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HomeMy WebLinkAbout2013-09-17 Planning Board Supplemental Materials (122) INSPECTION AND MAINTENANCE PLAN STORMWATER MANAGEMENT SYSTEM BUTCHER BOY MARKETPLACE 1077 OSGOOD STREET NORTH ANDOVER, MASSACHUSETTS Prepared for: Angus Realty Corporation 1077 Osgood Street North Andover, Massachusetts 01845 Prepared by: Lynnfield Engineering, Inc. 199 Newbury Street Suite 115 Danvers, Massachusetts 01923 September 16, 2013 -i- K:\480-60\Reports\091613_I&M Plan\toc.doc TABLE OF CONTENTS SECTION 1: GENERAL 1 1.1 General 1.2 Inspections and Maintenance of Stormwater BMPs 1 2 TABLES 1 Operation and Maintenance Budget FIGURES BMP Overall BMP Plan ATTACHMENTS 1 Stormwater Inspection Report Form and Site Inspection Checklist 2 Contech StormFilter Inspection and Maintenance Procedure Stormwater Chambers Operation and Maintenance Guidelines StormTech Chamber System Maintenance Guidelines StormTech Isolator Row Operations and Maintenance Manual APPENDICES A Emergency Response Plan -ii- K:\480-60\Reports\091613_I&M Plan\toc.doc This page has intentionally been left blank. -1- K:\480-60\Reports\091613_I&M Plan\txt.doc SECTION 1 PROJECT DESCRIPTION 1.1. GENERAL The Butcher Boy Marketplace site consists of an approximate nine acre parcel of land. The parcel is zoned General Business District per the Zoning Bylaw Town of North Andover last amended May 2004. The site is bound northerly by residential property; easterly by underdeveloped woodlands, and a residential home; southerly by Great Pond Road (State Route 133), and Lake Cochichewick; and, westerly by Osgood Street (State Route 125). The site is occupied by Butcher Boy Marketplace, a retail mall, and associated parking lot areas. The site is located within the Zone A to the Town’s Public Water Supply Lake Cochichewick. The Owner will be responsible for maintenance and implementation of this Inspection and Maintenance Plan. This Inspection and Maintenance Plan will be implemented for the entire Butcher Boy Marketplace Property. This Plan has been prepared to present Inspection and Maintenance measures to be implemented at the site to minimize potential impacts to the public water supply. An Emergency Response Plan has been prepared to handle potential releases at the site. A copy of the plan is presented in Appendix A. Figure No. 1 presents a plan of stormwater management system’s Best Management Practices (BMPs). Owner Angus Realty Corporation 1077 Osgood Street North Andover, MA 01845 Telephone: 978.688.1511 Facility Contact (Site Operation and Maintenance) Alan Yameen Angus Realty Corporation 1077 Osgood Street North Andover, MA 01845 Telephone: 978.688.1511 Engineer Richard Barthelmes, P.E. Lynnfield Engineering, Inc. 199 Newbury Street Suite 115 Danvers, MA 01923 Telephone: 978.777.7250 -1- K:\480-60\Reports\091613_I&M Plan\txt.doc SECTION 1 PROJECT DESCRIPTION 1.1. GENERAL The Butcher Boy Marketplace site consists of an approximate nine acre parcel of land. The parcel is zoned General Business District per the Zoning Bylaw Town of North Andover last amended May 2004. The site is bound northerly by residential property; easterly by underdeveloped woodlands, and a residential home; southerly by Great Pond Road (State Route 133), and Lake Cochichewick; and, westerly by Osgood Street (State Route 125). The site is occupied by Butcher Boy Marketplace, a retail mall, and associated parking lot areas. The site is located within the Zone A to the Town’s Public Water Supply Lake Cochichewick. The Owner will be responsible for maintenance and implementation of this Inspection and Maintenance Plan. This Inspection and Maintenance Plan will be implemented for the entire Butcher Boy Marketplace Property. This Plan has been prepared to present Inspection and Maintenance measures to be implemented at the site to minimize potential impacts to the public water supply. An Emergency Response Plan has been prepared to handle potential releases at the site. A copy of the plan is presented in Appendix A. Figure No. 1 presents a plan of stormwater management system’s Best Management Practices (BMPs). Owner Angus Realty Corporation 1077 Osgood Street North Andover, MA 01845 Telephone: 978.688.1511 Facility Contact (Site Operation and Maintenance) Alan Yameen Angus Realty Corporation 1077 Osgood Street North Andover, MA 01845 Telephone: 978.688.1511 Engineer Richard Barthelmes, P.E. Lynnfield Engineering, Inc. 199 Newbury Street Suite 115 Danvers, MA 01923 Telephone: 978.777.7250 -2- K:\480-60\Reports\091613_I&M Plan\txt.doc 1.2 INSPECTIONS AND MAINTENANCE OF STORMWATER BMPS Catch basins Catchbasins shall be inspected four times per year for the first year. If the depth of sediment is not greater than two feet during the first year of inspection then the inspections shall be performed once per year. The catch basins shall be cleaned once the depth of sediment reaches two feet which is one half the sump depths or at a minimum annually. Vacuum trucks are preferred due to their effectiveness and they are less likely to damage the oil/grease hood. Cleaning will be completed at a minimum annually. Hydrodynamic Separator Units Units shall be inspected four times per year for the first year. After the first year the unit needs to be inspected once per year. Inspections should be performed with a “sludge judge” to measure the oil depth, if any, and the sediment depth. Cleaning is required when the sediment depth reaches 75% of the storage capacity of the unit or at a minimum annually. Cleaning must be performed with a vacuum truck. Attachment No. 2 presents the manufacturer inspection/maintenance guide for the units. Detention System The detention system shall be inspected four times per year for the first year. After the first year, the units shall be inspected annually. The detention system is equipped with inspection ports or manholes to visibly observe the bottom of the system. Visible observations shall be made of the bottom of bed for ponding water, debris or sediment, inspection of the inlet and outlet to ensure they are free from debris and sediment and that there are no other obstructions; inspection of the structural integrity of the units from above ground settlement or by observations from the ports/manholes. If the depth of sediment observed exceeds 3”, the affected chamber should be cleaned with high pressure water in accordance with the manufacturer’s maintenance guidelines. Maintenance shall be completed at a minimum annually. A copy of the manufacturer’s Operation and Maintenance Guidelines is presented in Attachment No. 2. Roof Dry Well The dry well system shall be inspected four times per year for the first year. After the first year, the dry wells shall be inspected annually. The dry well is equipped with inspection ports or manholes to visibly observe the bottom of the system. Visible observations shall be made of the bottom of bed for ponding water, debris or sediment; and inspection of the structural integrity of the units from above ground settlement or by observations from the ports/manholes. If the depth of sediment observed exceeds 3”, the affected dry well should be cleaned with high pressure water in accordance with the manufacturer’s maintenance guidelines. Maintenance shall be completed in accordance with the manufacturer’s suggested maintenance schedule or at a minimum annually. A copy of the manufacturer’s Operation and Maintenance Guidelines is presented in Attachment No. 2. Infiltration System The infiltration system shall be inspected four times per year for the first year. After the first year, the units shall be inspected annually. The infiltration system is equipped with inspection ports or manholes to visibly observe the bottom of the system. Visible -2- K:\480-60\Reports\091613_I&M Plan\txt.doc 1.2 INSPECTIONS AND MAINTENANCE OF STORMWATER BMPS Catch basins Catchbasins shall be inspected four times per year for the first year. If the depth of sediment is not greater than two feet during the first year of inspection then the inspections shall be performed once per year. The catch basins shall be cleaned once the depth of sediment reaches two feet which is one half the sump depths or at a minimum annually. Vacuum trucks are preferred due to their effectiveness and they are less likely to damage the oil/grease hood. Cleaning will be completed at a minimum annually. Hydrodynamic Separator Units Units shall be inspected four times per year for the first year. After the first year the unit needs to be inspected once per year. Inspections should be performed with a “sludge judge” to measure the oil depth, if any, and the sediment depth. Cleaning is required when the sediment depth reaches 75% of the storage capacity of the unit or at a minimum annually. Cleaning must be performed with a vacuum truck. Attachment No. 2 presents the manufacturer inspection/maintenance guide for the units. Detention System The detention system shall be inspected four times per year for the first year. After the first year, the units shall be inspected annually. The detention system is equipped with inspection ports or manholes to visibly observe the bottom of the system. Visible observations shall be made of the bottom of bed for ponding water, debris or sediment, inspection of the inlet and outlet to ensure they are free from debris and sediment and that there are no other obstructions; inspection of the structural integrity of the units from above ground settlement or by observations from the ports/manholes. If the depth of sediment observed exceeds 3”, the affected chamber should be cleaned with high pressure water in accordance with the manufacturer’s maintenance guidelines. Maintenance shall be completed at a minimum annually. A copy of the manufacturer’s Operation and Maintenance Guidelines is presented in Attachment No. 2. Roof Dry Well The dry well system shall be inspected four times per year for the first year. After the first year, the dry wells shall be inspected annually. The dry well is equipped with inspection ports or manholes to visibly observe the bottom of the system. Visible observations shall be made of the bottom of bed for ponding water, debris or sediment; and inspection of the structural integrity of the units from above ground settlement or by observations from the ports/manholes. If the depth of sediment observed exceeds 3”, the affected dry well should be cleaned with high pressure water in accordance with the manufacturer’s maintenance guidelines. Maintenance shall be completed in accordance with the manufacturer’s suggested maintenance schedule or at a minimum annually. A copy of the manufacturer’s Operation and Maintenance Guidelines is presented in Attachment No. 2. Infiltration System The infiltration system shall be inspected four times per year for the first year. After the first year, the units shall be inspected annually. The infiltration system is equipped with inspection ports or manholes to visibly observe the bottom of the system. Visible -3- K:\480-60\Reports\091613_I&M Plan\txt.doc observations shall be made of the bottom of bed for ponding water, debris or sediment, inspection of the inlet and outlet to ensure they are free from debris and sediment and that there are no other obstructions; inspection of the structural integrity of the units from above ground settlement or by observations from the ports/manholes. If the depth of sediment observed exceeds 3”, the affected area should be cleaned with high pressure water in accordance with the manufacturer’s maintenance guidelines. Maintenance shall be completed at a minimum annually. A copy of the manufacturer’s Operation and Maintenance Guidelines is presented in Attachment No. 2. Storm Filter Stormwater filter system shall be inspected four times per year for the first year. After the first year, the filter shall be inspected annually. Visible observations shall be made of the filter for plugging. Based on the visible inspection, maintenance of the filter will be completed if any of the following conditions are observed: >4” accumulated on the vault floor; >¼” sediment accumulated on top of the filter cartridge; plugged filter media; and/or bypassing of the filter is occurring. StormFilter cartridges should be changed a minimum of once every three years or more frequently if above specified thresholds are met. At least one inspection per year shall be completed during wet weather to observe flow through the StormFilter. StormFilter maintenance shall be completed by qualified contractors trained in confined space entry. A copy of the manufacturer’s Operation and Maintenance Guidelines is presented in Attachment No. 2, Inspection and Maintenance Procedures. Isolator Row Units shall be inspected four times per year for the first year. After the first year the unit needs to be inspected once per year. Cleaning is required when a sediment depth of 3” is observed throughout the length of the isolator row of the storage capacity of the unit or at a minimum annually. Cleaning must be performed with a vacuum truck. Attachment No. 2 presents the manufacturer inspection/maintenance guide for the units. Maintenance of Landscaped Areas Landscaped and grass areas immediately adjacent to the proposed parking areas and buildings shall be mowed as required. Grass clippings shall be directed away from the stormwater systems. Fertilizers or pesticides shall not be used with grassed and landscaped areas. Pavement Maintenance Paved areas of the site shall be inspected on a regular basis and cleaned of accumulated sand and debris. At a minimum, paved areas shall be cleaned on an annual basis. Pavement cleaning shall be performed by a qualified contractor and all material removed transported off site for disposal. Paved areas of the site shall be swept on an annual basis. Snow Removal/Storage Snow from the proposed parking lot area will be stockpiled within designated areas or transported offsite by the snow removal contractor. No stockpiling or storage of snow from paved areas of the site is to be performed along Great Pond Road. Deicing chemicals are not to be utilized on the site. In compliance with the existing deed restrictions, pesticides, fertilizers and other chemical shall not be used on the site. -3- K:\480-60\Reports\091613_I&M Plan\txt.doc observations shall be made of the bottom of bed for ponding water, debris or sediment, inspection of the inlet and outlet to ensure they are free from debris and sediment and that there are no other obstructions; inspection of the structural integrity of the units from above ground settlement or by observations from the ports/manholes. If the depth of sediment observed exceeds 3”, the affected area should be cleaned with high pressure water in accordance with the manufacturer’s maintenance guidelines. Maintenance shall be completed at a minimum annually. A copy of the manufacturer’s Operation and Maintenance Guidelines is presented in Attachment No. 2. Storm Filter Stormwater filter system shall be inspected four times per year for the first year. After the first year, the filter shall be inspected annually. Visible observations shall be made of the filter for plugging. Based on the visible inspection, maintenance of the filter will be completed if any of the following conditions are observed: >4” accumulated on the vault floor; >¼” sediment accumulated on top of the filter cartridge; plugged filter media; and/or bypassing of the filter is occurring. StormFilter cartridges should be changed a minimum of once every three years or more frequently if above specified thresholds are met. At least one inspection per year shall be completed during wet weather to observe flow through the StormFilter. StormFilter maintenance shall be completed by qualified contractors trained in confined space entry. A copy of the manufacturer’s Operation and Maintenance Guidelines is presented in Attachment No. 2, Inspection and Maintenance Procedures. Isolator Row Units shall be inspected four times per year for the first year. After the first year the unit needs to be inspected once per year. Cleaning is required when a sediment depth of 3” is observed throughout the length of the isolator row of the storage capacity of the unit or at a minimum annually. Cleaning must be performed with a vacuum truck. Attachment No. 2 presents the manufacturer inspection/maintenance guide for the units. Maintenance of Landscaped Areas Landscaped and grass areas immediately adjacent to the proposed parking areas and buildings shall be mowed as required. Grass clippings shall be directed away from the stormwater systems. Fertilizers or pesticides shall not be used with grassed and landscaped areas. Pavement Maintenance Paved areas of the site shall be inspected on a regular basis and cleaned of accumulated sand and debris. At a minimum, paved areas shall be cleaned on an annual basis. Pavement cleaning shall be performed by a qualified contractor and all material removed transported off site for disposal. Paved areas of the site shall be swept on an annual basis. Snow Removal/Storage Snow from the proposed parking lot area will be stockpiled within designated areas or transported offsite by the snow removal contractor. No stockpiling or storage of snow from paved areas of the site is to be performed along Great Pond Road. Deicing chemicals are not to be utilized on the site. In compliance with the existing deed restrictions, pesticides, fertilizers and other chemical shall not be used on the site. -4- K:\480-60\Reports\091613_I&M Plan\txt.doc Debris and Litter Removal Trash may collect potentially causing clogging of the facilities. All litter and debris should be collected and removed from the site on a regular basis. Vehicle Washing Washing of vehicles is prohibited on the site. Operation and Maintenance Budget Operation and maintenance costs at the site includes third-party inspections, cleaning of catch basins and separator units and sweeping of the parking lot areas, Table No. 1 presents a summary of anticipated costs in the first year of operation following construction of the site. Inspections and cleaning of catch basins and separator units at the site may be reduced to annually based on the findings of the first year inspections completed. K:\480-60\Reports\091613_I&M Plan\Tab 1_O&M Budget.docx TABLE NO. 1 Operation and Maintenance Budget Butcher Boy Marketplace North Andover, MA Quarterly Third Party Inspections(1) $1,200 Annual Parking Lot Sweeping 500 Replacement StormFilter Media Cartridges(2) CDS System Maintenance(2) Detention System Maintenance(2) Quarterly Catch Basin Maintenance(1) 750 1,500 900 2,000 $6,850 10% Contingency 685 Total Estimated Annual Cost $7,535 (1)Inspection and cleaning frequency may be reduced to annually after year one based on the findings of stormwater inspections completed. (2)Souce: Sterling Stormwater Maintenance Services FIGURES