Rockridge_OandM Agreement with Attachment AAttachment A: Stormwater Facility Maintenance Schedule Page 1 of 3
ATTACHMENT A
Stormwater Facility Maintenance Schedule
Name of Project: Proposed Addition to Rockridge Retirement Facility
Project Location: 25 & 37 Coles Meadow Road
Assessor’s Map, Parcel(s): Map 13, Block 073, Lot 001
Owner of the Stormwater System:
New England Deaconess Association, 80 Deaconess Road, Concord, MA 01742
Responsible Party for Operation & Maintenance of Stormwater System
Rockridge Retirement Facility, c/o Deaconess Abundant Life Communities, 25 & 37 Coles
Meadow Road, Northampton, MA 01060
Financial Responsibility for Operation & Maintenance of Stormwater System:
Rockridge Retirement Facility, c/o Deaconess Abundant Life Communities, 25 & 37 Coles
Meadow Road, Northampton, MA 01060
Maintenance Schedule
Porous Pavement – 1 time per year
During the construction phases of the project, the porous pavement shall be inspected and
cleaned as necessary after storm events with 1” of rainfall or greater. Thereafter, it shall be
inspected and cleaned at least once per year or as needed during the owner’s regular maintenance
of the grounds. The porous pavement shall be monitored to ensure that the paving surface drains
properly after storms. Cleanings shall include using power washer to dislodge trapped particles
and then vacuum sweep the area. Winter sanding and salting shall be avoided on the porous
pavements.
Deep Sump Catch Basins – 4 times per year
During the construction phases of the project, the deep sump catch basins shall be inspected
monthly to monitor the sediment accumulation and sediment removed as necessary after storm
events with 1” of rainfall or greater. Thereafter, the deep sump catch basins shall be inspected
every three months or as needed during the owner’s regular maintenance of the grounds.
Maintenance shall include cleaning the units during dry weather when half of the sump capacity
is filled. Any obstructions, sediment, and debris that could potentially cause clogs shall be
removed within the stormwater conveyance system. Inverts, grates, and hoods shall be checked
and replaced as necessary to maintain hydraulic effectiveness.
Water Quality Inlets – 1 time per year
Water quality inlets shall be inspected and cleaned in accordance with the manufacturer’s
recommendations, but no less than inspected twice a year following installation. Thereafter,
these structures shall be inspected no less than once a year. Cleanings shall include removal of
sediment and other trapped pollutants.
Attachment A: Stormwater Facility Maintenance Schedule Page 2 of 3
U/G Detention Basins with Exfiltration – 2 times per year
The underground detention facilities have been designed with riser structures at grade to aid the
removal of sediment and debris accumulating in the structure. Once the system goes online,
inspections should occur after each storm event for the first few months to ensure proper
stabilization, function, and to ensure that the outlets remain free of obstructions. Thereafter, this
structure shall be inspected and cleaned at least twice per year or as needed during the owner’s
regular maintenance of the grounds. Cleanings shall include removal of accumulated sediment,
inspection of the detention structure, and monitoring groundwater and infiltration rates to ensure
proper operation of the systems. Items to note during inspections include differential settlement,
cracking, break-out, clogging of outlets and vents, and root infestation. Water levels should be
checked and recorded against rainfall amounts to verify the drainage system is working properly.
During the construction phases of the project, the underground detention basin outlet structures
shall be inspected monthly to monitor the sediment accumulation and sediment removed as
necessary after storm events with 1” of rainfall or greater. Thereafter, the underground detention
basin outlet structures shall be inspected and cleaned at least twice per year or as needed during
the owner’s regular maintenance of the grounds. Maintenance shall include cleaning the
structures during dry weather typically at the same time as the underground detention basin. Any
obstructions, sediment, and debris that could potentially cause clogs shall be removed within the
stormwater conveyance system. Inverts and orifices shall be checked and replaced as necessary
to maintain hydraulic effectiveness.
Level Spreaders/Energy Dissipates – 1 time per year
During the construction phases of the project, the level spreaders shall be inspected monthly and
cleaned as necessary and/or after storms events with 1” of rainfall or greater. Thereafter, these
structures shall be inspected and cleaned at least once per year or as needed during the owner’s
regular maintenance of the grounds. Cleanings shall include removal of vegetation, and removal
of excess debris.
During the construction phases of the project, the rip rap energy dissipaters shall be inspected
monthly and cleaned as necessary and/or after storms events with 1” of rainfall or greater.
Thereafter, these structures shall be cleaned at least once per year or as needed during the
owner’s regular maintenance of the grounds. Cleanings shall include removal of vegetation,
removal of excess sediment accumulation and inspection of condition of stone.
Vacuum Assist Street Sweeping – 2 times per year
Soils deposited on paved surfaces shall be swept or cleaned as needed to reduce the potential of
sediment transport and tracking. Sweeping operations consist of scraping large quantities of
sediment from pavement and/or sweeping, via hand or mechanical means to remove as much
deposited sediment as possible. During construction, all streets within and immediately
surrounding the construction site shall be cleaned of earth material when sediment has been
deposited on the roadway and is being tracked off-site. After construction, driveways and
parking areas within the site shall be swept with vacuum assist at least twice per year to remove
sediment that potentially could clog infiltration systems or storm sewers.
Attachment A: Stormwater Facility Maintenance Schedule Page 3 of 3
Record Keeping and Annual Reports
Records shall be maintained by Director of Building Services at their offices as described above
and shall document all routine and emergency maintenance work performed by various vendors
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.
LONG TERM STRUCTURAL BEST MANAGEMENT PRACTICE INSPECTION & MAINTENANCE MATRIX AFTER CONSTRUCTIONNote: BMP's shall be visually inspected and repaired by a qualified party in accordance with the following chart. Note these are minimum inspection criteria/frequenciesand should be adjusted throughout the project lifespan as required to maintain effectiveness. Refer to maintenance standards for drainage facilities and structural best management practices in the "Recommended Long-Term Stormwater Pollution Prevention Plan."Conventional & LID Best Management PracticesRecommended Minimum Inspection & Maintenance FrequencyErosion/ScouringTree Growth HazardsDifferential Settlement/SeepageStructural Damage/ObstructionsTrash & DebrisRemoval of Accumulated SedimentSlope Integrity*Mow Vegetation/Poor Vegetation CoverageRemove/Reset Filter Fabric & Stone As RequiredCheck - Remove & Replace mulch/media/stoneRemove/Reset Riprap as RequiredDeep Sump Catch Basin QuarterlyOutlet Structure Semi-Annual Water Quality Inlet AnnuallyPorous Pavement Annually Emergency Overflow Semi-Annual Level Spreader Annually U/G Detention Basin Semi-AnnualEnergy Dissipaters Annually