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HomeMy WebLinkAbout2020-03-10 Correspondence-Revised Plans, O&M Plan & Illicit Discharge Statement Statement ":I"he. A/1-61"In-Cameron- July 10, 2020 Jean Enright, Planning Director 120 Main Street Borth Andover, MA 01845 Re: Site Plan Review Special Permit— 127 Marblehead Street Owner/Applicant: Cen 1 Reatty Trust Dear Jean: Please find enclosed 2 full size copies of the revised site plans and 2 copies of the revised Operation and Maintenance plan and the Illicit Discharge Statement for the above referenced property. In accordance with the DRAFT Notice of Decision for the Site Plan Review Special Permit dated March 10, 2020 the following revisions have been made to the plan and the Operation and Maintenance plan: • The infiltration trench detail on sheet 2 of 2 has been revised to show 1 1/2. inch to 3 inch diameter crushed stone and now includes a note stating that the infiltration trench shall not be installed until all upgradient contributing areas have been stabilized. • Note 1 has been added to sheet 1 of 2 that states that a construction sequence/schedule shall be provided to the North Andover Planning Department prior to the start of construction. • Sediment controls are now proposed around the site as shown on sheet 1 of 2 and a detail on sheet 2 of 2. Catch basin inlet protection has been added to the plans on sheet 1 of 2 and a detail on sheet 2 of 2. Note 2 has been added to sheet 1 of 2 stating that all erosion controls and catch basin inlet protection shall be installed prior to the start of construction. • Note 4 has been added to sheet 1 of 2 stating that no soil is to be stockpiled on site. • No construction entrance is anticipated. • The Operation and Maintenance (0 & M) Plan has been revised to reflect that sand shall not be used on any porous pavement and or pavers. • A major storm event has been defined in the 0 & M Plan as an event with a minimum of 0.5" of precipitation. • Note 7 has been added to sheet 1 of 2 stating that prior to construction a copy of the 0 & M Plan signed by the owner shall be submitted to the Planning Department. CIVIL. ENGINEERS e LAND SURVEYORS o ENVIRONMENTAL CONSULTANTS • LAND USE. PLANNERS 66 Elm Street, Danvers, MA 01923 978.777.8586 FAX 978.774.3488 Providing Professional Services Since 1978 www.morincameron.com Planning Board July 10, 2020 2 • The Stormwater System Inspection Report form found in the 0 & M Plan has been modified to list the BMPs and other intended inspection items. • Note 8 has been added to sheet 1 of 2 stating that a signed copy of the Illicit Discharge Statement shalt be provided to the Planning Department two weeks prior to the start of any earthwork. Attached is a copy of the unsigned Illicit Discharge Statement. • Note 9 has been added to sheet 1 of 2 that any modifications to the existing sidewalks shalt meet ADA compliance. • The infiltration trench shown on sheet 1 of 2 has been extended the full length of the d riveway. • Note 6 has been added to sheet 1 of 2 that the refuse area shalt be enclosed with a fence. The callout of the"Proposed Refuse Area" on the plan view shown on sheet 1 of 2 has also been revised to reflect that the area will be enclosed with a fence. • General Condition 4 in the 0 & M Plan has been revised to include that after the first year of operation the inspection/maintenance schedule shalt, at a minimum, meet the inspection/maintenance requirements of the MA Stormwater Handbook. If you have any questions please do not hesitate to contact me. Sincerely, THE MORIN-CAMERON GROUP, INC. John M. Morin, PE Principal JMM/kmm Enclosures cc: Cen 1 Realty Trust Z:\Projects\A.B.0.Projects\3750\Engineer\Permits&Decision s\Pta n ning\S it e Plan Special Perfnit\NAPB Ltr Rev Plans.docx Illicit Discharge Compliance Statement I, hereby notify the North Andover Planning Board that I have not witnessed, nor am aware of any existing illicit discharges at the site known as 127 Marblehead Street, North Andover, Massachusetts. I also hereby certify that the development of said property as illustrated on the final plans entitled "Site Plan For 127 Marblehead Street In North Andover, Massachusetts prepared by Christiansen & Sergi A Division Of The Morin-Cameron Group, Inc dated March 11, 2019 and as revised to July 10, 2020 will not create any new illicit discharges. There is no warranty implied regarding future illicit discharges that may occur as a result of improper construction or maintenance of the stormwater management system or unforeseen accidents. Name: Company: Title: Signature: Date: Stormwater Best Management Practices Operation and Maintenance Plan for 127 Marblehead Street North Andover Massachusetts Revised: 7/10/2020 The following operation and maintenance plan has been prepared as a guidance document for the efficient implementation,operation and maintenance of the on-site stormwater management systems. The following procedures shall be implemented to ensure success of the Stormwater Management Plan: 1. The contractor shall comply with the details of construction of the site as shown on the approved plans. 2. Effective erosion control measurers during and after construction shall be maintained until a stable turf is established on all altered areas. Basic Information Stormwater Management System Owner: Cen 1 Realty Trust (or current owners) 127 Marblehead street North Andover, MA 01845 North Andover Engineering: Town Engineer Engineering Department 384 Osgood Street North Andover, MA 01845 P: (978) 685-0950 North Andover Planning Board: Town hall 120 Main Street North Andover, MA 01845 P: (978) 688-9535 General Conditions 1. The developer shall be responsible for scheduling regular inspections and maintenance of the stormwater BMP's until the project has been completed. The BMP maintenance shall be conducted as detailed in the following long-term pollution prevention plan and illustrated on the approved design plans: 2. All Stormwater BMP's shall be operated and maintained in accordance with the design plans and the following Long-Term Pollution Prevention Plan. 3. The owner shalt• a. Maintain an Operation and Maintenance Log (see Attachment A) for the last three years. The Log shall include all BMP inspections, repairs, replacement activities and disposal activities (disposal material and disposal location shall be included in the Log); b. Make the log available to the North Andover Engineering Division and Planning Board upon request; c. Allow members and agents of the North Andover Engineering Division and Planning Board to enter the premises and ensure that the Owner has complied with the Operation and Maintenance Plan requirements for each BMP. a. A recommended inspection and maintenance schedule is outlined below based on statewide averages. This inspection and maintenance schedule shall be adhered to at a minimum for the first year of service of all BMP's referenced in this document. After the first year, the inspection/maintenance schedule shall at minimum meet the inspection/maintenance requirements of the Massachusetts stormwater handbook for the respective BMP's installed and at a minimum all BMP's shall be inspected at least once annually and the inspections documented compliance. Long-Term Pollution Prevention Plan (LTPPP) Paved Areas: Sweepers shall sweep paved areas periodically during dry weather to remove excess sediments and to reduce the amount of sediments that the drainage system shall have to remove from the runoff. The sweeping shall be conducted primarily between March 151h and November 15th. Special attention should be made to sweeping paved surfaces in March and April before spring rains wash residual sand into the drainage system. The frequency of sweeping shall average: • Monthly if by a high-efficiency vacuum sweeper • Bi-weekly if by a regenerative air sweeper • Weekly if by a mechanical sweeper Cost: $100-$150 per sweeping Salt used for de-icing on the roadway during winter months shall be limited as much as possible as this will reduce the need for removal and treatment. Sand containing the minimum amount of calcium chloride (or approved equivalent) needed for handling may be applied as part of the routine winter maintenance activities. Porous Pavement: Porous Pavement shall be monitored to ensure that the paving surface drains properly after storms as needed. Porous asphalts and concretes shall be cleaned as needed using a power washer to dislodge trapped particles and then vacuum swept to remove particles. Sand is not to be used on any porus pavement and or pavers. Inspections of surface deterioration shall be completed annually. Cost: $700 - $1,000 Infiltration Trench Infiltration trenches shall be inspected, and debris removed every six months and after every major storm event (an event with a minimum of 0.5" of precipitation). Sediment shall also be removed from pretreatment BMPs every six months or after every major storm event. Cost: $200 Debris& Litter: All debris and litter shall be removed from the roadway and parking lots as necessary to prevent migration into the drainage system. Pesticides, Herbicides, and Fertilizers: Pesticides and herbicides shalt be used sparingly. Fertilizers shall be restricted to the use of organic fertilizers only. All fertilizers, herbicides, pesticides, sand and salt for deicing and the like shall be stored in dry area that is protected from weather. Cost: Included in the routine landscaping maintenance schedule. The Owner shall consult local Landscaping contractors for details. Public Safety Concerns: Chemicals shall be stored in a secure area to prevent children from obtaining access to them. Any major spills shall be reported to municipal officials. i Prevention of Illicit Discharges: Illicit discharges to the stormwater management system are not allowed. Illicit discharges are discharges that are not comprised entirely of stormwater. Pursuant to Mass DEP Stormwater Standards the following activities or facilities are not considered illicit discharges:firefighting,water line flushing, landscape irrigation, uncontaminated groundwater, potable water sources, foundation drains, air conditioning condensation,footing drains, individual resident car washing,flows from riparian habitats and wetlands, water used for street washing and water used to clean residential building without detergents. To prevent illicit discharges to the stormwater management system the following policies should be implemented: 1. Provisions For Storing Materials And Waste Products Inside Or Under Cover 2. Vehicle Maintenance And Washing Controls 3. Requirements for Routine Inspections of the Stormwater Management System (i.e.: catch basins, proprietary treatment unit &subsurface infiltration system.) 4. Spill Prevention and Response Plans. Stormwater System Inspection Report General Information Location: 127 Marblehead Street,North Andover,MA Date of Inspection Start/End Time Inspector's Name(s) Inspector's Title(s) Inspector's Contact Information Purpose of Inspection Site-Specific Stormwater Devices Installed and. Date for Corrective Operating Action/Responsible Description Properly? Corrective Action Needed Person I Paved Area ❑Yes ❑No ❑Yes ©No ❑Yes ❑No 2 Porous Pavement ❑Yes ❑No ❑Yes ❑No ❑Yes ❑No 3 Infiltration Trench ❑Yes ❑No ❑Yes ❑No ❑Yes ❑No Certification Statement: "I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system,or those persons directly responsible for gathering the information,the information submitted is,to the best of my knowledge and belief,true, accurate,and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." Print name: Signature: Date: