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Home My WebLink About2020-02-25 Decision Correspondence-I NQrtl^ Andover Planning Board s 1NDEPEN DEN1 CONSTRUGTI N1S1 C3RM1 �TER MNI`1 OF Leltfer of Agree, nlea # Project Address Date 505 Sutton Street 04/05/2021 Independent Monitor Name Monitoring Type(s) Ann M. Marton Z Construction © Stormwater Monitor Contact Phone Monitor Email 781-245-2500 (office) 781-249-7777 (cell) lamarton@lecenvironmental.con This Letter of Agreement is between the the above named Independent Monitor and the North Andover Planning Board for monitoring services to be provided at the above mentioned Project Address and in accordance with the conditions and restrictions stated by the Planning Board In it's Decisi n dated February 25, 2020 , a copy of that Decision has been provided to the independent Monitor. tL (Initials of independent Monitor) By initialing, the independent Monitor acknowledges receipt a the Decision and an understanding of the condition slrestrictions set by the North Andover Planning Board. The Independent Monitor also acknowledges and agrees that he/she is providing monitoring services for the benefit of the Town of North Andover and Is not the project owner or applicant, and does not have a financial or personal interest in the project. Further, the Independent Monitor understands that shelhe may not act as the project owner's agent, representative, partner, employee or joint-venturer on this project. The Independent Monitor agrees to immediately report to the North Andover Planning Board, via the Town Planner, any violations of the terms of the Decision listed above, as soon as observed or otherwise become known to the independent Monitor. This report is in addition to regularly scheduled monitoring reports. The independent Monitor understands that the failure to perform under this Letter of Agreement, to the reasonable satisfaction of the North Andover Planning Board, will be grounds for said Independent Monitor to be excluded in this role for any future projects which are within the jurisdiction of the North Andover Planning Board. Ind a n rani r signature] Date 04/05/2021 By signing this Letter of Agreement, I Indicate that i have read and understand the terms included herein. Town Planner [Signature] Date ' 1 I THE MORIN-CAMERON GROUPS INC. 65 Elm Street,Danvers, MA 01923 p 1978.777.8586 www.morineameron.com PROFESSIONAL SERVICES AGREEMENT Date: June 9,2021 ,lob No.: Work ordered By: Name: Sutton Street Redevelopment,LLC Street Address: 231 Sutton Street Phone#: (978)687-6200 Town,State,Zip: North Andover, MA 01845 Email: Project Location: Address: 505 Sutton Street Subdivision Lot#: Town,State,Zip: North Andover, MA 01845 Map/Parcel#: Map 74, Lot 25 Payment Terms: Lump Sum; See below Retainer Due: 00.00 DESCRIPTION OF WORK TO BE PERFORMED: In accordance with Condition No, 52 of the Site Plan Review Notice of Decision dated March 19, 2020 and the Long-Term Stormwater Rest Management Practices Operation and Maintenance Plan('OMP') dated May 16, 2019 and attached hereto,The Morin-Cameron Group, Inc. ('MCG')will provide the following professional civil engineering services: 1. Twice Annually in April and October, MCG shall inspect ail catch basins,CDS Water Quality Units, Subsurface Infiltration and Detention Systems and Stone Infiltration Trenches for compliance with the OMP. MCG shall prepare an inspection report Identifying each structure inspected and the need, if any,for cleaning, maintenance,or repairs, The inspection report shalt be submitted to the owner and Town of North Andover Planning Department, It is assumed that the site will be free of obstructions and that all structures wilt be accessible during the Inspection, Repeat trips resulting from obstructed access or delays resulting from obstructions shall be considered an additional expense. The Client is responsible for engaging the appropriate utility contractor to address maintenance identified during each Inspection, A copy of the receipt shalt be provided to MCG to confirm the work was completed. Final O&M to carry with the title of the property shalt be confirmed by MCG based on final constructed conditions. Inspections shall be i oiced in accordance with the rate schedule.in affe during t alend1yea the inspection, Ba on the 2021 rates, each inspection/rrt will be i r a lum $1,500. MCG will o the Client of rate increases prior commencing t Saco Note: See attache s or rms onditions of this c nt ck an�Iabor rates` MCG: to ` ,L Sutton treet Redevelopment,LL by AndoverDate: 09-20 11 Date: bTanagcmcnt,Inc„Manager Loui P.Mlnin�cc TuE MORIN-CAMERON GROUP, INC. 66 Elm Street,Danvers,MA 01923 p 1978.777.8586 www.morineameron.com Professlonat Services Terms and Conditions The Morin-Cameron Group,inc.(MCG)shalt perform the services outlined in this agreement for the stated fee arrangement. ACCeSS TO SITE: Unless otherwise stated,MCG will have access to the site for activities necessary for the performance of the services. MCG Witt take reasonable precautions to minimize damage due to these activities but has not included in the fee the cost of restoration of any resulting damage. FEE: The total fee,except stated lump sum,shalt be understood to be an estimate,based upon Scope of Services,and shalt not be exceeded by more than twenty percent,without written approval of the Client. Where the fee arrangement is to be on an hourly basis,the rates shall be those that prevail at the time services are rendered. BILLINGS/PAYMENTS: Invoices for services and reimbursable expenses shall be submitted,at MCG's option, either upon completion of the services or on a monthly basis. Invoices shall be payable within 30 days after the invoice date.A service charge of 1.S%(or the legal rate)per month will be applied to the unpaid balance after 60 days. In addition,if payment is not received within 60 days,MCG has the right to stop work, and the client shall Indemnify and hold harmless MCG against all damages resulting from such stoppage.The Client agrees to pay all costs of collection attributed to late payment,Including reasonable attorneys'fees. Retainers shall be distributed on each invoice based on the estimated percentage of each scope of services item completed. HIDDEN CONDITIONS AND HAZARDOUS MATERIALS: A condition Is hidden if concealed by existing finishes or is not capable of investigation by reasonable visual observation, If MCG has reason to believe that such a condition may exist,the Client shall authorize and pay for all costs associated with the investigation of such a condition. If(1)the Client falls to authorize such investigation after due notification;or(2)if MCG has no reason to believe that such a condition exists,then MCG shall not be responsible for the existing condition nor any resulting damages to persons or property.MCG shall have no responsibility for the discovery,presence,handling,removal,disposal or exposure of persons to hazardous materials of any form. INDEMNIFICATION: MCG and the Client mutually agree;to the fullest extent permitted by law,to Indemnify and hold each other harmless from any and all damage,liability or cost(including reasonable attorneys'fees and defense costs)to the extent caused by their own negligent acts, errors or omissions and those of anyone for whom they are legally liable,and arising from the project that is the subject of this agreement, Neither party is obligated to Indemnify the other in any manner whatsoever for the other's own negligence. RISK ALLOCATION: In recognition of the relative risks and benefits of the project to both the Client and MCG,the Client agrees,to the fullest extent permitted by law,to limit MCG's total liability to the Client,for any and all damages or claim expenses(including attorneys'fees)arising out of this agreement, from any and sit causes,to the total amount of MCG's fee or other amount agreed upon when added under Special Conditions. TERMINATION OF SERVICES: This agreement may be terminated upon 10 days written notice by either party should the other fait to perform their obligations hereunder. In the event of termination,the Client shalt pay MCG for all services, rendered to the date of termination, all reimbursable expenses,and reasonable termination expenses. OWNERSHIP OF DOCUMENTS: All documents produced by MCG under this agreement,either original or digital,shalt remain the property of MCG and may not be used by this Client for any other purpose without the written consent of MCG. Client agrees to indemnify and hold harmless MCG from any claims that arise due to the reuse,misuse or alterations of the work documents. DISPUTE RESOLUTION: Any claim or dispute between the Client and MCG shalt be submitted to non-binding mediation,subject to the parties agreeing to a mediator(s). Unless otherwise specified,this agreement shall be governed by the laws of the principal place of business of MCG. NOTICE OF IMPORTANT RIGHTS: Under the Federal Fair Debt Collection Practices Att,you are required to be given the following notices:(1) unless you dispute the validity of this debt or any portion of it within thirty days after receipt of this notice,the debt will be assumed to be valid by us;(2)if you notify us In writing within this thirty-day period that the debt or any portion of It is disputed,we will mall a copy of verification of debt to you and (3)upon your written request within this thirty-day period,we will provide you with confirmation that this office is the originat creditor. If you request proof of the amount you owe,within the thlrtyday period that begins with the receipt of this letter,we will suspend our efforts to collect the debt until the requested Information is mailed to you. THE MORIN-CAMERON GROUP, INC. 66 Elm Street,Danvers, MA 01923 p 1978.777.8586 www.morincameron.com 021 RATE SCHEDULE HOURLY FEE SCHEDULE FOR PROFESSIONAL SERVICES Principal.................................................................................................................................$225 Engineering or Surveying Director......•..•......•.........:..............................................$175 Engineering or Surveying Manager...............•........................................................$150 Professional Engineer/Professional Land Surveyor.....................................$135 ProjectEngineer..................•.......................................................................•.................,,...$110-$125 ProjectSurveyor................................................................................................................$1004125 Engineering Design Technician.................................................................................$85-$105 SurveyingTechnician....•.................................................................................................$65-$95 braftsperson.........................................................................................................................$65-$95 SurveyCrew, Robotic Assistance...............................................................................$135 SurveyCrew,Two-Man...................................................................................................$145 SurveyCrew,Three-Man.................................................•....,..........,..............................$165 Surveyor,GPS......................................................................................................................$175 SurveyCrew,GPS..............................................................................................................$190 Soli Testing(Licensed Soil Evaluator).................................... $100 SoilTesting (Assistant)...................................................................................................$65 PermittingCoordinator..................................................................................................$100 AdministrativeSupport...........................•..•...................................................................$65 OTHER SERVICES Public Meeting(Engineer, 3-hour min.charge)................................................$525/mtg. Other Meeting (Engineer,2-hour min.charge).................................................$350/mtg. Environmental Monitoring, each Inspection......................................................$150 LS SINGLE-FAMILY DWELLING Certified Foundation Plan....,... ...........................................................................$600 LS Septic System Inspections,each inspection........................................................$150 LS { Septic System As-Built Plan.........................................................................................Time and Material($900 min.) Conservation Commission As-Built Plan............ . ........................... .......—Time and Material Stake Dwelling w/offsets&Set Elevation Benchmark..................................$600 LS Stake Septic System&Set Elevation Benchmark.............................................$450 LS Staketot.........................................p.................................................................................Time and Material Stake miscellaneous.........................................................................................................Time and Materia! REIMBURSABLE EXPENSES Printing (24 x 36 plan black&white)....................................................................$3.50/print Printing(24 x 36 plan color).......................................................................................$5/print Printing(22 x 34 plan black&white)....................................................................$3/print Printing (18 x 24 plan black&white)...................................................................$3/print Photocopy Printing (8.5 x 11 black&white)...............................I....................$0.25/page Photocopy Printing(8.5 x 11 color)......................................................................$0.50/page Photocopy Printing(11 x 17 black&white)......................................................$0,35/page Photocopy Printing(11 x 17 color).........................................................................$0.75/page Regular Presentation Board (24 x 36)....................................................................$10/print High Gloss Presentation Board(24 x 36)..............................................................$25/print MylarPlans............................................................................................................................$15/print Mileage....................................................................................................................................$0.56/mile F.IKATHYM\,PROPOSAt.SlProfessionat 5er Aces Agreement-SOS Sutton St N Andover.donc Long Term Stormwater Best Management Practices Operation and Maintenance Plan for 505 Sutton Street North Andover, Massachusetts Issued May 16, 2019 The following operation and maintenance plan has been Provided to satisfy the requirements of Standard 9 of the Mass DEP Stormwater Management Handbook associated with development of the site and associated Infrastructure. The success of the Stormwater Management Plan depends on the proper implementation, operation and maintenance of several management components. 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. The catch basins, area drains, sediment forebays, subsurface infiltration and detention systems and Contech CDS water quality units shall be inspected and maintained as indicated below. 3. Effective erosion control measurers during and after construction shall be maintained until a stable turf is established on all altered areas. 4. A Stormwater Management Maintenance Log is included at the end of this Appendix. Basic InforInatton Stormwater Management System Owner: Sutton Street Redevelopment,LLC 231 Sutton Street North Andover, MA 01845 P:(978)687-6200 North Andover Engineering Department: 231 Osgood Street North Andover, MA 01845 P:(978)688-9573 North Andover Planning Board: Town Hail 120 Main Street Borth Andover,MA 01845 P:(978)688-9535 1 i ,Cirosion and Sedimentation Controls durLng Constructio The site and drainage construction contractor shall be responsible for maintaining the Stormwater system during construction. Routine maintenance of all items shalt be performed to ensure adequate runoff and pollution control during construction. i A proposed silt fence will be placed as shown on the Grading Plan prior to the commencement of any clearing, grubbing, and earth removal or construction activity. The integrity of the erosion control 1 barrier will be maintained by periodic inspection and replacement as necessary. The erosion control barrier will remain in place until the first course of pavement has been placed and all side slopes have been foamed and seeded and vegetation has been established. A slit sack will also be placed over the new catch basins once constructed. Operations and maintenance plans for the Stormwater Management construction phase and long term operation of the system have been attached to this report, General Conditions 1. The developer shall be responsible for scheduling regular inspections and maintenance of the stormwater BMP's until such time as the subdivision is accepted by the Town of North Andover at which time the Town shalt become the responsible party. The BMP maintenance shalt be conducted as detailed in the following long-term pollution prevention plan and illustrated on the approved design plans. "Multifamily Site Development Plans in North Andover, Massachusetts, 505 Sutton Street", prepared by The Morin-Cameron Group, Inc.dated May 16, 2019 as revised and approved by the North Andover Planning Board. 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 for the last three years. The Log shall Include A BMP inspections, repairs, replacement activities and disposal activities (disposal material and disposal location shalt be Included in the Log), b. Make the log available to the North Andover Engineering Department and Planning Board upon request, c. Allow members and agents of the North Andover Engineering Department and Planning Board to enter the premises and ensure that the Owner has compiled with the Operation and Maintenance Plan requirements for each BMP, 4. 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. At the commencement of the first year of service,a more accurate inspection/maintenance schedule shalt be determined based on the level of service for this site. Long-Term Pol€ut€on Prev&ntlon Plan lTPPP VegetaLed Areas: Immediately after construction, monitoring of the erosion control systems shall occur until establishment of natural vegetation. Afterwards, vegetated areas shall be maintained as such, Vegetation shall be replaced as necessary to ensure proper stabilization of the site. Cost:Included with annual landscaping budget. Consult with local landscape contractors. 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 151h, Special attention should be made to sweeping paved surfaces in March and April before spring rains wash residual sand into the drainage system. Cost: $100-$300 per sweeping Salt used for de-icing on the driveway during winter months shalt 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. Deep Sump Hoo et(Catch Ba;xEns• The Catch basin grates shall be checked quarterly and following heavy rainfalls to verify that the Inlet openings are not clogged by debris. Debris shall be removed from the grates and disposed of properly. Deep sump catch basins shall be inspected twice per year and cleaned as needed when accumulated sediments exceeds 2' from the bottom of the sump (approximately 112 of the sump capacity). Catch basins with hoods shall be Inspected annually to check oil bultd-up and outlet obstructions. Material shalt be removed from catch basins and disposed of in accordance with all applicable regulations Cost: Estimated $50 - $100 per cleaning per catch basin as needed. The Owner shall consult local vacuum cleaning contractors for detailed cost estimates. Public Safety Concerns: Catch basins shall not be left open and unattended at any time during inspection, cleaning or otherwise, Broken or missing grates or frames shall be replaced Immediately. At no time shall any person enter the basin structure unless measures have been taken to ensure safe access in accordance with OSHA enclosed space regulations, CD5 W ter Quatily Units: The CDS Water Quality Units shalt be Inspected after every major storm event for the first 3 months after construction; a major storm event is 3.9 inches of rainfall in a 24-hour period (5 year storm). Thereafter, the system shall be inspected twice per year in April and October. The units shall be cleaned per manufacturers Instructions included herein. Cost: The owner shall consult local landscaping contractor for details. Public Safety Concerns:The manhole covers shall not be left open and unattended at any time during inspection,cleaning or otherwise. Broken covers or frames shall be replaced Immediately, j I ubsurface Infiltration&DgJ ntion System: The subsurface infiltration and detention systems shall be monitored annually to ensure they are draining property. The outlet structure shalt be checked for debris accumulation twice per year,in the spring and fall. In the case that water remains in the detention system for greater than three(3) days after a storm event,an inspection is warranted and maintenance or repairs should be addressed as necessary. Confirm that the low flow outlet in the outlet structure is not obstructed by debris.The inspections shalt be conducted by qualified personnet. Cost:Consult with local landscaping companies for associated costs if necessary. Public Safety Concerns: Manhole covers or inspection port covers shall not be left open and unattended at any time during inspection, cleaning or otherwise. Broken covers or frames shall be replaced immediately. At no time shall any person enter the subsurface structure unless measures have been taken to ensure safe access in accordance with OSHA enclosed space regulations. Stone Infiltration'Treac. es: The stone infiltration trench shall be checked regularly to ensure that the surface Is free of debris such as leaves, sticks and trash. Remove and dispose of any debris. If surface ponding is visible,remove top course of crushed stone and accumulated sediment and replace with clean stone. Material removed from the basin shall be disposed of in accordance with all applicable local,state,and federal regulations, in the case that water remains in the infiltration facilities for greater than three(3)days after a storm event, an inspection is warranted and necessary maintenance or repairs should be addressed as necessary. Cost:$50045,000 per cleaning depending on the volume of material/liquids that need to be removed. Overall SitePradin and Storm ter Managgement, After construction,and during the initial vegetation establishment period,the site should be Inspected after every rainfall. Mowing, litter removal,and spot vegetation repair should be performed on a regular basis. Uebrts&L er: All debris and litter shall be removed from the driveway/parking area as necessary to prevent migration Into the drainage system. es icicles a bicides and Fe i s• Pesticides and herbicides shall be used sparingly. Fertilizers shall be restricted to the use of organic, slow release nitrogen fertilizers only. Alt 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 shalt 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 splits shall be reported to municipal officials. Prevention of Illicit 13 isch r es 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 tine 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, DE chlorinated water from swimming pools,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 (Le.: catch basins,sediment forebays and area drains, CDS water quality units&subsurface Infiltration and detention systems,) 4. Spill Prevention and Response Plans. Stormwater Syste{rl Maintenance Loci 505 Sutton Street North Andover,MA j BMP INSPECTION WORK PATE WORK COMMENTS STRUCTURE DATE PERFORMED PERFORMED I Catch Basin 1 Catch Basin 2 Catch Basin 3 Catch Basin 4 Catch Basin 5 Drain Manhole 1 Drain Manhole 2 Contech CDs i Conlech CDS•2 Cantech CDS-3 Oultel Control Structure 1 Area Drain 1 i Area Drain 2 Area Drain 3 Area Drain 4 i Area Drain 5 Area Drain 6 Area Drain 7 Area Drain 8 Stormwater System Maintenance Lou 505 Sutton Street North Andover,MA amp INSPECTION WORK DATE WORK COMMENTS STRUCTURE DATE PERFORMED PERFORMED Trench Drain 1 Trench Drain 2 Infiltration System 1 Infiltration System 2 tnffiration System 3 Infiitration System 4 Detenllon System I Inrltration Trench Additional Comments: NOTE: All structures to be Inspected at least two tlmes per year.Rotor to OW plan dated 511WI9. I CONTECH ENGINEERED SOLUTIONS CDS® inspection and Maintenance Guide LZ C6 a / �® oil�� 1'J r:± wh1EHi HI! 5 7Utl,tt4u 5 s'rh �s r�r 5 cc rF,.,)4 Maintenance Cleaning The CDS system should be inspected at regular intervals and Cleaning of a CDS systems should be done during dr1weather maintained when necessary to ensure optimum performance. conditions when no flow is entering the system.The use of a The rate at which the system collects pollutants will depend more vacuum truck is generally the most effective and convenient heavily on site activities than the size of the unit.For example, method of removing pollutants from the system.Simply remove unstable soils or heavy winter sanding w€ll cause the grit chamber the manhole covers and insert the vacuum hose Into the sump, to Fill more quickly but regular sweeping of paved surfaces will The system should be completely drained down and the sump slaw accumulation, fully evacuated of sediment.The area outside the sum should also be cleaned out If pollutant build-up exists in this Brea. i115E]�CtlOn In Installations where the risk of petroleum spills is small, liquid Inspection is the key to effective maintenance and is easily contaminants may not accumulate as quickly as sediment. performed. Pollutant transport and deposition.may vary from However,the system should be leaned out Immediately in year to year and regular inspections will help ensure that the the event of an oil or gasoline spill should be cleaned out system is cleaned out at the appropriate time. At a minimum, Immediately.Motor oil and other hydrocarbons that accumulate Inspections should be performed twice per year(e.g.spring on a more routine basis should be removed when an appreciable and fall)however more frequent inspections may be necessary layer has been captured.To remove these pollutants,it may In climates where winter sanding operations may lead to rapid be preferable to use absorbent pads since they are usually less accumulations,or In equipment washdown areas.Installations expensive to dispose than the oil/water emulsion that may be should also be inspected more frequently where.excessive created by vacuuming the oily layer.Trash and debris can be amounts of trash are expected, netted out to separate it from the other pollutants. The screen The visual Inspection should ascertain that the system should be power washed to ensure it is free of trash and debris. components are in working order and that there are no Manhole covers should be securely seated following cleaning blockages or obstructions in the inlet and separation screen, activities to prevent leakage of runoff into the system from above The inspection should also quantify the accumulation of and also to ensure that proper safety precautions have been hydrocarbons,trash,and sediment in the system. Measuring followed.Confined space entry procedures need to be followed pollutant accumulation can be done with a calibrated dipstick, if physical access is required.Disposal of all material removed tape measure or other measuring Instrument.If absorbent from the CDS system should be done in accordance%Ath local material is used for enhanced removal of hydrocarbons,the level regulations.In many jurisdictions,disposal of the sediments may of discoloration of the sorbent material should also be Identified be handled in the same manner as the disposal of sediments during Inspection,it Is useful and often required as part of an removed from catch basins or deep sump manholes. operating permit to keep a record of each Inspection. A simple form for doing so is provided. A , Access to the CDS unit is typically achieved through two manhole ', ` `f% r* rt{ access covers. One opening allows for inspection and cleanout of the separation chamber(cylinder and screen)and isolated sump. The other allows for Inspection and cleanout of sediment `` �• `, _ captured and retalried outside the screen. For deep units,a single manhole access point would allows both sump cleanout , _ = f ti y ts• , ' and access outside the screen. The CDS system should be cleaned when the level of sediment ' has reached 75%of capacity in the isolated sump or when an appreciable level of hydrocarbons and trash has accumulated, If absorbent material is used,it should be replaced when significant discoloration has occurred. Performance will not bey,• impacted until 100%of the sump capacity is exceeded however It Is recommended that the system be cleaned prior to that `!+•_:r Y Y p �n k:.,+r� for easier removal of sediment. The level of sediment is easily rY'• ' ` �yS �T�� y f determined by measuring from finished grade down to the top of the sediment pile. To avoid underestimating the level of sediment in the chamber,the measuring device must be lowered '' to the top of the sediment pile carefully. Particles at the top of '� r the pile typically offer less resistance to the end of the rod than consolidated particles toward the bottom of the pile. Once this measurement is recorded,It should be compared to the as-builts: drawing for the unit to determine weather the height of the :> sediment pile off the bottom of the sump floor exceeds 75%of r ��"•�`'S` ' ;•:: i,- the total height of Isolated sump. L i i ^ate� � ��'r�.�'"„•,,,s �s" �^.:' ' " a.�"��✓i t r s'L.�� w. s x F ,'..,;w �.� �" _. ->� `+�. ;,'-:,� .�:. - �'.>x i ,N,z.7,�✓s. 'w✓�^.Fv�ti �, a � - m � n OWN., y� 5 '�y � '��,��:z:?a�� SAt- i F ,u p�^'9 ,x adv r�`'3��.;r''aH • ••[•]��i. yb�� ' '.�"�` 1 • £:'£--�s�e�� ''„� w r F✓�':��:��"� a '�'-0'.- �,.,,,�"'�.� + w r N� �t "'�r�'S 5� � a�`s3`.f5 .�;�r'v,'�vxr��. � <✓ 0 CDS1SiS 3 0.9 3.0 0.9 0.5 0.4 CDS2015 4 1.2 3.0 0.7 COS2015 5 1.3 3.0 0.9 1.3 1.0 CDS20ZO 5 1.3 3.5 1.1 1.3 1.0 CDS2025 5 1.3 4.0 1.2 13 1.0 CDS3020 6 is 4.0 1.2 2.1 .1.6 CDS3025 6 1.8 4.0 1.2 2.1 1.6 CDS3030 6 1.8 0 1.4 2.1 1.6 i CDS3035 6 1.8 5.0 1.5 2.1 1.6 CDS4030 8 2.4 4.6 1.4 5.6 4.3 CDS4040 8 2.4 5.7 1.7 5.6 4.3 COS4045 8 2.4 6.2 1.9 5.6 4.3 CDS5640 10 3.0 6.3 1.9 8.7 6.7 CD55653 10 1 3.0 7.7 2.3 8.7 6.7 CDS5668 10 3.0 9.3 2.8 CDS5678 t0 3.0 10.3 3.1 8.7 6.7 Table 1:CDS Maintenance Indicators and Sediment Storage Capacities r i COMM' ENGINEERED EOEl TIM 800.925.5140 www.corat"h(kom r CDS Model: Location: Water Floatable Describe Date depth to Layer Maintenance Maintenance sediment' Thickness2 Performer) Personnel Comments i. The water depth to sediment is determined by taking two measurements with a stadia rod:one measurement from the manhole opening to the top of the sediment pile and the other from the manhole opening to the water surface, if the difference between these measurements is less than the values listed In table i the system should be cleaned out. Note:to avoid underestimating the volume of sediment in the chamber, the measuring device must be carefully lowered to the top of the sediment pile, 2. For optimum performance,the system should be cleaned out when the floating hydrocarbon layer accumulates to an appreciable thickness.In the event of an oil spill,the system should be cleaned immedlately. COS WAINance Glide-7110(Per) ' 1 I Lona Term.Stormwater Best Management Practices Operatlon and Maintenance,Plan for 505 Sutton Street North Andover,.Massachusetts Issued May 16, 2019 The following operation and .maintenance plan has been provided to satisfy the requirements of Standard 9 of the .Mass DBP Stormwater Management Handbook associated with development of the site and associated infrastructure. The success of the Stormwater Management Plan depends on the proper implementation, operation and maintenance of several management components. the following procedures shall be implemented to ensure success of the Stormwater Management Plant 1, The contractor shall comply with the details of construction of the site as shown on the approved plans. 2. The catch basins, area drains, sediment forebays, subsurface infiltration and detention systems and Contech CDS water quality units shall be inspected and maintained as indicated below: 3, Effective erosion control rneasurers during and after construction shall be maintained until a.stable turf is established on all altered areas. 4. A Stormwater Management Maintenance Log is included at the end of this Appendix. Basic Information Stormwater Management System Owner: Sutton Street Redevelopment, LLC 231 Sutton Street North Andover, MA 01845 P; (978) 6,87-620.0 North Andover Engineering Department: 231 Osgood Street North Andover, MA 01845 P: (978) 688-9573 North Andover Planning Board: Town Hall 120 Main Street North Andover, MA 01845 P:(978) 688-9535 Erosion and Sedimentation Controls during Construction: The site and drainage construction contractor shall be .responsible for maintatning the stormwater system during constructibrr. Routine maintenance of all items shalLbe performed to ensure adequate runoff and pollution control during construction. A proposed silt fence will be placed as shown on the Grading Plan prior to the commencement of any clearing, grubbing, and earth removal or construction activity. The integrity of the erosion control barrier will be maintained by periodic inspection and replacement as necessary, The erosion control barrier will remain in place untitthe first course of pavement has been placed and all side slopes have been loomed and seeded and vegetation has been established. A silt sack will also be placed over the new catch basins once constructed: Operations and maintenance plans forthe Stormwater Management construction phase and long term operation of the system have been attached to this report. General Conditions 1. The developer shall be responsible for scheduling regular inspections and maintenance of the stormwater BMP s untie such time as the subdivision is accepted by the Town of North Andover at which time the Town shot[ become the responsible party, The BMP maintenance shall be conducted as detailed in the following longterm pollution prevention plan and illustrated on the approved design plans: "Multifamily Site Development Plans in North Andover, Massachusetts, 505 Sutton Street", prepared by The Morin-Cameron Group, Inc..dated May 16, 2019 as revised and approved by the North Andover Planning Board, 2, All Stormwater BMP's shall be operated and maintained in accordance with the design plans and the following Long-Term PollUt'ion Prevention Plan. 3; The owner shall: a. Maintain an Operation and Maintenance Log 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 E ngineering Department and Planning Board upon request; c, Allow members and agents of'the North Andover Bnglneerincq Department and Planning Board to enter the premises and ensure that the Owner has complied with the Operation and Maintenance Plan requirements for each BMP. 4. A recommended inspection and maintenance schedule is outlined below based on statewide averages. This inspection and maintenahce schedule shall be adhered to at a minimum for the first year of service of all BMWs referenced in this document. At the commencement of the first year of service,a more accurate inspection/maintenance schedule shall be determined based on the level of service for this site, 1 Lon -Term Pollution prevention flan LTPPP ,Vegetated Areas: Immediately after construction, monitoring of the erosion control systems shall occur until establishment of natural vegetation. Afterwards, vegetated areas shall be maintained as such, Vegetation shall be replaced as necessary to ensure proper stabilization of the site. Cost: Included with annual landscaping budget. Consult with local landscape contractors. 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 15th 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. Cost: $100-$300 per sweeping Salt used for de-icing on the driveway during winter months shalt be limited as much as possible as this wilt 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. Deep.Sump Hooded Catch Basins: The Catch basin grates shall be checked quarterly and following heavy rainfalls to verify that the inlet openings are not clogged by debris. Debris shalt be removed from the grates and disposed of property. Deep sump catch basins shall be inspected twice per year and cleaned as needed when accumulated sediments exceeds 2' from the bottom of the sump (approximately 1/2 of the sump. capacity). Catch basins with hoods shalt be inspected. annually to check oil build-up and outlet obstructions. Material shalt be removed from catch basins and disposed of in accordance with all applicable regulations Cost:. Estimated $50 - $100 per.cleaning per catch basin as needed. The Owner shall consult.local vacuum cleaning contractors for detailed cost estimates. Public Safety Concerns: Catch basins shall not be left open and unattended at any time during inspection, cleaning or otherwise. Broken or missing grates or frames shall be replaced immediately. At no time-shall any person enter the basin structure unless measures have been taken to ensure safe access in accordance with OSHA enclosed space regulations, CDS Water Quality Units: The CDS Water Quality Units shall be inspected after every major storm event for the first 3 months after construction, a major storm event is 3.9 inches of rainfall In a 24-hour period (5 year storm). Thereafter, the system shall be inspected twice per year In April and October. The units.shalt be cleaned per manufacturer's.instructions included herein. Cost; The.owner shall consult local Landscaping contractor for.details, Public Safety Concerns:The manhole covers shalt not be left open and unattended at any time during inspection,cleaning or otherwise; Broken covers or frames shalt be replaced immediately. Subsurface Infiltration.;&Detention System The subsurface infiltration acid detention systems shall'be monitored annually to ensure they are draining property, The. outlet structure shall be checked for debris occumulatton'twice per year; in the spring and fall. In the case that water remains in the-detention system for greater than three Q) days after a storm event,an Inspection is warranted and maintenance or repairs�should be addressed as necessary. Confirm that the low flow outlet in the outlet structure is not obstructed by debris..The inspections shalt be conducted by quatified personnel, Cast:Consult with local Landscaping companies for associated costs if necessary. Public :Safety Concerns., Manhole covers or inspection port covers shall not be left open and unattended at any tithe eluting inspection, cleaning or otherwise: Broken covers or frames shall be replaced immediately. At no time shall any person enter the subsurface structure unless measures have been taken to ensure safe access in accordance with OSHA enclosed space regulations. Stone Infiltration Trenches: the stone infiltration trench.shalt be checked regularly to ensure that the surface is:free of debris such as leaves, sticks and trash. Remove and dispose of any debris. If surface pending is visible, remove top course of crushed stone and accumulated sediment and replace with clean stone, Material removed'from the basin shot[be disposed of in accordance with all applicable local,state,and federal regulations. In the case that water remains in the infiltration facilities for greater than three (3) days after a storm event, an inspection is warranted and necessary maintenance or repairs should be addressed as necessary. Cost:.$500-$5,000 per cleaning depending on the volume of material/liquids that need to be removed. Overall.Site Grading and Stormwater Management:' After construction, and during the initial vegetation establishment period,the site should be inspected after every rainfall. Mowing; litter rerhoval,and spot vegetation repair.should be performed on a. regular bases, Debris&Litter: A.11 debris and litter shall be removed from the driveway/parking area 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, slow release nitrogen fertilizers only. All fertilizers, herbicides, pesticides, sand and salt for deicing and the like shalt 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, Prevention of Illicit Dischargesi 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 StormWatet 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 carwashing,flows from riparian habitats I and wetlands, DE chlorinated water from swimming pools, 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, sediment forebays and area drains, CDS water quality units &subsurface infiltration j and detention systems.) 4. Spill Prevention and Response Plans: j Stormwater Systelm Maintenance Loa 505 Sutton Street North Andover,MA BMP INSPECTION WORK DATE WORK, COMMENTS STRUCTURE DATE PERFORMED_ PERFORI Catch Basin 1 Catch Basin 2 Catch Basin 3 Catch Basin 4 Catch Basin 5 Drain Manhole 9 Drain Manhole 2 Cootech CDS i Coniech CDS-2 Contech CDS-3 Outlet Control.Structure 1 Area Efrain 1 Area Drain 2 Area Drain 3 Area Drain 4 Area Drain Area Drain 6 Area Drain 7 Area brain 8 Stnrmwater System Maintenance Loa. 605 Sutton Street North Andover,MA BMP INSPECTION WORK DATE WORT( COMMENTS STRUCTURE DATE PERFORMED PERFORMED Trench Drain 1 Trench Drain 2 Infiltration System 1 Infiltration System 2 Infiltration System 3 Infillrallon System 4 Detent€on System 1 Infiltration Trench Additional Comments. NOTE: All structures to be Inspected at least two times per year,Refer to O&M plan dated 5116119, C N T E C H ENGINEERED SOLUTIONS CDS° Inspection and Maintenance Guide g:? � � �` ,;,,y, � �"` f'��"�.�:N,t,.;�..,.•-kMrt �� fz car'. o� ��.� � ;,'r� "F �s,y'�� .:prc.'".�.�r" r �.c i�.��,�""s�w:�^. Lm a; Mz; nw 11yy �Ii4S4111�1t11 vc�a�owes Maintenance Cleaning The CDS system should be inspected at regular intervals and Cleaning of a CbS systems should be done during.dry weather maintained when necessary to ensure optimum performance, conditions when no flow is entering the system.The,use of a The rate at which the system collects pollutants will depend more vacuum truck is generally the most effective and convenient heavily on site activities than the size of the unit.f`or example, method of removing pollutants from the system.Simply remove unstable-soils or heavy winter sanding will cause the grit chamber the manhole covers and insert the vacuum hose into the sump, to fill more quickly but regular sweeping of paved surfaces will The system should be completely drained down and the sump slow accumulation. fully evacuated of sediment.The area outside the screen should also be cleaned out if pollutant build-up exists in.this area. Inspection In installations where the risk of petroleum spills Is small,liquid Inspection is the key to effective maintenance and is easily contaminants may not accumulate as quickly as.sediment. performed. Pollutant transport and deposition may vary from however,the system should be cleaned out Immediately In year to year and regular inspections will help ensure that the the event of an oil or gasoline spill should be cleaned out system is cleaned out at the appropriate time, At a minimum, immediately.Motor oil and other hydrocarbons that accumulate inspections should be performed twice per year(e.g.spring on a more routine basis should be removed when an appreciable and fall)however more frequent inspections may be necessary layer has been captured,To remove these pollutants,it.may j in climates where winter sanding operations may lead to rapid be preferable to use absorbent pads since they are usually less accumulations,or in.equipment washdown areas.Installations expensive to dispose than the oil/water emulsion that may be should also be inspected more frequently where excessive created by vacuuming tho oily layer.Trash and debris can be amounts of trash are expected. netted out to separate it from the other pollutants.. The screen The visual inspection should ascertain that the system should be power washed.to ensure it Is free of trash and debris. components are in working order and that there are no Manhole covers should be securely seated following cleaning blockages or obstructions in the inlet and separation screen. activities to.prevent leakage of runoff into the system:from above The Inspection should also quantify the accumulation of and also to ensure that proper safety precautions have been hydrocarbons,trash,and,sediment in the system. Measuring followed.Confined space entry procedures need to be followed pollutant accumulation can be done with a calibrated dipstick, if physical access Is required. Disposal of all material removed tape measure or other measuring instrument.If absorbent from the CDS system should be done in accordance with local material is used for enhanced removal of hydrocarbons,the level regulations;in many jurisdictions,disposal of the sediments may of discoloration of the sorbent material should also be identified be handled in the same manner as the disposal of sediments during inspection,It is useful and often required as part of an removed from catch basins or deep sump manholes, operating permit to keep a record of each inspection. A simple form for doing so is provide.d; Access to the CDS unit is typically achieved through two manhole access covers. Otte opening allows for inspection and cleanout of the separation chamber(cylinder and screen)and isolated sump. The other allows for inspection and deanout of sediment captured and retained outside the screen. ror deep units,a single.mahhole access point would allows both sump cleandut and access outside the screen. The CDS system should be cleaned when the level of sediment has reached 75%of.capacity in the isolated sump or when an appreciable level of hydrocarbons and trash has accumulated. If absorbent material is used,it should be replaced when significant discoloration has occurred. Performance will hot be Impacted until 100%.of the sump capacity is exceeded however it is recommended that the system be cleaned prior to that for easier removal of sediment, The level of sediment is easily F determined by measuring from finished grade down to the top of the sediment pile. To avoid underestimating the level of. K sediment in the chamber,the measuring device must be lowered to the top of the sediment pile carefully. Particles at the top of the pile:typically offer less resistance to the end of the rod than consolidated particles.toward the bottom of the pile, Once this . measurement is recorded,it should be compared to the as-built .drawing for the unit to determine weather the height of the sediment pile off the bottom of the sump floor exceeds 75%of i E , the total height of isolated.sump. ' Distance'from Water Surface biameter Sediment Storage Capacify to Top of Sediment Pile° CM Model ft m ft m y3 mElm kk A 1lV► 1 ® 1 1 3 1 ! A : 1 1 ! • r �`( •�\ r �S")�` ..' Ij -!, A vtJ_,.•3rt �4;; r%" r t: C' ; 6�1 'Y�41r`c.` `•7.. 1 � 'a A„ ?K;.__ � f 1 r j �4 f i GA �- i n i1) � _, ��T ��j�s-�� , L � r= � (•�1 1.�,� ` I �1't �lI'J ,9.i tf�t Support • Drawings and specificalions are available at vnvs'ixontechstormrvater.cunr. • Site-spacific design support is available from our engineers, 02047 Contedr Engineered Solutions LLC,a QUIRRETE Company Contech Engineered Solutions LLC provides site solutions for the civil engineering industry.Contech s portfolio includes bridges,dralnoge,5aniory server, slournwater,earth stabilization and l.astewaler trea+neat products.For information,visit wYnv.ContechES.com or caf1800.338.1122 NOJF!ING IN THfS CATALOG SHOULD 13E CONSTRUED AS AN EXPRESSED WARRANTY OR AN IMPLIED WARRANTY OF MERCHANTAWLITY OR FITNESS FOR ANY PARTICULAR PURPOSE,SEE THE COh1TECH STANDARD CONDITION OF SALES(VIMABtE AT 65MNYCgNTF[HfS.COaUC0Si FOR MORE INFORMATION. The product(s)described may he protected by one or more of the foVowing US patents: 5,322,629;5,624,576;5,707,527;5.75R415;5,788.848; 5,985,157;6,027,639;6,350,$74;6,406,218;6,641,720;6,511,595;6,649,048;6,991,114;6,998,038;7,186,058;7,296,692;7,297.266;7,517,450 related foreign patents or other patents pending. i i CDS Inspection �I CD5 Model: . ..... Location; Water F.loattable Describe Maintenance Date depth to Layer Maintenance Comments sediment' Thickness' Performed Personnel. i I E 14 The water depth to sediment is determined by taking two measurements with a stadia rod;one measurement from the manhole opening to the top of the sediment pile and the other from the manhole opening to the water surface, If the difference between these measurements is less than the values listed In table 1 the system should be cleaned out. Note:to avoid underestimating the volume of sediment In the chamber, the measuring device must be carefully lowered to the top of the sedimentplle. 2. For optirnum performance,the system should be cleaned out when the floating hydrocarbon layer accumulates to art appreciable thickness.in the event of an oil spill,the system should be cleaned immediately. CpS.Mairaena=Guide.71181FOFt Lonci Term Stormwater Best Management Practices Operation and Maintenance Plan for 505 Sutton Street North Andover Massachusetts Issued May 16, 2019 Revised'April 28, 2021 The following operation and maintenance plan has been provided to satisfy the requirements of Standard 9 of the Mass DEP Stormwater Management Handbook associated with development of the . site and associated infrastructure. The success of the Stormwater Management Plan depends on the proper implementation, operation and maintenance of several management components. 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 i approved plans. 2. The catch basins, area drains, sediment forebays, subsurface infiltration and detention systems and Contech water duality units shall be inspected and maintained as indicated below. 3. Effective erosion control measurers during and after construction shall be maintained until a stable turf is established on all altered areas. 4. A Stormwater Management Maintenance Log is included at the end of this Appendix. Basic Information Stormwater Management System Owner: Sutton Street Redevelopment, LLC 231 Sutton Street North Andover, MA 01845 P: (978) 687-6200 North Andover Engineering Department: 231 Osgood Street North Andover, MA 01845 P: (978) 688-9573 i� North Andover Planning Board: Town Hall 120 Main Street North Andover, MA 01845 P: (978) 688-9535 Long Term Stormwater Best Management Practices Operation & Maintenance Plan April 28,2021. 505 Sutton Street North Andover, MA Erosion and Sedimentation Controls during Construction: The site and drainage construction contractor shall be responsible for maintaining the stormwater system during construction. Routine maintenance of all items shall be performed to ensure adequate runoff and pollution control during construction. A proposed silt fence will be placed as shown on the Grading Plan prior to the commencement of any clearing, grubbing, and earth removal or construction activity. The integrity of the erosion control barrier will be maintained by periodic inspection and replacement as necessary. The erosion control barrier wilt remain in place until the first course of pavement has been placed and all side slopes have been loamed and seeded and vegetation has been established. A sift sack will also be placed over the new catch basins once constructed. Operations and maintenance plans for the Stormwater Management construction phase and long term operation of the system have been attached to this report. General Conditions 1. The developer shall be responsible for scheduling regular inspections and maintenance of the stormwater BMP's until such time as the subdivision is accepted by the Town of North Andover at which time the Town shall become the responsible party, The BMP maintenance shalt be conducted as detailed in the following long-term pollution prevention plan and illustrated on the approved design plans: "Multifamily Site Development Plans in North Andover, Massachusetts, 505 Sutton Street", prepared by The Morin-Cameron Group, Inc. dated May 16, 2019 as revised and approved by the North Andover Planning Board. 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 shall: a. Maintain an Operation and Maintenance Log for the Last three years. The Log shalt include MI. BMP Lnspections, 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 Department and Planning Board upon request; c. Allow members and agents of the North Andover Engineering Department and Planning Board to enter the premises and ensure that the Owner has complied with the Operation and Maintenance Plan requirements for each BMP. 4. A recommended inspection and maintenance schedule is outlined below based on statewide averages. This inspection and maintenance schedule shad be adhered to at a minimum for the first year of service of alL BMP's referenced in this document. At the commencement of the first year of service, a more accurate inspection/maintenance schedule shall be determined based on the level of service for this site. 2 Long Term Stormwater Best Management Practices Operation & Maintenance Plan April 28, 2021 505 Sutton Street North Andover, MA I Lon -Term Pollution Prevention PLan LTPPP Vegetated Areas: Immediately after construction, monitoring of the erosion control systems shall occur until establishment of natural vegetation. Afterwards, vegetated areas shall be maintained as such. Vegetation shall be replaced as necessary to ensure proper stabilization of the site. Cost: Included with annual landscaping budget. Consult with local landscape contractors. 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. Cost: $250-$500 per sweeping Salt used for de-icing on the driveway 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. Deep_Sump Hooded Catch Basins: The Catch basin grates shall be checked quarterly and following heavy rainfalls to verify that the inlet openings are not clogged by debris. Debris shall be removed from the grates and disposed of properly. Deep sump catch basins shall be inspected twice per year and cleaned as needed when accumulated sediments exceeds 2` from the bottom of the sump (approximately 1/2 of the sump capacity). Catch basins with hoods shalt be inspected annually to check oil build-up and outlet obstructions. Material shall be removed from catch basins and disposed of in accordance with all applicable regulations Cost: Estimated $50 - $100 per cleaning per catch basin as needed. The Owner shall consult local vacuum cleaning contractors for detailed cost estimates. Public Safety Concerns: Catch basins shall not be left open and unattended at any time during inspection, cleaning or otherwise. Broken or missing grates or frames shall be replaced immediately. At no time shall any person enter the basin structure unless measures have been taken to ensure safe access in accordance with OSHA enclosed space regulations. Water Quality Units: All Water Quality Units (e.g. Contech CDS, Stormceptor) shall be inspected after every major storm event for the first 3 months after construction;a major storm event is 3.9 inches of rainfall in a 24-hour period (5 year storm). Thereafter, the system shall be inspected twice per year in April and October. The units shall be cleaned per manufacturer's instructions. Cost: The owner shall consult local landscaping contractor for details. 3 Long Term Stormwater Best Management Practices Operation&Maintenance Plan April 28,2021 505 Sutton Street North Andover, MA Public Safety Concerns:The manhole covers shall not be left open and unattended at any time during inspection, cleaning or otherwise. Broken covers or frames shalt be replaced immediately. Subsurface Infiltration & Detention System: The subsurface infiltration and detention systems shall be monitored annually to ensure they are draining properly. The outlet structure shall be checked for debris accumulation twice per year, in the spring and fail. In the case that water remains in the systems for greater than three (3) days after a storm event, an inspection is warranted and maintenance or repairs should be addressed as necessary. Confirm that the low flow outlet in the outlet structure is not obstructed by debris. The inspections shall be conducted by qualified personnel. Cost: Consult with local landscaping companies for associated costs if necessary. Public Safety Concerns: Manhole covers or inspection port covers shalt not be left open and unattended at any time during inspection, cleaning or otherwise. Broken covers or frames shall be replaced immediately. At no time shall any person enter the subsurface structure unless measures have been taken to ensure safe access in accordance with OSHA enclosed space regulations. Stone Trenches for„Roof Drip Edges: The stone trench shalt be checked regularly to ensure that the surface is free of debris such as leaves, sticks and trash. Remove and dispose of any debris. If surface ponding is visible, remove top course of crushed stone and accumulated sediment and replace with clean stone. Material removed from the basin shall be disposed of in accordance with all applicable local, state, and federal regulations. In the case that water remains in the infiltration facilities for greater than three (3) days after a storm event, an inspection is warranted and necessary maintenance or repairs should be addressed as necessary. Cost: Consult with local landscaping companies for associated costs if necessary. Overall Site Grading and Stormwater Management: After construction, and during the initial vegetation establishment period, the site should be inspected after every rainfall. Mowing, litter removal, and spot vegetation repair should be performed on a regular basis. Debris & Litter: All debris and litter shall be removed from the driveway/parking area as necessary to prevent migration into the drainage system. Pesticides, Herbicides, and Fertilizers: Pesticides and herbicides shall be used sparingly. Fertilizers shall be restricted to the use of organic, slow release nitrogen 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. 4 Long Term Stormwater Best Management Practices Operation& Maintenance Plan April 28,2021 505 Sutton Street North Andover, MA Prevention of Illicit Discharges: Illicit discharges to the stormwater management system are not allowed. Illicit discharges are discharges that are riot 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, DE chlorinated water from swimming pools, water used for street washing and water used to clean residential building without detergents, To prevent illicit discharges to the stormwater management system the fallowing 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 (Le.: catch basins, sediment forebays and area drains, CDS water quality units & subsurface infiltration and detention systems.) 4. Spill Prevention and Response Plans. i i I 5 i Illicit Discharge Compliance Statement 1, Scott.P, Cameron, P.E., 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 505 Sutton Street in North Andover, Massachusetts. I also hereby certify that the development of said property as illustrated on the final plans entitled "Multifamily Site Development Plaits in North Andover, Massachusetts, 505 Sutton Street," prepared by The Morin-Cameron Group, Inc. dated May 16, 2010 and as revised and approved by the North Andover Planning Board and maintenance thereof in accordance with the "Construction Period Pollution Prevention Plan" and "Long-Term Pollution. Prevention Plan" prepared by The Morin-Cameron Group, Inc dated May 16,2019 and as revised and approved by the North Andover Planning Board will not create any new illicit discharges. There is no warranty 1 implied regarding future illicit discharges that may occur as a result of improper construction or maintenance of the Mormwater management system or unforeseen accidents. Name: Scott P. Cameron P.E. Company: The Morin-Cameron Group, Inc. Title: Owner's Representative Signature: Date: 4%ORT71 f' A TOWN OF NORTH ANDOVER OFFICE OF THE TOWN CLERK 120 MAIN STREET NORTH ANDOVER,MASSACHUSETTS 01845 Carta Dawne Warren,CMC Telephone(978)68$-9501 Town Clerk Fax(978)688-9557 E-mail dwarren northandoverma. ©v 1, Carla Dawne Warren, Town Clerk of the Town of North Andover endorse and certify that there are no records filed with the North Andover Town Clerk's office showing that there has been a modification, amendment, rescission or change to the plan endorsed by the North Andover Planning Board on the plan.entitled "Plan of Land in North Andover, Massachusetts, 477 & 505 Sutton Street, signed by Jean Enright, dated July 23, 2019. This certificate is made upon application on this day of July, 2 02 1. A true record ATTEST Carla Dawne Warren Town Clerk I hereby apply, pursuant to Massachusetts General Law- Part I,Title VII, Chapter 41,Section 81X,for a certification that the approval for the plan titled Plan of Land in North Andover Massachusetts 0 477 & 505 Sutton Street dated July 23,2019 and signed by lean Enright on behalf of the North Andover Planning Board on J _30, 2019�, has not been modified, amended or rescinded, nor the plan changed. i — ---- `igned g v Date 7 a2 G Sutton Street Redevelop ent, LLC b4by r Andover Real Property Management Group, Inc., i t,. By Louis P. Minicucci,Jr., President I I I 4 i December 2, 2022 Jean Enright, Planning Director Town of North Andover 120 Main Street North Andover, MA 01845 Re: 505 Sutton Street Apartments .lean: The site lighting, as Installed, meets the minimum IES (Illuminating Engineering Society) standard guidelines, and has been installed per the photometric plan as approved by the North Andover Planning Board. 0. Sincerely, . Michael Radner, ASLA LEED ap . cc: Alex Loth - Minco + Nate Latolals - Pilot Construction Robert Schaefer - R.A. Schaefer & D.M. White Architects Radner Design Associates, Inc. 3 Allied Drive, Suite 303 Dedham, MA 02026 (508)736-6144 www.RadnerDesign.com ti 6/28123, 12:56 PM Town of North Andover Mail-Fwd:FW:Sutton street drainage rework southwest corner NoRT.H . .N.0,0VER Massachusetts Bonnie Wolstromer<bwolstromer@northandoverma.gov> Fwd: FW: Sutton street drainage rework southwest corner 1 message Jean Enright<jenright@northandoverma.gov> Wed, Jun 28, 2023 at 11:32 AM To: Bonnie Wolstromer<bwolstromer@northandoverma.gov> Bonnie, When you have time would you please print this email and the photos and leave them on my desk. Thank you j Jean ---------- Forwarded message--------- From: Alex Loth <ALoth@mincocorp.com> Date:Tue, Jun 27, 2023 at 2:41 PM Subject: FW: Sutton street drainage rework southwest corner To:Andrew Shapiro <ashapiro@northandoverma.gov>, Jean Enright<jenright@northandoverma.gov>, Jim Stanford <jtanford@notthandoverma.gov> Cc: Nate Latiolais <natel@pilotconstructioninc.com>, Patrick Monahan <patrickm@pilotconstructioninc.com>, Scott Cameron (scott@morincameron.com)<scott@morincameron.com>,, Eric Brown <ebrown@morincameron.com>,Ann Marton (amarton@lecenvironmental.com) <amarton@lecenvironmental.com> Good afternoon, Please find attached photos of the work undertaken last week. The entire area was seeded with a shade mix before the erosion control mat went down.The work was performed after a pre-Construction meeting on 6.22.23 with Ann Marton and Scott Cameron to discuss and review the proposed work and their expectations. Ann has confirmed the work appears acceptable. Alex Alexan.dar J. Lotb MINCO 231 Sutton Street Suite 1 B North Andover, MA 01845 (978)687-6200 Office (603)724-7515 Mobile aloth@mincocorp.com Sincerely, Jean Enright j i littps:Hmail.google.cam/mail/u/0/?lk=a2debacbla&view=pt&search=all&permthid=thread-f:1769961034245151977%7Cmsg-f:1769961034245151977,.. 1/3 6128/23, 12:56 PM Town of North Andover Mail-Fwd:FW:Sutton street drainage rework southwest corner Planning Director Town of North Andover 120 Main Street North Andover, MA 01845 Phone 978.688.9533 Fax 978.688.9542 Email: jenright@northandoverma.gov Web: www.NorthAndoverMA.gov acid:imageO01.jpg@010EOF52.F68A5980 7 attachments IMG_0465,jpg 2114K g IMG_0466.jpg 1900K i ...,_ IMG_0463.jpg 2133K i -F IMG_0464.jpg 1822K h ttps:llmall.google.com/mail/u/01?ik=a2debacbl a&view=pt&search-al l&p ermthid=thread-f:1769961034245151977%7Cmsg-f:1769961034245151977... 2/3 e21n2� 3, 9:PM Town of NorihAndover Uw-Fw±Fg Sutton street dwR«rework southwest mr r � ! � � !M G 0 4 2jpg ` 17 9K � 7 � \ \ a |M G_0 4 7dp§ 185]K j ~ \� |M G 046 a]p§ ]7 3 j � «R$m m9ogI eAm iw� 0� i aa+«we Uiew= ea#aRp mmm=r 11769961034ag 51977Z7C_��17memG4e@ yz. 3a1 ) i • i a n��w ��r'�, h• ��':s � � 5 r �� •r�Y s5 a� r a � ',+_ �� ; r r IX i�f� S � � � p•#5a�� s '' =�ir�,�ai t -i{! y j � '�i Rls � ' � 16 �. ya r 1Vw d""�'R} ,. r ik Miry aV rg�l��x� ,�: .• f5 � ti'„ 1 ;r I �a Rm g>, -#', yi, f ''q 'a� ti c , ■■ "�i ,tsty ;, v,lk ,: 7 IVV x � 5 r �� `�r t e • '4 1� r � t' � � d '. ��, ft' � A how. o ii 5 7 rA WIN VN. 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'i11 NA �s—+�+� �?�s 11 �1he,n it , i Y� �. b'k �r 1, f � � 'v' �.4 dry Oro C 4. � rt*� :`} � Fx,�u f �� , � Y , '� !k�• Na��' {y��yiNc �' ;l 4l { f.Ma! 15 �S ''• r Yt ry: as.,�.xi� 4 x c at 7 �yY�J��Z�fy yy �j• � 14 "'b 1 � � %6� ,�� .,��n�r.. -_. � _^ .;»+ � i3�. y � t l �.: ,7�, �g /A al'. OFF 44, �► a ]�'�p�� ,, � 1 a �� a��'"�"'�,�d ,>A - �i�. y� Y��`a��,�i4.� r ate-•v�{r 3r`r a�. �F� 4�. `x1 � Yy i V 5 �je rC �' r e r � *�"5'� ' � r r ar a � •his -_� � �`�^w - a .h, f '1 � t n it r � � - t�� i � 2 f _ ! a .�s �' • v 5� V Sutton Street Redevelopment LLC 231 Sutton Street Suite 113 North Andover, MA 01845 9786-687-6200 Office October 11, 2023 Addendum to the Stormwater Report referenced In the Site Plan Review Decision recorded in the NERD at Book 16233 Page 214. The"Long Term Stormwater Best Management Practices 0&M Plan" section of the above-noted Report Is hereby amended to add the following language to the end of the section titled "Overall Site Grading and Stormwater Management The Swale running generally north-south along the west side of the site, from the southwest corner of the site, terminating at or near a constructed drainage area on the property now or formerly of the own of North Andover,shall be Inspected not less than twice annually, and any Im ediments reed page shag be removed at that time, Sutton Street Redevelopment LLC, by its Manager, Eric B. Loth,Jr. i