15150 - OM_LTPPP Revised 2023-12-06
November 1, 2023 Revised December 6, 2023
Long-Term Pollution Prevention Plan and
Stormwater Operation and Maintenance Plan
Smith College Lazarus-Wurtele Center
College Lane
Northampton, MA, 01603
Prepared for:
TenBerke Architects D.P.C.
220 Fifth Avenue, 7th Floor.
New York, NY, 10001
Prepared by:
Nitsch Engineering
2 Center Plaza, Suite 430
Boston, MA 02108
Nitsch Project #15150
Northampton, MA – Long-Term Pollution Prevention Plan and Stormwater Operation and Maintenance Plan
11/01/2023, 2023 | Nitsch #15150 i
TABLE OF CONTENTS
SECTION 1 INTRODUCTION ..................................................................................................................... 1
SECTION 2 LONG-TERM POLLUTION PREVENTION PLAN ................................................................... 2
Storage of Hazardous Materials .................................................................................................................... 2
Storage of Waste Products ............................................................................................................................ 2
Spill Prevention and Response ..................................................................................................................... 2
Minimize Soil Erosion .................................................................................................................................... 2
Vehicle Washing ............................................................................................................................................ 2
Maintenance of Lawns, Gardens, and other Landscaped Areas .................................................................. 3
Management of Deicing Chemicals and Snow .............................................................................................. 3
Coordination with other Permits and Requirements ...................................................................................... 3
SECTION 3 STORMWATER MANAGEMENT SYSTEM OPERATION AND MAINTENANCE PLAN......... 4
Introduction .................................................................................................................................................... 4
Stormwater Operation and Maintenance Requirements ............................................................................... 4
Street Sweeping ............................................................................................................................................ 7
Organic Waste and Leaf Litter Collection ...................................................................................................... 7
Repair of the Stormwater Management System ........................................................................................... 7
Estimated Operations and Maintenance Budget ........................................................................................... 8
Reporting ....................................................................................................................................................... 8
STORMWATER MANAGEMENT SYSTEM INSPECTION FORM ................................................................ 9
FIGURES ............................................................................................................................................... 10
Figure 1: Stormwater Management System Location Map .........................................................................10
Figure 2: Snow Storage Map .......................................................................................................................10
Northampton, MA – Long-Term Pollution Prevention Plan and Stormwater Operation and Maintenance Plan
11/01/2023 Revised 12/06/2023 | Nitsch #15150 1
SECTION 1 Introduction
The purpose of this document is to specify the pollution prevention measures and stormwater management
system operation and maintenance for the Smith College Lazurus-Wurtele Center site. The Responsible Party
indicated below shall implement the management practices outlined in this document and proactively conduct
operations at the project site in an environmentally responsible manner. Compliance with this Manual does not in
any way dismiss the responsible party, owner, property manager, or occupants from compliance with other
applicable federal, state or local laws.
Responsible Party: Trustees of the Smith College
Charlie Conant, Senior Project Manager
126 West Street
Northampton, MA 01063
413-585-2424
This Document has been prepared in compliance with Standards 4 and 9 of the 2008 Massachusetts Department
of Environmental Protection (MassDEP) Stormwater Management Standards, which state:
Standard 4
The Long-Term Pollution Prevention Plan shall include the proper procedures for the following:
1. Good housekeeping;
2. Storing materials and waste products inside or under cover;
3. Vehicle washing;
4. Routine inspections of stormwater best management practices;
5. Spill prevention and response;
6. Maintenance of lawns, gardens, and other landscaped areas;
7. Storage and use of fertilizers, herbicides, and pesticides;
8. Pet waste management;
9. Operation and management of septic systems; and
10. Proper management of deicing chemicals and snow.
Standard 9
The Long-Term Operation and Maintenance Plan shall at a minimum include:
1. Stormwater management system(s) owner(s);
2. The party or parties responsible for operation and maintenance, including how future property owners shall
be notified of the presence of the stormwater management system and the requirement for operation and
maintenance;
3. The routine and non-routine maintenance tasks to be undertaken after construction is complete and a
schedule for implementing those tasks;
4. A plan that is drawn to scale and shows the location of all stormwater BMPs in each treatment train along
with the discharge point;
5. A description and delineation of public safety features; and
6. An estimated operations and maintenance budget.
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SECTION 2 Long-Term Pollution Prevention Plan
The Responsible Party shall implement the following good housekeeping procedures at the project site to reduce
the possibility of accidental releases and to reduce safety hazards.
Storage of Hazardous Materials
To prevent leaks and spills, keep hazardous materials and waste products under cover or inside. Use drip pans
or spill containment systems to prevent chemicals from entering the drainage system. Inspect storage areas for
materials and waste products at least once per year to determine amount and type of the material on site, and if
the material requires disposal.
Securely store liquid petroleum products and other liquid chemicals in federally- and state-approved containers.
Restrict access to maintenance personnel and administrators.
Storage of Waste Products
Collect and store all waste materials in securely lidded dumpster(s) or other secure containers as applicable to
the material. Keep dumpster lids closed and the areas around them clean. Do not fill the dumpsters with liquid
waste or hose them out. Sweep areas around the dumpster regularly and put the debris in the garbage, instead
of sweeping or hosing it into the parking lot. Legally dispose of collected waste on a regular basis.
Segregate liquid wastes from solid waste and recycle through hazardous waste disposal companies, whenever
possible. Contact a hazardous waste hauler for proper disposal to a hazardous waste collection center.
Spill Prevention and Response
Implement spill response procedures for releases of significant materials such as fuels, oils, or chemical
materials onto the ground or other area that could reasonably be expected to discharge to surface or
groundwater.
1. For minor spills, keep fifty (50) gallon spill control kits and Speedy Dry at all shop and work areas.
2. Immediately contact applicable Federal, State, and local agencies for reportable quantities as required by
law.
3. Immediately perform applicable containment and cleanup procedures following a spill release.
4. Promptly remove and dispose of all material collected during the response in accordance with Federal,
State, and local requirements. A licensed emergency response contractor may be required to assist in
cleanup of releases depending on the amount of the release, and the ability of the Contractor to perform
the required response.
5. Reportable quantities of chemicals, fuels, or oils are established under the Clean Water Act and enforced
through MassDEP.
Minimize Soil Erosion
Soil erosion facilitates mechanical transport of nutrients, pathogens, and organic matter to surface water bodies.
Repair all areas where erosion is occurring throughout the project site. Stabilize bare soil with riprap, seed,
mulch, or vegetation.
Vehicle Washing
Vehicle washing will not occur within the covered service area.
Northampton, MA – Long-Term Pollution Prevention Plan and Stormwater Operation and Maintenance Plan
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Maintenance of Lawns, Gardens, and other Landscaped Areas
Pesticides and fertilizers shall not be used in the landscaped areas associated with the project site and shall not
be stored on-site. Dumping of lawn wastes, brush or leaves or other materials or debris is not permitted in any
Resource Area. Grass clippings, pruned branches and any other landscaped waste should be disposed of or
composted in an appropriate location. Site irrigation shall be used in the landscaped areas for this project.
Management of Deicing Chemicals and Snow
The qualified contractor selected for snow plowing and deicing shall be made fully aware of the requirements of
this section.
No road salt (sodium chloride) shall be stored on-site. The use of magnesium chloride de-icing product with a 0.5
to 1.0 percent sodium chloride mix for snow and ice treatment is permitted. The product shall be stored in a
locked room inside the building and shall be used at exterior stairs and walkways. The snow plow contractor shall
adhere to these magnesium chloride use and storage requirements.
During typical snow plowing operations, snow shall be pushed to the designated snow removal areas noted on
the Snow Storage Plan (Figure 2). Snow shall not be stockpiled in wetland resource areas or the 200-foot
Riverfront Area, catch basins, or bioretention basins. In severe conditions where snow cannot be stockpiled on
site, the snow shall be removed from the site and properly disposed of in accordance with DEP Guideline
BRP601-01.
Use of sand is permitted only for impervious roadways and parking areas. If sand is applied, the snow plowed
from impervious areas shall not be stored on porous asphalt.
Porous asphalt areas are proposed throughout the site, as indicated on the Stormwater Management System
Location Map (Figure 1). These areas will be delineated on-site using pavement markings. Porous asphalt
performs well in cold climates and can reduce meltwater runoff during the snowmelt period; however there are
specific winter management techniques that must be followed for porous asphalt systems.
The porous asphalt areas shall be maintained during snow events as provided below:
1. Apply anti-icing treatments only when absolutely necessary (in extreme events). It is not anticipated that
deicing chemicals will be required for typical winter events.
2. Plow as needed after storm events. Avoid scarifying the porous asphalt surface. Special plow blades
should be used whenever possible. Raised blade is not recommended.
3. Apply the minimum amount of deicing agents during and after storms required to control compact snow and
ice that are not removed by plowing.
4. Do not apply sand in porous asphalt areas “No Sanding” signs shall be posted before the first snowfall and
maintenance and snow removal contractors shall be made aware of this requirement.
Before winter begins, the property owner and the contractor shall review snow plowing, deicing, and stockpiling
procedures. Areas designated for stockpiling should be cleaned of any debris. Street and parking lot sweeping
should be followed in accordance with the Operation and Maintenance Plan.
Coordination with other Permits and Requirements
Certain conditions of other approvals affecting the long-term management of the property shall be considered
part of this Long-Term Pollution Prevention Plan. The Owner shall become familiar with those documents and
comply with the guidelines set forth in those documents.
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SECTION 3 Stormwater Management System Operation and Maintenance Plan
Introduction
This Operation and Maintenance Plan (O&M Plan) for Smith College Lazarus-Wurtele Center site is required
under Standard 9 of the 2008 MassDEP Stormwater Handbook to provide best management practices for
implementing maintenance activities for the stormwater management system in a manner that minimizes impacts
to wetland resource areas.
The Owner shall implement this O&M Plan and proactively conduct operations at the site in an environmentally
responsible manner. Compliance with this O&M Plan does not in any way dismiss the Owner from compliance
with other applicable Federal, State or local laws.
Routine maintenance during construction and post-development phases of the project, as defined in the
Operation and Maintenance Plan, shall be permitted without amendment to the Order of Conditions. A continuing
condition in the Certificate of Compliance shall ensure that maintenance can be performed without triggering
further filings under the Wetlands Protection Act.
All stormwater best management practices (BMPs) shall be operated and maintained in accordance with the
design plans and the Operation and Maintenance Plan approved by the issuing authority. The Owner shall:
1. Maintain an operation and maintenance log for the last three years, including inspections, repairs,
replacement, and disposal (for disposal the log shall indicate the type of material and the disposal location).
This is a rolling log in which the responsible party records all operation and maintenance activities for the
past three years.
2. Make this log available to MassDEP and the Conservation Commission upon request; and
3. Allow members and agents of the MassDEP and the Conservation Commission to enter and inspect the
premises to evaluate and ensure that the Owner complies with the Operation and Maintenance
requirements for each BMP.
Stormwater Operation and Maintenance Requirements
Inspect and maintain the stormwater management system as directed below. Refer to the Stormwater
Management System Location Map (Figure 1) for the location of each component of the system. Repairs to any
component of the system shall be made as soon as possible to prevent any potential pollutants (including silt)
from entering the resource areas.
Deep Sump and Hooded Catch Basins
Inspect or clean catch basins four times per year and at the end of foliage and snow-removal seasons. Other
inspection and maintenance requirements include:
1. Remove organic material, sediment and hydrocarbons four times per year or whenever the depth of
deposits is greater than or equal to one half the depth from the bottom of the invert of the lowest pipe in the
basin.
2. Always clean out catch basins after street sweeping. If any evidence of hydrocarbons is found during
inspection, immediately remove the material using absorbent pads or other suitable measures and dispose
of legally. Remove other accumulated debris as necessary.
3. If handling runoff from land uses with higher potential pollutant loads or discharging runoff near or to a
critical area, more frequent cleaning may be necessary.
4. Transport and disposal of accumulated sediment off-site shall be in accordance with applicable local, state
and federal guidelines and regulations.
Northampton, MA – Long-Term Pollution Prevention Plan and Stormwater Operation and Maintenance Plan
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Permeable Pavers
Porous pavement areas are proposed throughout the site, as indicated on the Civil Utility Plan.
Frequent cleaning and maintenance of the porous pavement surface is critical to prevent clogging. Frequent
vacuum sweeping along with jet washing of porous pavement is required. No winter sanding shall be conducted
on the porous surface. For proper maintenance:
1. Post signs identifying porous pavement areas.
2. Minimize salt use during winter months.
3. No winter sanding is allowed.
4. Keep landscaped areas well maintained to prevent soil from being transported onto the pavement.
5. Regularly monitor the porous pavement surface to make sure that it drains properly after storm events.
Inspect surface annually for deterioration or spalling.
6. At a minimum, the porous pavement shall be cleaned after the winter season and every three months
thereafter. This requirement may be adjusted as needed, based on regular visual inspections of the porous
pavement surface.
7. For porous asphalts and concretes, clean the surface using power washer to dislodge trapped particles and
then vacuum sweep the area.
8. For paving stones, add joint material to replace material that has been transported. Reseed grass pavers to
fill in bare spots.
9. Never reseal or repave with impermeable materials.
10. Once per year, the infiltrative capacity of the porous pavement should be tested by running a hose over
each porous pavement area for 30 minutes.
11. Sections of damaged porous asphalt (rutting, etc.) can be repaired by heating and rerolling the asphalt.
12. When infiltrative capacity of porous pavement is reduced to less than the design rate, the porous pavement
shall be replaced by milling to the choker course.
13. Attach rollers to the bottoms of snowplows to prevent them from catching on the edges of grass pavers and
some paving stones.
Silt Prison
Maintain water quality units according the recommendations set forth by the manufacturer. General inspection
and maintenance procedures for proprietary devices are provided below:
1. Inspect units following completion of construction, monthly prior to being put into service.
2. Inspect units at least twice per year following installation and no less than once per year thereafter.
3. Inspect units immediately after any oil, fuel or chemical spill.
4. All inspections shall include checking the oil level and sediment depth in the unit. Removal of
sediments/oils shall occur biannually via vactoring.
5. A licensed waste management company shall remove captured petroleum waste products from any oil,
chemical or fuel spills and dispose.
6. OSHA confined space entry protocols shall be followed if entry into the unit is required.
7. The granular fill shall be inspected and replaced annually to maximize continued phosphorus removal by
using a minimum 5 horsepower shop vacuum with a minimum 1-1/2” house to vacuum any of the granular
fill and replacing with approximately 11-14 cubic feet of granular fill.
Area Drains
Inspect area drains at least once per month and remove debris from the grate. Clean out accumulated sediments
at least once per year and more frequently as necessary.
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Green Roofs
Perform routine maintenance on all components of the green roofs as directed by the system manufacturer. This
includes monitoring the planting system and maintaining healthy vegetation.
Landscape Filter
Inspect access basins in the landscape filter at least once per year and more frequently as necessary.
Vegetated Swales
Vegetated swales shall be inspected twice per year during the first year after construction. In subsequent years,
the swales shall be inspected annually and after rain events greater than 3 inches in 24 hours. Inspection and
maintenance procedures for drainage channels are provided below:
1. Inspect the riprap on the channel bottom and side slopes for signs of erosion and formation of rills and
gullies. Replace riprap as necessary.
2. Inspect channels the first few months after construction and twice per year thereafter to make sure
vegetation is adequate and for signs of rilling and gullying. Repair any rills or gullies. Replace dead
vegetation.
3. Remove accumulated trash and debris annually.
4. Remove sediment as needed at least once per year. Use hand methods (i.e. a person with a shovel) when
cleaning to minimize disturbance to vegetation and underlying soils.
5. Mow as necessary. Grass height shall be between 3 and 6 inches.
6. Reseed as necessary.
7. Check Dams: Inspect check dams after every significant rainfall event. Repair damage as needed. Remove
sediment as needed.
Northampton, MA – Long-Term Pollution Prevention Plan and Stormwater Operation and Maintenance Plan
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Bioretention Areas
Perform annual maintenance of all components of the bioretention area, including plants, soil, and mulch. Table
1, below, outlines recommended maintenance activities.
Table 1. Bioretention area maintenance recommendations
Location Description Frequency Time of
Year
Surface Inspect and remove trash Monthly Year round
Soil Inspect and repair erosion Monthly Year round
Organic Layer
Remulch void areas Annually Spring
Remove previous mulch layer before applying
new layer (optional) Annually Spring
Plants
Water vegetation at end of day for 14
consecutive days after planting
Immediately
after planting As needed
Fertilize Annually Spring
Mow grass 2 to 12 times
per year As needed
Remove and replace all dead and diseased
vegetation that cannot be treated Annually Spring
Treat all diseased trees and shrubs As needed Variable
During and after storm events, record the length of time standing water remains in the bioretention areas. If the
time is greater than 72 hours, thoroughly inspect the basins for signs of clogging and develop a corrective action
plan. The corrective action plan, prepared by a qualified professional, will outline procedures to restore infiltrative
function. The owner of the site shall take immediate action to implement these corrective measures. Inspect
pretreatment devices and bioretention cells regularly for sediment build-up, structural damage, and standing
water. Never store snow in bioretention areas.
Street Sweeping
Nitsch Engineering does not take credit for street sweeping of the site for annual load reduction of Phosphorus
and TSS calculations as part of the Project.
Organic Waste and Leaf Litter Collection
Nitsch Engineering does not take credit for collection of organic waste and leaf litter for annual load reduction of
Phosphorus and TSS calculations as part of the Project.
Repair of the Stormwater Management System
The stormwater management system shall be maintained. The repair of any component of the system shall be
made as soon as possible to prevent any potential pollutants including silt from entering the resource areas or
the existing closed drainage system.
8
Estimated Operations and Maintenance Budget
An Operations and Maintenance Budget was prepared in compliance with the MassDEP Stormwater Standards.
Table 2. Operations and Maintenance Budget
BMP Type # of BMPs Annual O & M Cost
(per BMP) Total Cost
Catch Basin with Silt Prisons 5 $240-$480 $1,200-$2,400
Area Drain 6 $60-$120 $360-$720
Bioretention Basin 11 $240-$480 $2,640-$5,280
Permeable Pavers 3 $200-$400 $600-$1,200
Total: $5,340-$10,800
Reporting
The Owner shall maintain a record of drainage system inspections and maintenance (per this Plan) and submit a
yearly report to the Northampton Conservation Commission.
Northampton, MA – Long-Term Pollution Prevention Plan and Stormwater Operation and Maintenance Plan
11/01/2023 | Nitsch #15150 9
STORMWATER MANAGEMENT SYSTEM INSPECTION FORM
SMITH COLLEGE Inspected by:____________
Northampton, MA Date:____________
Component Status/Inspection Action Taken
Deep Sump Catch Basins,
Area Drains and Drain
Manholes
Bioretention Basin
Water Quality Units
Silt Prison
Permeable Pavers
General site conditions –
evidence of erosion, etc.
SUBMIT COPIES OF STORMWATER MANAGEMENT SYSTEM INSPECTION FORM TO THE
NORTHAMPTON CONSERVATION COMMISSION WITH THE YEARLY REPORT.
10
FIGURES
Figure 1: Stormwater Management System Location Map
Figure 2: Snow Storage Map