Stormwater OandM 5-6-24ATTACHMENT A
Stormwater Facility Maintenance Schedule
Name of Project: Proposed Mixed Use Building
Project Location: 81 Maple Street and 100 Main Street, Florence MA
Assessor’s Map, Parcel(s): 23A-067and 23A-068
Owner of the Stormwater System:
The Stormwater management system will be owned and operated by Om Bhavya Inc and Om Shiv Gauri Inc. it's successor's or assign's.
Responsible Party for Operation & Maintenance of Stormwater System
Operation and maintenance of stormwater management system will be the responsibility of the Owners.
Financial Responsibility for Operation & Maintenance of Stormwater System:
Financial Responsibility for Operation and maintenance of stormwater management system will be the responsibility of the Owners.
Stormwater Maintenance Schedule
Inspect and clean as needed all sediment removal devices (i.e. catch basins) four times a year to remove accumulated sand, sediment, and floatable products or as needed based on use.
Clean annually or as accumulated debris dictate when sump is 50% full.
CDS Water Quality Unit maintenance
Initial Operation - Check the condition of the unit after every runoff event for the first 30 days. The visual inspection should ascertain that the unit is functioning properly (no blockages
or obstructions to inlet and/or separation screen), measuring the amount of solid materials that have accumulated in the sump, the amount of fine sediment accumulated behind the screen,
and determining the amount floating trash and debris in the separation chamber. This can be done with a calibrated “dip stick” so that the depth of deposition can be tracked. Schedules
for inspections and cleanout should be based on storm events and pollutant accumulation.
Ongoing Operation - During the rainfall season, the unit should be inspected at least once every 30 days. The floatables should be removed and the sump cleaned when the sump is 50% full.
If floatables accumulate more rapidly than the settleable solids, the floatables should be removed using a vactor truck or dip net before the layer thickness exceeds one to two feet.
Cleanout of the CDS unit at the end of spring season is recommended.
CULTEC Sub-surface Basins
The CULTEC system may be equipped with inspection ports located on the inlet row. The inspection ports are circular cast boxes placed in a rectangular concrete collar. When the lid is
removed, a 6-inch (150 mm) pipe with a screw-in plug will be exposed. Remove the plug. This will provide access to the CULTEC Chamber row below. From the surface, through this access,
the sediment may be measured at this location. A stadia rod may be used to measure the depth of sediment if any in this row. CCTV inspection of this row can be deployed through this
access port to determine if any sediment has accumulated in the inlet row. If
significant sediment is observed to be accumulating in the chamber, the pretreatment devised is not performing as designed and should be inspected. If ponding is observed in the chambers
occurring 72 hours after a storm, the basin is not performing as designed and maintenance, repair or reconstruction of the chamber system is required. Sub-surface systems should be
inspected and maintained as needed in accordance with manufacturers recommended maintenance guidelines on a annual basis and after significant storm events of two years or greater.
Paved areas will be swept, at a minimum, two times per year in the months of May and October.
All sediments and hydrocarbons should be properly handled and disposed, in accordance with local, state and federal guidelines and regulations outside any drainage facilities or resource
areas, including buffer zone to the resource area.
Record Keeping and Annual Reports
Records shall be maintained by the Property Managers at their offices as described above and shall document all routine and emergency maintenance work performed by the Property Managers
or under the supervision of the Property Managers to the stormwater management system and shall bear the signature of the individual supervising the work.
Annual reports documenting the inspection, maintenance, and proper functioning of the stormwater management system in accordance with the approved design shall be certified by a Registered
Professional Engineer and submitted to the Northampton Department of Public Works and the Northampton Office of Planning and Development no later than October 1st of each year. The
annual report shall document any deficiencies in function or maintenance of the stormwater management system and include a plan to correct the deficiencies.