restormwaterpermitcomplianceasbuilt
Rockridge_OandM Agreement with Attachment A.PDF
Attachment 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 CONSTRUCTION Note: BMP's shall be visually inspected
and repaired by a qualified party in accordance with the following chart. Note these are minimum inspection criteria/frequencies and 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." C o n v e n t i o n a l & L I D B e s t M a n a g e m e n t P r a c t i c e s R e c o m m e n d e d M i n i m u m I n s p e c t i o n & M a i n t e n a n c e F r e
q u e n c y E r o s i o n / S c o u r i n g T r e e G r o w t h H a z a r d s D i f f e r e n t i a l S e t t l e m e n t / S e e p a g e S t r u c t u r a l D a m a g e / O b s t r
u c t i o n s T r a s h & D e b r i s R e m o v a l o f A c c u m u l a t e d S e d i m e n t S l o p e I n t e g r i t y * M o w V e g e t a t i o n / P o o r V e g e t a t i o n C
o v e r a g e R e m o v e / R e s e t F i l t e r F a b r i c & S t o n e A s R e q u i r e d C h e c k R e m o v e & R e p l a c e m u l c h / m e d i a / s t o n e R e m o v e /
R e s e t R i p r a p a s R e q u i r e d Deep Sump Catch BasinQuarterly Outlet StructureSemi-Annual Water Quality InletAnnually Porous PavementAnnually Emergency
OverflowSemi-Annual Level SpreaderAnnually U/G Detention BasinSemi-Annual Energy DissipatersAnnually
Rockridge_SW Management Permit Compliance 2-7-17.pdf Microsoft Word - Rockridge_SW Management Permit Compliance
ProTerra Design Group, LLC Ph:(413)320‐4918 4 Bay Road, Building A, Suite 200 E: info@proterra‐design.com Hadley, MA 01035 U/G Detention System Observation Manhole U/G Detention System Backfil
l U/G Detention Perforated Pipe Porous Pavement Choker Stone Porous Asphalt Pavement Stabilized Discharge Point with FES and Riprap
As-Built Conditions Plan Addition to Rockridge Retirement Community 02-07-17.pdf Layout1
LEGEND AB-1 NORTHEAST SURVEY CONSULTANTS