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CHAPEL HILL SUBDVISION CONCOM SPECIAL CONDITION i Attachment to Order of Conditions# 64-434 Page lof 6 SPECIAL CONDITIONS SALEM CONSERVATION COMMISSION DEP FILE #64-434 Chapel Hill Sub-Division:located off Clark Ave City of Salem,Massachusetts ADDITIONAL FINDINGS Based on the Estimated Habitats or Rare Wildlife and Certified Vernal Pools Map (June 1, 2003) from Natural Heritage&Endangered Species Program(NHESP) of the Massachusetts Division of Fisheries and Wildlife, it has been determined that this project does not occur near any habitat of state-listed rare wildlife species nor contains any vernal pools. This Order is issued under the Massachusetts Wetlands Protection Act,M.G.L.Chapter 131,Section 40 and the City of Salem Wetlands Protection Ordinance,Salem Code Chapter 34, Section 34-1 —34-13. This Order permits the construction of 4 detention basins located within the buffer zone of bordering vegetated wetlands located off Clark Avenue in Salem, MA. One detention structure, labeled Basin 1, is also located on the site, however it is located outside of the buffer zone of BVW, and therefore is not within the Conservation Commission's jurisdiction. The construction of the detention basins will require grading work and installation of pipes and drainage infrastructure within the buffer to the BVW. The Conservation Commission approves the construction and installation of the basins as shown on the approved plans, including best management practices proposed to treat stormwater before it enters the bordering vegetated wetlands.-and associated resource areas. The details of the approved basins is as follows: Basin 2 is located just outside of the 100 foot buffer zone to BVW,but the outfall pipe and rip rap is located within the 100 foot buffer. Basin 2 contains a rip rap spreader, a sediment forebay, and outlet which connects to a vegetated swale. Basin 2 is approx. 20 feet by 45 feet at the bottom of the basin. Basin 3 is partially in the 100 foot buffer to BVW,contains two rip rap level spreaders, a sediment forebay, and outlet structure which connects to a vegetated swale. Basin 3 is approx. 100 feet by 40 feet at the bottom of the basin. Basin 4 is entirely within the 100 foot buffer to BVW,contains two rip rap level spreader, sediment forebay, and outlet structure that connects to a vegetated Swale which empties into the BVW. Basin 4 is approx. 65 feet by 30 feet. Basin 5 is partially located within the buffer zone to a BVW,contains two rip rap level spreaders,sediment forebay, and outlet which connects to a vegetated swale. Basin 5 is approx. 40 feet by 70 feet. No homes, structures, etc. are permitted to be constructed under this Order of Conditions in areas within the jurisdiction of the Conservation Commission. GENERAL CONDITIONS 1. This Order of Conditions must be recorded in its entirety(all 6 pages)at the Essex County Registry of Deeds or the Land Court for the district in which the land is located, after the expiration of the 10-day appeal period and within 30 days of the issuance. A copy of the recording information must be submitted to the Salem Conservation Commission before any work approved in this Order commences. Attachment to Order of Conditions N 64-434 Page 2of 6 2. Approval of this application does not constitute compliance with any law or regulation other than M.G.L Chapter 131,Section 40,Wetlands Regulations 310 CMR 10.00 and the City of Salem Wetlands Protection Ordinance,Salem Code Chapter 34,Section 34-1 —34-13. 3. All work shall be performed in accordance with this Order of Conditions and approved site plan(s). No alteration of wetland resource areas or associated buffer zones,other than that approved in this Order, shall occur on this property without prior approval from the Commission. 4. Prior to any work commencing,a sign shall be displayed showing DEP File#I64-434,and not placed on a living tree. 5. No work approved in this Order may commence until the ten(10)day appeal period has lapsed from the date of the issuance of this Order. 6. With respect to this Order,the Commission designates the Salem Conservation Agent as its agent with powers to act on its behalf in administering and enforcing this Order. 7. The Commission or its Agent,officers,or employees shall have the right to enter and inspect the property at any time for compliance with the conditions of this Order,the Wetlands Protection Act MGL Chapter 131, Section 40,the Wetlands Regulations 310 CMR 10.00,and the Salem Wetlands Ordinance,and shall have the right to require any data or documentation that it deems necessary for that evaluation. 8. The term"Applicant"as used in this Order of Conditions shall refer to the owner,any successor in interest or successor in control of the property referenced in the Notice of intent, supporting documents and this Order of Conditions. The Commission shall be notified in writing within 30 days of all transfers of title of any portion of the property that takes place prior to issuance of the Certificate of Compliance. 9. It is the responsibility of the applicant to procure all other applicable federal, state and local permits and approvals associated with this project. These permits may include but are not necessarily limited to the following: (1) Section 404 of the Federal Water Pollution Control Act(P.L. 92-500, 86 stat. 816), U.S.Army Corps of Engineers. (2) Water Quality Certification in accordance with the Federal Water Pollution Control under authority of sec. 27(5)of Chapter 21 of the Massachusetts General Laws as codified in 314 CMR 9.00. (3) Sewer Extension Permit from the DEP Division of Water Pollution Control under G. L. Ch. 2 1 A ss7 and 314 CMR 7.00. Any Board of Health permit for septic system design for any portion of the septic system within 100 feet of wetlands shall be submitted to the Commission prior to construction initiation. (4) Design Requirements for Construction in Floodplains under the State Building Code(780 CMR 744.). 10. If there are conflicting conditions within this Order,the stricter condition(s)shall rule. 11. All work shall be performed so as to ensure that there will be no sedimentation entering into wetlands and surface waters during construction or after completion of the project. 12. The Commission or its Agent shall have the discretion to modify the erosion/siltation control methods and boundary during construction if necessary. Attachment to Order of Conditions# 64-434 Page 3of 6 13. The Commission reserves the right to impose additional conditions on portions of this project or this site to mitigate any actual or potential impacts resulting from the work herein permitted. 14. The work shall conform to the following attached plans and special conditions: Final Approved Plans Definitive Sub-Division Plan of Chapel Hill in Salem Massachusetts (Title) Au Lst 20,2007 (Dated) Christopher R.Mello (Signed and Stamped by) City of Salem Conservation Commission (On file with) 15. Any proposed changes in the approved plan(s)or any deviation in construction from the approved plan(s)shall require the applicant to file a Notice of Proiect Chan a with the Commission. The Notice shall be accompanied by a written inquiry prior to their implementation in the field, as to whether the change(s)is substantial enough to require filing a new Notice of Intent or a request to correct or amend this Order of Conditions. A copy of such request shall at the same time be sent to the Department of Environmental Protection. 16. In conjunction with the sale of this property or any portion thereof before a Certificate of Compliance has been issued,the applicant or current landowner shall submit to the Commission a statement signed by the buyer that he/she is aware of an outstanding Order of Conditions on the property and has received a copy of the Order of Conditions. 17. Condition Number#47 as indicated shall continue in force beyond the Certificate of Compliance,in perpetuity,and shall be referenced to in all future deeds to this property. PRIOR TO CONSTRUCTION 18. Prior to the commencement of any activity on this site other than activities listed above,there shall be a Pre-Construction Meeting between the project supervisor, the contractor responsible for the work,and a member of the Conservation Commission or its Administrator to ensure that the requirements of the Order of Conditions are understood. The staked erosion control line shall be adjusted, if necessary, during the pre-construction meeting. Please contact the Conservation Commission Agent at(978)619-5685 at least forty-eight(48)hours prior to any activity to arrange for the pre- construction meeting. 19. Prior to the pre-construction meeting and commencement of any activity on this site,sedimentation and erosion control barriers shall be installed as shown on the approval plan(s)and detail drawings. The Commission and/or its Administrator shall inspect and approve such installation at the pre-construction meeting. 20. No clearing of vegetation,including trees,or disturbance of soil shall occur prior to the pre-construction meeting. Minimal disturbance of shrubs and herbaceous plants shall be allowed prior to the pre- construction meeting if absolutely necessary in order to place erosion control stakes where required. Attachment to Order of Conditions# 64-434 Page 4of 6 21. There shall be 40 hay bales and wooden stakes under cover on the site at all times to be used only for emergency erosion control. EROSION CONTROL 22. Appropriate erosion control devices shall be in place prior to the beginning of any phase of construction, and shall be maintained during construction in the wetland areas and buffer zones. The erosion control specifications provided in the Notice of Intent and the erosion control provision in the Order will be the minimum standards for this project;the Commission may require additional measures. 23. All debris, fill and excavated material shall be stockpiled a location far enough away from the wetland resource areas to prevent sediment from entering wetland resource areas. 24. Erosion and sedimentation control devices shall be inspected after each storm event and repaired or replaced as necessary. Any accumulated silt adjacent to the barriers shall be removed. 25. The area of construction shall remain in a stable condition at the close of each construction day. 26. Any de-watering of trenches or other excavation required during construction shall be conducted so as to prevent siltation of wetland resource areas. All discharge from de-watering activities shall be filtered through hay bale sediment traps,silt filter bags or other means approved by the Commission or its Administrator. 27. Within thirty(30) days of completion of construction on any given portion of the project,all disturbed areas in the completed portion of the site shall be permanently stabilized with rapidly growing vegetative cover,using sufficient top soil to assure long-term stabilization of disturbed areas. 28. If soils are to be disturbed for longer that two(2)months,a temporary cover of rye or other grass should be established to prevent erosion and sedimentation. If the season is not appropriate for plant growth, exposed surface shall be stabilized by other appropriate erosion control measures, firmly anchored, to prevent soils from being washed by rain or flooding. DURING CONSTRUCTION 29. A copy of this Order of Conditions and the plan(s)approved in this Order shall be available on site at all times when work is in progress. 30. No alteration or activity shall occur beyond the limit of work as defined by the siltation barriers shown on the approved plan(s). 31. All waste products,grubbed stumps,slash;construction materials,etc.shall be deposited at least 100 feet from wetland resource areas and 200 feet from river. 32. Cement trucks shall not be washed out in any wetland resource or buffer zone area,nor into any drainage system. Any deposit of cement or concrete products into a buffer zone or wetland resource area shall be immediately removed. 33. All exposed sub-soils shall be covered by a minimum of three(3)inches of quality screened loam topsoil prior to seeding and final stabilization. 34. Immediately following drainage structure installation all inlets shall be protected by silt fence,haybale barriers and/or silt bags to filter silt from stormwater before it enters the drainage system. R Attachment to Order of Conditions# 64-434 Page 5of 6 35. There shall be no pumping of water from wetland resource areas. 36. All equipment shall be inspected regularly for leaks. Any leaking hydraulic lines,cylinders or any other components shall be fixed immediately. 37. During construction,all drainage structures shall be inspected regularly and cleaned as necessary. 38. The applicant is herby notified that failure to comply with all requirements herein may result in the issuance of enforcement actions by the Conservation Commission including,but not limited to,civil administrative penalties under M.G.L Chapter 21 A,section 16. AFTER CONSTRUCTION 39. Upon completion of construction and final soil stabilization, the applicant shall submit the following to the Conservation Commission to request a Certificate of Compliance (COC): (1) A Completed Request for a Certificate of Compliance form(WPA Form 8A or other form if required by the Conservation Commission at the time of request). (2) A letter from a Registered Professional Engineer certifying compliance of the property with this Order of Conditions. (3) An"As-Built"plan signed and stamped by a Registered Professional Engineer or Land Surveyor showing post-construction conditions within all areas under the jurisdiction of the Massachusetts Wetlands Protection Act. This plan shall include at a minimum: (a) All wetland resource area boundaries with associated buffer zones and regulatory setback areas taken from the plan(s)approved in this Order of Conditions; (b) Locations and elevations of all stormwater management conveyances,structures and best management designs,including foundation drains,constructed under this Order within any wetland resource area or buffer zone; (c) Distances from any structures constructed under this Order to wetland resource areas- "structures"include,but are not limited to,all buildings,septic system components,wells, utility lines,fences,retaining walls,and roads/driveways; (d) A line delineating the limit of work-"work"includes any filling,excavating and/or disturbance of soils or vegetation approved under this Order; 40. When issued, the Certificate of Compliance must be recorded at the Essex County Registry of Deeds and a copy of the recording submitted to the Salem Conservation Commission. 41. If the completed work differs from that in the original plans and conditions,the report must specify how the work differs; at which time the applicant shall first request a modification to the Order. Only upon review and approval by the Commission, may the applicant request in writing a Certificate of Compliance as described above. 42. Erosion control devices shall remain in place and properly functioning until all exposed soils have been stabilized with final vegetative cover and the Conservation Commission and/or its Administrator has authorized their removal. ADDITIONAL CONDITIONS 43. Applicant voluntarily agrees that there will be no development within the C-Series of wetland flags, that erosion control measures shall be installed around C-Series flagged area, as well as orange snow dl Attachment to Order of Conditions# 64-434 Page 6of 6 fence shall be installed 5 feet outside of C-Series flagged area,as noted on the Plan of Land Dated July 20,2005 Signed and stamped by Christopher R.Mello,that was approved as part of the ORAD for the Chapel Hill property issued October 27,2005. 44. Applicant voluntarily agrees that the area to the east of the C-Series flagged area(as noted on the Plan of Land Dated July 20,2005 Signed and stamped by Christopher R.Mello,approved as part of the ORAD for the Chapel Hill property issued October 27,2005)will be restored and re-graded to natural organic make-up post construction. 45. Applicant voluntarily agrees to demarcate existing trees prior to construction located adjacent to or near proposed detention basins and work with the Conservation Agent prior to removal of trees to identify those trees that can be preserved and those that have to be cut down in order for detention basins and associated outfalls to be installed. 46. Applicant shall install a maximum of three(3)trail signs demarcating the location of the public trail located on the 13 acres of land open to the public as open space. Locations and details of sign to be worked out with the planning board. PERPETUAL CONDITIONS 47. The detention basins,vegetated swales, associated pipes, and other features that make up the drainage system shall be maintained as outlined in the approved Environmental Impact Statement for the Chapel Hill Subdivision in Salem,Massachusetts Prepared for Town and Country Homes June 2006 Revised August 2007,under Appendix A: Stormwater Managerment Plan: Operation and Maintenance Plan, and shall be the responsibility of the owners of the property where the detention basins are located, ie the homeowners association for basins 1-3 and owner of Lot 27 for basins 4 and 5.