the Remediation General Permit (see https://www3.epa.gov/region1/npdes/rgp.html) As a minimum, you must treat any uncontaminated excavation "dewatering" discharges and "stormwater" discharges, as those terms are defined in Appendix A of the CGP, as necessary, to remove suspended solids and turbidity so that the surface waters receiving the construction discharges95 meet New Hampshire surface water quality standards for turbidity (Env-Wq 1703.11 and Env-Wq 1703.03(c)(1)c), benthic deposits (Env-Wq 1703.03(c)(1)a), and Env-Wq 1703.08) and foam, debris, scum or other visible substances (i.e., plumes or visual turbidity)96 (Env-Wq 1703.03(c)(1)b). 95 Construction Discharges include uncontaminated "dewatering" and "stormwater" discharges as those terms are defined in Appendix A of the CGP. Controlled construction discharges are construction discharges where the rate of flow can be regulated such as from a construction settling basin or NHDES approved flocculation system. 96 For the definition of visual turbidity, see the definition for "Non-Turbid" in Appendix A of the CGP, which states the following:" "Non-Turbid" - a discharge that is free from visual turbidity. For the purposes of this permit, visual turbidity refers to a sediment plume or other cloudiness in the water caused by sediment that can be identified by an observer." [EPA interprets the text of this footnote as intending to reference the Appendix A definitions of “visual turbidity” and “non-turbid” in the final permit.] For all Construction Activities covered under this CGP, the following shall apply to ensure compliance with the aforementioned regulations for turbidity, benthic deposits and visible substances: Unless otherwise specified, site inspection requirements shall comply with Part 4 of the CGP. As a minimum site inspection frequency shall be in accordance with Part 4.2.2 of the CGP (and Part 4.3.2 of the CGP for sites discharging dewatering water). Site inspection frequency may be reduced in accordance with Part 4.4 of the CGP (Reductions in Inspection Frequency). Monitoring of the receiving water for visible turbidity and benthic sediment deposits shall be conducted each site inspection and results reported in the Inspection Report required in Part 4.7 of the CGP. Should visible turbidity or benthic sediment deposits attributable or partly attributable to your construction activities be present in the receiving water, the "Corrective Actions" specified in Part 5 shall be immediately implemented to correct the water quality standard violations. In addition, daily monitoring (including photographs) of the receiving water shall be conducted until there is no visible turbidity or benthic deposits. Inspection Reports required in Part 4.7 of the CGP shall include, but not be limited to, the distance downstream and the percent of the river width97 where visible turbidity was observed, and the period of time that the visible turbidity persisted. A copy of the Inspection Report(s) shall be made available to NHDES within 24 hours of receiving a written request from NHDES. 97 The distance downstream and the percent of river width where visible turbidity (i.e., plume) is observed is required to determine the extent of the river affected and to determine if there was a "zone of passage" (i.e., a portion of the receiving water where there was no visible turbidity where mobile organisms could pass without being adversely impacted). The percent of river width affected is equal 100 multiplied by the width of the plume (in feet) divided by the width of the receiving water (in feet). For Construction Activities, disturbing 5 acres or more of land at any one time (excluding areas that have been completely stabilized in accordance with the final stabilization criteria specified in Part 2.2.14.c of the CGP), the following shall 2022 Construction General Permit (CGP) Page 51 apply to ensure compliance with the aforementioned regulations for turbidity, benthic deposits and visible substances. Item 9.1.1.d.i) above shall apply to all construction discharges and the minimum site inspection frequency shall comply with Part 4.3.1 of the CGP (and Part 4.3.2 of the CGP for sites discharging dewatering water). Site inspection frequency may be reduced in accordance with Part 4.4 of the CGP (Reductions in Inspection Frequency). With regards to controlled construction discharges, if there is no visible turbidity (i.e., plumes) or benthic deposits, and, in the absence of information demonstrating otherwise, turbidity measurements of less than or equal to 50 nephelometric turbidity units (NTU) in the controlled construction discharges at the outlet prior to mixing with the receiving surface waters, shall be presumed to meet New Hampshire surface water quality standards for the parameters listed above. As a minimum, the controlled construction discharges must be sampled at each site inspection. If any controlled construction discharge exceeds 50 NTU, or if visible turbidity or benthic sediment deposits attributable or partly attributable to any construction discharge are observed in the receiving water, then the "Corrective Actions" specified in Part 5 of the CGP shall be immediately implemented. In addition, should such violation occur, and, in order to determine compliance with surface water quality standards for turbidity (Env-Wq 1703.11 and Env-Wq 1703.03(c)(1)c), benthic deposits (Env-Wq 1703.03(c)(1)a), and Env-Wq 1703.08) and foam, debris, scum or other visible substances (Env-Wq 1703.03(c)(1)b)), turbidity monitoring shall be immediately implemented as specified below: Turbidity samples of the receiving water shall be immediately taken in the receiving water upstream and beyond the influence of the construction activity, and, unless a mixing zone98 is approved by NHDES, no more than 75 feet downstream of each controlled construction discharge that exceeded 50 NTU and no more than 75 feet downstream of each construction discharge that caused visible turbidity. 98 Permittees may request a distance greater than 75 feet downstream of a construction discharge for determining compliance with turbidity standards in Class B surface waters, by submitting a mixing zone request to NHDES that complies with Env-Wq 1707.02. If a mixing zone is approved, NHDES is required to include conditions to ensure that the criteria on which the approval is based are met (Env-Wq 1707.03). Downstream samples shall be taken at locations in the receiving water that are most likely influenced by the discharge (e.g., if visible turbidity (i.e., a plume) is present, the sample shall be taken in the plume). Samples shall be collected a minimum of 2 times per day during the daylight hours at times when construction activities are most likely to cause turbidity in the receiving water and shall continue until the turbidity water quality standards are met in the receiving water (i.e., the difference between the upstream and downstream turbidity level is no greater than 10 NTU). 2022 Construction General Permit (CGP) Page 52 If water quality standards are not met during daylight hours on any day, sampling shall resume the next day and continue no fewer than 2 times per day until water quality standards are met. The date, time, location and results of turbidity measurements, as well as a summary identifying the cause of the violations, corrective actions that were implemented, the period of time that the receiving water exceeded turbidity standards and the distance downstream and the percent of the river width where visible turbidity was observed, and the period of time that the visible turbidity persisted, shall be recorded and included in the Inspection Report required in Part 4.7 of the CGP. Turbidity measurements shall be conducted via a field meter in accordance with the requirements for turbidity specified in Table 1B in 40 CFR 136.3 (see 40 CFR §136.3 Identification of test procedures - Code of Federal Regulations ecfr.io). Field meters shall be calibrated every day sampling is conducted and prior to the first sample. Construction site owners and operators are encouraged to consider opportunities for post- construction groundwater recharge using infiltration best management practices (BMPs) during site design and preparation of the SWPPP in order to assure compliance with Env-Wq 1703.03 and Env-Wq 1703.11. If your construction site is in a town that is required to obtain coverage under the NPDES General Permit for discharges from Municipal Separate Storm Sewer Systems (MS4) you may be required to use such practices. The SWPPP must include a description of any on-site infiltration that will be installed as a post-construction stormwater management measure or reasons for not employing such measures such as 1) The facility is located in a wellhead protection area as defined in RSA 485- C:2; or 2) The facility is located in an area where groundwater has been reclassified to GAA, GA1 or GA2 pursuant to RSA 485-C and Env-DW 901; or 3) Any areas that would be exempt from the groundwater recharge requirements contained in Env-Wq 1507.04, including all land uses or activities considered to be a "High-load Area" (see Env-Wq 1502.30). For design considerations for infiltration measures see Env-Wq 1508.06. Note that there may be additional local requirements that fall under the NH MS4 permittee's Authorization to Discharge Permit for those regulated areas. Appendix F of the CGP contains information regarding Tier 2, or high quality waters in the various states. [EPA notes that this information has now been moved to https://www.epa.gov/npdes/construction-general-permit-resources-tools-and- templates] Although there is no official list of tier 2 waters for New Hampshire, it can be assumed that all New Hampshire surface waters are tier 2 for turbidity unless 1) the surface water that you are proposing to discharge into is listed as impaired for turbidity in the states listing of impaired waters (see https://nhdes-surface-water- quality-assessment-site-nhdes.hub.arcgis.com/) or 2) sampling upstream of the proposed discharge location shows turbidity values greater than 10 NTU (Env-Wq 1703.11). A single grab sample collected during dry weather (no precipitation within 48 hours) is acceptable. To ensure compliance with RSA 485-C, RSA 485-A, RSA 485-A:13, l(a), Env-Wq 1700 and Env-Wq 302, the following information may be requested by NHDES. This information must be kept on site unless you receive a written request from NHDES that it be sent to the address shown below in 9.1.1.h. 2022 Construction General Permit (CGP) Page 53 A list of all non-stormwater discharges that occur at the facility, including their source locations and the control measures being used (see Part 1.2.2 of the CGP). Records of sampling and analysis required for construction dewatering and stormwater discharges (see 9.1.1.d above). All required or requested documents must be sent to: NH Department of Environmental Services, Watershed Management Bureau, P.O. Box 95 Concord, NH 03302-0095. 9.1.2 MAR100000 Commonwealth of Massachusetts (except Indian country) All discharges covered by the Construction General Permit shall comply with the provisions pursuant to 314 CMR 3.00, 314 CMR 4.00, 314 CMR 9.00, including applicable construction stormwater standards and 310 CMR 10.00. Pursuant to 314 CMR 3.11 (2)(a)6., and in accordance with MassDEP’s obligation under 314 CMR 4.05(5)(e) to maintain surface waters free from pollutants in concentrations or combinations that are toxic to humans, aquatic life, or wildlife, permittees are prohibited from discharging dewatering water under the CGP from sites that are designated as Superfund/CERCLA or RCRA, and must make accommodations to dispose of the dewatering discharges appropriately, such as coverage under the Remediation General Permit (RGP). Pursuant to 314 CMR 3.11 (2)(a), and in accordance with MassDEP’s obligation to protect Outstanding Resource Waters under 314 CMR 4.04(3), applicants seeking coverage under the 2022 CGP that propose to carry out construction activities near Outstanding Resource Waters as identified in 314 CMR 4.06, shall submit to MassDEP for review: a copy of the Stormwater Pollution Prevention Plan (SWPPP), a copy of the EPA NOI, and MassDEP’s Stormwater BMP Checklist. For purposes of this review, the permittee shall submit these documents to MassDEP at the same time they are submitted to EPA. Instructions on how to submit these documents to MassDEP and where to find the MassDEP Stormwater BMP Checklist and obtain authorization to discharge can be found here: https://www.mass.gov/how-to/wm-15-npdes-general-permit- notice-of- intent. Pursuant to 314 CMR 3.11 (2)(a)6., and in accordance with MassDEP’s obligation under 314 CMR 4.05(5)(e) to maintain surface waters free from pollutants in concentrations or combinations that are toxic to humans, aquatic life, or wildlife, applicants that propose to dewater under the 2022 CGP and plan to discharge to certain waters as described below, shall determine that any dewatering discharges are not contaminated by testing the proposed discharge as described below as part of the application for WM15 authorization. Unless otherwise specified, testing described in this section should be conducted using the methods in 40 CFR 136. Applicants for sites that plan to discharge to Outstanding Resource Waters as identified in 314 CMR 4.06 shall test one sample of the proposed dewatering discharge water for pH, E. Coli (for discharges to freshwater), fecal coliform (for 2022 Construction General Permit (CGP) Page 54 discharges to salt water), Enterococci (for discharges to salt water), total suspended solids, oil and grease, total nitrogen, total phosphorus, and all parameters with numeric criteria listed in the Massachusetts Surface Water Quality Standards at 314 CMR 4.05(e). Results shall be reported to MassDEP as part of the WM15 application. To determine if the dewatering discharge could be covered under the 2022 CGP, the effluent at zero dilution must meet numeric water quality criteria. If the effluent does not meet numeric water quality criteria, the applicant shall contact EPA Region 1 to discuss coverage under the Remediation General Permit. Applicants for sites that propose to discharge to Public Water Supplies (314 CMR 4.06(1)(d)1) shall also test one sample of the proposed dewatering discharge water for per- and polyfluoroalkyl substances (PFAS), as outlined in the table below. Results shall be reported to MassDEP as part of the WM15 application. If any PFAS compounds are detected, the applicant shall apply for coverage under the NPDES Remediation General Permit for Massachusetts if required. PFAS Testing Parameters for Discharges to Public Drinking Water Supplies99 Perfluorohexanesulfonic acid (PFHxS), grab Report ng/L Perfluoroheptanoic acid (PFHpA), grab Report ng/L Perfluorononanoic acid (PFNA), grab Report ng/L Perfluorooctanesulfonic acid (PFOS), grab Report ng/L Perfluorooctanoic acid (PFOA), grab Report ng/L Perfluorodecanoic acid (PFDA), grab Report ng/L 99 PFAS testing shall follow established EPA methods 537 or 537.1 for drinking water until EPA Method 3512 for non- potable water becomes available. Applicants for sites that propose to discharge to an impaired water as identified in the most recent final Massachusetts Integrated List of Waters, shall test one sample of the proposed dewatering discharge water for the parameter(s) for which the waterbody is impaired. To determine if the dewatering discharge could be covered under the 2022 CGP, the effluent at zero dilution must meet numeric water quality criteria. If the effluent does not meet numeric water quality criteria, the applicant shall contact EPA Region 1 to discuss coverage under the Remediation General Permit and shall apply for RGP coverage if required. For dewatering discharges to all other waters, if any pollutants are known or believed present in the proposed dewatering discharge water, the applicant shall apply for coverage under the NPDES Remediation General Permit for Massachusetts if required. For the purposes of this condition, a pollutant is “known present” if measured above the analytical detection limit using a sufficiently sensitive test method in an environmental sample, and “believed present” if a pollutant has not been measured in an environmental sample but will be added or generated prior to discharge, such as through a treatment process. Consequently, a pollutant is “known absent” if measured as non-detect relative to the analytical detection limit using a sufficiently sensitive test method in an environmental sample, and “believed absent” if a pollutant has not been measured in an environmental sample but will not be added or generated prior to discharge and is not a parameter that applies to the applicable activity category for a site. If any pollutants are known or believed present in the 2022 Construction General Permit (CGP) Page 55 proposed dewatering discharge water, the applicant shall test one sample of the proposed dewatering discharge water for the pollutants known or believed to be present. To determine if the dewatering discharge could be covered under the 2022 CGP, the effluent at zero dilution must meet numeric water quality criteria. If the effluent does not meet numeric water quality criteria, the applicant shall contact EPA Region 1 to discuss coverage under the Remediation General Permit. Pursuant to 314 CMR 3.11 (2)(a), and in accordance with MassDEP’s obligation to protect Outstanding Resource Waters under 314 CMR 4.04(3), applicants that propose to dewater under the 2022 CGP and discharge to Outstanding Resource Waters as identified in 314 CMR 4.06, shall submit the SWPPP and associated documents to MassDEP to review. MassDEP shall complete review within 30 days of receipt. Pursuant to 314 CMR 3.11 (2)(a)6., and in accordance with MassDEP’s obligation under 314 CMR 4.05 to maintain surface waters free from color and turbidity in concentrations or combinations that are aesthetically objectionable or would impair any use assigned to the waterbody, permittees that have been authorized to dewater under the 2022 CGP and that discharge to Outstanding Resource Waters as identified in 314 CMR 4.06 shall carry out daily benchmark monitoring for turbidity100 for the duration of dewatering. Permittees shall compare the weekly average of the turbidity monitoring results with the established benchmark turbidity value of 25 Nephelometric Turbidity Units (NTU). If a permittee’s weekly average turbidity results exceed the benchmark, the operator shall conduct follow-up corrective action to determine the source of the problem and to make any necessary repairs or upgrades to the dewatering controls to lower the turbidity levels. The permittee shall document any corrective action taken in its corrective action log. Furthermore, permittees at these sites shall carry out inspections at higher frequency, specifically, daily inspections of the dewatering discharge treatment for the duration of the discharge. The permittee shall inspect the site for sediment plume or whether a hydrocarbon sheen is visible at the point of discharge, estimate the flow rate at the point of discharge, and inspect the site downstream to assess whether sedimentation is attributable to the dewatering discharges. 100 Applicants shall follow EPA Method 180.1 to monitor for turbidity Pursuant to 314 CMR 3.11 (2)(a)6., and in accordance with MassDEP’s obligation under 314 CMR 4.05 to maintain surface waters free from color and turbidity in concentrations or combinations that are aesthetically objectionable or would impair any use assigned to the waterbody, permittees shall store materials outside the Base Flood Elevation101 when feasible to prevent displacing runoff and erosion. 101 Base Flood Elevation (BFE) is the elevation of surface water resulting from a flood that has a 1% chance of equaling or exceeding that level in any given year. The BFE is shown on the Flood Insurance Rate Map (FIRM) for zones AE, AH, A1–A30, AR, AR/A, AR/AE, AR/A1– A30, AR/AH, AR/AO, V1–V30 and VE. (Source: https://www.fema.gov/node/404233). Pursuant to 314 CMR 3.11 (2)(a), and in accordance with MassDEP’s obligation to maintain surface waters free from nutrients in concentrations that would cause or contribute to impairment of existing or designated uses under 314 CMR 4.05(5)(c), all applicants who apply for coverage under the 2022 CGP shall follow guidelines on fertilizer application, including use of fertilizer containing no phosphorus, in accordance with 330 CMR 31.00 Plant Nutrient Application Requirements for 2022 Construction General Permit (CGP) Page 56 Agricultural Land and Non-Agricultural Turf and Lawns. Further, fertilizer shall never be applied to a site when a rain event greater than 0.5 inches is forecast in the next 48 hours. Pursuant to 314 CMR 3.11 (2)(a), all applicants who apply for coverage under the 2022 CGP and elect to carry out site inspections every 14 days shall also inspect sites within 24 hours of 0.25 inches of precipitation events or greater over 24 hours, or within 24 hours of a discharge that occurred due to snowmelt from 3.25 inches or greater of snow accumulation.102 During the high flow periods in spring (i.e., months of April to June), inspection frequency shall be increased to once per week for all sites. 102 This is the amount of snow that is equivalent to 0.25 inches of rain, based on information from the National Oceanic and Atmospheric Administration (NOAA) indicating that 13 inches of snow is, on average, equivalent to 1 inch of rain. See https://www.nssl.noaa.gov/education/svrwx101/winter/faq/. To determine whether 3.25 inches or greater of snow accumulation has occurred at a site, snowfall measurements can be taken at the site,103 or the operator can rely on similar information from a local weather forecast. 103 NOAA’s National Weather Service has guidelines on snowfall measurements at https://www.weather.gov/jkl/snow_measurement. These guidelines recommend use of a “snowboard” (a piece of wood about 16 inches by 16 inches) that is placed in an unobstructed part of the site on a hard surface. Implementing structural improvements, enhanced/resilient pollution prevention measures, and other mitigation measures can help to minimize impacts from stormwater discharges from major storm events such as hurricanes, storm surge, extreme/heavy precipitation,104 and flood events. Pursuant to 314 CMR 3.11 (2)(a), if such stormwater control measures are already in place due to existing requirements mandated by other state, local or federal agencies, the SWPPP shall include a brief description of the controls and a reference to the existing requirement(s). If the site may be exposed to or has previously experienced such major storm events105, additional stormwater control measures that may be considered, and implemented as necessary, include, but are not limited to: 104 Heavy precipitation refers to instances during which the amount of rain or snow experienced in a location substantially exceeds what is normal. What constitutes a period of heavy precipitation varies according to location and season. Heavy precipitation does not necessarily mean the total amount of precipitation at a location has increased— just that precipitation is occurring in more intense or more frequent events. 105 To determine if your facility is susceptible to an increased frequency of major storm events that could impact the discharge of pollutants in stormwater, you may reference FEMA, NOAA, or USGS flood map products at https://www.usgs.gov/faqs/where-can-i-find-flood-maps?qt- news_science_products=0#qtnews_science_products. Reinforce materials storage structures to withstand flooding and additional exertion of force; Prevent floating of semi-stationary structures by elevating to the Base Flood Elevation (BFE) level or securing with non-corrosive device; When a delivery of exposed materials is expected, and a storm is anticipated within 48 hours, delay delivery until after the storm or store materials as appropriate (refer to emergency procedures); 2022 Construction General Permit (CGP) Page 57 Temporarily store materials and waste above the Base Flood Elevation [EPA notes that it has deleted a footnote reference to the term “Base Flood Elevation” since the same footnote is already included in Part 9.1.2.g, above.] level; Temporarily reduce or eliminate outdoor storage; Temporarily relocate any mobile vehicles and equipment to higher ground; Develop scenario-based emergency procedures for major storms that are complementary to regular stormwater pollution prevention planning and identify emergency contacts for staff and contractors; and Conduct staff training for implementing your emergency procedures at regular intervals. Pursuant to 314 CMR 3.11 (2)(a)6., and in accordance with MassDEP’s obligation under 314 CMR 4.05(5)(e) to maintain surface waters free from pollutants in concentrations or combinations that are toxic to humans, aquatic life, or wildlife, permittees who seek coverage under the 2022 CGP and anticipate to carry out dust control shall limit their dust control methodology to using water only and specifically avoid using other techniques, such as solutions containing calcium chloride. If MassDEP requests a copy of the Stormwater Pollution Prevention Plan (SWPPP) for any construction site at any time, the permittee shall submit the SWPPP to MassDEP within 14 days of such a request. MassDEP may conduct an inspection of any site covered by this permit to ensure compliance with state law requirements, including state water quality standards. 9.1.3 MTR10F000 Areas in the State of Vermont located at a federal facility Earth disturbance at any one time is limited to five acres. All areas of earth disturbance must have temporary or final stabilization within 14 days of the initial disturbance. After this time, disturbed areas must be temporarily or permanently stabilized in advance of any runoff producing event. A runoff producing event is an event that produces runoff from the construction site. Temporary stabilization is not required if precipitation is not forecast and work is to continue in the next 24-hours or if the work is occurring in a self-contained excavation (i.e. no outlet) with a depth of two feet or greater (e.g. house foundation excavation, utility trenches). Areas of a construction site that drain to sediment basins are not considered eligible for this exemption, and the exemption applies only to the excavated area itself. Site inspections on active construction sites shall be conducted daily during the period from October 15 through April 15. The use of chemical treatments (e.g. polymers, flocculants, and coagulants) for the settling and/or removal of sediment from stormwater runoff associated with construction and construction-related activities requires prior written approval and an approved site and project-specific plan, from the Vermont Agency of Natural Resources. In addition, the use of cationic polymers is prohibited unless approved by the Vermont Agency of Natural Resources under a site and project-specific plan. Any applicant under EPA’s CGP shall allow authorized Vermont Agency of Natural Resources representatives, at reasonable times and upon presentation of credentials, to enter upon the project site for purposes of inspecting the project and determining 2022 Construction General Permit (CGP) Page 58 compliance with this Certification. The Vermont Agency of Natural Resources may reopen and alter or amend the conditions of this Certification over the life of the EPA 2022 Construction General Permit when such action is necessary to assure compliance with the VWQS. 9.2 EPA REGION 2 9.2.1 NYR10I000 Indian country within the State of New York Saint Regis Mohawk Tribe Any Responsible-Person/Decision-Maker required under the CGP to submit a Notice of lntent (NOI) to EPA for coverage under the CGP, must concurrently submit an electronic copy of the NOI to the SRMT Environmental Division, Water Resource Program Manager. Additionally, an electronic copy of the Notice of Termination (NOT) must be provided within three business days after electronic confirmation is received from EPA that the NOT has been accepted. The NOI and NOT must be electronically provided to the following addresses: Mr. Tieman W. Smith Water Resources Program Manager Saint Regis Mohawk Tribe 449 Frogtown Road Akwesasne, NY 13655 Tiernan.Smith@srmt-nsn.gov 518.358.2272 ext. 5073 Any Responsible-Person/Decision-Maker that is required as part of the CGP to prepare a Discharge Management Plan (OMP) or Storm Water Management Plan (SWMP) and/or Storm Water Pollution Prevention Plan (SWPPP) must submit an electronic copy of the DMP, SWMP and/or SWPPP to the SRMT Environment Division, Water Resources Program Manager IO business days prior to the start of construction of any work to be conducted under the CGP. The applicable documents must be provided to the electronic address listed above. Any Responsible-Person/Decision-Maker that is required under the CGP to submit an annual report to EPA must submit an electronic copy of the annual report concurrently to the SRMT Water Resource Program. Additionally, any correspondences between the applicant and EPA related to analytical data, written reports, corrective action, enforcement, monitoring, or an adverse incident must likewise be routed to the SRMT Water Resources Program at the above electronic address. An "Authorization to Proceed Letter" with site-specific mitigation requirements may be sent out to the permittee when a review of the NOI and OMP, SWMP and /or SWPPP on a case-by-case basis, is completed by the SRMT Environment Division, Water Resource Program. This approval will allow the application to proceed if all mitigation requirements are met. Seneca Nation Under Part 1.1.5 of the CGP, the Seneca Nation requests that an applicant must demonstrate that they meet the eligibility criteria listed in Appendix D (certify in your Notice of lntent (NOI) that you meet one of the eligibility criteria [Criterion A- F]) as well as species and critical habitats that are listed under the Seneca Nation's "Fishing and Conservation Laws" and the "Seneca Nation of Indians Comprehensive Conservation Law". 2022 Construction General Permit (CGP) Page 59 The Tribal Historic Preservation Office (THPO) was established in 2000 after the Seneca Nation received a recognition letter from the National Park Service (NPS); therefore under Part 1.1.6 of the CGP (Appendix E) and prior to submitting a Notice of Intent (NOI) operators must complete the Nation's TPHO, Project Review Form (https://sni.org/media/246603/sni-thpo-project-review-form.pdf) and submit the completed form with associated information to the Tribal Historic Preservation Officer at 90 Ohi:yo' Way, Salamanca, NY 14779. Federal agencies engaging in construction activities must provide for construction review by a certified construction reviewer in accordance with 7 Del. C. §§4010 & 4013 and 7 DE Admin. Code 5101, subsection 6.1.6. Under Part 1.2 of the CGP, discharges must also follow the Section 13 of the Guide for Construction (Seneca Nation of Indians Source Water Code) and respectively, Council Resolution, dated April 13, 2013 (CN: R-04-13-13-11) to ensure that the health, safety and welfare of the citizens of the Seneca Nation, and all other within the Lands and Territories of the Seneca Nation of Indians, and to facilitate the adequate provisions of water through the elimination or prevention of ground water contamination in the vicinity of wells that supply drinking water for the Nation. The area is known as the Source Water Protection Area (SWPA) and specified activities are regulated within this SWPA, as cited in Section 13 of the Guide for Construction and Section VI, of CN: R-04-13-13-11. Under Part 1.4, any operator who seeks coverage of the CGP, and is required to submit a notice of intent NOI and Notice of Termination (NOT) (as necessary) to the EPA for coverage, under Part 1.4.2 must also submit a copy of the NOI to the Seneca Nation's Environmental Protection Department (EPD) within three business days of submittal to the EPA, (address shown below). Respectively, a copy of the NOT (as described under Part 8.3 of the CGP), which certifies that you have met the requirements of Part 8, must be provided within three business days after electronic confirmation is received from the EPA that the NOT has been accepted. In addition to a NOI and NOT, the Seneca Nation (Environmental Protection Department [EPD]) would require an Environmental Impact Assessment (EA) (Long Form), as shown in Section 2 of the Seneca Nation of Indians Laws, Ordinances & Policies (Guide for Construction), to be completed and submitted to the EPD prior to any project to determine whether the impacts from a project would create significant and detrimental effects to the Nation's lands, water (violate WQS), and environment. The NOI, NOT, and EA must be submitted electronically to epd@sni.org and provided to the following address: Seneca Nation Environmental Protection Department (EPD) Attn: Director of EPD 12837 Route 438 Irving, NY 14081 Under Part 3.0 of the CGP, discharges must be controlled as necessary to meet applicable WQS. The Seneca Nation is working actively towards finalizing and implementing the; therefore, the EPD would require an applicant to submit or grant access to the permit to obtain information on the impact of effluents on receiving waters, including the capability of receiving waters to support future designated uses and achieve the WQS of the Nation; and to advise prospective dischargers of discharge requirements, and coordinate with the appropriate 2022 Construction General Permit (CGP) Page 60 permitting agencies. As stated in the Decision Document, under Section 303(c) of the CWA, 33 U.S.C. § 1313(c), states develop, review, and revise (as appropriate) water quality standards for surface waters of the United States. At a minimum, such standards are to include designated water uses, water quality criteria to protect such uses, and an antidegradation policy. 40 C.F.R. § 131.6. In addition, under Section 401 of the CWA states may grant, condition, or deny "certification" for federally permitted or licensed activities that may result in a discharge to the waters of the United States 33 U.S.C. § 1341. Under Part 7.2.8(a)(b)(c) and for Part 9 of the CGP, the following Sections of the Seneca Nation's Guide for Construction shall be considered, in conjunction with the CGP: (a) Section 1. Executive Order - To Establish a Policy for Governing Access to Nation Territories and Facilities by Officials of Foreign Government, dated March 31, 2011 (b) Section 3. Natural Resources Committee, Sand and Gravel Law (CN: R-06-24- 05-08) (c) Section 4. Fishing and Conservation Laws - Part 1.1.5 of the CGP (d) Section 5. Seneca Nation of lndians Comprehensive Conservation Law, adopted January 14, 2012 (e) Section 9. Food is Our Medicine (FIOM) Program/Native Planting Policy (CN: R- 03- 08-14-14) (f) Section 10. Forestry Management Plan (CN: R-08-14-10-23) (g) Section 11. Timber Ordinance #411-092, dated May 8, 1982 (h) Section 14. Flood Damage Prevention Local Law, dated September 27, 1988 (i) Section 16. Utilities Ordinance No. 87-100 (j) Authorizing Emergency Action and Contingency Plan to Restrain Pollution of Nations Waters, (Council Resolution: R-03-01-18-10), dated March 10, 2018 Seneca Nation of Indians Permit Application for Construction within Waterways Permit, Form NR98-01.00 9.3 EPA REGION 3 9.3.1 DCR100000 District of Columbia Discharges authorized by this permit shall comply with the District of Columbia Water Pollution Control Act of 1984, as amended (DC Official Code § 8-103.01 and § 8- 103.06, et seq.) to ensure that District of Columbia waters, waters in adjacent and downstream states, and the beneficial uses of these waters will not be harmed or degraded by the discharges. Discharges authorized by this permit must comply with §§ 1104.1 and 1104.8 of Chapter 11 and the provisions of Chapter 19 of Title 21of District of Columbia Municipal Regulations in order to attain and maintain designated uses of the District of Columbia waters. 2022 Construction General Permit (CGP) Page 61 The permittee shall comply with the District of Columbia Stormwater Management and Soil Erosion and Sediment Control regulations in Chapter 5 of Title 21 of the District of Columbia Municipal Regulations. The permittee shall comply with the District of Columbia Flood Management Control regulations in Chapter 31 of Title 20 of the District of Columbia Municipal Regulations. The permittee shall submit a copy of the Stormwater Pollution Prevention Plan (SWPPP) to the Regulatory Review Division, Department of Energy & Environment, Government of the District of Columbia, 1200 First Street, NE, 5th Floor, Washington, DC 20002, during the review and approval of the permittee’s DOEE Erosion and Sediment Control Plan in accordance with the provisions of Chapter 542 of Title 21 of the District of Columbia Municipal Regulations. Upon request, the permittee shall submit all inspection and monitoring reports as required by this permit and 40 CFR § 122.41 to the Associate Director, Inspection and Enforcement Division, Department of Energy & Environment, Government of the District of Columbia, 1200 First Street, NE, 5th Floor, Washington, DC 20002; telephone (202) 535-2226, or by email at Joshua.Rodriguez@dc.gov. In the event the permittee intends to discharge dewatering water, groundwater, or groundwater comingled with stormwater from a known contaminated site, the permittee shall contact the Regulatory Review Division, Department of Energy & Environment, Government of the District of Columbia, 1200 First Street, NE, 5th Floor, Washington, DC 20002; telephone (202) 535-2600, or by email at MS4DischargeAuthorization@dc.gov to request authorization to discharge dewatering water, groundwater, or groundwater comingled with stormwater to the District’s Municipal Separate Storm Sewer System (MS4) or to a surface water body pursuant to §§ 8-103.02, 8-103.06, and 8-103.07 of the District of Columbia Water Pollution Control Act of 1984, as amended. 9.3.2 DER10F000 Areas in the State of Delaware located at a federal facility (as defined in Appendix A) Federal agencies must submit a sediment and stormwater management plan (SSMP) and receive Department approval prior to undertaking any land clearing, soil movement or construction activity unless conducting an exempt activity. Federal construction activities are required to have a third-party Certified Construction Reviewer (CCR) perform weekly reviews to ensure the adequacy of construction activities pursuant to the approved SSMP and regulations. Implementation of approved SSMPs requires the daily oversight of construction activity by certified responsible personnel. Implementation of approved SSMPs requires the daily oversight of construction activity by certified responsible personnel. A current copy of the SSMP must be maintained at the construction site. Unless authorized by the Department, not more than 20 acres may be disturbed at any one time. 9.4 EPA REGION 4 No additional conditions 2022 Construction General Permit (CGP) Page 62 9.5 EPA REGION 5 9.5.1 MIR10I000 Indian country within the State of Minnesota Fond du Lac Reservation New dischargers wishing to discharge to an Outstanding Reservation Resource Water (ORRW)106 must obtain an individual permit from EPA for storm water discharges from large and small construction activities. 106 Although additional waters may be designated in the future, currently Perch Lake, Rice Portage Lake, Miller Lake, Deadfish Lake, and Jaskari Lake are designated as ORRWs. A copy of the Storm Water Pollution Prevention Plan (SWPPP) must be submitted to the Office of Water Protection at least fifteen (15) days in advance of sending the Notice of Intent to EPA. The SWPPP can be submitted electronically to richardgitar@FDLREZ.com or by hardcopy sent to: Fond du Lac Reservation Office of Water Protection 1720 Big Lake Road Cloquet, MN 55720 Copies of the Notice of Intent (NOI) and the Notice of Termination (NOT) must be sent to the Fond du Lac Office of Water Protection at the same time they are submitted to EPA. [The condition helps the Office of Water Protection keep track of when a project is about to start and when it has ended. FDL Water Quality Certification Ordinance, Section 204 (a) (2)). If the project will entail a discharge to any watercourse or open water body, the turbidity limit shall NOT exceed 10% of natural background within the receiving water(s) as determined by Office of Water Protection staff. For such discharges, turbidity sampling must take place within 24 hours of a ½-inch or greater rainfall event. The results of the sampling must be reported to the Office of Water Protection within 7 days of the sample collection. All sample reporting must include the date and time, location (GPS: UTM/Zone 15), and NTU. CGP applicants are encouraged to work with the Office of Water Protection in determining the most appropriate location(s) for sampling. [This condition helps both the Office of Water Protection and the project proponent in knowing whether or not their erosion control efforts are effective. FDL Water Quality Certification, Section 204 (b) (1)). Receiving waters with open water must be sampled for turbidity prior to any authorized discharge as determined by Office of Water Protection staff. This requirement only applies to receiving waters which no ambient turbidity data exists. [This condition allows the Office of Water Protection to obtain a baseline turbidity sample in which to compare to other samples. FDL Water Quality Certification Ordinance, Section 204 (b) (2)]. All work shall be carried out in such a manner as will prevent violations of water quality criteria as stated in the Water Quality Standards of the Fond du Lac Reservation, Ordinance #12/98, as amended. This includes, but is not limited to, the prevention of any discharge that causes a condition in which visible solids, bottom deposits, or turbidity impairs the usefulness of water of the Fond du Lac 2022 Construction General Permit (CGP) Page 63 Reservation for any of the uses designated in the Water Quality Standards of the Fond du Lac Reservation. These uses include wildlife, aquatic life, warm water fisheries, cold water fisheries, subsistence fishing (netting), primary contact recreation, secondary contact recreation, cultural, wild rice areas, aesthetic waters, agriculture, navigation, commercial and wetlands. It also includes the designated uses of wetlands including, but not limited to, baseflow discharge, cultural opportunities, flood flow attenuation, groundwater recharge, indigenous floral and fauna) diversity and abundance, nutrient cycling, organic carbon export/cycling, protection of downstream water quality, recreation, resilience against climactic effects, sediment/shoreline stabilization, surface water storage, wild rice, and water dependent wildlife. [In addition to listing the designated uses of waters of the Fond du Lac Reservation, this condition also limits the project proponent to discharges that will not violate our Water Quality Standards. FDL Water Quality Certification Ordinance, Section 204 (a) (7)). Appropriate steps shall be taken to ensure that petroleum products or other chemical pollutants are prevented from entering waters of the Fond du Lac Reservation. All spills must be reported to the appropriate emergency management Agency (National Response Center AND the State Duty Officer), and measures shall be taken immediately to prevent the pollution of waters of the Fond du Lac Reservation, including groundwater. The Fond du Lac Office of Water Protection must also be notified immediately of any spill regardless of size. [This condition helps protect water quality and also reminds project proponents of their responsibility in reporting spill events. FDL Water Quality Certification Ordinance, Section 204 (b) (3)). All seed mixes, whether used for temporary stabilization or permanent seeding, shall NOT contain any annual ryegrass (Lolium species). Wild rye (Elymus species) or Oats (Avena species) may be used as a replacement in seed mixes. [This condition prevents the use of annual ryegrass on the Reservation. Annual ryegrass is allelopathic, which means it produces biochemical in its roots that inhibit the growth of native plants. If used in seed mixes, annual ryegrass could contribute to erosion, especially on slopes. However, the condition also specifies substitute grasses that germinate almost as fast as annual ryegrass for use as a cover crop to help prevent erosion. FDL Water Quality Certification Ordinance, Section 204 (t) (1)). To prevent the introduction of invasive species, ALL contractors and subcontractors MUST disclose information stating prior equipment location(s) and ALL known invasive species potentially being transported from said location(s). All equipment MUST undergo a high pressure wash (including any equipment mats) BEFORE ENTERING the Fond du Lac Reservation. Personal equipment such as work boots, gloves, vest, etc. MUST be clean of debris, dirt and plant and animal material BEFORE ENTERING the Fond du Lac Reservation. Equipment being transported from known infested areas MUST undergo a high pressure wash as soon as possible after leaving the infested site and again BEFORE ENTERING the Fond du Lac Reservation, to avoid transport of invasive species into areas surrounding the Reservation. Written certification of equipment cleaning MUST be provided to the Fond du Lac Office of Water Protection. Upon arrival, ALL contractor and subcontractor equipment will be inspected by appointed Fond du Lac staff. If equipment is deemed unsatisfactory, the equipment MUST 2022 Construction General Permit (CGP) Page 64 undergo a high pressure washing until the equipment is cleared by the inspector, until such time, minimal travel will be allowed through the Reservation. The contractor shall be held responsible for the control of any invasive species introduced as a result of their project. [This condition requires the project proponent to prevent the inadvertent introduction of invasive species by taking an active role in cleaning all vehicles, equipment, and equipment mats before entering the Reservation. This condition has been placed in certifications since 2012, due to the introduction of Wild Parsnip in 2011 from a pipeline contractor. It is much easier to prevent the introduction of an invasive species than it is to eradicate it once it has been introduced. Many invasive plant species form monocultures, preventing native plants from growing. This situation often leads to cases of erosion, which in turn effects water quality. FOL Water Quality Certification Ordinance, Section 204 (g) (1)]. A copy of this certification MUST be kept by the contractor on-site at all times and be available for viewing by all personnel, including inspectors. [This condition ensures that the information contained in the certification, especially the conditions, is readily available onsite for reference. FOL Water Quality Certification Ordinance, Section 204 (a) (9)]. The Grand Portage Band of Lake Superior Chippewa The CGP authorization is for construction activities that may occur within the exterior boundaries of the Grand Portage Reservation in accordance to the Grand Portage Land Use Ordinance. The CGP regulates stormwater discharges associated with construction sites of one acre or more in size. Only those activities specifically authorized by the CGP are authorized by this certification (the “Certification”). All construction stormwater discharges authorized by the CGP must comply with the Water Quality Standards and Water Resources Ordinance, as well as Applicable Federal Standards (as defined in the Water Resources Ordinance). All appropriate steps must be taken to ensure that petroleum products or other chemical pollutants are prevented from entering the Waters of the Reservation. All spills must be reported to the appropriate emergency-management agency, and measures must be taken to prevent the pollution of the Waters of the Reservation, including groundwater. The 2022 CGP requires inspections and monitoring reports of the construction site stormwater discharges by a qualified person. Monitoring and inspection reports must comply with the minimum requirements contained in the 2022 CGP. The monitoring plan must be prepared and incorporated into the Storm Water Pollution Prevention Plan (the “SWPP”). A copy of the SWPP must be submitted to the Board at least 30 days in advance of sending the requisite Notice of Intent to EPA. The SWPP should be sent to: Grand Portage Environmental Resources Board P.O. Box 428 Grand Portage, MN 55605 Copies of the Notice of Intent and Notice of Termination required under the General Permit must be submitted to the Board at the address above at the same time they are submitted to the EPA. 2022 Construction General Permit (CGP) Page 65 If requested by the Grand Portage Environmental Department, the permittee must provide additional information necessary for a case-by-case eligibility determination to assure compliance with the Water Quality Standards and any Applicable Federal Standards. The burden is on the applicant to demonstrate compliance with the Water Quality Standards, the Water Resources Ordinance, and Applicable Federal Standards whether or not the application is ultimately eligible for the CGP. CGP discharges must not cause nuisance conditions as defined in Grand Portage Water Quality Standards. The Board retains full authority to ensure compliance with and to enforce the provisions of the Water Resource Ordinance and Water Quality Standards, Applicable Federal Standards, and these Certification conditions. Nothing herein affects the scope or applicability of other controlling tribal or federal requirements, including but not limited to impacts to cultural, historical, or archeological features or sites, or properties that may be eligible for listing on the National Register of Historic Places under the National Historic Preservation Act, 54 U.S.C. §§ 300101 et seq. Appeals related to Board actions taken in accordance with any of the preceding conditions may be heard by the Grand Portage Tribal Court. Leech Lake Band of Ojibwe The water quality standards that apply to the construction site are the standards at the time the operator submits its Notice of Intent (NOI) to EPA and the LLBO WRP (see conditions # 2 and # 3). A copy of the Stormwater Pollution Prevention Plan (SWPPP) must be submitted to the LLBO WRP at least 30 days in advance of sending the NOI for the project to EPA. See attached LLBO 401 Water Quality Certification Ordinance. Section 304(a)(1). The SWPPP should be submitted electronically to Jeff.Harper@llojibwe.net and by hardcopy sent to: Leech Lake Band of Ojibwe ATTN: Water Resources Program - 401 Cert Division of Resource Management 190 Sailstar Drive NW Cass Lake, Minnesota 56633 Copies of the NOI and the Notice of Termination (NOT) must be submitted to the LLBO WRP at the same time they are submitted to EPA. See attached LLBO 401 Water Quality Certification Ordinance, Section 304(a)(2). The NOI and NOT should be submitted electronically to Jeff.Harper@llojibwe.net and sent by hardcopy to the address cited in condition # 2. Any and all other conditions listed in Section 304 of the attached LLBO 401 Water Quality Certification Ordinance shall be observed unless the LLBO WRP deems that certain conditions therein are not applicable to the project in need of a permit under this certification. A copy of this certification MUST be kept by the contractor on-site at all times and be available for viewing by all personnel, including inspectors. 2022 Construction General Permit (CGP) Page 66 Upon consideration of the NOI, if the LLBO WRP finds that the discharge will not be controlled as necessary to meet applicable water quality standards, the LLBO WRP may insist, consistent with Part 3.1 of the CGP, that additional controls are installed to meet applicable water quality standards, or recommend to EPA that the operator obtain coverage under an individual permit. 9.5.2 WIR10I000 Indian country within the State of Wisconsin Bad River Band of Lake Superior Tribe of Chippewa Indians Only those activities specifically authorized by the CGP are authorized by this Certification. This Certification does not authorize impacts to cultural properties, or historical sites, or properties that may be eligible for listing as such. All projects which are eligible for coverage under the CGP and are located within the exterior boundaries of the Bad River Reservation shall be implemented in such a manner that is consistent with the Tribe’s Water Quality Standards (WQS). The Tribe’s WQS can be viewed at: http://www.badriver-nsn.gov/wp- content/uploads/2020/01/NRD_WaterQualityStandards_2011.pdf Operators are not eligible to obtain authorization under the CGP for all new discharges to an Outstanding Tribal Resource Water (OTRW or Tier 3 water). OTRWs, or Tier 3 waters, include the following: Kakagon Slough and the lower wetland reaches of its tributaries that support wild rice, Kakagon River, Bad River Slough, Honest John Lake, Bog Lake, a portion of Bad River, from where it enters the Reservation through the confluence with the White River, and Potato River. OTRWs can be viewed at: https://www.arcgis.com/apps/View/index.html?appid=6f44c371217e4ee8b5f1c2 c705c 7c7c5 An operator proposing to discharge to an Outstanding Resource Water (ORW or Tier 2.5 water) under the CGP must comply with the antidegradation provisions of the Tribe’s WQS. ORWs, or Tier 2.5 waters, include the following: a portion of Bad River, from downstream the confluence with the White River to Lake Superior, White River, Marengo River, Graveyard Creek, Bear Trap Creek, Wood Creek, Brunsweiler River, Tyler Forks, Bell Creek, and Vaughn Creek. ORWs can be viewed at: https://www.arcgis.com/apps/View/index.html?appid=6f44c371217e4ee8b5f1c2 c705c 7c7c5. The antidegradation demonstration materials described in provision E.4.iii., and included on the antidegradation demonstration template found at: https://www.badriver-nsn.gov/natural-resources/projectreviews/, must be submitted to the following address: Bad River Tribe’s Natural Resources Department Attn: Water Regulatory Specialist P.O. Box 39 Odanah, WI 54861 WaterReg@badriver-nsn.gov An operator proposing to discharge to an Exceptional Resource Water (ERW or Tier 2 water) under the CGP must comply with the antidegradation provisions of the Tribe’s WQS. ERWs, or Tier 2 waters, include the following: any surface water within the exterior boundaries of the Reservation that is not specifically classified as an Outstanding Resource Water (Tier 2.5 water) or an Outstanding Tribal Resource Water (Tier 3 water). ERWs can be viewed at: 2022 Construction General Permit (CGP) Page 67 https://www.arcgis.com/apps/View/index.html?appid=6f44c371217e4ee8b5f1c2 c705c 7c7c5. The antidegradation demonstration materials described in provision E.4.ii., and included on the antidegradation demonstration template found at: https://www.badriver-nsn.gov/natural-resources/projectreviews/, must be submitted to the following address: Bad River Tribe’s Natural Resources Department Attn: Water Regulatory Specialist P.O. Box 39 Odanah, WI 54861 WaterReg@badriver-nsn.gov Projects utilizing cationic treatment chemicals within the Bad River Reservation boundaries are not eligible for coverage under the CGP. A discharge to a surface water within the Bad River Reservation boundaries shall not cause or contribute to an exceedance of the turbidity criterion included in the Tribe’s WQS, which states: Turbidity shall not exceed 5 NTU over natural background turbidity when the background turbidity is 50 NTU or less, or turbidity shall not increase more than 10% when the background turbidity is more than 50 NTU. All projects which are eligible for coverage under the CGP within the exterior boundaries of the Bad River Reservation must comply with the Bad River Reservation Wetland and Watercourse Protection Ordinance, or Chapter 323 of the Bad River Tribal Ordinances, including the erosion and sedimentation control, natural buffer, and stabilization requirements. Questions regarding Chapter 323 and requests for permit applications can be directed to the Wetlands Specialist in the Tribe’s Natural Resources Department at (715) 682-7123 or wetlands@badriver-nsn.gov. An operator of a project, which is eligible for coverage under the CGP, that would result in an allowable discharge under the CGP occurring within the exterior boundaries of the Bad River Reservation must notify the Tribe prior to the commencing earth-disturbing activities. The operator must submit a copy of the Notice of Intent (NOI) to the following addresses at the same time it is submitted to the U.S. EPA: Bad River Tribe’s Natural Resources Department Attn: Water Regulatory Specialist P.O. Box 39 Odanah, WI 54861 WaterReg@badriver-nsn.gov Bad River Tribe’s Natural Resources Department Attn: Tribal Historic Preservation Officer (THPO) P.O. Box 39 Odanah, WI 54861 THPO@badriver-nsn.gov The operator must also submit a copy of the Notice of Termination (NOT) to the above addresses at the same time it is submitted to the U.S. EPA. Photographs showing the current site conditions must be included as part of the NOT to document the stabilization requirements have been met. The THPO must be provided 30 days to comment on the project. 2022 Construction General Permit (CGP) Page 68 The operator must obtain THPO concurrence in writing. This written concurrence will outline measures to be taken to prevent or mitigate effects to historic properties. For more information regarding the specifics of the cultural resources process, see 36 CFR Part 800. A best practice for an operator is to consult with the THPO during the planning stages of an undertaking. An operator of a project, which is eligible for coverage under the CGP, that would result in an allowable discharge under the CGP occurring within the exterior boundaries of the Bad River Reservation must submit a copy of the Stormwater Pollution Prevention Plan (SWPPP) to the following address at the same time as submitting the NOI: Bad River Tribe’s Natural Resources Department Attn: Water Regulatory Specialist P.O. Box 39 Odanah, WI 54861 WaterReg@badriver-nsn.gov Any corrective action reports that are required under the CGP must be submitted to the following address within one (1) working day of the report completion: Bad River Tribe’s Natural Resources Department P.O. Box 39 Odanah, WI 54861 WaterReg@badriver-nsn.gov An operator of a project, which is eligible for coverage under the CGP, that would result in an allowable discharge under the CGP occurring within the exterior boundaries of the Bad River Reservation must submit a copies of the inspection reports (including photographs) to the following address within 24 hours of completing any site inspection required: Bad River Tribe’s Natural Resources Department Attn: Water Regulatory Specialist P.O. Box 39 Odanah, WI 54861 WaterReg@badriver-nsn.gov An operator shall be responsible for meeting any additional permit requirements imposed by the U.S. EPA necessary to comply with the Tribe’s antidegradation policies if the discharge point is located upstream of waters designated by the Tribe. 9.6 EPA REGION 6 9.6.1 NMR100000 State of New Mexico, except Indian country In Outstanding National Resource Waters (ONRWs) in New Mexico, no degradation is permitted except in limited, specifically defined instances. Therefore, Operators are not eligible to obtain authorization under this general permit for stormwater discharges to waters classified as ONRWs listed in Paragraph D of 20.6.4.9 New Mexico Administrative Code (NMAC), also referred to as “Tier 3 waters” as defined in Appendix A of this permit. Exception: When construction activities are in response to a public emergency (e.g., wildfire, extreme flooding, etc.) and the related work requires immediate authorization to avoid a threat to public health or safety. Operators who conduct construction activities in response to a public emergency to mitigate an immediate threat to public health or safety shall 2022 Construction General Permit (CGP) Page 69 adhere to the requirements in 20.6.4.8(A)(3)(c) NMAC, including notifying the New Mexico Environment Department (NMED) within seven days of initiation of the emergency action and providing NMED with a summary of the action taken within 30 days of initiation of the emergency action. For all other scenarios, Operators with proposed discharges to ONRWs in New Mexico shall obtain coverage from EPA under an NPDES Individual Permit and will comply with the additional standards and regulations related to discharges to ONRWs in 20.6.4.8(A) NMAC. Additional information is available from: New Mexico Environment Department Surface Water Quality Bureau P.O. Box 5469 Santa Fe, NM 87502‐5469 Telephone: 505‐827‐0187 https://www.env.nm.gov/surface‐water‐quality/wqs/ https://gis.web.env.nm.gov/oem/?map=swqb If construction dewatering activities are anticipated at a construction site and non‐ stormwater discharges of groundwater, subsurface water, spring water, and/or other dewatering water are anticipated, the Operators/Permittees must complete the following steps: 1. Review the state’s Ground Water Quality Bureau Mapper (https://gis.web.env.nm.gov/GWQB/) and Petroleum Storage Tank Bureau Mapper (https://gis.web.env.nm.gov/GWQB/). Check if the following sources are located within the noted distance from the anticipated construction dewatering activity. At a minimum, a list of the following potential sources of contaminants and pollutants at the noted distance is to be kept in the SWPPP. 2022 Construction General Permit (CGP) Page 70 Source of Potential Contamination or Pollutants* Constituents likely to be required for testing* Within 0.5 mile of an open Leaking Underground Storage Tank (LUST) site BTEX (Benzene, Toluene, Ethylbenzene, and Xylene) plus additional parameters depending on site conditions** Within 0.5 mile of an open Voluntary Remediation site All applicable parameters or pollutants listed in 20.6.4.13, 20.6.4.52, 20.6.4.54, 20.6.4.97 thru 20.6.4.99, 20.6.4.101 through 20.6.4.899, and 20.6.4.900 NMAC (or an alternate list approved by the NMED‐ SWQB)* Within 0.5 mile of an open RCRA Corrective Action Site Within 0.5 mile of an open Abatement Site Within 0.5 mile of an open Brownfield Site Within 1.0 mile or more of a Superfund site or National Priorities List (NPL) site with associated groundwater contamination. Construction activity contaminants and/or natural water pollutants Additional parameters depending on site activities and conditions (Contact NMED‐ SWQB for an alternate list)* *For further assistance determining whether dewatering may encounter contaminated sources, please contact the NMED Ground Water Quality Bureau at 505‐827‐2965 or NMED Surface Water Quality Bureau (SWQB) at 505‐827‐0187. ** EPA approved sufficiently sensitive methods must be used. For known PCB sources and analysis, EPA Method 1668C must be used (see https://www.epa.gov/cwa‐methods). 2. If dewatering activities are anticipated, information on the flow rate and potential to encounter contaminated groundwater, subsurface water, spring water, or dewatering water must be provided directly to NMED at the following address: NMED Surface Water Quality Bureau Program Manager, Point Source Regulation Section PO Box 5469, Santa Fe, NM 87502 Please call the SWQB to obtain the appropriate email address (505‐827‐0187). 3. In addition, the Operator/Permittee must characterize the quality of the groundwater and subsurface water, spring water, or dewatering water being considered for discharge according to the table above and including dissolved hardness and pH. Considering the contaminant sources listed in the table above, water quality data may already be available. For further assistance, contact the 2022 Construction General Permit (CGP) Page 71 NMED Surface Water Quality Bureau (505‐827‐0187), Ground Water Quality Bureau (505‐827‐ 2965), Petroleum Storage Tank Bureau (505‐476‐4397), or Hazardous Waste Bureau (505‐476‐ 6000). i. The Operator/Permittee must submit recent analytical test results (i.e., within the past 5 years) according to the table above, and including dissolved hardness and pH, to the EPA Region 6 Stormwater Permit Contact and the NMED Surface Water Quality Bureau (see contact information in #2 above). If the test data exceed applicable water quality standards, then the groundwater, subsurface water, spring water, or dewatering water cannot be discharged into surface waters under this general permit. Operators/Permittees may submit an NPDES Individual Permit application to treat and discharge to waters of the U.S. or find alternative disposal measures. No discharges to surface waters are allowed until authorized. ii. If the discharge has the potential to affect groundwater (e.g., land application), the Operator/Permittee must submit an NOI to the NMED Ground Water Quality Bureau (see 20.6.2.1201 NMAC – Notice of Intent to Discharge). 4. The Operator/Permittee must document any findings and all correspondence with NMED and EPA in the SWPPP. Operators who intend to obtain authorization under this permit for new and existing storm water discharges from construction sites must satisfy the following condition: The SWPPP must include site‐specific interim and permanent stabilization, managerial, and structural solids, erosion and sediment control best management practices (BMPs) and/or other controls that are designed to prevent to the maximum extent practicable an increase in the sediment yield and flow velocity from pre‐construction, pre‐development conditions to assure that applicable standards in 20.6.4 NMAC, including the antidegradation policy, and TMDL waste load allocations (WLAs) are met. This requirement applies to discharges both during construction and after construction operations have been completed. The SWPPP must identify and document the rationale for selecting these BMPs and/or other controls. The SWPPP must also describe design specifications, construction specifications, maintenance schedules (including a long‐term maintenance plan), criteria for inspections, and expected performance and longevity of these BMPs. For sites greater than 5 acres in size, BMP selection must be made based on the use of appropriate soil loss prediction models (i.e. SEDCAD, RUSLE, SEDIMOT, MULTISED, etc.) OR equivalent generally accepted (by professional erosion control specialists) soil loss prediction tools. For all sites, the Operator(s) must demonstrate, and include documentation in the SWPPP, that implementation of the site‐specific practices will ensure that the applicable standards and TMDL WLAs are met, and will result in sediment yields and flow velocities that, to the maximum extent practicable, will not be greater than the sediment yield levels and flow velocities from preconstruction, pre‐ development conditions. All SWPPPs must be prepared in accordance with good engineering practices by qualified (e.g., CPESC certified, engineers with appropriate training) erosion control specialists familiar with the use of soil loss prediction models and design of erosion and sediment control systems based on these models (or equivalent soil 2022 Construction General Permit (CGP) Page 72 loss prediction tools). Qualifications of the preparer (e.g., professional certifications, description of appropriate training) must be documented in the SWPPP. The Operator(s) must design, implement, and maintain BMPs in the manner specified in the SWPPP. NMED supports the use of EPA’s small residential lot template if a site qualifies to use it as explained in the permit, as long as it is consistent with the above requirements. NMED’s requirement does not preclude small residential sites from using the template, but it may require an additional short paragraph to justify the selection of specific BMPs for the site. Operators must notify NMED when discharges of toxic or hazardous substances or oil from a spill or other release occurs ‐ see Emergency Spill Notification Requirements, Part 2.3.6 of the permit. For emergencies, Operators can call 505‐827‐9329 at any time. For non‐emergencies, Operators can call 866‐428‐6535 (voice mail 24‐hours per day) or 505‐476‐6000 during business hours from 8am‐5pm, Monday through Friday. Operators can also call the NMED Surface Water Quality Bureau directly at 505‐827‐ 0187. Operators of small construction activities (i.e., 1‐5 acres) are not eligible to qualify for a waiver in lieu of needing to obtain coverage under this general permit based on Item C.3 of Appendix C (Equivalent Analysis Waiver) in the State of New Mexico. 9.6.2 NMR10I000 Indian country within the State of New Mexico, except Navajo Reservation Lands that are covered under Arizona permit AZR10000I and Ute Mountain Reservation Lands that are covered under Colorado permit COR10000I. Nambe Pueblo The operator must provide a copy of the Notice of Intent (NOI) and Notice of Termination (NOT) to the Nambe Pueblo Governor's Office at the same time it is provided to the US Environmental Protection Agency. The NOI and NOT should be provided to the following address: Office of the Governor Nambe Pueblo !SA NPI02 WEST Nambe Pueblo, New Mexico 87506 The operator must provide a copy of the Storm Water Pollution Prevention Plan (SWPPP) to Nambe Pueblo at the same time it is submitted to the EPA, either by email to governor@nambepueblo.org or mailed to the above address. The operator must provide copies of inspection reports, a copy of the corrective action log, and modifications made to the SWPPP as a result of inspection findings, upon request by the Nambe Pueblo Department of Environmental and Natural Resources or Nam be Governor. Ohkay Owingeh Tribe All operators obtaining permit coverage under the EPA CGP, must submit a copy of the certified (signed) Notice of Intent (NOI) to the Ohkay Owingeh Office of Environmental Affairs, a copy of NOI modifications and the Notice of Termination (NOT), must be provided within three business days after EPA provides electronic confirmation that the submission has been received. The NOI and NOT must be provided to the following address: 2022 Construction General Permit (CGP) Page 73 Naomi L. Archuleta - Environmental Programs Manager Ohkay Owingeh Office of Environmental Affairs P.O. Box 717 Ohkay Owingeh, NM 87566 naomi.archuleta@ohkay.org Noah Kaniatobe - Environmental Specialist Ohkay Owingeh, Office of Environmental Affairs P.O. Box 717 Ohkay Owingeh, NM 87566 noah.kaniatohe@ohkay.org All operators obtaining permit coverage under the EPA CGP, must submit an electronic copy of the Storm Water Pollution Prevention Plan (SWPPP) to Ohkay Owingeh Office of Environmental Affairs at the same time that the NOI is submitted to the tribe (see contact information listed above). Following each incident where the operator takes a corrective action the operator must provide the corrective action log to the Ohkay Owingeh Office of Environmental Affairs. The operator must notify Ohkay Owingeh Office of Environmental Affairs within 24 hours, in the event of an emergency spill in addition to the notification requirements at Part 2.3.6 of the CGP. Please contact: Ohkay Owingeh Tribal Police Department at 505.852.2757. Please contact: Ohkay Owingeh Tribal Police Department 505.852.2757 Pueblo of Isleta All operators obtaining permit coverage under the EPA CGP must submit a copy of the certified Notice of Intent (NOI) to the Pueblo of Isleta at the same time it is submitted to EPA for projects occurring within the exterior boundaries of the Pueblo of Isleta. Additionally, a copy of NOI modifications and the Notice of Termination (NOT), must be provided within three business days after EPA provides electronic confirmation that the submission has been received. The Notices must be provided to the following address: Water Quality Control Officer Pueblo of Isleta Environment Department PO Box 1270 Isleta NM 87022 505-869-7565 WQCO@isletapueblo.com The operator must notify the Pueblo of Isleta’s Dispatch at 505-869-3030 as soon as possible and the Pueblo of Isleta Water Quality Control Officer within 10 hours, in the event of a spill of hazardous or toxic substances or if health or the 2022 Construction General Permit (CGP) Page 74 environment become endangered in addition to the notification requirements at Part 2.3.6 and at I.12.6.1 of the CGP. All operators obtaining permit coverage under the EPA CGP must submit an electronic copy of the Stormwater Pollution Prevention Plan (SWPPP) to the Pueblo of Isleta Water Quality Control Officer at the above address, 30 days prior to submitting the certified NOI to EPA. If the electronic file is too large to send through e-mail, a zip file or flash drive may be submitted. All operators obtaining permit coverage under the EPA CGP must give 2 days advance notice to the Pueblo of Isleta Water Quality Control Officer of any planned changes in the permitted activity which may result in noncompliance with permit requirements. All operators obtaining permit coverage under the EPA CGP must post a sign or other notice of permit coverage at a safe, publicly accessible location in close proximity to the construction site. The notice must be located so that it is visible from the public road or tribal road that is nearest to the active part of the construction site. The sign must be maintained on-site from the time construction activities begin until final stabilization is met. Erosion and sediment controls shall be designed to retain sediment on-site and project-generated waste materials that have the potential to discharge pollutants shall not be placed on open soil or on a surface that is not stabilized. Volumes of sediment over five (5) cubic yards must be removed from the active construction site; additionally, if sediment is placed for disposal within the exterior boundaries of the Pueblo of Isleta, disposal must be within a tribally approved sediment disposal site. Pueblo of Laguna All operators obtaining permit coverage under the EPA CGP must submit an electronic copy of the certified (signed) Notice of Intent (NOI) to the Pueblo of Laguna's Environmental & Natural Resources Department (ENRD) within three business days of submittal to the EPA. Additionally, a copy of NOI modifications and the Notice of Termination (NOT), must be provided within three business days after the EPA provides electronic confirmation that the submission has been received. The NOI and NOT must be electronically submitted to info.environmental@pol-nsn.gov. All operators obtaining permit coverage under the EPA CGP must submit an electronic copy of the Stormwater Pollution Prevention Plan (SWPPP) to the Pueblo of Laguna's ENRD 14 days prior to the submittal of the NOI (see contact information listed above). The operator must provide copies of corrective actions logs and modifications made to the SWPPP as a result of inspection findings to the Pueblo of Laguna ENRD (see contact information above). In addition to the notification requirements of Part 2.3.6 of the CPG [EPA interprets this intending to refer to the CGP], the operator must notify the Pueblo of Laguna ENRD at 505-552-7512 in the event of an emergency spill as soon as possible. Pueblo of Sandia. The following conditions apply only to discharges on the Pueblo of Sandia Reservation: 2022 Construction General Permit (CGP) Page 75 All operators obtaining permit coverage under the EPA CGP, must submit a copy of the certified (signed) Notice of lntent (NOI) to the Pueblo of Sandia Environment Department concurrently with submittal to the EPA. Additionally, a copy of NOI modifications and the Notice of Termination (NOT), must be provided concurrently with submittal to the EPA. The NOI and NOT must be provided electronically to the following addresses: Electronic Addresses: Amy Rosebrough (Water Quality Manager): rosebrough@sanidapueblo.nsn.us Greg Kaufman (Environment Director):gkaufman@sandiapueblo.nsn.us All operators obtaining permit coverage under the EPA CGP, must submit an electronic copy of the Stormwater Pollution Prevention Plan (SWPPP) to the Pueblo of Sandia Environment. Department at least 14 days prior to submittal of the NOI to the Pueblo (see contact information listed above). If requested by the Pueblo of Sandia Environment Department, the permittee must provide additional information necessary on a case-by-case basis to assure compliance with the Pueblo of Sandia Water Quality Standards and/or applicable Federal Standards. An "Authorization to Proceed Letter" with site specific mitigation requirements may be sent out to the permittee when a review of the NOI and SWPPP, on a case-by-case basis, is completed by the Pueblo of Sandia Environment Department. This approval will allow the application to proceed if all mitigation requirements are met. The Pueblo of Sandia will not allow Small Construction Waivers (Appendix C) to be granted for any small construction activities. The operator must provide copies of inspection reports, a copy of the corrective action log, and modifications made to the SWPPP as a result of inspection findings to the Pueblo of Sandia Environment Department upon request. An inspection report and corrective action log must be submitted to the Pueblo within 3 days of any inspection that results in corrective action (see contact information listed above). The operator must notify the Pueblo of Sandia within 24 hours in the event of an emergency spill, in addition to the notification requirements at Part 2.3.6 of the COP (see contact information listed above). Before submitting a Notice of Termination (NOT) to the EPA, permittees must clearly demonstrate to the Pueblo of Sandia Environment Department through a site visit or documentation that requirements for site stabilization have been met and any temporary erosion control structures have been removed. A short letter stating that the NOT is acceptable and all requirements have been met will be sent to the permittee to add to the permittee's NOT submission to the EPA. Pueblo of Santa Ana. The following conditions apply only to discharges on the Pueblo of Santa Ana Reservation: All operators obtaining permit coverage under the EPA CGP, must submit a copy of the certified (signed) Notice of Intent (NOI) to the Pueblo's Department of Natural Resources within three business days of submittal to EPA. Additionally, a copy of NOI modifications and the Notice of Termination (NOT), must be 2022 Construction General Permit (CGP) Page 76 provided within three business days after EPA provides electronic confirmation that the submission has been received. The NOI and NOT must be provided to the following address: Regular U.S. Delivery Mail: Pueblo of Santa Ana Department of Natural Resources Water Resources Division Attn: Andrew Sweetman 02 Dove Rd Santa Ana Pueblo, NM 87004 Electronically: Andrew Sweetman Water Resources Division Manager Andrew.Sweetman@santaana-nsn.gov Tammy Montoya Hydrologist Tammy.Montoya@santaana-nsn.gov All operators obtaining permit coverage under the EPA CGP, must submit an electronic copy of the Stormwater Pollution Prevention Plan (SWPPP) to the to the Pueblo's Department of Natural Resources at the same time that the NO! is submitted to the tribe (see contact information listed above). The operator must provide copies of inspection reports, a copy of the corrective action log, and modifications made to the SWPPP as a result of inspection findings, upon request by the Pueblo's Department of Natural Resources. The operator must notify the Pueblo's Department of Natural Resources within 24 hours in the event of an emergency spill, in addition to the notification requirements at Part 2.3.6 of the CGP. Pueblo of Taos All operators obtaining permit coverage under the EPA CGP, must submit a copy of the certified (signed) Notice of lntent (NOi) to the Taos Pueblo Environmental Office and Taos Pueblo Governor's Office within three business days of submittal to EPA. Additionally, a copy of NOi modifications and the Notice of Termination (NOT), must be provided within three business days after EPA provides electronic confirmation that the submission has been received. The NOi and NOT must be provided to the following addresses: Honorable Governor of Taos Pueblo PO Box 1846 Taos, New Mexico 87571 Taos Pueblo Environmental Office PO Box 1846 Taos, New Mexico 87571 All operators obtaining permit coverage under the EPA CGP, must submit an electronic copy of the Stormwater Pollution Prevention Plan (SWPPP) to the Taos Pueblo Environmental Office when the NOI is submitted to the tribe. Electronic copy of SWPPP downloaded on flash drive may be sent to the above address for the Taos Pueblo Environmental Office. The operator must provide a copy of the corrective action log following each corrective action undertaken and modifications made to the SWPPP as a result of 2022 Construction General Permit (CGP) Page 77 a corrective action to the Taos Pueblo Environmental Office at address listed above. Pueblo of Tesuque. All operators obtaining permit coverage under the EPA CGP, must submit a copy of the certified (signed) Notice of Intent (NOI) to the Pueblo of Tesuque Department of Environment and Natural Resources (DENR) and the Pueblo's Governor within three business days of submittal to EPA. Additionally, a copy of any NOi modifications and the Notice of Termination (NOT), must be provided within three business days after EPA provides electronic confirmation that the submission has been received. The NOI and NOT must be provided to the following address: Governor Mark Mitchell Pueblo of Tesuque 20 TP 828 Santa Fe, NM 87506 governor@pueblooftesuque.org Sage Mountain.flower Pueblo of Tesuque Department of Environment and Natural Resources Director 20 TP 828 All operators obtaining permit coverage under the EPA CGP, must submit an electronic copy of the Stormwater Pollution Prevention Plan (SWPPP) to Pueblo of Tesuque DENR and the Pueblo's Governor at the same time that the NO! is submitted to the EPA (see contact information listed above). The operator must provide a copy of the corrective action log, and any modifications made to the SWPPP as a result of inspection findings, or upon request by the Pueblo of Tesuque DENR. The operator must notify the Pueblo of Tesuque DENR within 24 hours in the event of an emergency spill, in addition to the notification requirements at Part 2.3.6 of the CGP (see contact information listed above). Santa Clara Indian Pueblo. All operators obtaining permit coverage under the EPA CGP, must submit a copy of the certified (signed) Notice of Intent (NOI) to the Santa Clara Pueblo Office of Environmental Affairs at the same time the NOI is submitted to the U.S. EPA. Additionally, a copy of the NOI modifications and the Notice of Termination (NOT), must be provided at the same time after electronic confirmation is received from EPA that the NOT has been accepted. The NOI and NOT shall be provided to the following address in electronic format: Dino Chavarria, Santa Clara Pueblo Office of Environmental Affairs dinoc@santaclarapueblo.org All operators obtaining permit coverage under the EPA CGP, must submit an electronic copy of the Stormwater Pollution Prevention Plan to the Santa Clara Pueblo Office of Environmental Affairs at the same time the NOI is submitted to the U.S. EPA (see contact information listed above). 2022 Construction General Permit (CGP) Page 78 The operator must notify the Santa Clara Pueblo Office of Environmental Affairs at the address above within 24 hours, in the event of an emergency spill, in addition to the notification requirements at Part 2.3.6 of the CGP 9.6.3 OKR10I000 Indian country within the State of Oklahoma, except areas of Indian country covered by an extension of state program authority pursuant to Section 10211 of the Safe, Accountable, Flexible, Efficient Transportation Equity Act (SAFETEA). Pawnee Nation. The following conditions apply only to discharges within Pawnee Indian country: Copies of the Notice of Intent (NOI) and Notice of Termination (NOT) must be provided to the Pawnee Nation at the same time it is submitted to the Environmental Protection Agency to the following address: Pawnee Nation Department of Environmental Conservation and Safety P.O. Box 470 Pawnee, OK 74058 Or email to dnrs@pawneenation.org An electronic copy of the Storm Water Pollution Prevention Plan (SWPPP) must be submitted to the Pawnee Nation Department of Environmental Conservation and Safety at the same time the NOI is submitted. The operator must provide access to the site for inspections and for copies of inspection reports, copy of the corrective action log and modifications, made to the SWPPP because of inspection findings, upon request by the Pawnee Nation DECS. The Pawnee Nation Department of Environmental Conservation and Safety must be notified at 918.762.3655 immediately upon discovery of any noncompliance with any provision of the permit conditions. 9.6.4 OKR10F000 Discharges in the State of Oklahoma that are not under the authority of the Oklahoma Department of Environmental Quality, or the Oklahoma Department of Agriculture and Forestry including activities associated with oil and gas exploration, drilling, operations, and pipelines (includes SIC Groups 13 and 46, and SIC codes 492 and 5171), and point source discharges associated with agricultural production, services, and silviculture (includes SIC Groups 01, 02, 07, 08, 09). For activities located within the watershed of any Oklahoma Scenic River, including the Illinois River, Flint Creek, Barren Fork Creek, Upper Mountain Fork, Little Lee Creek, and Lee Creek or any water or watershed designated “ORW” in Oklahoma’s Water Quality Standards, this permit may only be used to authorize discharges from temporary construction activities. Certification is denied for any on-going activities such as sand and gravel mining or any other mineral mining. For activities located within the watershed of any Oklahoma Scenic River, including the Illinois River, Flint Creek, Barren Fork Creek, Upper Mountain Fork, Little Lee Creek, and Lee Creek or any water or watershed designated “ORW” in Oklahoma’s Water Quality Standards, certification is denied for any discharges originating from support activities, including, but not limited to, concrete or asphalt batch plants, equipment staging yards, material storage areas, excavated material disposal areas, or borrow areas. 2022 Construction General Permit (CGP) Page 79 Dewatering discharges into sediment or nutrient-impaired waters, and waters identified as Tier 2, Tier 2.5, or Tier 3 (OAC 785:46-13) shall be controlled to meet water quality standards for turbidity in those waters as follows: Cool Water Aquatic Community/Trout Fisheries: 10 NTUs (OAC 785: 45-5- 12(f)(7)(A)(i) Lakes: 25 NTUs (OAC 785: 45-5-12(f)(7)(A)(ii) In waters where background turbidity exceeds these values, turbidity from dewatering discharges should be restricted to not exceed ambient levels (OAC 785: 45-5-12(f)(7)(B) 9.7 EPA REGION 7 No additional conditions. 9.8 EPA REGION 8 9.8.1 MTR10I000 Indian country within the State of Montana Blackfeet Nation. The Applicant and applicants for projects authorized under the NWPs should obtain all other permits, licenses, and certifications that may be required by federal, state, or tribal authority. Primary relevant tribal permit will be ALPO (Ordinance 117). Others may apply. It is the applicant’s responsibility to know the tribal and local ordinances and complete all necessary permissions before they can commence work. If a project is unable to meet the enclosed conditions, or if certification is denied for an applicable NWP, the Applicant may request an individual certification from Blackfeet. An individual certification request must follow the requirements outlined in 40 CFR 121.5 of EPA’s CWA § 401 Certification Rule, effective September 11, 2020. Copies of this certification should be kept on the job site and readily available for reference. If the project is constructed and/or operated in a manner not consistent with the applicable NWP, general conditions, or regional conditions, the permittee may be in violation of this certification. Blackfeet and EPA representatives may inspect the authorized activity and any mitigation areas to determine compliance with the terms and conditions of the NWP. This NWP Reissuance does not reduce Tribal authority under any other rule. The project, including any stream relocations and restoration, must be built as shown and as otherwise described in the application, the construction plans, cross sections, mitigation plans and other supporting documents submitted to this office. Impacts to aquatic systems and restoration efforts will be monitored by an appropriate aquatic resource professional to ensure that disturbed areas are restored to at least their original condition. All existing water uses will be fully maintained during and after the completion of the project. (If applicable) 2022 Construction General Permit (CGP) Page 80 Where practicable, perform all in-channel and wetland work during periods of low flow or drawn—down or when dry Equipment staging areas must be located out of all delineated wetlands Appropriate soil erosion and sediment controls must be used and maintained in effective operating condition during and immediately after construction, and all exposed soil and other fills, as well as any work below the ordinary high-water mark or in a wetland, must be permanently stabilized as soon as possible Materials such as piling, culverts, sandbags, fabric, mats, timbers used for temporary facilities in wetlands or below the high- water mark of Waters of the US must be free from oil, gas, excess dirt, loose paint and other pollutants. Equipment staging areas in wetlands or in stream or river channels must be placed on mats, or other measures must be taken to minimize soil disturbance and compaction. Clearing of riparian or wetland vegetation for the sole purpose of constructing work bridges, detours, staging areas or other temporary facilities must be limited to the absolute minimum necessary. When temporary impacts to native riparian or wetland vegetation are unavoidable, it must be mowed or cut above ground with the topsoil and root mass left intact. Remove all temporary fills and structures in the entirety when they are no longer needed. Restore affected areas to the appropriate original and planned contours where possible. Re-vegetate disturbed areas with appropriate native species when native species are impacted. Construction methods and best management practices (BMPs) must minimize aquatic resource impacts to the maximum extent possible. Any BMPs described in the Joint Application must be followed. BMPs should include installation and maintenance of sediment control measures; separation, storage and reuse of any topsoil; and recovery of all disturbed areas where possible. All best management practices must in place prior to the onset of construction or as soon as practicable during the construction process. Best available technology and/or best management practices must be utilized to protect existing water uses and maintain turbidity and sedimentation at the lowest practical level. Applicant/contractor should manage disturbed streambank topsoil in a manner that optimizes plant establishment for the site. When operating equipment or otherwise undertaking construction in wetlands and water bodies the following conditions apply: (a) Work should be done in dry conditions if possible. (b) All equipment is to be inspected for oil, gas, diesel, anti-freeze, hydraulic fluid or other petroleum leaks. All such leaks will be properly repaired and equipment cleaned prior to being allowed on the project site. Leaks that occur after the equipment is moved to the project site will be fixed the same day or the next day or removed from the project area. The equipment is not allowed to continue operation once a leak is discovered. 2022 Construction General Permit (CGP) Page 81 (c) All equipment is to be inspected and cleaned before and after use to minimize the spread or introduction of invasive or undesirable species. (d) Construction equipment shall not operate below the existing water surface except as follows: − Impacts from construction should be minimized through the use of best management practices submitted in the permit application. − Essential work below the waterline shall be done in a manner to minimize impacts to aquatic system and water quality. (e) Containment booms and/or absorbent material must be available onsite. Any spills of petroleum products must be reported to the Army Corps, Blackfeet Nation BEO Office and the US EPA within 24 hours. Upland, riparian and in-stream vegetation should be protected except where its removal is necessary for completion of work. Revegetation should be completed as soon as possible. Applicant/contractor should revegetate disturbed soil in a manner that optimizes plant establishment for the site. Revegetation must include topsoil replacement, planting, seeding, fertilization, liming and weed-free mulching as necessary. Applicant must use native plant material and soils where appropriate and feasible. This certification does not allow for the introduction of non-native flora and fauna. All disturbed surface areas must be restored to pre- construction contours and elevation. Spoils piles should not be placed or stored within the delineated wetlands or streams unless protected by a temporary structure designed to divert and handle high flows that can be anticipated during permit activity. Spoils piles should be placed on landscaping fabric or some other material to separate spoils material and allow retrieval of spoils material with minimal impact. Impacts to wetlands shall not exceed 4.92 acres. Any unexpected and additional impacts to waters of the US should be reported to the Army Corps, Blackfeet Environmental Office Water Quality Coordinator and the US EPA. All instream and stream channel reconstruction work must be completed before the stream is diverted into the new channel. Any temporary crossings, bridge supports, cofferdams, or other structures that are necessary during permit activity should be designed to handle high flows that can be anticipated during permit activity. All temporary structures should be completely removed from the water body at the conclusion of the permitted activity and the area restored to a natural function and appearance. The certification does not authorize any unconfined discharge of liquid cement into the waters of the United States. Grouting riprap must occur under dry conditions with no exposure of wet concrete to the water body. BMPs shall include application of certified weed-free straw or hay across all disturbed wetland areas that are temporarily impacted; installation and maintenance of sediment control measures during construction and if necessary, after construction is completed; use of heavy mud mats if necessary; separation, 2022 Construction General Permit (CGP) Page 82 storage and reuse of all streambank topsoil and wetland topsoil, as appropriate; and recovery of all disturbed wetland and streambank areas where possible. All conditions set by the Blackfeet Tribe and US Army Corps must be followed. All applicants, including federal agencies, must notify EPA and the Blackfeet Environmental Office of the use of all NWPs for which certification has been granted prior to commencing work on the project. Notifications must include: (a) project location (lat. Long., exact point on map); (b) NWP that will be used and the specific activity that will be authorized under the NWP; (c) amount of permanent and temporary fills; (d) a short summary of the proposed activity, and all other federal, state, tribal or local permits or licenses required for the project; (e) complete contact information of both the applicant and contractor (name, name of the company or property if applicable, telephone, mobile, and email); and, (f) Summary of best management practices that will be used. (g) A summary of communications with the affected Tribe's water quality staff regarding the project, including any concerns or issues. (h) Notify Blackfeet and EPA at least 7 days before the completion of construction and operations begin. Point source discharges may not occur: (1) in fens, bogs or other peatlands; (2) within 100 feet of the point of discharge of a known natural spring source; or (3) hanging gardens. Except as specified in the application, no debris, silt, sand, cement, concrete, oil or petroleum, organic material, or other construction related materials or wastes shall be allowed to enter into or be stored where it may enter into waters of the U.S. Silt fences, straw wattles, and other techniques shall be employed as appropriate to protect waters of the U.S. from sedimentation and other pollutants. Water used in dust suppression shall not contain contaminants that could violate water quality standards. Erosion control matting that is either biodegradable blankets or loose- weave mesh must be used to the maximum extent practicable. All equipment used in waters of the U.S. must be inspected for fluid leaks and invasive species prior to use on a project. All fluid leaks shall be repaired and cleaned prior to use or when discovered, or if the fluid leak can't be repaired, the equipment shall not be used on site. Equipment used in waters with the possibility of aquatic nuisance species infestation must be thoroughly cleaned and effectively decontaminated before they are used on the project. 2022 Construction General Permit (CGP) Page 83 Vegetation should be protected except where its removal is necessary for completion of the work. Locations disturbed by construction activities should be revegetated with appropriate native vegetation in a manner that optimizes plant establishment for the specific site. Revegetation may include topsoil replacement, planting, seeding, fertilization, liming, and weed-free mulching, as necessary. Where practical, stockpile weed- seed-free topsoil and replace it on disturbed areas. All revegetation materials, including plants and plant seed shall be on site or scheduled for delivery prior to or upon completion of the earth moving activities. Activities may not result in any unconfined discharge of liquid cement into waters of the U.S. Grouting riprap must occur under dry conditions with no exposure of wet concrete to the waterbody. Activities that may result in a point source discharge shall occur during seasonal low flow or no flow periods to the extent practicable. The placement of material (discharge) for the construction of new dams is not certified, except for stream restoration projects. Any decision-maker that is required under 7.0 of the CGP to prepare a Stormwater Pollution Prevention Plan (SWPPP), must submit an electronic copy of the SWPPP to the Blackfeet Environmental Office at least 30 days before construction starts for review and approval. Any modifications to the SWPPP should be submitted to the Blackfeet Environmental Office. Any Decision-maker required under Part 1.4 of the CGP to submit a Notice of Intent (NOI) to EPA for coverage under the CGP, must submit a copy of the NOI to the Blackfeet Environmental Office within three business days of submittal to EPA. Additionally, a copy of the Notice of Termination (NOT) must be provided within three business days after electronic confirmation is received from EPA that the NOT has been accepted. The NOI and NOT must be provided to the following address Gerald Wagner, Blackfeet Environmental Office Director. 62 Hospital Drive, Browning, MT 59417 beo.director@gmail.com Fort Peck Tribes. Any Decision-maker required under Part 1.4 of the CGP to submit a Notice of Intent (NOI) to EPA for coverage under the CGP, must submit a copy of the NOI to the Fort Peck Tribes Office of Environmental Protection within three business days of submittal to EPA. Additionally, a copy of the Notice of Termination (NOT) must be provided within three business days after electronic confirmation is received from EPA that the NOT has been accepted. The NOI and NOT must be provided to the following address: Martina Wilson, Office of Environmental Protection Director 501 Medicine Bear Rd Poplar, MT 59255 martinawilson@fortpecktribes.net Any Decision-maker that is required under Part 7.0 of the CGP to prepare a Stormwater Pollution Prevention Plan (SWPPP), must submit an electronic copy of the SWPPP to the Fort Peck Tribes Office of Environmental Protection at least 30 days before construction starts for review and approval. Any modifications to the 2022 Construction General Permit (CGP) Page 84 SWPPP should be submitted to the Fort Peck Tribes Office of Environmental Protection. Any Decision-maker that is required under Part 8.0 of the CGP to submit a weekly, bi-weekly, and/or annual report to EPA, must submit an electronic copy of the annual report to the Fort Peck Tribes Office of Environmental Protection within three business days after submittal to EPA. 9.9 EPA REGION 9 9.9.1 CAR10I000 Indian country within the State of California Morongo Band of Mission Indians A copy of the Stormwater Pollution Prevention Plan (SWPPP) must be submitted (either mailed or electronically) to the MEPD no less than thirty (30) days before commencing construction activities: Morongo Band of Mission Indians Environmental Protection Department 12700 Pumarra Road Banning, CA 92220 Email: epd@morongo‐nsn.gov Copies of the Notice of Intent (NOI) and the Notice of Termination (NOT) must be sent to the MEPD at the same time they are submitted to EPA. Operators of an “emergency‐related project” must submit notice to the MEPD within twenty‐ four (24) hours after commencing construction activities. Spills, leaks, or unpermitted discharges must be reported to the MEPD within twenty‐four (24) hours of the incident, in addition to the reporting requirements of the CGP. Projects utilizing cationic treatment chemicals (as defined in Appendix A of the CGP) within the Morongo Reservation are not eligible for coverage under this certification of the CGP. Facilities covered under the CGP will be subject to compliance inspections by MEPD staff, including compliance with final site stabilization criteria prior to submitting an NOI [EPA assumes this intended to refer to an NOT]. 9.9.2 GUR100000 Island of Guam For purposes of this Order, the term "Project Proponent" shall mean U.S. Environmental Protection Agency, and its agents, assignees, and contractors. For purposes of this Order, the permit "Operator” shall mean any party associated with a construction project that meets either of the following two criteria: The party has operational control over construction plans and specifications, including the ability to make modifications to those plans and specifications (e.g. in most cases this is the owner of the site); or The party has day-to-day operational control of those activities at a project that are necessary to ensure compliance with the permit conditions (e.g., they are authorized to direct workers at a site to carry out activities required by the permit; in most cases this is the general contractor of the project). 2022 Construction General Permit (CGP) Page 85 Subcontractors generally are not considered operators for the purposes of this permit. The Project Proponent shall enforce the proposed 2022 CGP and ensure that the Operator complies with the conditions of the permit at all times.107 (40 CFR §121.11(c)) 107 By incorporating this condition into the permit, EPA acknowledges receipt of Guam’s certification conditions. All submittals required by this Order shall be sent to the Guam Environmental Protection Agency Attn: 401 Federal Permit Manager, Non-Point Source Program, EMAS Division, 3304 Mariner Avenue, Bldg. 17-3304, Barrigada, Guam 96913, AND via email to jesse.cruz@epa.guam.gov. The submittals shall be identified with WQC Order #2021- 04 and include the COP Permit Number, certifying representative's name, title, mailing address and phone number. (§51060)(4) 2017 GWQS) A copy of the Operator's signed Stormwater Pollution Prevention Plan (SWPPP) and signed Notice of Intent (NOI) and Notice of Termination (NOT) submitted to EPA for review and approval, shall concurrently be submitted to Guam EPA, consistent with condition A4. Coordination with Guam EPA is encouraged when the receiving water(s) for the proposed discharge is/are being identified. (§10105.B.5.d.) GSESCR; (§51060)(4) 2017 GWQS) The Operator must comply with the conditions and requirements set forth in 22 GAR 10, Guam Soil Erosion and Sediment Control Regulations (GSESCR). Before submitting the NOT to EPA, Operators shall comply with GSESC regulations at §10105.B10. (Stabilization of Affected Areas) and §10107.B. {Final Inspection and Approval) All operators/owners shall comply with the general design criteria for best management practices (BMPs) acceptable for meeting the Construction and Post- construction stormwater criteria in the 2006 CNMI and Guam Stormwater Management Manual. (E.O. 2012-02) Operating reports and monitoring and analytical data (e.g. Discharge Monitoring Reports (DMRs), follow-up monitoring reports, Exceedance Reports for Numerical Effluent Limits, etc.) submitted to EPA shall be concurrently submitted to Guam EPA, consistent with condition A4. §51060)(4) 2017 GWQS The Operators who install a sediment basin or similar impoundment shall maintain the storage capacity of five thousand cubic feet {5,000 cu. ft.) per acre of project area tributary to the basin. (§10105.B.5.i.) GSESCR (1) This Order does not authorize EPA to qualify Rainfall Erosivity Waivers to stormwater discharges associated with small construction activities (i.e. 1-5 acres). Operators are required to apply for an NOI for those projects eligible for coverage under the proposed 2022 CGP. An Erosion and Sediment Control Plan is required for every site that would be covered by the proposed 2022 CGP. (22 GAR §10104) The average annual rainfall for Guam and the CNMI exceeds I00 inches per year in many locations. These climatic conditions combined with the region's unique limestone, volcanic geologic formations, sensitive water resources and significant land 2022 Construction General Permit (CGP) Page 86 development forces make stormwater discharges a very significant environmental and economic issue. (2006 CNMJ/Guam Stormwater Management Manual) E.O. 2012-02 (2) This Order does not authorize EPA to approve a Sediment TMDL Waiver for the Ugum River. Operators of construction activities eligible for a TMDL Waiver in lieu of coverage under the proposed 2022 CGP, shall submit a complete and accurate waiver certification as described in C.2., Appendix C - (Small Construction Waivers) to Guam EPA per condition A4., prior to notifying EPA of its intention to obtain a waiver. §51060)(4) 2017 GWQS The Project Proponent shall submit to Guam EPA a signed Statement of Understanding of Water Quality Certification Conditions.108 (see Attachment A for an example) per condition A4. §51060)(4) 2017 GWQS 108 By incorporating this condition into the permit, EPA acknowledges receipt of Guam’s certification conditions. The Operator shall comply with applicable provisions of the Guam Pesticides Act of2007 (10 GCA Chapter 50) and implementing regulations at Title 22 GAR Chapter 15 for any use and application of pesticides. Point source discharge(s) to waterbodies under the jurisdiction of Guam EPA must be consistent with the antidegradation policy in 22 GAR §510l(b). The operator shall carry out construction activities in such a manner that will not violate Guam Water Quality Standards (GWQS). Proposed 2022 CGP discharges are prohibited as follows: In Marine Waters, Category M-1 Excellent 22 GAR Chapter 5 §5102(b)(l); and In Surface Waters, Category S-1 High 22 GAR Chapter 5 §5102(c)(l) In addition to complying with construction dewatering requirements in Part 2.4 and site inspection requirements for all areas where construction dewatering is taking place in Part 4 of the proposed 2022 CGP, Operators shall comply with all dewatering conditions and requirements set forth in 22 GAR 7, Water Resources Development and Operating Regulations, to include securing Guam EPA permits prior to any dewatering activities. The Operator shall develop and implement a Spill Prevention and Containment Plan. The Operator shall have adequate and appropriate spill response materials on hand to respond to emergency release of oil, petroleum or any other material into waters of the territory. Any unpermitted discharge into territorial waters or onto land with a potential for entry into territorial waters, is prohibited. If this occurs, the Operator shall immediately take the following actions: Cease operations at the location of the violation or spill. Assess the cause of the water quality problem and take appropriate measures to correct the problem and/or prevent further environmental damage. Notify Guam EPA of the failure to comply. All petroleum spills shall be reported immediately to: 2022 Construction General Permit (CGP) Page 87 (a) Guam's Emergency 911 system (b) Guam EPA's 24-Hour Spill Response Team at (671) 888-6488 or during working hours (671) 300-4751 (c) US Coast Guard Sector Guam (671) 355-4824 (d) National Response Center 1-800-424-8802 Submit a detailed written report to Guam EPA within five days of noncompliance that describes the nature of the event corrective action taken and/or planned, steps to be taken to prevent a recurrence, results of any samples taken, and any other pertinent information. Compliance with this condition does not relieve the Operator from responsibility to maintain continuous compliance with the terms and conditions of this Order or the resulting liability from failure to comply. Submittal or reporting of any of this information does not provide relief from any subsequent enforcement actions for unpermitted discharges to waters of the United States. This Order is valid for five (5) Years from Date of Certification, unless otherwise approved by the Guam EPA Administrator. The Operator shall be required to adhere to the current Guam Coral Spawning Moratorium dates for both hard and soft corals where in-water activities and/or construction activity in close proximity with marine waters may impair water quality. These dates can be obtained from the Guam Department of Agriculture, Division of Aquatic and Wildlife Resources, or the NOAA NMFS Pacific Islands Regional Office Habitat Conservation Division. The Operator shall provide notice to Guam EPA consistent with Condition A4: (a) Immediately upon discovery of noncompliance with the provisions of this Order. A Notice of Violation/Work Stop Order will be issued if certification conditions are not adhered to or when significant or sustained water quality degradation occurs. Work or discharge shall be suspended or halted until the Operator addresses environmental problems/concerns to Guam EPA's satisfaction. Guam EPA may also levy penalties and fines (10 GCA §47111). Invalidity or enforceability of one or more provisions of this certification shall not affect any other provision of this certification. 9.10 EPA REGION 10 9.10.1 IDR10I000 Indian country within the State of Idaho, except Duck Valley Reservation lands (see Region 9) Shoshone-Bannock Tribes Copies of the following information must be sent to the SBT-WRD: (a) Notice of Intents (NOI) The Notice of Intent shall be forwarded to the SBT-WRD within thirty (30) days of receipt of submitting NOI to the USEPA. 2022 Construction General Permit (CGP) Page 88 Shoshone-Bannock Tribes Water Resources Department PO Box 306 Pima Drive Fort Hall, ID 83203 Phone: (208) 239-4582 Fax: (208) 239-4592 Or Email ctanaka@sbtribes.com If requested by the SBT-WRD, the permittee must submit a copy of the SWPPP to SBT- WRD within fourteen (14) days of the request. 9.10.2 ORR10I000 Indian country within the State of Oregon, except Fort McDermitt Reservation lands (see Region 9) Confederated Tribes of Coos, Lower Umpqua, and Siuslaw No activities allowed under the CGP shall result in the degradation of any Tribal waters or affect resident aquatic communities or resident or migratory wildlife species at any life stage. The operator shall be responsible for achieving compliance with CTCLUSI Water Quality Standards and all other tribal codes, regulations, and laws as they exist at the time that the permit is submitted. The operator shall submit a copy of the Notice of lntent (NOI) to be covered by the general permit to the CTCLUSI Water Quality Program before, or at the same time as, it is submitted to EPA. The operator shall be responsible for submitting all Stormwater Pollution Prevention Plans (SWPPP) required under this general permit to the CTCLUSI Water Quality Program for review and determination that the SWPPP is sufficient to meet Tribal Water Quality Standards, prior to the beginning of any discharge activities taking place. The operator shall be responsible for reporting an exceedance to Tribal Water Quality Standards to the CTCLUSI Water Quality Program at the same time it is reported to EPA. The THPO will be provided 30 days to comment on the APE as defined in the permit application. If the project is an undertaking, a cultural resource assessment must occur. All fieldwork must be permitted by the THPO (as appropriate), conducted by qualified personnel (as outlined by the Secretary of Interior's Standards and Guidelines; http://www.nps.gov/history/local-law/arch_stnds_O.htm) and documented according to Oregon Reporting Standards (Reporting_Guidelines.pdf) (oregon.gov). The resulting report must be submitted to the THPO and the THPO must concur with the finding of effect and recommendations before any ground disturbing work can occur. The THPO requires 30 days to review all reports. The operator must obtain THPO concurrence in writing. If historic properties are present, this written concurrence will outline measures to be taken to prevent or mitigate adverse effects to historic properties. Confederated Tribes of the Umatilla Indian Reservation The operator shall be responsible for achieving compliance with the 2022 Construction General Permit (CGP) Page 89 Confederated Tribes of the Umatilla Indian Reservation’s (CTUIR) Water Quality Standards. The operator shall submit a copy of the Notice of Intent (NOI) to be covered by the general permit to the CTUIR Water Resources Program at the address below, at the same time it is submitted to EPA. The operator shall be responsible for submitting all Stormwater Pollution Prevention Plans (SWPPP) required under this general permit to the CTUIR Water Resources Program for review and determination that the SWPPP is sufficient to meet Tribal Water Quality Standards, prior to the beginning of any discharge activities taking place. The operator shall be responsible for reporting an exceedance to Tribal Water Quality Standards to the CTUIR Water Resources Program at the same time it is reported to EPA. Confederated Tribes of the Umatilla Indian Reservation Water Resources Program 46411 Timíne Way Pendleton, OR 97801 (541) 429-7200 The THPO will be provided 30 days to comment on the APE as defined in the permit application. If the project is an undertaking, a cultural resource assessment must occur. All fieldwork must be permitted by the Tribal Historic Preservation Office (as appropriate), conducted by qualified personnel (as outlined by the Secretary of Interior’s Standards and Guidelines; http://www.nps.gov/history/local- law/arch_stnds_0.htm) and documented according to Oregon Reporting Standards (Reporting_Guidelines.pdf (oregon.gov). The resulting report must be submitted to the THPO and the THPO must concur with the finding of effect and recommendations before any ground disturbing work can occur. The THPO requires 30 days to review all reports. The operator must obtain THPO concurrence in writing. If historic properties are present, this written concurrence will outline measures to be taken to prevent or mitigate adverse effects to historic properties. 9.10.3 WAR10F000 Areas in the State of Washington, except those located on Indian country, subject to construction activity by a Federal Operator For purposes of this Order, the term “Project Proponent” shall mean those that are seeking coverage under this permit, and its agents, assignees and contractors. The Federal Agency shall mean the US Environmental Protection Agency. The Federal Agency shall enforce the permit and ensure that the Project Proponent complies with the conditions of the permits at all times. Failure of any person or entity to comply with this Certification may result in the issuance of civil penalties or other actions, whether administrative or judicial, to enforce the terms of this Certification. The Certification conditions within this Order must be incorporated into EPA’s final NPDES permit. Per 40 CFR 121.10(a), all certification conditions herein that satisfy the 2022 Construction General Permit (CGP) Page 90 requirements of 40 CFR 121.7(d) must be incorporated into the permit. Per 40 CFR 121.10(b), the permit must clearly identify all certification conditions. This Certification does not authorize exceedances of water quality standards established in chapter 173-201A WAC. Discharges from construction activity must not cause or contribute to violations of the Water Quality Standards for Surface Water of the State of Washington (chapter 173- 201A WAC), Ground Water Quality Standards (chapter 173- 200 WAC), Sediment Management Standards (chapter 173-204 WAC), and standards in the EPA’s Revision of certain Federal water quality criteria applicable to Washington (40 CFR 131.45). Discharges that do not comply with these standards are prohibited. Prior to discharge of stormwater and non-stormwater to waters of the State, the Permittee must apply all known, available, and reasonable methods of prevention, control, and treatment (AKART). This includes the preparation and implementation of an adequate Stormwater Pollution Prevention Plan (SWPPP), with all appropriate Best Management Practices (BMPs) installed and maintained in accordance with the SWPPP and the terms and conditions of the permit. BMPs must be consistent with: (a) The Stormwater Management Manual for Western Washington (most current approved edition at the time this permit was issued), for sites west of the crest of the Cascade Mountains; or (b) The Stormwater Management Manual for Eastern Washington (most current approved edition at the time this permit was issued), for sites east of the crest of the Cascade Mountains; or (c) Revisions to either manual, or other stormwater management guidance documents or manuals which provide equivalent level of pollution prevention, that are approved by Ecology and incorporated into this permit in accordance with the permit modification requirements of WAC 173-226-230. (For purposes of this section, the stormwater manuals listed in Appendix 10 of the Phase I Municipal Stormwater Permit are approved by Ecology); or (d) Documentation in the SWPPP that the BMPs selected provided an equivalent level of pollution prevention, compared to the applicable stormwater management manuals, including: − The technical basis for the selection of all stormwater BMPs (scientific, technical studies, and/or modeling) that support the performance claims for the BMPs being selected. − An assessment of how the selected BMP will satisfy AKART requirements and the applicable federal technology-based treatment requirements under 40 CFR part 125.3. The Stormwater Management Manuals for Eastern and Western Washington can be found at: https://ecology.wa.gov/Regulations-Permits/Guidance- technical-assistance/Stormwater-permittee-guidance-resources/Stormwater- manuals. An adequate SWPPP must include a narrative and drawings. All BMPs must be clearly referenced in the narrative and marked on the drawings. The SWPPP 2022 Construction General Permit (CGP) Page 91 narrative must include documentation to explain and justify the pollution prevention decisions made for the project. Documentation must include: (a) Information about existing site conditions (topography, drainage, soils, vegetation, etc.). (b) Potential erosion problem areas. (c) The 13 elements of a SWPPP, including BMPs used to address each element. Unless site conditions render the element unnecessary and the exemption is clearly justified in the SWPPP, the 13 elements are as follows: − Preserve Vegetation/Mark Clearing Limits − Establish Construction Access − Control Flow Rates − Install Sediment Controls − Stabilize Soils − Protect Slopes − Protect Drain Inlets − Stabilize Channels and Outlets − Control Pollutants − Control Dewatering − Maintain BMPs − Manage the Project − Protect Low Impact Development (LID) BMPs Discharges of stormwater and authorized non-stormwater must be monitored for turbidity (or transparency) and, in the event of significant concrete work or engineered soils, pH must also be monitored. As applicable based on project specifics, monitoring, benchmarks, and reporting requirements contained in Condition S.4. (pp.10-16) of the Washington State Construction Stormwater General Permit, effective January 1, 2021, shall apply. Discharges to segments of waterbodies listed as impaired by the State of Washington under Section 303(d) of the Clean Water Act for turbidity, fine sediment, phosphorus, or pH must comply with the following numeric effluent limits: Parameter identified in 303(d) listing Parameter Sampled Unit Analytical Method Numeric Effluent Limit • Turbidity • Fine Sediment • Phosphorus Turbidity NTU SM2130 25 NTUs at the point where the stormwater is discharged from the site. High pH pH su pH meter In the range of 6.5 – 8.5 All references and requirements associated with Section 303(d) of the Clean Water Act mean the most current EPA-approved listing of impaired waters that exists on the 2022 Construction General Permit (CGP) Page 92 effective date of the permit, or the date when the operator’s complete permit application is received by EPA, whichever is later. The EPA approved WQ Assessment can be found at: https://ecology.wa.gov/Water- Shorelines/Water-quality/Water-improvement/Assessment-of-state-waters-303d Discharges to a waterbody that is subject to a Total Maximum Daily Load (TMDL) for turbidity, fine sediment, high pH, or phosphorus must be consistent with the TMDL. Where an applicable TMDL sets specific waste load allocations or requirements for discharges covered by this permit, discharges shall be consistent with any specific waste load allocations or requirements established by the applicable TMDL. Where an applicable TMDL has established a general waste load allocation for construction stormwater discharges, but no specific requirements have been identified, compliance with this permit will be assumed to be consistent with the approved TMDL. Where an applicable TMDL has not specified a waste load allocation for construction stormwater discharges, but has not excluded these discharges, compliance with this permit will be assumed to be consistent with the approved TMDL. Where an applicable TMDL specifically precludes or prohibits discharges from construction activity, the operator is not eligible for coverage under this permit. Applicable TMDL means a TMDL for turbidity, fine sediment, high pH, or phosphorus which has been completed and approved by EPA as of the effective date of the permit, or prior to the date of the operator’s complete application for permit coverage is received by EPA, whichever is later. Discharges to waters of the state from the following activities are prohibited: Concrete wastewater. Wastewater from washout and clean-up of stucco, paint, form release oils, curing compounds and other construction materials. Process wastewater as defined by 40 Code of Federal Regulations (CFR) 122.2. Slurry materials and waste from shaft drilling, including process wastewater from shaft drilling for construction of building, road, and bridge foundations unless managed to prevent discharge to surface water. Fuels, oils, or other pollutants used in vehicle and equipment operation and maintenance. Soaps or solvents used in vehicle and equipment washing. Wheel wash wastewater, unless managed to prevent discharge to surface water. Discharges from dewatering activities, including discharges from dewatering of trenches and excavations, unless managed according to appropriate controls described within the permit. This Certification is valid until the expiration date including any administrative extension or termination date of the NPDES 2022 Construction General Permit. (40 CFR § 122.46) 2022 Construction General Permit (CGP) Page 93 The Federal Agency shall enforce and the Project Proponent must comply with all the reporting and notification conditions of the NPDES 2022 Construction General Permit in order to comply with this Order and the certification conditions herein (40 CFR § 121.11). You have a right to appeal this Order to the Pollution Control Hearing Board (PCHB) within 30 days of the date of receipt of this Order. The appeal process is governed by chapter 43.21B RCW and chapter 371-08 WAC. “Date of receipt” is defined in RCW 43.21B.001(2). To appeal you must do all of the following within 30 days of the date of receipt of this Order: • File your appeal and a copy of this Order with the PCHB (see addresses below). Filing means actual receipt by the PCHB during regular business hours. • Serve a copy of your appeal and this Order on Ecology in paper form - by mail or in person (see addresses below). E-mail is not accepted. You must also comply with other applicable requirements in chapter 43.21B RCW and chapter 371-08 WAC. ADDRESS AND LOCATION INFORMATION Street Addresses Mailing Addresses Department of Ecology Attn: Appeals Processing Desk 300 Desmond Drive SE Lacey, WA 98503 Department of Ecology Attn: Appeals Processing Desk PO Box 47608 Olympia, WA 98504-7608 Pollution Control Hearings Board 1111 Israel RD SW STE 301 Tumwater, WA 98501 Pollution Control Hearings Board PO Box 40903 Olympia, WA 98504-0903 CONTACT INFORMATION Please direct all questions about this Order to: Noel Tamboer Department of Ecology P.O. Box 47600 Olympia, WA 98503-7600 (360) 701-6171 noel.tamboer@ecy.wa.gov 9.10.4 WAR10I000 Indian country within the State of Washington Lummi Nation 2022 Construction General Permit (CGP) Page 94 This certification does not exempt and is provisional upon compliance with other applicable statutes and codes administered by federal and Lummi tribal agencies. Pursuant to Lummi Code of Laws (LCL) 17.05.020(a), the operator must also obtain a land use permit from the Lummi Planning Department as provided in Title 15 of the Lummi Code of Laws and regulations adopted thereunder. Pursuant to LCL 17.05.020(a), each operator shall develop and submit a Storm Water Pollution Prevention Plan to the Lummi Water Resources Division for review and approval by the Water Resources Manager prior to beginning any discharge activities. Pursuant to LCL Title 17, each operator shall be responsible for achieving compliance with the Water Quality Standards for Surface Waters of the Lummi Indian Reservation (Lummi Administrative Regulations [LAR] 17 LAR 07.010 through 17 LAR 07.210 together with supplements and amendments thereto). Each operator shall submit a signed copy of the Notice of lntent (NOI) to the Lummi Water Resources Division at the same time it is submitted electronically to the Environmental Protection Agency (EPA) and shall provide the Lummi Water Resources Division the acknowledgement of receipt of the NOI from the EPA and the associated NPDES tracking number provided by the EPA within 7 calendar days of receipt from the EPA. Each operator shall submit a signed copy of the Notice of Termination (NOT) to the Lummi Water Resources Division at the same time it is submitted electronically to the EPA and shall provide the Lummi Water Resources Division the EPA acknowledgement of receipt of the NOT. Storm Water Pollution Prevention Plans, Notice of Intent, Notice of Termination and associated correspondence with the EPA shall be submitted to: Lummi Natural Resources Department ATTN: Water Resources Manager 2665 Kwina Road Bellingham, WA 98226-9298 Port Gamble S’Klallam Tribe No discharge from the project site shall cause exceedances of Port Gamble S’Klallam Surface Water Quality Standards narrative or numeric criteria in Tribal waters. This includes activities outside of Tribal lands that occur upstream of Tribal waters. (a) If any exceedance of these water quality standards occurred, the Natural Resources Department shall be notified immediately. • The Department shall additionally be provided a complete draft of the proposed corrective action within a reasonable timeframe and its approval will be required before any corrective action may be taken. Operators performing activities under the CGP that may affect Tribal waters will require a permit and shall submit their plans to the Port Gamble S’Klallam Natural Resources Department for review. • The Department has the right to require conditions outside of this Water Quality Certification prior to permit approval. 2022 Construction General Permit (CGP) Page 95 No activities allowed under the CGP shall result in the degradation of any Tribal waters or change in designated uses. No activities allowed under the CGP shall affect resident aquatic communities or resident/migratory wildlife species at any life stage. • Biological assessment methods used to determine the effect of an activity allowed under the CGP shall be approved by the PGST Natural Resources Department. No activities allowed under the CGP shall be conducted within wetland and stream buffer zones, nor shall said activities affect in any way wetland or stream buffers, as defined by PGST Law and Order Code 24.08.01(c). Concentrations for substances listed within the table in Water Quality Standards for Surface Waters sec. 7(7) shall not be exceeded by activities allowed under the CGP. Spokane Tribe of Indians Pursuant to Tribal Law and Order Code (TLOC) Chapter 30 each operator shall be responsible for achieving compliance with the Surface Water Quality Standards of the Spokane Tribe. The operator shall notify the Spokane Tribe, Water Control Board (WCB) of any spills of hazardous material and; Each operator shall submit a signed hard copy of the Notice of lntent (NOI) to the WCB at the same time it is submitted to EPA. The permittee shall allow the Tribal Water Control Board or its designee to inspect and sample at the construction site as needed. Each operator shall submit a signed copy of the Notice of Termination (NOT) to the WCB at the same time it is submitted to EPA The correspondence address for the Spokane Tribe Water Control Board is: Water Control Board c/o Brian Crossley PO Box480 Wellpinit WA 99040 (509)626-4409 crossley@spokanetribe.com Swinomish Tribe Owners and operators seeking coverage under this permit must submit a copy of the Notice of Intent (NOI) to the DEP at the same time the NOI is submitted to EPA. Owners and operators must also submit to the DEP changes in NOI and/or Notices of Termination at the same time they are submitted to EPA. Owners and operators seeking coverage under this permit must also submit a Stormwater Pollution Prevention Plan to the DEP for review and approval by DEP prior to beginning any discharge activities. Tulalip Tribes Submission of NOI: Copies of the Notice of Intent (NOI),) Certification shall be submitted to the Tribe's Natural Resources Department to notify the Tribes of the 2022 Construction General Permit (CGP) Page 96 pending project and in order for the Tribes to review the projects potential impacts to endangered or threatened species. Submission of SWPPP: A copy of the Stormwater Pollution Plans (SWPPPs) shall be submitted to the Tribe's Natural Resources Department along with the NOI during the 30 day waiting period. Submission of Monitoring Data and Reports: The results of any monitoring required by this permit and reports must be sent to the Tribe's Natural Resources Depa1tment, The Tulalip Tribes are federally recognized successors in the interest to the Snohomish, Snoqualmie, Skykomish, and other allied tribes and bands signatory to the Treaty of Point Elliott. including a description of the corrective actions required and undertaken to meet effluent limits or benchmarks (as applicable). Authorization to Inspect: The Tribe's Natural Resources Department may conduct an inspection of any facility covered by this permit to ensure compliance with tribal water quality standards. The Department may enforce its certification conditions. Submission of Inspection Reports: Inspection reports must be sent to the Tribe's Natural Resources Department, including a description of the corrective actions required and undertaken to meet effluent limits or benchmarks (as applicable). Permits on-site: A copy of the pe1mit shall be kept on the job site and readily available for reference by the construction supervisor, construction managers and foreman, and Tribal inspectors. Project Management: The applicant shall ensure that project managers, construction managers and foreman, and other responsible parties have read and understand conditions of the permit, this certification, and other relevant documents, to avoid violations or noncompliance with this certification. Emergency Spill Notification Requirements: In the event of a spill or the contractor shall immediately take action to stop the violation and correct the problem, and immediately repo1t spill to the Tulalip Tribes Police Department (425) 508-1565. Compliance with this condition does not relieve the applicant from responsibility to maintain continuous compliance with the tem1S and conditions of this certification or the resulting liability from failure to comply. Discharges to CERCLA Sites: This permit does not autho1ize direct stormwater discharges to certain sites undergoing remedial cleanup actions pursuant to the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) unless first approved by the appropriate EPA Regional office. In the case of the Tulalip Landfill site (WAD980639256), the Tulalip Tribes also requests notification by the facility and consultation with EPA prior to discharge. Contaminants at this site may include but are not limited to: dioxins, furans, arsenic, copper, lead, zinc, 4- methyl-phenol, Hex-CB, HPAHs, PCBs, PCE, cadmium, mercury, and LPAHs. Discharge-related Activities that have Potential to Cause an Adverse Effect on Historic Properties: Installation of stormwater controls that involve subsurface disturbances may potentially have an adverse impact on historic properties. 2022 Construction General Permit (CGP) Page 97 Procedures detailed in the permit shall be completed. Richard Young, of the Tulalip Tribe's Cultural Resources Department shall be contacted prior to initiating discharge- related activities that may have an impact on historic properties. His contact information is (360) 716-2652, ryoung@tulaliptribes-nsn.gov. Invalidation: This certification will cease to be valid if the project is constructed and/or operated in a manner not consistent with the project description contained in the permit. This certification will also cease to be valid and the applicant must reapply with an updated application if info1mation contained in the permit is voided by subsequent submittals. Modification: Nothing in this certification waives the Tulalip Tribes of Washington's authority to issue modifications to this ce1iification if additional impacts due to operational changes are identified, or if additional conditions are necessary to protect water quality or further protect the Tribal Communities interest. incorporation by reference: TI1is certification does not exempt the applicant from compliance with other statues and codes administered by the Tribes, county, state and federal agencies. Compliance with Tribe's I996 Water Quality Standards: Each permittee shall be responsible for controlling discharges and achieving compliance with the T1ibe's Water Quality Standards. Compliant with Tulalip Tribes Tidelands Management Policy: Permittee shall be responsible for achieving compliance with applicable sections of the Tulalip Tribe's Tidelands Management Policy. (Tulalip Tribal Code Title 8 Chapter 8.30). Compliant with Tulalip Tribes Environmental Infractions: Permittee shall be responsible for achieving compliance with applicable sections of the Tulalip Tribe's Environmental Infractions. (Tulalip Tribal Code Title 8 Chapter 8.20). Where to Submit information and for further Coordination: All requested documents should be sent to the: Tulalip Tribes Natural Resources Environmental Department c/o Kurt Nelson and Valerie Streeter, 6704 Marine Drive, Tulalip, Washington 98271. For further 40 I Certification coordination with the Tulalip Tribes Natural Resources Department, please contact Mr. Kurt Nelson (360) 716-4617 knelson@tu1aliptribes- nsn.gov. 6406 Marine Dr., Tulalip WA 98271. Makah Tribe The permittee shall be responsible for meeting any additional permit requirements imposed by EPA necessary to comply with the Makah Tribe’s Water Quality Standards if the discharge point is located within the Makah’s U&A treaty reserved areas. Each permittee shall submit a copy of the Notice of Intent (NOI) to be covered by the general permit to Makah Fisheries Management, Water Quality Department at the address listed below at the same time it is submitted to the EPA. Makah Water Quality Makah Fisheries Management (MFM) ray.colby@makah.com 2022 Construction General Permit (CGP) Page 98 PO Box 115 Neah bay, WA 98357 All supporting documentation and certifications in the NOI related to coverage under the general permit for Endangered Species Act purposes shall be submitted to the Tribe’s Habitat programs for their review. If EPA requires coverage under an individual or alternative permit, the permittee shall submit a copy of the permit to Assistant Fisheries Director, ray.colby@makah.com. The permittee shall submit all Stormwater Pollution Prevention plan (SWPP) to MFM for review and approval prior to beginning any activities resulting in a discharge to Makah tribal waters. The permittee shall notify Ray Colby, ray.colby@makah.com (360) 645-3150 prior to conducting inspections at construction sites generating stormwater discharges to tribal waters. The operator shall treat dewatering discharges with controls necessary to minimize discharges of pollutants to surface waters, or ground waters, and from stormwater runoff onsite from excavations, trenches, foundations, or storage areas. To the extent feasible, at all points where dewatering is discharged, comply with the velocity dissipation using check dams, sediment traps, and grouted outlets. Puyallup Tribe of Indians The permittee shall be responsible for meeting any additional permit requirements imposed by EPA necessary to comply with the Puyallup Tribe’s antidegradation procedures. Each permittee shall submit a copy of the Notice of Intent (NOI) to be covered by the general permit to Char Naylor, Tribal Water Quality Manager at the following e-mail address: (char.naylor@puyalluptribe-nsn.gov) at the same time it is submitted to EPA. All supporting documentation and certifications in the NOI related to coverage under the general permit for Endangered Species Act purposes shall be submitted to Char Naylor, Tribal Water Quality Manager/Assistant Fisheries Director (char.naylor@puyalluptribe-nsn.gov) for review. If EPA requires coverage under an individual or alternative permit, the permittee shall submit a copy of the permit to Char Naylor at the email address listed above. The permittee shall submit all stormwater pollution prevention plans to Char Naylor for review and approval prior to beginning any activities resulting in a discharge to Puyallup tribal waters. The permittee shall contact Brandon Reynon (Brandon.reynon@puyalluptribe-nsn- gov), Tribe’s Historic Preservation Officer or Jennifer Keating (Jennifer.keating@puyalluptribe-nsn.gov), Tribe’s Assistant Historic Preservation Officer regarding historic properties and cultural resources. To minimize the discharge of pollutants to groundwater or surface waters from stormwater that is removed from excavations, trenches, foundations, vaults, or 2022 Construction General Permit (CGP) Page 99 other storage areas, treat dewatering discharges with controls necessary to minimize discharges of pollutants. Examples of appropriate controls include sediment basins or sediment traps, sediment socks, dewatering tanks, tube settlers, weir tanks, and filtration systems (e.g., bag or sand filters) that are designed to remove sediment. To the extent feasible, utilize vegetated, upland areas of the site to infiltrate dewatering water before discharge. At all points where dewatering water is discharged, utilize velocity dissipation controls. Examples of velocity dissipation devices include check dams, sediment traps, riprap, and grouted riprap at outlets. The permittee shall provide and maintain natural buffers to the maximum extent possible (and/or equivalent erosion and sediment controls) when tribal waters are located within 100 feet of the boundaries. If infeasible to provide and maintain an undisturbed 100 foot natural buffer, erosion and sediment controls to achieve the sediment load reduction equivalent to a 100-foot undisturbed natural buffer shall be required. Appendix C – Copy of NOI and EPA Authorization email 1 Jared Kelly From:no-reply@epacdx.net Sent:Tuesday, November 1, 2022 4:31 PM Subject:EPA NeT CGP Forms Certified: Headrace Levee Retaining Wall Restoration, NPDES ID: MAR1004CH 2022‐11‐01 Dear NeT User, William Witten successfully certified the following forms within NeT CGP: NPDES ID Form Type Operator Project/Site Name City, State Targeted End of Review MAR1004CH NOI Cutlery Building Associates Headrace Levee Retaining Wall Restoration Northampton , MA 11/15/2022 A copy of the submission can be found here. If your NOI or Change‐NOI is subject to review, your coverage under the CGP begins at the conclusion of the 14‐day waiting period, unless otherwise notified that your coverage has been delayed or denied. You will receive an email informing you once your coverage under the CGP is active. Additionally you can view your submission history and obtain a copy of the form you submitted within the NPDES Electronic Reporting Tool (NeT) or download via Permit Search. If you were the certifier of this form, a copy of your submission is also available on the Submission History tab of your EPA Central Data Exchange (CDX) account. If you have questions about this email or about NeT CGP, please refer to NeT Support or e‐mail NPDESereporting@epa.gov for assistance. This is an automated notification; please do not reply to this email. Page 1 of 4 Page 2 of 4 Page 3 of 4 Page 4 of 4 Appendix D – Copy of Inspection Form 2022 Construction General Permit Site Inspection Report Project Name: _______________________________________ NPDES ID Number: ________________________________ Page 1 of 7 Section A – General Information (If necessary, complete additional inspection reports for each separate inspection location.) Inspector Information Inspector Name: Title: Company Name: Email: Address: Phone Number: Inspection Details Inspection Date: Inspection Location: Inspection Start Time: Inspection End Time: Current Phase of Construction: Weather Conditions During Inspection: Did you determine that any portion of your site was unsafe for inspection per CGP Part 4.5? ☐ Yes ☐ No If “Yes,” provide the following information: Location of unsafe conditions: The conditions that prevented you inspecting this location: Indicate the required inspection frequency: (Check all that apply. You may be subject to different inspection frequencies in different areas of the site.) Standard Frequency (CGP Part 4.2): ☐ At least once every 7 calendar days; OR ☐ Once every 14 calendar days and within 24 hours of the occurrence of either: • A storm event that produces 0.25 inches or more of rain within a 24-hour period, or • A snowmelt discharge from a storm event that produces 3.25 inches or more of snow within a 24-hour period Increased Frequency (CGP Part 4.3.1) (If site discharges to sediment or nutrient-impaired waters or to waters designated as Tier 2, Tier 2.5, or Tier 3): ☐ Once every 7 calendar days and within 24 hours of the occurrence of either: • A storm event that produces 0.25 inches or more of rain within a 24-hour period, or • A snowmelt discharge from a storm event that produces 3.25 inches or more of snow within a 24-hour period 2022 Construction General Permit Site Inspection Report Project Name: _______________________________________ NPDES ID Number: ________________________________ Page 2 of 7 Reduced Frequency (CGP Part 4.4): ☐ For stabilized areas: Twice during first month, no more than 14 calendar days apart; then once per month after first month until permit coverage is terminated ☐ For stabilized areas on “linear construction sites”: Twice during first month, no more than 14 calendar days apart; then once more within 24 hours of the occurrence of either: • A storm event that produces 0.25 inches or more of rain within a 24-hour period, or • A snowmelt discharge from a storm event that produces 3.25 inches or more of snow within a 24-hour period ☐ For arid, semi-arid, or drought-stricken areas during seasonally dry periods or during drought: Once per month and within 24 hours of the occurrence of either: • A storm event that produces 0.25 inches or more of rain within a 24-hour period, or • A snowmelt discharge from a storm event that produces 3.25 inches or more of snow within a 24-hour period ☐ For frozen conditions where construction activities are being conducted: Once per month Was this inspection triggered by a storm event producing 0.25 inches or more of rain within a 24-hour period? ☐ Yes ☐ No If “Yes,” how did you determine whether the storm produced 0.25 inches or more of rain? ☐ On-site rain gauge ☐ Weather station representative of site. Weather station location: Total rainfall amount that triggered the inspection (inches): Was this inspection triggered by a snowmelt discharge from a storm event producing 3.25 inches or more of snow within a 24-hour period? ☐ Yes ☐ No If “Yes,” how did you determine whether the storm produced 3.25 inches or more of snow? ☐ On-site rain gauge ☐ Weather station representative of site. Weather station location: Total snowfall amount that triggered the inspection (inches): 2022 Construction General Permit Site Inspection Report Project Name: _______________________________________ NPDES ID Number: ________________________________ Page 3 of 7 Section B – Condition and Effectiveness of Erosion and Sediment (E&S) Controls (CGP Part 2.2) (Insert additional rows if needed) Type and Location of E&S Control Conditions Requiring Routine Maintenance?1 If “Yes,” How Many Times (Including This Occurrence) Has This Condition Been Identified? Conditions Requiring Corrective Action?2, 3 Date on Which Condition First Observed (If Applicable)? Description of Conditions Observed 1. ☐ Yes ☐ No ☐ Yes ☐ No 2. ☐ Yes ☐ No ☐ Yes ☐ No 3. ☐ Yes ☐ No ☐ Yes ☐ No 4. ☐ Yes ☐ No ☐ Yes ☐ No 5. ☐ Yes ☐ No ☐ Yes ☐ No If the same routine maintenance was found to be necessary three or more times for the same control at the same location (including this occurrence), follow the corrective action requirements and record the required information in your corrective action log, or describe here why you believe the specific condition should still be addressed as routine maintenance: 1 Routine maintenance includes minor repairs or other upkeep performed to ensure that the site’s stormwater controls remain in effective operating condition, not including significant repairs or the need to install a new or replacement control. Routine maintenance is also required for specific conditions: (1) for perimeter controls, whenever sediment has accumulated to half or more the above-ground height of the control (CGP Part 2.2.3.c.i); (2) where sediment has been tracked-out from the site onto paved roads, sidewalks, or other paved areas (CGP Part 2.2.4.d); (3) for inlet protection measures, when sediment accumulates, the filter becomes clogged, and/or performance is compromised (CGP Part 2.2.10.b); and (4) for sediment basins, as necessary to maintain at least half of the design capacity of the basin (CGP Part 2.2.12.f) 2 Corrective actions are triggered only for specific conditions (CGP Part 5.1): 1. A stormwater control needs a significant repair or a new or replacement control is needed, or, in accordance with Part 2.1.4.c, you find it necessary to repeatedly (i.e., three (3) or more times) conduct the same routine maintenance fix to the same control at the same location (unless you document in your inspection report under Part 4.7.1.c that the specific reoccurrence of this same problem should still be addressed as a routine maintenance fix under 2.1.4); or 2. A stormwater control necessary to comply with the requirements of this permit was never installed, or was installed incorrectly; or 3. Your discharges are not meeting applicable water quality standards; or 4. A prohibited discharge has occurred (see CGP Part 1.3); or 5. During the discharge from site dewatering activities: a. The weekly average of your turbidity monitoring results exceeds the 50 NTU benchmark (or alternate benchmark if approved by EPA pursuant to Part 3.3.2.b); or b. You observe or you are informed by EPA, State, or local authorities of the presence of the conditions specified in Part 4.6.3.e. 3 If a condition on your site requires a corrective action, you must also fill out a corrective action log found at https://www.epa.gov/npdes/construction-general-permit-resources-tools-and-templates. See CGP Part 5.4 for more information. 2022 Construction General Permit Site Inspection Report Project Name: _______________________________________ NPDES ID Number: ________________________________ Page 4 of 7 Section C – Condition and Effectiveness of Pollution Prevention (P2) Practices and Controls (CGP Part 2.3) (Insert additional rows if needed) Type and Location of P2 Practices and Controls Conditions Requiring Routine Maintenance?1 If “Yes,” How Many Times (Including This Occurrence) Has This Condition Been Identified? Conditions Requiring Corrective Action?2, 3 Date on Which Condition First Observed (If Applicable)? Description of Conditions Observed 1. ☐ Yes ☐ No ☐ Yes ☐ No 2. ☐ Yes ☐ No ☐ Yes ☐ No 3. ☐ Yes ☐ No ☐ Yes ☐ No 4. ☐ Yes ☐ No ☐ Yes ☐ No 5. ☐ Yes ☐ No ☐ Yes ☐ No If the same routine maintenance was found to be necessary three or more times for the same control at the same location (including this occurrence), follow the corrective action requirements and record the required information in your corrective action log, or describe here why you believe the specific condition should still be addressed as routine maintenance: 2022 Construction General Permit Site Inspection Report Project Name: _______________________________________ NPDES ID Number: ________________________________ Page 5 of 7 Section D – Stabilization of Exposed Soil (CGP Part 2.2.14) (Insert additional rows if needed) Specific Location That Has Been or Will Be Stabilized Stabilization Method and Applicable Deadline Stabilization Initiated? Final Stabilization Criteria Met? Final Stabilization Photos Taken? Notes 1. ☐ Yes ☐ No If “Yes,” date initiated: ☐ Yes ☐ No If “Yes,” date criteria met: ☐ Yes ☐ No 2. ☐ Yes ☐ No If “Yes,” date initiated: ☐ Yes ☐ No If “Yes,” date criteria met: ☐ Yes ☐ No 3. ☐ Yes ☐ No If “Yes,” date initiated: ☐ Yes ☐ No If “Yes,” date criteria met: ☐ Yes ☐ No 4. ☐ Yes ☐ No If “Yes,” date initiated: ☐ Yes ☐ No If “Yes,” date criteria met: ☐ Yes ☐ No 5. ☐ Yes ☐ No If “Yes,” date initiated: ☐ Yes ☐ No If “Yes,” date criteria met: ☐ Yes ☐ No 2022 Construction General Permit Site Inspection Report Project Name: _______________________________________ NPDES ID Number: ________________________________ Page 6 of 7 4 If a dewatering discharge was occurring, you must conduct a dewatering inspection pursuant to CGP Part 4.3.2 and complete a separate dewatering inspection report. Section E – Description of Discharges (CGP Part 4.6.2) (Insert additional rows if needed) Was a discharge (not including dewatering) occurring from any part of your site at the time of the inspection?4 ☐ Yes ☐ No If “Yes,” for each point of discharge, document the following: • The visual quality of the discharge. • The characteristics of the discharge, including color; odor; floating, settled, or suspended solids; foam; oil sheen; and other indicators of stormwater pollutants. • Signs of the above pollutant characteristics that are visible from your site and attributable to your discharge in receiving waters or in other constructed or natural site drainage features. Discharge Location Observations 1. 2. 3. 4. 5. 2022 Construction General Permit Site Inspection Report Project Name: _______________________________________ NPDES ID Number: ________________________________ Page 7 of 7 Section F – Signature and Certification (CGP Part 4.7.2) “I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information contained therein. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information contained is, to the best of my knowledge and belief, true, accurate, and complete. I have no personal knowledge that the information submitted is other than true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.” MANDATORY: Signature of Operator or “Duly Authorized Representative:” Signature: Date: Printed Name: Affiliation: OPTIONAL: Signature of Contractor or Subcontractor Signature: Date: Printed Name: Affiliation: General Tips for Using This Template This Site Inspection Report Template is provided to assist you in preparing site inspection reports for EPA’s 2022 Construction General Permit (CGP). If you are covered under the 2022 CGP, you can use this template to create a site inspection report form that is customized to the specific circumstances of your site and that complies with the minimum reporting requirements of Part 4.7 of the permit. Note that the use of this form is optional; you may use your own site inspection report form provided it includes the minimum information required in Part 4.7 of the CGP. This template does not address the CGP’s inspection reporting requirements related to dewatering activities. A separate inspection template has been developed specifically for dewatering activities and is available at https://www.epa.gov/npdes/construction-general-permit-resources-tools-and-templates. Keep in mind that this document is a template and not an “off-the-shelf” inspection report that is ready to use without some modification. You must first customize this form to include the specifics of your project in order for it to be useable for your inspection reports. Once you have entered all of your site-specific information into the blank fields, you may use this form to complete inspection reports. The following tips for using this template will help you ensure that the minimum permit requirements are met: • Review the inspection requirements. Before you start developing your inspection report form, read the CGP’s Part 4 inspection requirements. This will ensure that you have a working understanding of the permit’s underlying inspection requirements. • Complete all required blank fields. Fill out all blank fields. Only by filling out all fields will the template be compliant with the requirements of the permit. (Note: Where you do not need the number of rows provided in the template form for your inspection, you may delete these or cross them off as you see fit. Or, if you need more space to document your findings, you may insert additional rows in the electronic version of this form or use the bottom of the page in the field version of this form.) • Use your site map to document inspection findings. In several places in the template, you are directed to specify the location of certain features of your site, including where stormwater controls are installed and where you will be stabilizing exposed soil. You are also asked to fill in location information for unsafe conditions and the locations of any discharges occurring during your inspections. Where you are asked for location information, EPA encourages you to reference the point on your SWPPP site map that corresponds to the requested location on the inspection form. Using the site map as a tool in this way will help you conduct efficient inspections, will assist you in evaluating problems found, and will ensure proper documentation. • Complete the inspection report within 24 hours of completing a site inspection. You must complete an inspection report in accordance with Part 4.7.1 of the CGP. • Include the inspection form with your SWPPP. Once your form is complete, make sure to include a copy of the inspection form in your SWPPP in accordance with Part 7.2.7.e of the CGP. • Retain copies of all inspection reports with your records. You must also retain in your records copies of all inspection reports in accordance with the requirements in Part 4.7.3 of the CGP. These reports must be retained for at least 3 years from the date your permit coverage expires or is terminated in accordance with the requirements in Part 4.7.4 of the CGP. Instructions for Section A Inspector Name Enter the name of the person that conducted the inspection. Include the person’s contact information (title, affiliated company name, address, email, and phone number). Inspection Date and Time Enter the date you performed the inspection and the time you started and ended the inspection. Weather Conditions During Inspection Enter the weather conditions occurring during the inspection, e.g., sunny, overcast, light rain, heavy rain, snowing, icy, windy. Current Phase of Construction If this project is being completed in more than one phase, indicate which phase it is currently in. Inspection Location If your project has multiple locations where you conduct separate inspections, specify the location where this inspection is being conducted. If only one inspection is conducted for your entire project, enter “Entire Site.” If necessary, complete additional inspection report forms for each separate inspection location. Unsafe Conditions for Inspection (CGP Part 4.5.7) Inspections are not required where a portion of the site or the entire site is subject to unsafe conditions. These conditions should not regularly occur and should not be consistently present on a site. Generally, unsafe conditions are those that render the site (or a portion of it) inaccessible or that would pose a significant probability of injury to applicable personnel. Examples could include severe storm or flood conditions, high winds, and downed electrical wires. If your site, or a portion of it, is affected by unsafe conditions during the time of your inspection, provide a description of the conditions that prevented you from conducting the inspection and what parts of the site were affected. If the entire site was considered unsafe, specify the location as “Entire Site.” Inspection Frequency Check all the inspection frequencies that apply to your project. Note that you may be subject to different inspection frequencies in different areas of your site. Inspection Triggered by a Storm Event If you were required to conduct this inspection because of a storm event that produced 0.25 inches or more of rain within a 24-hour period, indicate whether you relied on an on-site rain gauge or a nearby weather station (and where the weather station is located). Also, specify the total amount of rainfall for this specific storm event. If you were required to conduct this inspection because of a snowmelt discharge from a storm event that produced 3.25 inches or more of snow within a 24- hour period, then indicate whether you relied on an on-site measurement or a nearby weather station (and where the weather station is located). Also, specify the total amount of snowfall for this specific storm event. Instructions for Section B Type and Location of Erosion and Sediment (E&S) Controls Provide a list of all erosion and sediment (E&S) controls that your SWPPP indicates will be installed and implemented at your site. This list must include at a minimum all E&S controls required by CGP Part 2.2. Include also any natural buffers established under CGP Part 2.2.1. Buffer requirements apply if your project’s earth-disturbing activities will occur within 50 feet of a discharge to receiving water. You may group your E&S controls on your form if you have several of the same type of controls (e.g., you may group “Inlet Protection Measures,” “Perimeter Controls,” and “Stockpile Controls” together on one line), but if there are any problems with a specific control, you must separately identify the location of the control, whether routine maintenance or corrective action is necessary, and in the notes section you must describe the specifics about the problem you observed. Conditions Requiring Routine Maintenance? Answer “Yes” if the E&S control requires routine maintenance as defined in footnote 1 of this template. Note that in many cases, “Yes” answers are expected and indicate a project with an active operation and maintenance program. You should also answer “Yes” if work to fix the problem is still ongoing from the previous inspection, though necessary work must be initiated immediately and completed by the end of the next business day or within seven calendar days if documented in accordance with CGP Part 2.1.4.b. If “Yes,” How Many Times (Including this Occurrence) Has this Condition Been Identified? Indicate how many times the routine maintenance has been required for the same control at the same location. Conditions Requiring Corrective Action? Answer “Yes” if you found any of the conditions listed in footnote 2 in this template to be present during your inspection (CGP Part 5.1). If you answer “Yes,” you must take corrective action and complete a corrective action log, found at https://www.epa.gov/npdes/construction-general-permit-resources-tools- and-templates. You should also answer “Yes” if work to fix the problem from a previous inspection is still ongoing, though the operator must comply with the corrective action deadlines in CGP Part 5.2. Date on Which Condition First Observed (If Applicable)? Provide the date on which the condition that triggered the need for routine maintenance or corrective action was first identified. If the condition was just discovered during this inspection, enter the inspection date. If the condition is a carryover from a previous inspection, enter the original date of the condition’s discovery. Description of Conditions Observed For each E&S control and the area immediately surrounding it, describe whether the control is properly installed and whether it appears to be working to minimize sediment discharge. Indicate also whether a new or modified control is necessary to comply with the permit. Describe any problem condition(s) you observed such as the following: 1. Failure to install or to properly install a required E&S control 2. Damage or destruction to an E&S control caused by vehicles, equipment, or personnel, a storm event, or other event 3. Mud or sediment deposits found downslope from E&S controls, including in receiving waters, or on nearby streets, curbs, or open conveyance channels 4. Sediment tracked out onto paved areas by vehicles leaving construction site 5. Noticeable erosion or sedimentation at discharge outlets or at adjacent streambanks or channels 6. Erosion of the site’s sloped areas (e.g., formation of rills or gullies) 7. E&S control is no longer working due to lack of maintenance 8. Other incidents of noncompliance Describe also why you think the problem condition(s) occurred as well as actions (e.g., routine maintenance or corrective action) you will take or have taken to fix the problem. For buffer areas, make note of whether they are marked off as required, whether there are signs of construction disturbance within the buffer, which is prohibited under the CGP, and whether there are visible signs of erosion resulting from discharges through the area. If routine maintenance or corrective action is required, briefly note the reason. If routine maintenance or corrective action has been completed, make a note of the date it was completed and what was done. If corrective action is required, note that you will need to complete a separate corrective action log describing the condition and your work to fix the problem. Routine Maintenance Need Has Been Found to be Necessary Three (3) or More Times for the Same Control at the Same Location (Including this Occurrence) If routine maintenance has been required three (3) or more times for the same control at the same location, the permit requires (CGP Part 2.1.4.c) you to fix the problem using the corrective action procedures in CGP Part 5 or to document why you believe the reoccurring problem can be addressed as a routine maintenance fix. If you believe the problem can continue to be fixed as routine maintenance, describe why you believe the specific condition should still be addressed as routine maintenance. Instructions for Section C Type and Location of Pollution Prevention (P2) Practices and Controls Provide a list of all pollution prevention (P2) practices and controls that are implemented at your site. This list must include all P2 practices and controls required by CGP Part 2.3 and those that are described in your SWPPP. Conditions Requiring Routine Maintenance? Answer “Yes” if the P2 practice or control requires routine maintenance as defined in footnote 1of this template. Note that in many cases, “Yes” answers are expected and indicate a project with an active operation and maintenance program. You should also answer “Yes” if work to fix the problem is still ongoing from the previous inspection, though necessary work must be initiated immediately and completed by the end of the next business day or within seven calendar days if documented in accordance with CGP Part 2.1.4.b. If “Yes,” How Many Times (Including this Occurrence) Has this Condition Been Identified? Indicate how many times the routine maintenance has been required for the same practice or control at the same location. Conditions Requiring Corrective Action? Answer “Yes” if you found any of the conditions listed in footnote 2 in this template to be present during your inspection (CGP Part 5.1). If you answer “Yes,” you must take corrective action and complete a corrective action log, found at https://www.epa.gov/npdes/construction-general-permit-resources-tools- and-templates. You should also answer “Yes” if work to fix the problem from a previous inspection is still ongoing, though the operator must comply with the corrective action deadlines in CGP Part 5.2. Date on Which Condition First Observed (If Applicable)? Provide the date on which the condition that triggered the need for maintenance or corrective action was first identified. If the condition was just discovered during this inspection, enter the inspection date. If the condition is a carryover from a previous inspection, enter the original date of the condition’s discovery. Description of Conditions Observed For each P2 control and the area immediately surrounding it, describe whether the control is properly installed, and whether it appears to be working to minimize or eliminate pollutant discharges. Indicate also whether a new or modified control is necessary to comply with the permit. Describe any problem condition(s) you observed such as the following: 1. Failure to install or to properly install a required P2 control 2. Damage or destruction to a P2 control caused by vehicles, equipment, or personnel, or a storm event 3. Evidence of a spill, leak, or other type of pollutant discharge, or failure to have properly cleaned up a previous spill, leak, or other type of pollutant discharge 4. Spill response supplies are absent, insufficient, or not where they are supposed to be located 5. Improper storage, handling, or disposal of chemicals, building materials or products, fuels, or wastes 6. P2 control is no longer working due to lack of maintenance 7. Other incidents of noncompliance Describe also why you think the problem condition(s) occurred as well as actions (e.g., routine maintenance or corrective action) you will take or have taken to fix the problem. If routine maintenance or corrective action is required, briefly note the reason. If routine maintenance or corrective action has been completed, make a note of the date it was completed and what was done. If corrective action is required, note that you will need to complete a separate corrective action log describing the condition and your work to fix the problem. Routine Maintenance Need Was Found to be Necessary Three (3) or More Times for the Same Control at the Same Location (Including this Occurrence) If routine maintenance has been required three (3) or more times for the same control at the same location, the permit requires (CGP Part 2.1.4.c) you to fix the problem using the corrective action procedures in CGP Part 5 or to document why you believe the reoccurring problem can be addressed as a routine maintenance fix. If you believe the problem can continue to be fixed as routine maintenance, describe why you believe the specific condition should still be addressed as routine maintenance. Instructions for Section D Specific Location That Has Been or Will Be Stabilized List all areas where soil stabilization is required to begin because construction work in that area has permanently stopped or temporarily stopped (i.e., work will stop for 14 or more days), and all areas where stabilization has been implemented (CGP Part 2.2.14). Stabilization Method and Applicable Deadline For each area, specify the method of stabilization (e.g., hydroseed, sod, planted vegetation, erosion control blanket, mulch, rock). Specify also which of the following stabilization deadlines apply to this location: 1. 5 acres or less of land disturbance occurring at any one time at site: Complete no later than 14 calendar days after stabilization initiated. 2. More than 5 acres of land disturbance occurring at any one time at site: Complete no later than 7 calendar days after stabilization initiated. 3. Arid, semi-arid, and drought-stricken areas: See CGP Part 2.2.14.b.i. 4. Unforeseen circumstances: See CGP Part 2.2.14.b.ii. 5. Discharges to a sediment- or nutrient-impaired water or to a water identified as Tier 2, 2.5, or 3 for antidegradation purposes: Complete no later than 7 days after stabilization initiated. Stabilization Initiated? For each area, indicate whether stabilization has been initiated. If “Yes,” then enter the date stabilization was initiated. Final Stabilization Criteria Met? For each area, indicate whether the final stabilization criteria in CGP Part 2.2.14.c have been met. If “Yes,” then enter the date final stabilization criteria were met. Final Stabilization Photos Taken? Answer “Yes” if you have taken photos before and after meeting the stabilization criteria as required in CGP Part 8.2.1.a. Notes For each area where stabilization has been initiated, describe the progress that has been made and what additional actions are necessary to complete stabilization. Note the effectiveness of stabilization in preventing erosion. If stabilization has been initiated but not completed, make a note of the date it is to be completed. If stabilization has been completed, make a note of the date it was completed. If stabilization has not yet been initiated, make a note of the date it is to be initiated and the date it is to be completed. Instructions for Section E You are only required to complete this section if a discharge is occurring at the time of the inspection (CGP Part 4.6.2). Was a discharge (not including dewatering) occurring from any part of your site at the time of the inspection? During your inspection, examine all points of discharge from your site, and determine whether a discharge is occurring. If a dewatering discharge was occurring, you must conduct a dewatering inspection pursuant to CGP Part 4.3.2. If there is a discharge, answer “Yes” and complete the questions below regarding the specific discharge. If there is not a discharge, answer “No” and skip to the next page. Discharge Location (Repeat as necessary if there are multiple points of discharge.) Specify the location on your site where the discharge is occurring. The location may be an outlet from a stormwater control or constructed stormwater channel, a discharge into a storm sewer inlet, or a specific point on the site. Be as specific as possible; it is recommended that you refer to a precise point on your site map. Observations Document the visual quality of the discharge and take note of the characteristics of the stormwater discharge, including color; odor; floating, settled, or suspended solids; foam; oily sheen; and other indicators of stormwater pollutants. Also, document signs of these same pollutant characteristics that are visible from your site and attributable to your discharge in receiving waters or in other constructed or natural site drainage features. Instructions for Section F Each inspection report must be signed and certified to be considered complete (CGP Part 4.7.2). Operator or “Duly Authorized Representative” – MANDATORY (CGP Appendix G Part G.11.2 and CGP Appendix H Section X) At a minimum, the site inspection report must be signed by either (1) the person who signed the NOI, or (2) a duly authorized representative of that person. The following requirements apply: If the signatory will be the person who signed the NOI for permit coverage, as a reminder, that person must be one of the following types of individuals: • For a corporation: By a responsible corporate officer. For the purpose of this subsection, a responsible corporate officer means: (i) a president, secretary, treasurer, or vice-president of the corporation in charge of a principal business function, or any other person who performs similar policy- or decision- making functions for the corporation, or (ii) the manager of one or more manufacturing, production, or operating facilities, provided, the manager is authorized to make management decisions which govern the operation of the regulated facility including having the explicit or implicit duty of making major capital investment recommendations, and initiating and directing other comprehensive measures to assure long term environmental compliance with environmental laws and regulations; the manager can ensure that the necessary systems are established or actions taken to gather complete and accurate information for permit application requirements; and where authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures. • For a partnership or sole proprietorship: By a general partner or the proprietor, respectively. • For a municipality, State, Federal, or other public agency: By either a principal executive officer or ranking elected official. For purposes of this subsection, a principal executive officer of a Federal agency includes (i) the chief executive officer of the agency, or (ii) a senior executive officer having responsibility for the overall operations of a principal geographic unit of the agency (e.g., Regional Administrator of EPA). If the signatory will be a duly authorized representative, the following requirements must be met: • The authorization is made in writing by the person who signed the NOI (see above); • The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility or activity such as the position of plant manager, operator of a well or a well field, superintendent, position of equivalent responsibility, or an individual or position having overall responsibility for environmental matters for the company. (A duly authorized representative may thus be either a named individual or any individual occupying a named position); and • The signed and dated written authorization is included in the SWPPP. A copy must be submitted to EPA, if requested. Sign, date and print your name and affiliation. Contractor or Subcontractor - OPTIONAL Where you rely on a contractor or subcontractor to complete the site inspection report, you should consider requiring the individual(s) to sign and certify each report. Note that this does not relieve you, the permitted operator, of the requirement to sign and certify the site inspection report as well. If applicable, sign, date, and print your name and affiliation. Note While EPA has made every effort to ensure the accuracy of all instructions contained in this template, it is the permit, not this template, that determines the actual obligations of regulated construction stormwater discharges. In the event of a conflict between this template and any corresponding provision of the CGP, you must abide by the requirements in the permit. EPA welcomes comments on this Site Inspection Report Template at any time and will consider those comments in any future revision. You may contact EPA for CGP-related inquiries at cgp@epa.gov Appendix E – Copy of Corrective Action Form 2022 CGP Corrective Action Log Project Name: ______________________________________________ NPDES ID Number: __________________________________________ Section A – Individual Completing this Log Name: Title: Company Name: Email: Address: Phone Number: Section B – Details of the Problem (CGP Part 5.4.1.a) Complete this section within 24 hours of discovering the condition that triggered corrective action. Date problem was first identified: Time problem was first identified: What site conditions triggered this corrective action? (Check the box that applies. See instructions for a description of each triggering condition (1 thru 6).) ☐ 1 ☐ 2 ☐ 3 ☐ 4 ☐ 5a ☐ 5b ☐ 6 Specific location where problem identified: Provide a description of the specific condition that triggered the need for corrective action and the cause (if identifiable): Section C – Corrective Action Completion (CGP Part 5.4.1.b) Complete this section within 24 hours after completing the corrective action. For site condition # 1, 2, 3, 4, or 6 (those not related to a dewatering discharge) confirm that you met the following deadlines (CGP Part 5.2.1): ☐ Immediately took all reasonable steps to address the condition, including cleaning up any contaminated surfaces so the material will not discharge in subsequent storm events. AND ☐ Completed corrective action by the close of the next business day, unless a new or replacement control, or significant repair, was required. OR ☐ Completed corrective action within seven (7) calendar days from the time of discovery because a new or replacement control, or significant repair, was necessary to complete the installation of the new or modified control or complete the repair. OR ☐ It was infeasible to complete the installation or repair within 7 calendar days from the time of discovery. Provide the following additional information: Explain why 7 calendar days was infeasible to complete the installation or repair: Provide your schedule for installing the stormwater control and making it operational as soon as feasible after the 7 calendar days: For site condition # 5a, 5b, or 6 (those related to a dewatering discharge), confirm that you met the following deadlines: ☐ Immediately took all reasonable steps to minimize or prevent the discharge of pollutants until a solution could be implemented, including shutting off the dewatering discharge as soon as possible depending on the severity of the condition taking safety considerations into account. ☐ Determined whether the dewatering controls were operating effectively and whether they were causing the conditions. ☐ Made any necessary adjustments, repairs, or replacements to the dewatering controls to lower the turbidity levels below the benchmark or remove the visible plume or sheen. Describe any modification(s) made as part of corrective action: (Insert additional rows below if applicable) Date of completion: SWPPP update necessary? If yes, date SWPPP was updated: 1. ☐ Yes ☐ No 2. ☐ Yes ☐ No Section D - Signature and Certification (CGP Part 5.4.2) “I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information contained therein. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information contained is, to the best of my knowledge and belief, true, accurate, and complete. I have no personal knowledge that the information submitted is other than true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.” MANDATORY: Signature of Operator or “Duly Authorized Representative:” Signature: Date: Printed Name: Affiliation: OPTIONAL: Signature of Contractor or Subcontractor Signature: Date: Printed Name: Affiliation: General Instructions This Corrective Action Log Template is provided to assist you creating a corrective action log that complies with the minimum reporting requirements of Part 5.4 of the EPA’s Construction General Permit (CGP). For each triggering condition on your site, you will need to fill out a separate corrective action log. The entire form must be completed to be compliant with the requirements of the permit. (Note: In Section C, if you do not need the number of rows provided in the corrective action log, you may delete these or cross them off. Alternatively, if you need more space to describe any modifications, you may insert additional rows in the electronic version of this form or use the bottom of the page in the field version of this form.) If you are covered under a State CGP, this template may be helpful in developing a log that can be used for that permit; however, you will likely need to modify this form to meet the specific requirements of any State-issued permit. If your permitting authority requires you to use a specific corrective action log, you should not use this template. Instructions for Section A Individual completing this form Enter the name of the person completing this log. Include the person’s contact information (title, affiliated company name, address, email, and phone number). Instructions for Section B You must complete Section B within 24 hours of discovering the condition that triggered corrective action. (CGP Part 5.4) When was the problem first discovered? Specify the date and time when the triggering condition was first discovered. What site conditions triggered this corrective action? (CGP Parts 5.1 and 5.3) Check the box corresponding to the numbered triggering condition below that applies to your site. 1. A stormwater control needs a significant repair or a new or replacement control is needed, or, in accordance with Part 2.1.4c, you find it necessary to repeatedly (i.e., 3 or more times) conduct the same routine maintenance fix to the same control at the same location (unless you document in your inspection report under Part 4.7.1c that the specific reoccurrence of this same problem should still be addressed as a routine maintenance fix under Part 2.1.4); 2. A stormwater control necessary to comply with the requirements of this permit was never installed, or was installed incorrectly; 3. Your discharges are not meeting applicable water quality standards; 4. A prohibited discharge has occurred (see Part 1.3); 5. During discharge from site dewatering activities: a. The weekly average of your turbidity monitoring results exceeds the 50 NTU benchmark (or alternate benchmark if approved by EPA pursuant to Part 3.3.2b); or b. You observe or you are informed by EPA, State, or local authorities of the presence of any of the following at the point of discharge to a receiving water flowing through or immediately adjacent to your site and/or to constructed or natural site drainage features or storm drain inlets: • sediment plume • suspended solids • unusual color • presence of odor • decreased clarity • presence of foam • visible sheen on the water surface or visible oily deposits on the bottom or shoreline of the receiving water 6. EPA requires corrective action as a result of permit violations found during an inspection carried out under Part 4.8. Provide a description of the problem (CGP Part 5.4.1.a) Provide a summary description of the condition you found that triggered corrective action, the cause of the problem (if identifiable), and the specific location where it was found. Be as specific as possible about the location; it is recommended that you refer to a precise point on your site map. Instructions for Section C You must complete Section C within 24 hours after completing the correction action. (CGP Part 5.4) Deadlines for completing corrective action for condition # 1, 2, 3, 4, or 6 (if not relating to a dewatering discharge) (CGP Part 5.2.1) Check the box to confirm that you met the deadlines that apply to each triggering condition. You are always required to check the first box (i.e., Immediately took all reasonable steps to address the condition, including cleaning up any contaminated surfaces so the material will not discharge in subsequent storm events.). Only one of the next three boxes should be checked depending on the situation that applies to this corrective action. Check the second box if the corrective action for this particular triggering condition does not require a new or replacement control, or a significant repair. These actions must be completed by the close of the next business day from the time of discovery of the condition. Check the third box if the corrective action for this particular triggering condition requires a new or replacement control, or a significant repair. These actions must be completed by no later than seven calendar days from the time of discover of the condition. Check the fourth box if the corrective action for this particular triggering condition requires a new or replacement control, or a significant repair, and if it is infeasible to complete the work within seven calendar days. Additionally, you will need to fill out the table below the checkbox that requires: 1. An explanation as to why it was infeasible to complete the installation or repair within seven calendar days of discovering the condition. 2. Provide the schedule you will adhere to for installing the stormwater control and making it operational as soon as feasible after the seventh day following discovery. Note: Per Part 5.2.1.c, where these actions result in changes to any of the stormwater controls or procedures documented in your SWPPP, you must modify your SWPPP accordingly within seven calendar days of completing this work. Deadlines for completing corrective action for condition # 5a, 5b, or 6 related to a dewatering discharge (CGP Part 5.2.2) These deadlines apply to conditions relating to construction dewatering activities. Check the box to confirm that you met the deadlines that apply to each triggering condition. You are required to check all of the boxes in this section to indicate your compliance with the corrective action deadlines. List of modification(s) to correct problem Provide a list of modifications you completed to correct the problem. Date of completion Enter the date you completed the modification. The work must be completed by the deadline you indicated above. SWPPP update necessary? Check “Yes” or “No” to indicate if a SWPPP update is necessary consistent with Part 7.4.1.a in order to reflect changes implemented at your site. If “Yes,” then enter the date you updated your SWPPP. The SWPPP updates must be made within seven calendar days of completing a corrective action. (CGP Part 5.2.1.c) Instructions for Section D Each corrective action log entry must be signed and certified following completion of Section D to be considered complete. (CGP Part 5.4.2) Operator or “Duly Authorized Representative” – MANDATORY (CGP Appendix G Part G.11.2 and CGP Appendix H Section X) At a minimum, the corrective action log must be signed by either (1) the person who signed the NOI, or (2) a duly authorized representative of that person. The following requirements apply: If the signatory will be the person who signed the NOI for permit coverage, as a reminder, that person must be one of the following types of individuals: • For a corporation: By a responsible corporate officer. For the purpose of this subsection, a responsible corporate officer means: (i) a president, secretary, treasurer, or vice-president of the corporation in charge of a principal business function, or any other person who performs similar policy- or decision-making functions for the corporation, or (ii) the manager of one or more manufacturing, production, or operating facilities, provided, the manager is authorized to make management decisions which govern the operation of the regulated facility including having the explicit or implicit duty of making major capital investment recommendations, and initiating and directing other comprehensive measures to assure long term environmental compliance with environmental laws and regulations; the manager can ensure that the necessary systems are established or actions taken to gather complete and accurate information for permit application requirements; and where authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures. • For a partnership or sole proprietorship: By a general partner or the proprietor, respectively. • For a municipality, State, Federal, or other public agency: By either a principal executive officer or ranking elected official. For purposes of this subsection, a principal executive officer of a Federal agency includes (i) the chief executive officer of the agency, or (ii) a senior executive officer having responsibility for the overall operations of a principal geographic unit of the agency (e.g., Regional Administrator of EPA). If the signatory will be a duly authorized representative, the following requirements must be met: • The authorization is made in writing by the person who signed the NOI (see above); • The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility or activity such as the position of plant manager, operator of a well or a well field, superintendent, position of equivalent responsibility, or an individual or position having overall responsibility for environmental matters for the company. (A duly authorized representative may thus be either a named individual or any individual occupying a named position); and • The signed and dated written authorization is included in the SWPPP. A copy must be submitted to EPA, if requested. Sign, date and print your name and affiliation. Contractor or Subcontractor - OPTIONAL Where you rely on a contractor or subcontractor to complete this log and the associated corrective action, you should consider requiring the individual(s) to sign and certify each log entry. Note that this does not relieve you, the permitted operator, of the requirement to sign and certify the log as well. If applicable, sign, date, and print your name and affiliation. Recordkeeping Logs must be retained for at least 3 years from the date your permit coverage expires or is terminated. (CGP Part 5.4.4) Keep copies of your signed corrective action log entries at the site or at an easily accessible location so that it can be made immediately available at the time of an on-site inspection or upon request by EPA. (CGP Part 5.4.3) Include a copy of the corrective action log in your SWPPP. (CGP Part 7.2.7.e) Note While EPA has made every effort to ensure the accuracy of all instructions contained in this template, it is the permit, not this template, that determines the actual obligations of regulated construction stormwater discharges. In the event of a conflict between this template and any corresponding provision of the CGP, you must abide by the requirements in the permit. EPA welcomes comments on this Corrective Action Log Template at any time and will consider those comments in any future revision. You may contact EPA for CGP-related inquiries at cgp@epa.gov Appendix F – SWPPP Amendment Log Appendix F – SWPPP Amendment Log No. Description of the Amendment Date of Amendment Amendment Prepared by [Name(s) and Title] Appendix G –Subcontractor Certifications/Agreements Appendix G –Subcontractor Certifications/Agreements SUBCONTRACTOR CERTIFICATION STORMWATER POLLUTION PREVENTION PLAN Project Number: 13-1515-Wall Restoration Project Title: Headrace Levee Retaining Wall Restoration Operator(s): OHI Engineering, Inc. As a subcontractor, you are required to comply with the Stormwater Pollution Prevention Plan (SWPPP) for any work that you perform on-site. Any person or group who violates any condition of the SWPPP may be subject to substantial penalties or loss of contract. You are encouraged to advise each of your employees working on this project of the requirements of the SWPPP. A copy of the SWPPP is available for your review at the office trailer. Each subcontractor engaged in activities at the construction site that could impact stormwater must be identified and sign the following certification statement: I certify under the penalty of law that I have read and understand the terms and conditions of the SWPPP for the above designated project and agree to follow the practices described in the SWPPP. This certification is hereby signed in reference to the above-named project: Company: OHI Engineering, Inc. Address: 110 Pulpit Hill Road, Amherst, MA Telephone Number: 413-835-0780 Type of construction service to be provided: Soil testing, Licensed Site Professional (LSP) Signature: Title: Regional Manager Date: Appendix G –Subcontractor Certifications/Agreements SUBCONTRACTOR CERTIFICATION STORMWATER POLLUTION PREVENTION PLAN Project Number: 13-1515-Wall Restoration Project Title: Headrace Levee Retaining Wall Restoration Operator(s): Duffy Willard As a subcontractor, you are required to comply with the Stormwater Pollution Prevention Plan (SWPPP) for any work that you perform on-site. Any person or group who violates any condition of the SWPPP may be subject to substantial penalties or loss of contract. You are encouraged to advise each of your employees working on this project of the requirements of the SWPPP. A copy of the SWPPP is available for your review at the office trailer. Each subcontractor engaged in activities at the construction site that could impact stormwater must be identified and sign the following certification statement: I certify under the penalty of law that I have read and understand the terms and conditions of the SWPPP for the above designated project and agree to follow the practices described in the SWPPP. This certification is hereby signed in reference to the above-named project: Company: Duffy Willard Address: 157 Florence Road, Florence, MA Telephone Number: 413-537-3753 Type of construction service to be provided: Initial clearing; build construction entrance. Signature: Title: Owner Date: Appendix G –Subcontractor Certifications/Agreements SUBCONTRACTOR CERTIFICATION STORMWATER POLLUTION PREVENTION PLAN Project Number: 13-1515-Wall Restoration Project Title: Headrace Levee Retaining Wall Restoration Operator(s): C.D. Davenport As a subcontractor, you are required to comply with the Stormwater Pollution Prevention Plan (SWPPP) for any work that you perform on-site. Any person or group who violates any condition of the SWPPP may be subject to substantial penalties or loss of contract. You are encouraged to advise each of your employees working on this project of the requirements of the SWPPP. A copy of the SWPPP is available for your review at the office trailer. Each subcontractor engaged in activities at the construction site that could impact stormwater must be identified and sign the following certification statement: I certify under the penalty of law that I have read and understand the terms and conditions of the SWPPP for the above designated project and agree to follow the practices described in the SWPPP. This certification is hereby signed in reference to the above-named project: Company: C.D. Davenport Address: 130 Colrain Street, Greenfield, MA 01301 Telephone Number: 413-774-2080 Type of construction service to be provided: Tree clearing & removal, log-mats, retaining wall restoration, re-grading, stockpile construction, final grading. Signature: Title: Team Lead Date: Appendix H –Grading and Stabilization Activities Log Appendix H –Grading and Stabilization Activities Log Date Grading Activity Initiated Description of Grading Activity Description of Stabilization Measure and Location Date Grading Activity Ceased (Indicate Temporary or Permanent) Date When Stabilization Measures Initiated Appendix I – SWPPP Training Log Appendix I – SWPPP Training Log Stormwater Pollution Prevention Training Log Project Name: Headrace Levee Retaining Wall Restoration Project Location: Northampton, MA Instructor’s Name(s): Instructor’s Title(s): Course Location: Date: Course Length (hours): Stormwater Training Topic: (check as appropriate)  Sediment and Erosion Controls  Emergency Procedures  Stabilization Controls  Inspections/Corrective Actions  Pollution Prevention Measures Specific Training Objective: Attendee Roster: (attach additional pages as necessary) No. Name of Attendee Company 1 2 3 4 5 6 7 8 Appendix J – Delegation of Authority Form Appendix J – Delegation of Authority Form Delegation of Authority I, _______________________ (name), hereby designate the person or specifically described position below to be a duly authorized representative for the purpose of overseeing compliance with environmental requirements, including the Construction General Permit, at the ____________________________________ construction site. The designee is authorized to sign any reports, stormwater pollution prevention plans and all other documents required by the permit. ________________________________________ (name of person or position) ________________________________________ (company) ________________________________________ (address) ________________________________________ (city, state, zip) ________________________________________ (phone) By signing this authorization, I confirm that I meet the requirements to make such a designation as set forth in Appendix I of EPA’s Construction General Permit (CGP), and that the designee above meets the definition of a “duly authorized representative” as set forth in Appendix I. I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Name: Company: Title: Signature: Date: Appendix K – Endangered Species Documentation March 11, 2022 United States Department of the Interior FISH AND WILDLIFE SERVICE New England Ecological Services Field Office 70 Commercial Street, Suite 300 Concord, NH 03301-5094 Phone: (603) 223-2541 Fax: (603) 223-0104 http://www.fws.gov/newengland In Reply Refer To: Project Code: 2022-0018634 Project Name: Cutlery Subject:List of threatened and endangered species that may occur in your proposed project location or may be affected by your proposed project To Whom It May Concern: Please review this letter each time you request an Official Species List, we will continue to update it with additional information and links to websites may change. About Official Species Lists The purpose of the Act is to provide a means whereby threatened and endangered species and the ecosystems upon which they depend may be conserved. Federal and non-Federal project proponents have responsibilities under the Act to consider effects on listed species. The enclosed species list identifies threatened, endangered, proposed, and candidate species, as well as proposed and final designated critical habitat, that may occur within the boundary of your proposed project and/or may be affected by your proposed project. The species list fulfills the requirements of the U.S. Fish and Wildlife Service (Service) under section 7(c) of the Endangered Species Act (Act) of 1973, as amended (16 U.S.C. 1531 et seq.). New information based on updated surveys, changes in the abundance and distribution of species, changed habitat conditions, or other factors could change this list. Please note that under 50 CFR 402.12(e) of the regulations implementing section 7 of the Act, the accuracy of this species list should be verified after 90 days. The Service recommends that verification be completed by visiting the ECOS-IPaC website at regular intervals during project planning and implementation for updates to species lists and information. An updated list may be requested by returning to an existing project’s page in IPaC. Endangered Species Act Project Review Please visit the “New England Field Office Endangered Species Project Review and Consultation” website for step-by-step instructions on how to consider effects on listed 03/11/2022 2 species and prepare and submit a project review package if necessary: https://www.fws.gov/newengland/endangeredspecies/project-review/index.html *NOTE* Please do not use the Consultation Package Builder tool in IPaC except in specific situations following coordination with our office. Please follow the project review guidance on our website instead and reference your Project Code in all correspondence. Additional Info About Section 7 of the Act Under section 7(a)(2) of the Act and its implementing regulations (50 CFR 402 et seq.), Federal agencies are required to determine whether projects may affect threatened and endangered species and/or designated critical habitat. If a Federal agency, or its non-Federal representative, determines that listed species and/or designated critical habitat may be affected by the proposed project, the agency is required to consult with the Service pursuant to 50 CFR 402. In addition, the Federal agency also may need to consider proposed species and proposed critical habitat in the consultation. 50 CFR 402.14(c)(1) specifies the information required for consultation under the Act regardless of the format of the evaluation. More information on the regulations and procedures for section 7 consultation, including the role of permit or license applicants, can be found in the "Endangered Species Consultation Handbook" at: http://www.fws.gov/endangered/esa-library/pdf/TOC-GLOS.PDF In addition to consultation requirements under Section 7(a)(2) of the ESA, please note that under sections 7(a)(1) of the Act and its implementing regulations (50 CFR 402 et seq.), Federal agencies are required to utilize their authorities to carry out programs for the conservation of threatened and endangered species. Please contact NEFO if you would like more information. Candidate species that appear on the enclosed species list have no current protections under the ESA. The species’ occurrence on an official species list does not convey a requirement to consider impacts to this species as you would a proposed, threatened, or endangered species. The ESA does not provide for interagency consultations on candidate species under section 7, however, the Service recommends that all project proponents incorporate measures into projects to benefit candidate species and their habitats wherever possible. Migratory Birds In addition to responsibilities to protect threatened and endangered species under the Endangered Species Act (ESA), there are additional responsibilities under the Migratory Bird Treaty Act (MBTA) and the Bald and Golden Eagle Protection Act (BGEPA) to protect native birds from project-related impacts. Any activity, intentional or unintentional, resulting in take of migratory birds, including eagles, is prohibited unless otherwise permitted by the U.S. Fish and Wildlife Service (50 C.F.R. Sec. 10.12 and 16 U.S.C. Sec. 668(a)). For more information regarding these Acts see: 03/11/2022 3 ▪ https://www.fws.gov/birds/policies-and-regulations.php Please feel free to contact us at newengland@fws.gov with your Project Code in the subject line if you need more information or assistance regarding the potential impacts to federally proposed, listed, and candidate species and federally designated and proposed critical habitat. Attachment(s): Official Species List Attachment(s): Official Species List 03/11/2022 1 Official Species List This list is provided pursuant to Section 7 of the Endangered Species Act, and fulfills the requirement for Federal agencies to "request of the Secretary of the Interior information whether any species which is listed or proposed to be listed may be present in the area of a proposed action". This species list is provided by: New England Ecological Services Field Office 70 Commercial Street, Suite 300 Concord, NH 03301-5094 (603) 223-2541 03/11/2022 2 Project Summary Project Code:2022-0018634 Event Code:None Project Name:Cutlery Project Type:General NRDAR/Spill Response/Environmental Contaminants Project Description:Retaining Wall Restoration, 2022 season Project Location: Approximate location of the project can be viewed in Google Maps: https:// www.google.com/maps/@42.321374399999996,-72.66652687834696,14z Counties:Hampshire County, Massachusetts 03/11/2022 3 1. Endangered Species Act Species There is a total of 2 threatened, endangered, or candidate species on this species list. Species on this list should be considered in an effects analysis for your project and could include species that exist in another geographic area. For example, certain fish may appear on the species list because a project could affect downstream species. IPaC does not display listed species or critical habitats under the sole jurisdiction of NOAA Fisheries , as USFWS does not have the authority to speak on behalf of NOAA and the Department of Commerce. See the "Critical habitats" section below for those critical habitats that lie wholly or partially within your project area under this office's jurisdiction. Please contact the designated FWS office if you have questions. NOAA Fisheries, also known as the National Marine Fisheries Service (NMFS), is an office of the National Oceanic and Atmospheric Administration within the Department of Commerce. Mammals NAME STATUS Northern Long-eared Bat Myotis septentrionalis No critical habitat has been designated for this species. Species profile: https://ecos.fws.gov/ecp/species/9045 Threatened Insects NAME STATUS Monarch Butterfly Danaus plexippus No critical habitat has been designated for this species. Species profile: https://ecos.fws.gov/ecp/species/9743 Candidate Critical habitats THERE ARE NO CRITICAL HABITATS WITHIN YOUR PROJECT AREA UNDER THIS OFFICE'S JURISDICTION. 1 03/11/2022 4 IPaC User Contact Information Agency:OHI Engineering Name:Lyons Witten Address:OHI Engineering, Inc. Address Line 2:110 Pulpit Hill Rd City:Amherst State:MA Zip:01002 Email lwitten@ohiengineering.com Phone:4138350780 Appendix L – Historic Properties Documentation # Demolished? MHC # Historic Name Common Name Address Designations Architectural Style1 NTH.421 Northampton Cutlery Company Factory320 Riverside Dr Northampton Victorian Eclectic; 2 NTH.422 Bay State Engine House 340 Riverside Dr Northampton Reference NumberProperty Name StatusRequest TypeRestricted AddressCategory of PropertyState County City Street & Number01000627 Parsons, Shepherd and Damon, Houses Historic DistrictListed Single FALSE DISTRICT MASSACHUSETTS Hampshire Northampton46,58 and 66 Bridge St.05000931 Dorsey‐Jones House Listed Multiple FALSE BUILDING MASSACHUSETTS Hampshire Northampton191 Nonotuck St.07001360 Ross Farm Listed Multiple FALSE BUILDING MASSACHUSETTS Hampshire Northampton123 Meadow St.12000994 Northampton Veterans Administration Hospital Historic DistrictListed Multiple FALSE DISTRICT MASSACHUSETTS Hampshire Northampton421 N. Main St.76000259 Smith Alumnae Gymnasium Listed Single FALSE BUILDING MASSACHUSETTS Hampshire NorthamptonSmith College campus Green St.76000262 Coolidge, Calvin, House Listed Single FALSE BUILDING MASSACHUSETTS Hampshire Northampton19‐21 Massasoit St.76000263 Manse, The Listed Single FALSE BUILDING MASSACHUSETTS Hampshire Northampton54 Prospect St.76000270 Northampton Downtown Historic District Listed Single FALSE DISTRICT MASSACHUSETTS Hampshire NorthamptonRoughly bounded by Hampton, Pearl, Strong, Bedford, Elm, MA 66, and railroad tracks82001910 Grove Hill Mansion Listed Single FALSE BUILDING MASSACHUSETTS Hampshire NorthamptonFlorence Rd. and Front St.85001464 Northampton Downtown Historic District (Boundary Increase) Listed Single FALSE DISTRICT MASSACHUSETTS Hampshire NorthamptonEast of RR Tracks including 2‐‐10 Bridge and 1‐‐30 Market Sts.85002784 Building at 8‐22 Graves Avenue Listed Single FALSE BUILDING MASSACHUSETTS Hampshire Northampton8‐‐22 Graves Ave.88000910 Fort Hill Historic District Listed Single FALSE DISTRICT MASSACHUSETTS Hampshire NorthamptonRoughly South St. from Lyman to Monroe94000696 Northampton State Hospital Listed Multiple FALSE DISTRICT MASSACHUSETTS Hampshire Northampton1 Prince St.99001123 Miss Florence Diner Listed Multiple FALSE BUILDING MASSACHUSETTS Hampshire Northampton99 Main St.100002420 Pomeroy Terrace Historic District Listed Add.Doc. FALSE district MASSACHUSETTS Hampshire NorthamptonPomeroy Terr., Phillips & Butler Pls., Bixby Ct., Hawley, Hancock, & Bridge Sts.National Register of Historic PlacesNorthampton, MA 01060national‐register‐listed‐20220106 Appendix M – Impaired Waters Documentation Appendix N – Order of Conditions Appendix O – Stormwater Management Report Mansfield, MA Amherst, MA February 8, 2022 RE: Stormwater Management Plan Cutlery River Bank Remediation OHI Project #13-1515 As part of the Mill River Riverbank Remediation plan, it is proposed that an 11-stall parking facility be installed north of and adjacent to the existing parking lot associated with the former Cutlery Firehouse building. The Site is classified as a redevelopment of a former historic mill complex and the area where the parking facility is proposed is currently a stockpile area for impacted soils which is over a section of the former raceway of the mill complex. The proposed work area encompasses an area of 42,266 sf therefore, a Stormwater Management Permit Waiver Application will be filed with the City of Northampton Department of Public Works. Stormwater runoff from the Site currently flows offsite to the south onto the adjacent former Firehouse property or north and west eventually entering the Mill River. Flows to the south will continue to sheet flow southward across the former Firehouse property onto the property of the former mill complex and into the former tailrace where a sediment trap was installed in 2005 to protect the Mill River. After the installation of the parking facility the existing surface flow patterns will be maintained. The sediment trap will be modified by installing a single row of eight-inch (8”) cmu block to the sediment trap spillway to achieve in excess of the required volume for the increase in impervious area. The sediment trap will be maintained annually under the O&M for the former mill complex. Drainage analysis was performed using the Soil Conservation Service (SCS) TR-55 and TR- 20 methodologies as facilitated by the computer program HydroCAD 10.1 by HydroCAD Software Solutions, LLC. The stormwater model was analysed for performance during 2-, 10- and 100-year frequency rainfall events. The events were based on the 24 -hour, Type-III duration storm. The resulting change in peak runoff rates were 0.30 cfs, 0.40 cfs and 0.50 cfs for the 2-, 10- and 100-year storms, respectively and the resulting change in peak runoff volumes were 942 cf, 1,385 cf and 1,928 cf for the 2-, 10- and 100-year storms, respectively. Although there will be an increase in runoff volume due to the additional impervious area no increase to off-site flooding is anticipated as the remediation of the Mill River embankment will provide an additional 2,051 cf of flood storage volume. 44 Wood Avenue Mansfield, MA 02048 Tel (508) 339-3929 Fax (508) 339-3140 www.ohiengineering.com swcheck • 04/01/08 Stormwater Report Checklist • Page 1 of 8 Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands Program Checklist for Stormwater Report A. Introduction Important: When filling out forms on the computer, use only the tab key to move your cursor - do not use the return key. A Stormwater Report must be submitted with the Notice of Intent permit application to document compliance with the Stormwater Management Standards. The following checklist is NOT a substitute for the Stormwater Report (which should provide more substantive and detailed information) but is offered here as a tool to help the applicant organize their Stormwater Management documentation for their Report and for the reviewer to assess this information in a consistent format. As noted in the Checklist, the Stormwater Report must contain the engineering computations and supporting information set forth in Volume 3 of the Massachusetts Stormwater Handbook. The Stormwater Report must be prepared and certified by a Registered Professional Engineer (RPE) licensed in the Commonwealth. The Stormwater Report must include:  The Stormwater Checklist completed and stamped by a Registered Professional Engineer (see page 2) that certifies that the Stormwater Report contains all required submittals.1 This Checklist is to be used as the cover for the completed Stormwater Report.  Applicant/Project Name  Project Address  Name of Firm and Registered Professional Engineer that prepared the Report  Long-Term Pollution Prevention Plan required by Standards 4-6  Construction Period Pollution Prevention and Erosion and Sedimentation Control Plan required by Standard 82  Operation and Maintenance Plan required by Standard 9 In addition to all plans and supporting information, the Stormwater Report must include a brief narrative describing stormwater management practices, including environmentally sensitive site design and LID techniques, along with a diagram depicting runoff through the proposed BMP treatment train. Plans are required to show existing and proposed conditions, identify all wetland resource areas, NRCS soil types, critical areas, Land Uses with Higher Potential Pollutant Loads (LUHPPL), and any areas on the site where infiltration rate is greater than 2.4 inches per hour. The Plans shall identify the drainage areas for both existing and proposed conditions at a scale that enables verification of supporting calculations. As noted in the Checklist, the Stormwater Management Report shall document compliance with each of the Stormwater Management Standards as provided in the Massachusetts Stormwater Handbook. The soils evaluation and calculations shall be done using the methodologies set forth in Volume 3 of the Massachusetts Stormwater Handbook. To ensure that the Stormwater Report is complete, applicants are required to fill in the Stormwater Report Checklist by checking the box to indicate that the specified information has been included in the Stormwater Report. If any of the information specified in the checklist has not been submitted, the applicant must provide an explanation. The completed Stormwater Report Checklist and Certification must be submitted with the Stormwater Report. 1 The Stormwater Report may also include the Illicit Discharge Compliance Statement required by Standard 10. If not included in the Stormwater Report, the Illicit Discharge Compliance Statement must be submitted prior to the discharge of stormwater runoff to the post-construction best management practices. 2 For some complex projects, it may not be possible to include the Construction Period Erosion and Sedimentation Control Plan in the Stormwater Report. In that event, the issuing authority has the discretion to issue an Order of Conditions that approves the project and includes a condition requiring the proponent to submit the Construction Period Erosion and Sedimentation Control Plan before commencing any land disturbance activity on the site. swcheck • 04/01/08 Stormwater Report Checklist • Page 3 of 8 Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands Program Checklist for Stormwater Report Checklist (continued) LID Measures: Stormwater Standards require LID measures to be considered. Document what environmentally sensitive design and LID Techniques were considered during the planning and design of the project: No disturbance to any Wetland Resource Areas Site Design Practices (e.g. clustered development, reduced frontage setbacks) Reduced Impervious Area (Redevelopment Only) Minimizing disturbance to existing trees and shrubs LID Site Design Credit Requested: Credit 1 Credit 2 Credit 3 Use of “country drainage” versus curb and gutter conveyance and pipe Bioretention Cells (includes Rain Gardens) Constructed Stormwater Wetlands (includes Gravel Wetlands designs) Treebox Filter Water Quality Swale Grass Channel Green Roof Other (describe): Standard 1: No New Untreated Discharges No new untreated discharges Outlets have been designed so there is no erosion or scour to wetlands and waters of the Commonwealth Supporting calculations specified in Volume 3 of the Massachusetts Stormwater Handbook included. swcheck • 04/01/08 Stormwater Report Checklist • Page 4 of 8 Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands Program Checklist for Stormwater Report Checklist (continued) Standard 2: Peak Rate Attenuation Standard 2 waiver requested because the project is located in land subject to coastal storm flowage and stormwater discharge is to a wetland subject to coastal flooding. Evaluation provided to determine whether off-site flooding increases during the 100-year 24-hour storm. Calculations provided to show that post-development peak discharge rates do not exceed pre- development rates for the 2-year and 10-year 24-hour storms. If evaluation shows that off-site flooding increases during the 100-year 24-hour storm, calculations are also provided to show that post-development peak discharge rates do not exceed pre-development rates for the 100-year 24- hour storm. Standard 3: Recharge Soil Analysis provided. Required Recharge Volume calculation provided. Required Recharge volume reduced through use of the LID site Design Credits. Sizing the infiltration, BMPs is based on the following method: Check the method used. Static Simple Dynamic Dynamic Field1 Runoff from all impervious areas at the site discharging to the infiltration BMP. Runoff from all impervious areas at the site is not discharging to the infiltration BMP and calculations are provided showing that the drainage area contributing runoff to the infiltration BMPs is sufficient to generate the required recharge volume. Recharge BMPs have been sized to infiltrate the Required Recharge Volume. Recharge BMPs have been sized to infiltrate the Required Recharge Volume only to the maximum extent practicable for the following reason: Site is comprised solely of C and D soils and/or bedrock at the land surface M.G.L. c. 21E sites pursuant to 310 CMR 40.0000 Solid Waste Landfill pursuant to 310 CMR 19.000 Project is otherwise subject to Stormwater Management Standards only to the maximum extent practicable. Calculations showing that the infiltration BMPs will drain in 72 hours are provided. Property includes a M.G.L. c. 21E site or a solid waste landfill and a mounding analysis is included. 1 80% TSS removal is required prior to discharge to infiltration BMP if Dynamic Field method is used. swcheck • 04/01/08 Stormwater Report Checklist • Page 5 of 8 Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands Program Checklist for Stormwater Report Checklist (continued) Standard 3: Recharge (continued) The infiltration BMP is used to attenuate peak flows during storms greater than or equal to the 10- year 24-hour storm and separation to seasonal high groundwater is less than 4 feet and a mounding analysis is provided. Documentation is provided showing that infiltration BMPs do not adversely impact nearby wetland resource areas. Standard 4: Water Quality The Long-Term Pollution Prevention Plan typically includes the following:  Good housekeeping practices;  Provisions for storing materials and waste products inside or under cover;  Vehicle washing controls;  Requirements for routine inspections and maintenance of stormwater BMPs;  Spill prevention and response plans;  Provisions for maintenance of lawns, gardens, and other landscaped areas;  Requirements for storage and use of fertilizers, herbicides, and pesticides;  Pet waste management provisions;  Provisions for operation and management of septic systems;  Provisions for solid waste management;  Snow disposal and plowing plans relative to Wetland Resource Areas;  Winter Road Salt and/or Sand Use and Storage restrictions;  Street sweeping schedules;  Provisions for prevention of illicit discharges to the stormwater management system;  Documentation that Stormwater BMPs are designed to provide for shutdown and containment in the event of a spill or discharges to or near critical areas or from LUHPPL;  Training for staff or personnel involved with implementing Long-Term Pollution Prevention Plan;  List of Emergency contacts for implementing Long-Term Pollution Prevention Plan. A Long-Term Pollution Prevention Plan is attached to Stormwater Report and is included as an attachment to the Wetlands Notice of Intent. Treatment BMPs subject to the 44% TSS removal pretreatment requirement and the one inch rule for calculating the water quality volume are included, and discharge: is within the Zone II or Interim Wellhead Protection Area is near or to other critical areas is within soils with a rapid infiltration rate (greater than 2.4 inches per hour) involves runoff from land uses with higher potential pollutant loads. The Required Water Quality Volume is reduced through use of the LID site Design Credits. Calculations documenting that the treatment train meets the 80% TSS removal requirement and, if applicable, the 44% TSS removal pretreatment requirement, are provided. swcheck • 04/01/08 Stormwater Report Checklist • Page 6 of 8 Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands Program Checklist for Stormwater Report Checklist (continued) Standard 4: Water Quality (continued) The BMP is sized (and calculations provided) based on: The ½” or 1” Water Quality Volume or The equivalent flow rate associated with the Water Quality Volume and documentation is provided showing that the BMP treats the required water quality volume. The applicant proposes to use proprietary BMPs, and documentation supporting use of proprietary BMP and proposed TSS removal rate is provided. This documentation may be in the form of the propriety BMP checklist found in Volume 2, Chapter 4 of the Massachusetts Stormwater Handbook and submitting copies of the TARP Report, STEP Report, and/or other third party studies verifying performance of the proprietary BMPs. A TMDL exists that indicates a need to reduce pollutants other than TSS and documentation showing that the BMPs selected are consistent with the TMDL is provided. Standard 5: Land Uses With Higher Potential Pollutant Loads (LUHPPLs) The NPDES Multi-Sector General Permit covers the land use and the Stormwater Pollution Prevention Plan (SWPPP) has been included with the Stormwater Report. The NPDES Multi-Sector General Permit covers the land use and the SWPPP will be submitted prior to the discharge of stormwater to the post-construction stormwater BMPs. The NPDES Multi-Sector General Permit does not cover the land use. LUHPPLs are located at the site and industry specific source control and pollution prevention measures have been proposed to reduce or eliminate the exposure of LUHPPLs to rain, snow, snow melt and runoff, and been included in the long term Pollution Prevention Plan. All exposure has been eliminated. All exposure has not been eliminated and all BMPs selected are on MassDEP LUHPPL list. The LUHPPL has the potential to generate runoff with moderate to higher concentrations of oil and grease (e.g. all parking lots with >1000 vehicle trips per day) and the treatment train includes an oil grit separator, a filtering bioretention area, a sand filter or equivalent. Standard 6: Critical Areas The discharge is near or to a critical area and the treatment train includes only BMPs that MassDEP has approved for stormwater discharges to or near that particular class of critical area. Critical areas and BMPs are identified in the Stormwater Report. swcheck • 04/01/08 Stormwater Report Checklist • Page 7 of 8 Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands Program Checklist for Stormwater Report Checklist (continued) Standard 7: Redevelopments and Other Projects Subject to the Standards only to the maximum extent practicable The project is subject to the Stormwater Management Standards only to the maximum Extent Practicable as a: Limited Project Small Residential Projects: 5-9 single family houses or 5-9 units in a multi-family development provided there is no discharge that may potentially affect a critical area. Small Residential Projects: 2-4 single family houses or 2-4 units in a multi-family development with a discharge to a critical area Marina and/or boatyard provided the hull painting, service and maintenance areas are protected from exposure to rain, snow, snow melt and runoff Bike Path and/or Foot Path Redevelopment Project Redevelopment portion of mix of new and redevelopment. Certain standards are not fully met (Standard No. 1, 8, 9, and 10 must always be fully met) and an explanation of why these standards are not met is contained in the Stormwater Report. The project involves redevelopment and a description of all measures that have been taken to improve existing conditions is provided in the Stormwater Report. The redevelopment checklist found in Volume 2 Chapter 3 of the Massachusetts Stormwater Handbook may be used to document that the proposed stormwater management system (a) complies with Standards 2, 3 and the pretreatment and structural BMP requirements of Standards 4-6 to the maximum extent practicable and (b) improves existing conditions. Standard 8: Construction Period Pollution Prevention and Erosion and Sedimentation Control A Construction Period Pollution Prevention and Erosion and Sedimentation Control Plan must include the following information:  Narrative;  Construction Period Operation and Maintenance Plan;  Names of Persons or Entity Responsible for Plan Compliance;  Construction Period Pollution Prevention Measures;  Erosion and Sedimentation Control Plan Drawings;  Detail drawings and specifications for erosion control BMPs, including sizing calculations;  Vegetation Planning;  Site Development Plan;  Construction Sequencing Plan;  Sequencing of Erosion and Sedimentation Controls;  Operation and Maintenance of Erosion and Sedimentation Controls;  Inspection Schedule;  Maintenance Schedule;  Inspection and Maintenance Log Form. A Construction Period Pollution Prevention and Erosion and Sedimentation Control Plan containing the information set forth above has been included in the Stormwater Report. swcheck • 04/01/08 Stormwater Report Checklist • Page 8 of 8 Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands Program Checklist for Stormwater Report Checklist (continued) Standard 8: Construction Period Pollution Prevention and Erosion and Sedimentation Control (continued) The project is highly complex and information is included in the Stormwater Report that explains why it is not possible to submit the Construction Period Pollution Prevention and Erosion and Sedimentation Control Plan with the application. A Construction Period Pollution Prevention and Erosion and Sedimentation Control has not been included in the Stormwater Report but will be submitted before land disturbance begins. The project is not covered by a NPDES Construction General Permit. The project is covered by a NPDES Construction General Permit and a copy of the SWPPP is in the Stormwater Report. The project is covered by a NPDES Construction General Permit but no SWPPP been submitted. The SWPPP will be submitted BEFORE land disturbance begins. Standard 9: Operation and Maintenance Plan The Post Construction Operation and Maintenance Plan is included in the Stormwater Report and includes the following information: Name of the stormwater management system owners; Party responsible for operation and maintenance; Schedule for implementation of routine and non-routine maintenance tasks; Plan showing the location of all stormwater BMPs maintenance access areas; Description and delineation of public safety features; Estimated operation and maintenance budget; and Operation and Maintenance Log Form. The responsible party is not the owner of the parcel where the BMP is located and the Stormwater Report includes the following submissions: A copy of the legal instrument (deed, homeowner’s association, utility trust or other legal entity) that establishes the terms of and legal responsibility for the operation and maintenance of the project site stormwater BMPs; A plan and easement deed that allows site access for the legal entity to operate and maintain BMP functions. Standard 10: Prohibition of Illicit Discharges The Long-Term Pollution Prevention Plan includes measures to prevent illicit discharges; An Illicit Discharge Compliance Statement is attached; NO Illicit Discharge Compliance Statement is attached but will be submitted prior to the discharge of any stormwater to post-construction BMPs. EXISTING AP1 Routing Diagram for Cutlery Prepared by OHI Engineering, Inc., Printed 2/8/2022 HydroCAD® 10.10-4b s/n 11276 © 2020 HydroCAD Software Solutions LLC Subcat Reach Pond Link Cutlery Printed 2/8/2022Prepared by OHI Engineering, Inc. Page 2HydroCAD® 10.10-4b s/n 11276 © 2020 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (sq-ft) CN Description (subcatchment-numbers) 6,702 61 >75% Grass cover, Good, HSG B (EXISTING) 35,296 98 Pavement & Roof (EXISTING) Type III 24-hr 2-Year Rainfall=3.00"Cutlery Printed 2/8/2022Prepared by OHI Engineering, Inc. Page 3HydroCAD® 10.10-4b s/n 11276 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment EXISTING: Runoff = 2.34 cfs @ 12.09 hrs, Volume= 7,564 cf, Depth= 2.16" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 1.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 2-Year Rainfall=3.00" Area (sf) CN Description 6,702 61 >75% Grass cover, Good, HSG B * 35,296 98 Pavement & Roof 41,998 92 Weighted Average 6,702 15.96% Pervious Area 35,296 84.04% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Segment A Summary for Link AP1: Inflow Area = 41,998 sf, 84.04% Impervious, Inflow Depth = 2.16" for 2-Year event Inflow = 2.34 cfs @ 12.09 hrs, Volume= 7,564 cf Primary = 2.34 cfs @ 12.09 hrs, Volume= 7,564 cf, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 1.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 10-Year Rainfall=4.50"Cutlery Printed 2/8/2022Prepared by OHI Engineering, Inc. Page 4HydroCAD® 10.10-4b s/n 11276 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment EXISTING: Runoff = 3.80 cfs @ 12.09 hrs, Volume= 12,607 cf, Depth= 3.60" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 1.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 10-Year Rainfall=4.50" Area (sf) CN Description 6,702 61 >75% Grass cover, Good, HSG B * 35,296 98 Pavement & Roof 41,998 92 Weighted Average 6,702 15.96% Pervious Area 35,296 84.04% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Segment A Summary for Link AP1: Inflow Area = 41,998 sf, 84.04% Impervious, Inflow Depth = 3.60" for 10-Year event Inflow = 3.80 cfs @ 12.09 hrs, Volume= 12,607 cf Primary = 3.80 cfs @ 12.09 hrs, Volume= 12,607 cf, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 1.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 100-Year Rainfall=6.40"Cutlery Printed 2/8/2022Prepared by OHI Engineering, Inc. Page 5HydroCAD® 10.10-4b s/n 11276 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment EXISTING: Runoff = 5.63 cfs @ 12.09 hrs, Volume= 19,120 cf, Depth= 5.46" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 1.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 100-Year Rainfall=6.40" Area (sf) CN Description 6,702 61 >75% Grass cover, Good, HSG B * 35,296 98 Pavement & Roof 41,998 92 Weighted Average 6,702 15.96% Pervious Area 35,296 84.04% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Segment A Summary for Link AP1: Inflow Area = 41,998 sf, 84.04% Impervious, Inflow Depth = 5.46" for 100-Year event Inflow = 5.63 cfs @ 12.09 hrs, Volume= 19,120 cf Primary = 5.63 cfs @ 12.09 hrs, Volume= 19,120 cf, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 1.00-72.00 hrs, dt= 0.05 hrs PROPOSED AP1 Routing Diagram for Cutlery-Post Prepared by OHI Engineering, Inc., Printed 2/8/2022 HydroCAD® 10.10-4b s/n 11276 © 2020 HydroCAD Software Solutions LLC Subcat Reach Pond Link Cutlery-Post Printed 2/8/2022Prepared by OHI Engineering, Inc. Page 2HydroCAD® 10.10-4b s/n 11276 © 2020 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (sq-ft) CN Description (subcatchment-numbers) 6,132 61 >75% Grass cover, Good, HSG B (PROPOSED) 39,151 98 Pavement & Roof (PROPOSED) Type III 24-hr 2-Year Rainfall=3.00"Cutlery-Post Printed 2/8/2022Prepared by OHI Engineering, Inc. Page 3HydroCAD® 10.10-4b s/n 11276 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment PROPOSED: Runoff = 2.61 cfs @ 12.09 hrs, Volume= 8,506 cf, Depth= 2.25" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 1.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 2-Year Rainfall=3.00" Area (sf) CN Description 6,132 61 >75% Grass cover, Good, HSG B * 39,151 98 Pavement & Roof 45,283 93 Weighted Average 6,132 13.54% Pervious Area 39,151 86.46% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Segment A Summary for Link AP1: Inflow Area = 45,283 sf, 86.46% Impervious, Inflow Depth = 2.25" for 2-Year event Inflow = 2.61 cfs @ 12.09 hrs, Volume= 8,506 cf Primary = 2.61 cfs @ 12.09 hrs, Volume= 8,506 cf, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 1.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 10-Year Rainfall=4.50"Cutlery-Post Printed 2/8/2022Prepared by OHI Engineering, Inc. Page 4HydroCAD® 10.10-4b s/n 11276 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment PROPOSED: Runoff = 4.18 cfs @ 12.09 hrs, Volume= 13,992 cf, Depth= 3.71" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 1.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 10-Year Rainfall=4.50" Area (sf) CN Description 6,132 61 >75% Grass cover, Good, HSG B * 39,151 98 Pavement & Roof 45,283 93 Weighted Average 6,132 13.54% Pervious Area 39,151 86.46% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Segment A Summary for Link AP1: Inflow Area = 45,283 sf, 86.46% Impervious, Inflow Depth = 3.71" for 10-Year event Inflow = 4.18 cfs @ 12.09 hrs, Volume= 13,992 cf Primary = 4.18 cfs @ 12.09 hrs, Volume= 13,992 cf, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 1.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 100-Year Rainfall=6.40"Cutlery-Post Printed 2/8/2022Prepared by OHI Engineering, Inc. Page 5HydroCAD® 10.10-4b s/n 11276 © 2020 HydroCAD Software Solutions LLC Summary for Subcatchment PROPOSED: Runoff = 6.14 cfs @ 12.09 hrs, Volume= 21,048 cf, Depth= 5.58" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 1.00-72.00 hrs, dt= 0.05 hrs Type III 24-hr 100-Year Rainfall=6.40" Area (sf) CN Description 6,132 61 >75% Grass cover, Good, HSG B * 39,151 98 Pavement & Roof 45,283 93 Weighted Average 6,132 13.54% Pervious Area 39,151 86.46% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Segment A Summary for Link AP1: Inflow Area = 45,283 sf, 86.46% Impervious, Inflow Depth = 5.58" for 100-Year event Inflow = 6.14 cfs @ 12.09 hrs, Volume= 21,048 cf Primary = 6.14 cfs @ 12.09 hrs, Volume= 21,048 cf, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 1.00-72.00 hrs, dt= 0.05 hrs Appendix P – Blastox Information & MSDS BLASTOX® HOW DOES BLASTOX® WORK? There are multiple stabilization mechanisms for Blastox® . These are summarized by the following: 1) encapsulating hydration reactions; 2) addition and substitution reactions between heavy metal cations and calcium silicates; and 3) a pH adjustment. The pH adjustment is a result of hydration reactions, immobilizing the lead ions and allowing the remaining chemical reactions to occur. The lead is chemically converted from a soluble form (like lead oxide or lead hydroxide) to a stable lead salt (i.e., lead silicate). Blastox® uses an EPA BDAT stabilization process. Please contact TDJ Technical Services for more information. Long Term Stability data indicate that spent Blastox® blended abrasives repeatedly pass the EPA long-term stability test, i.e., Multiple Extraction Procedure (MEP). That test subjects a sample to 1 TCLP test, then nine (9) back to back tests in an acidic solution of pH 3.0. The MEP is designed to simulate long-term acid exposure in a landfill. In addition, spent Blastox® blended abrasives have passed multiple TCLP tests on the same waste sample. Similarly, spent Blastox® blended abrasives pass the Synthetic Precipitation Leach Procedure (SPLP) as well as neutral leach testing. The TDJ Group, Inc. 1-800-BLASTOX The TDJ Group, Inc. 760-A Industrial Drive 847-639-1113 Phone 009 Cary IL 60013 847-639-0499 Fax web www.blastox.com e mail tdj@blastox.com BLASTOX® TECHNICAL BULLETIN TB-006 Issued 1-98 BLASTOX® STABILIZATION REACTIONS The EPA has published a list of what it deems the Best Demonstrated Available Technologies (BDAT) for the stabilization of D008 and P+U Lead Wastes. Lead-based paint debris are included in this classification. BDAT stabilization technologies include "lime/fly ash mixtures, cement, concrete mixtures, or other proprietary or non-proprietary formulations". Blastox® uses these chemistries. The leachability of lead is affected by two factors: the chemical form of the lead, and the pH of the leachate. (Temperature can also slightly affect lead leachability, but the affect is minimal). The leachability of lead can be 'masked' or temporarily minimized by plating or pH buffering reactions. A plating reaction is one which the lead plates (adheres) to the surface of pure iron. Lead will not plate to iron oxide (rust). Once iron is exposed to environmental conditions that initiate the formation of iron oxide, the lead plating reactions reverse themselves and the lead becomes available for leaching. Lead solubility can also be minimized by controlling the pH of the leaching solution. Once the buffering effect is overcome, however, lead may become available for leaching. Blastox® utilizes an initial pH adjustment followed by additional stabilization reactions that produce a long term stable waste. The stabilization of lead by Blastox® occurs in three steps: 1. The addition of Blastox® creates an alkaline matrix in which lead is stable. This elevated pH instantaneously stabilizes the lead. 2. Silicate reactions change the chemical form of the lead from a lead oxide, carbonate, or hydroxide to a lead silicate which is insoluble. 3. Hydration reactions encapsulate the waste into a cementitious mass which limits the gravitational flow of water. The above reactions occur simultaneously and all are equally important in the stabilization of lead waste. The silicate and hydration reactions promote the long term stability of the waste. The end result of the three reactions is an encapsulated, insoluble lead silicate. The change in alkalinity (pH) is a by- product of the silicate and hydration reactions and is not the primary stabilizing reaction. The resulting lead silicate will not leach into acidic, neutral, or basic solutions. The reactions are not reversible. If Blastox® is present, the lead will be converted to a lead silicate and become insoluble. TECHNICAL DATA BLASTOX® 215 PRODUCT NAME Blastox® 215 PRODUCT DESCRIPTION: Blastox® 215 is a patented, fine granular, complex calcium silicate-based additive for stabilizing heavy metals including lead and cadmium. Other heavy metals can be stabilized with other TDJ product lines. OrDUCT DESCRIPTION USE: Dose rates vary based on untreated leachability rates. Exact dose rates can be verified by performing a treatability study. When resultant waste tests non-hazardous via the EPA TCLP test, it qualifies for disposal in a local subtitle D landfill. CHEMICAL REACTIONS: Blastox® 215 produces insoluble heavy metal compounds through chemical conversion, pH adjustment and physical encapsulation. RESTRICTIONS: Material must be kept dry until preparations are made for field application. TYPICAL PROPERTIES* SPECIFIC GRAVITY: 3.15 – 3.22 BULK DENSITY: 95 – 100 #/FT3 pH: 11.0-12.0 SOLUBILITY: (Slight) .1% - 1.0% SCREEN ANALYSIS :(~85%) (-) 52 – (+) 400 mesh per ASTM E-11 specification * *These data are results of historical production performance. AVAILABILITY Blastox 215 is manufactured at TDJ’s facilities in the Chicagoland area and sold through distributors. Product is available in bulk, super sacks and 70 lb multi-walled paper bags. Contact TDJ’s corporate office for pricing and your local distributor. TECHNICAL SERVICE Complete technical bulletins and information are available from TDJ’s corporate office or on the TDJ website at www.blastox.com. Technical assistance for specific applications is available by contacting the corporate office. BLASTOX® 215 WARRANTY All recommendations, statements and technical data contained herein are believed to be reliable and accurate, but are not to be construed as a warranty, expressed or implied. We accept no responsibility for results obtained by the application of this information. Unless otherwise specifically stated in a written supply contract, user assumes all responsibility and liability for loss or damage arising from the handling and use of this product. 12/05 Rev: 5/16 Blastox215TechData The TDJ Group, Inc. www.blastox.com 1-800-252-7869 Blastox 215 Safety Data Sheet (SDS) ® The TDJ Group, Inc. Date Prepared or Revised: October, 2015 SECTION 1: PRODUCT AND COMPANY INFORMATION Manufacturer TDJ Group, Inc., 760-A Industrial Dr., Cary, IL 60013 Telephone 847-639-1113 FAX (847) 639-0499 WEBSITE: www.blastox.com EMAIL: tdj@blastox.com Product Name(s) Blastox® 215 Recommended Uses / Restrictions Heavy metal stabilizer / Industrial or commercial use only Emergency Contact / Number Chemtrec: 800-424-9300; TDJ Group: 847-639-1113 SECTION 2: HAZARD IDENTIFICATION Hazards Eye damage/irritation Category 2B – Causes eye irritation Skin corrosion/irritation Category 2 – Causes skin irritation Specific Target Organ Toxicity (single occurrence) Category 3 – May cause respiratory irritation Signal Word WARNING Precautionary Statements: Wash hands and exposed areas thoroughly after handling. Wear protective gloves. Wear eye and face protection. Avoid breathing dust. Use only outdoors or in a well-ventilated area. If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical advice or attention. If on skin: Wash with plenty of water. If skin irritation occurs: Get medical advice or attention. Take off contaminated clothing and wash before reuse. If inhaled: Remove person to fresh air and keep comfortable for breathing. Call a poison center/doctor if you feel unwell. Store in a well-ventilated place. Keep container tightly closed. Dispose of contents or container in accordance with applicable regulations. SECTION 3: COMPOSITION/INFORMATION ON INGREDIENTS Component Name CAS# Component% Calcium silicates and aluminates See note >80 Magnesium oxide 1309-48-4 <5 Non-hazardous ingredients Proprietary Mixture Balance to 100% Note: Contains CAS 12168-85-3, 10034-77-2, 12042-78-3, and 12068-35-8 SECTION 4: FIRST AID MEASURES Most Important Symptoms / Effects: Eye contact with powder or solution can cause irritation or mechanical abrasion. Skin irritation can occur from contact with the product. Inhalation may cause coughing or mild irritation. Skin Contact: Wash exposed areas promptly with water and mild soap. Remove contaminated clothing immediately and launder before reuse. Seek medical advice or attention if irritation occurs. Eye Contact: Immediately flush eyes with water for at least 15 minutes. Remove contact lenses if easy to do. Seek medical attention if any symptoms persist. Inhalation: Move to fresh air. Keep at rest and in a position comfortable for breathing. If you feel unwell, seek medical advice. Ingestion: Do not induce vomiting. Wash out mouth with water. If vomiting occurs naturally, have victim lean forward to reduce the risk of aspiration. Seek immediate medical advice or attention. Indication of Immediate Medical Attention and Special Treatment, If Necessary: Persistent eye or skin irritation, difficulty in breathing. SECTION 5: FIREFIGHTING MEASURES Suitable and Unsuitable Extinguishing Media: Product does not burn. Use fire-fighting techniques appropriate to the surrounding fire. Specific Hazards Arising from the Chemical: None known. Special Protective Equipment and Precautions for Fire-Fighters: Use equipment and procedures appropriate to the surrounding fire. Page 1 of 3 Blastox 215 Safety Data Sheet (SDS) ® The TDJ Group, Inc. Date Prepared or Revised: October, 2015 SECTION 6: ACCIDENTAL RELEASE MEASURES Personal Precautions: Isolate release area and keep unnecessary or untrained people away. See Section 8 for personal protection gear. Environmental Precautions: Contain spill if it can be done with minimal risk. Prevent from entering drains, sewers or waterways. Material is not regulated by DOT or EPA. Methods for Cleaning Up: Avoid actions such as use of compressed air or vigorous dry sweeping that may cause dusting. Place material into container for later use, recycle or disposal. SECTION 7: HANDLING AND STORAGE Handling: Plant processes should be designed to minimize or control airborne dusts. All bags and containers should be properly labeled. Keep bags unopened until use. Keep containers tightly sealed when not in use. Use only with adequate ventilation. Wash hands at end of shift or before eating or using restroom. Wear gloves, goggles and appropriate clothing to avoid repeated or prolonged contact. Use good hygiene practices when handling product, including changing and laundering work clothes after use. Storage: Keep containers in a dry, cool, well-ventilated area. Keep containers tightly closed. SECTION 8: EXPOSURE CONTROL AND PERSONAL PROTECTION Exposure Limits Component Name ACGIH TLV-TWA OSHA PEL-TWA Particulate material 10 mg/m3 15 mg/m3 Calcium silicate 10 mg/m3 15 mg/m3 (total) 5 mg/m3 (respirable ) Magnesium oxide 10 mg/m3 15 mg/m3 Engineering Controls: Use appropriate ventilation to maintain airborne concentration limits below exposure limits. Have eye wash stations and safety showers readily available. Eye and Face Protection: Wear safety glasses or goggles to prevent dust from getting in eyes. Skin Protection: Wear water-proof gloves to prevent contact. Additional body garments should be used based upon the task being performed. Respiratory Protection: Use a properly fitted NIOSH respirator in areas where the exposure is unknown or above the OSHA PEL or ACGIH TLV. General Hygiene: Follow accepted work practices for handling an alkaline material. Do not eat, drink or smoke in areas where this chemical is used or stored. Wash thoroughly with soap and water after task or shift, when using the restroom or before eating. SECTION 9: PHYSICAL AND CHEMICAL PROPERTIES Appearance/Physical State Gray solid (powder) Flash Point Not Applicable Specific Gravity (Water=1) 3.15 Upper Flammability Limits Not Applicable Evaporation Point Not Applicable Lower Flammability Limits Not Applicable pH (in water) ~12 Auto-ignition Temperature Not Applicable Solubility in Water Slight (0.1 – 1%) Decomposition Temperature Not Determined Odor No distinct odor Vapor Pressure Not Applicable Odor Threshold Not Determined Vapor Density (Air-=1) Not Applicable Melting/Freezing Point >1000 °C Partition Coefficient (n-octanol/water) Not Applicable Boiling Range Not Applicable Viscosity (cSt , 40 °C) Not Applicable Initial Boiling Point Not Applicable Critical Temperature Not Determined Note: Physical and chemical properties are provided for safety, health and environmental considerations and do not fully represent product specifications. Those should be requested separately. Page 2 of 3 Blastox 215 Safety Data Sheet (SDS) ® The TDJ Group, Inc. Date Prepared or Revised: October, 2015 SECTION 10: STABILITY AND REACTIVITY Reactivity: None Chemical Stability: Stable when properly stored dry. Contact with water can produce calcium hydroxide. Possibility of Hazardous Reactions: Will not occur under recommended conditions Conditions to Avoid: Keep dry. Incompatible Materials: Acids, ammonia salts or aluminum Hazardous Decomposition Products: None SECTION 11: TOXICOLOGICAL INFORMATION Acute Effects: Aqueous solution can cause serious eye damage due to high alkalinity. Aqueous solution can cause severe skin irritation or burns due to high pH in water. Ingestion may cause burns or irritation to the linings of the mouth, throat, and gastrointestinal tract. Inhalation may be irritating or corrosive to the respiratory tract due to product’s alkaline nature. Target Organ Effects: Lungs and respiratory system: short-term or immediate effects of dust inhalation are expected to be coughing and mild respiratory irritation. Pre-existing Conditions Aggravated by Exposure: Respiratory or skin disorders Chronic Effects: Acute symptoms may be aggravated Carcinogenicity: Contains no components known by IARC, NTP or OSHA to be carcinogenic. Blastox® 215 has been analyzed and does not contain detectible amounts (<0.2%) of crystalline quartz which is known to be carcinogenic. SECTION 12: ECOLOGICAL INFORMATION Ecotoxicity: Not Determined Degradability: Not Determined Mobility: Not Determined Bioaccumulation: Not Determined SECTION 13: DISPOSAL CONSIDERATION Product is not regulated by EPA or DOT. Dispose in compliance with all applicable federal, state and local regulations. SECTION 14: TRANSPORT INFORMATION Proper Shipping Name: Not Regulated SECTION 15: REGULATORY INFORMATION TSCA Status: All components are listed in the TSCA inventory SARA 311/312 Reporting Categories: Acute hazard SARA 313 Reportable Ingredients: No ingredients listed SECTION 16: OTHER INFORMATION Department Issuing SDS Health and Safety Disclaimer While the information provided in this safety data sheet is believed to provide a useful summary of the hazards of Blastox 215 as it is commonly used, the sheet cannot, and does not, anticipate and provide all of the information that might be needed in every situation. In particular, the data furnished in this sheet does not address hazards that may be posed by other materials mixed with Blastox 215 products. Users therefore, should review other applicable safety data sheets before working with Blastox 215. The TDJ Group, Inc. makes no warranty, expressed or implied, concerning the product or the merchantability or fitness thereof for any purpose or concerning the accuracy of any information provided by TDJ Group, Inc., except that the product shall conform to contracted specifications. The information provided herein was believed by TDJ Group, Inc. to be accurate at the time of preparation or prepared from sources believed to be reliable. But it is the responsibility of the user to investigate and understand other pertinent sources of information. To comply with all laws and procedures applicable to the safe handling and use for the product, and to determine the suitability of the product for its intended use. Page 3 of 3 SDS BLASTOX 215 10.15