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HomeMy WebLinkAbout2016-02-16 Stormwater Management System Inspection & Maintenance Plan I I d STORMWATER MANAGEMENT SYSTEM INSPECTION & MAINTENANCE PLAN FOR C&C Auto Corporation 1812 TURNPIKE STREET NORTH ANDOVER,MA I PREPARED FOR: C&C AUTO CORPORATION 268 RALEIGH TAVERN LANE NORTH ANDOVER, MA 01845 PREPARED BY: HAIGHT ENGINEERING, PLLC P.O. Box 1166 DovER,NH 03820 FEBRUARY 8, 2016 STORMWATER MANAGEMENT SYSTEM INSPECTION & MAINTENANCE PLAN Introduction Haight Engineering, PLLC. has prepared the following Stormwater System Inspection & Maintenance Plan for C&C Auto Corp. auto repair facility located at 1812 Turnpike Street, Tax Map 210/106D 0047 in North Andover, MA. The intent of this plan is to provide C&C Auto Corp. with a list of procedures that document the inspection and maintenance requirements of the Stormwater Management System for this site. The following inspection and maintenance program is necessary in order to keep the Stormwater Management System functioning properly. By following the enclosed procedures, C&C Auto Corp. will be able to maintain the functional design of the Stormwater Management System and maximize its ability to remove sediment and other contaminants from site generated stormwater runoff. This facility will predominately be for vehicle maintenance and repair of automobiles, and light trucks. In general, potential pollutant sources include the storage and handling of vehicles, solvents, cleaning chemicals, waste materials, vehicle liquids, batteries, and washing of parts, and equipment and potential pollutants include waste oil, solvents, degreasers, antifreeze, radiator flush, acid solutions with chromium, zinc, copper, lead and cadmium, brake fluid, soiled rags, oil filters, sulfuric acid and battery sludge, and machine chips in residual machining oil. In all cases vehicle repairs and maintenance shall occur within the building and vehicles awaiting repair shall not be parked on porous pavement sections. The porous pavement sections are an integral component of the stormwater mitigation system for this site and as such the integrity of the porous pavement section must be maintained. At no time should the porous pavement areas every be overlaid with standard pavement nor seal coated. If any part of the porous pavement sections become clogged they should be cleaned and if damaged the compromised sections should be replaced. C&C Auto Corp. shall maintain spill kits on site at all times. (Such as U-Line universal drum spill kit. ((http://www.uline.com)). The Owner shall prepare an emergency spill response and cleanup plan and have designated trained person(s) available either on- site or on call at all times to promptly and properly implement that plan and immediately cleanup all spills. 2 Revised 2/8/16 i STORMWATER MANAGEMENT SYSTEM l INSPECTION & MAINTENANCE PLAN Stormwater Management System Components_ The C&C Auto Corp. Stormwater Management System is designed to mitigate the quality of site-generated stormwater runoff. As a result, its design includes the following elements; Non-Structural BMP's Non-structural best management practices (BMP's) are designed to minimize and/or remove contaminants. Several of these BMP's have been incorporated into the Stormwater Management System including pavement sweeping/vacuuming, reduced use of road salt, and litter/trash removal. These types of BMP's are highly effective initial treatment measures for reducing stormwater pollutant loading. Operational BMP's Owner shall prepare an emergency spill response and cleanup plan and have designated trained person(s) available either on-site or on call at all times to promptly and properly implement that plan and immediately cleanup all spills. The Owner shall keep suitable cleanup materials, such as dry adsorbent materials, on-site to allow prompt cleanup of a spill and shall train employees on the proper use of spill clean-up materials. Materials to be stored on site shall be stored in-doors in suitable containers. Refer to MassDEP webpage http://mass,gov/dep/cleanup/dealin0l.htm for reporting criteria in the event of a spill. Existing site_drain There is an existing 6" drain located at the face of the retaining wail at the "southerly" end of the site. This drain is the outflow for the drainage from the paved parking lot. Regular review and maintenance will be required to ensure that the inlet is clear of anyobstruction that may hinder free flow during a rain event. Roof Drain Piping System The roof drainage system is limited to roof drains designed to collect and convey a large portion of the roof runoff directly into the proposed infiltration basin to the rear of the building as well as directly to the porous pavement area next to the building. This will allow for controlled exfiltration into the existing sandy soils. Infiltration Basin The infiltration basin has been located and designed to hold and infiltrate roof and site-generated stormwater runoff. Discharge from the basin is controlled by the stone reservoir allowing exfiltration into the ground. In the event that the basin backs up the basin has been designed to allow any overflow to discharge to the front parking lot thereby keeping all site generated stormwater on site. 3 Revised 2/8/16 STORMWATER MANAGEMENT SYSTEM INSPECTION & MAINTENANCE PLAN Porous Pavement Areas Porous pavement sections are limited to the rear parking area and the access drive along the Turnpike side of the building. The areas have been designed to accept surface runoff from the pavement areas and to infiltrate all runoff directly into the sandy subsoil. Inspection and Maintenance Plan By implementing the following procedures, C&C Auto Corp. will be able to maintain the functional design of the Stormwater Management System and maximize the system's ability to remove sediment and other contaminants from site generated stormwater runoff. Existing site drain • Inspect the drain inlet regularly to ensure the inlet is clear of any obstructions. • In the event the inlet is obstructed immediately take corrective action to clear the inlet to allow free flow during a rain event Regular maintenance may include flushing the line as needed to keep the line clear Porous Pavement Sections • Routine cleaning is more effective than corrective cleaning • Check for standing water on the surface of the pavement after a precipitation event. If standing water remains within 30 minutes after rainfall had ended, cleaning of porous pavement is recommended. • If cleaning is required, power washing can be an effective tool for cleaning clogged areas. This should occur at mid pressure typically less than 500 psi and at an angle of 30 degrees or less. • Check for debris accumulating on pavement, especially debris buildup in winter. for loose debris, a power/leaf blower or gutter broom can be used to remove leaves and loose debris. • Check for damage to porous pavements. Damaged areas may be repaired by use of infrared heating and rerolling of pavement or the damaged pavement can be cut out and removed and new pavement installed. Standard pavement as repair shall not exceed 15% of the porous pavement total area. • Do not store materials such as sand/salt, mulch, soil, yard waste, and other stock piles on porous surfaces. • Stockpiled snow areas on porous pavements is not recommended and will lead to premature clogging. Pavement Vacuuming 4 Revised 2/8/16 STORMWATER MANAGEMENT SYSTEM INSPECTION & MAINTENANCE PLAN • Vacuum all pavement areas at least twice per year, or more as necessary. Vacuuming should occur at a minimum during spring cleanup following the last snow event and during fall cleanup before the first snow fall event. • Particular care shall be taken at the porous pavement sections. Litter/Trash Removal Routinely inspect dumpster location for spillage and clean as necessary Routinely patrol site for litter pick up De-icing Agents • Use sand as primary agent for parking lot safety during ice and snow conditions NOTE: limit the use of sand to the standard pavement areas `only" as much as practicable. ■ Minimize the use of salt (sodium chloride) during the winter. ■ Use salt only for ice management. ■ Use de-icing or anti-caking agents, added to enhance performance and application characteristics of sand mixtures, only as necessary and at minimum application rates Roof Drain System ■ The roof drain directs roof runoff to the infiltration basin at the rear of the building (Berry Street side). Inspect the leaching basin a minimum of twice a year and remove detritus and floatable products. Infiltration Basin ■ Inspect basin once every year (spring is recommended) and remove accumulated sediment and trash ■ Inspection of infiltration components at least twice annually, and following any rainfall event exceeding 2.5 inches in a 24 hour period, with maintenance or rehabilitation conducted as warranted by such inspection • If an infiltration system does not drain within 72-hours following a rainfall event, then a qualified professional should assess the condition of the facility to determine measures required to restore infiltration function, including but not limited to removal of accumulated sediments or reconstruction of the infiltration basin. Annual Report Prepare an annual Inspection & Maintenance Report at the end of each year. The report should include a summary of the system's maintenance requirements and repairs; and copies of the Inspection & Maintenance Log Sheets. This Annual Report should be kept on site and be submitted to the North Andover Engineering Department upon request. Inspection & Maintenance ChecklistlLo S Revised 2/8/16 STORMWATER MANAGEMENT SYSTEM INSPECTION & MAINTENANCE PLAN The following pages contain an Inspection & Maintenance Checklist and a blank copy of the Stormwater Management System's Inspection & Maintenance Log. These forms are provided to assist C&C Auto Corp. with the inspection and maintenance of the aforementioned Stormwater Management System. 6 Revised 2/8/16 Stormwater Management System Inspection/Maintenance Checklist Minimum Inspection SMP 1 System Gomponerit Frequency Minimum Inspection Requirements Maintenance .Cleanou. Threshold NIA NIA Pavement Sweeping twice (2)times per year AprillNovember (minimum) Porous Pavement On going and during monitor for standing water if draining poorly pressure rainfall events wash and vacuum Pavement condition Routinely evidence of deterioration repair as needed SaltlDeicing periodic during winter months visual inspection Remove any piles of salt Debris Cleanup Routinely visual inspection Clean as required Adjacent vegetated areas Routinel visual inspection for erosion run-on to resestablish turf as needed porous pavement Litter/Trash Removal Routinely Ins ect dumpsters, perimeter of parking areas Clean as required fors ills e. Infiltration Basin Stone Placement Onetime per year Inspect for stone displacement, clogging, etc Repair as needed Vegetation One time per year Inspect for vegetation Remove any vegetation Roof drains Routinely Check for plugging Clean as required 6"drain line Routinely Check for plugging Clean as required Annual Report, including all Annual Report One time per year Inspection &Maintenance logs Yearly before snowfall each Autumn Stormwater Management System Inspection & Maintenance Lon Bate Cleaninq!Repair Needed Date of performed BMP 1 System Component Inspector Cleaning I lnspected (List Items 1 Comments) By Repair Pavement Porous Pavement Infiltration Basin Litter/Trash Removal Roof drain 6" gain line Annual Report 4 r I ��'�?�� kt;'uy���•�.®�¢ �,,.x is �—L—. R _ �z \ o m o � r � t , I / any /l . ru d I. / �H 0 R�-dy r S F �r o0 m �D mz m �© 1 STORMWATER MAINTBNANCE PLAN oen:rR to r.� v oeh+Rr er.sRn '. 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