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MASON STREET & FLINT STREET - ZONING
OF 45 ZIQJwhaDS3fl haQ • • Professional Land Surveyors &Civil Engineers ESSEX SURVEY SERVICE 1958- 1986 • OSBORN PALMER 1911 - 1970 • BRADFORD&WEED . 1885- 1972 • • • • • ENVIRONMENTAL IMPACT STATEMENT • • FOR • RIVERVIEW PLACE • • MASON STREET AND FLINT STREET i• SALEM, MASS. I� JANUARY 2008 • • REVISED: NOVEMBER 2008 +, REVISED: DECEMBER 23, 2008 Ii i• • 104 LOWELL STREET PEABODY, MASS. 01960 TELEPHONE: 978-531-8121 FAX: 978-531-5920 NATURAL ENVIRONMENT ' Air The major potential source of dust will be during the building demolition phase and during construction of site utilities, parking, driveways and landscaped areas. Wetting with water will be the primary method used to control dust generation. The site is located • immediately adjacent to existing residences and open space areas. (Mack Park and Leslie's Retreat Park). Prevailing winds are from the southwest into the northeast. r • No incineration is proposed for Riverview Place. Land • The site of Riverview Place consists of 4.3 acres of industrially developed land. It is • bounded on the west, in part, by Flint Street and, in part, by private residences along Flint Street, to the north by private residences and Mason St., to the east by an industrial site owned by Mason Realty Trust and to the south by the North River and land of the Commonwealth of Massachusetts. Existing elevations range from 5 feet above mean sea level at the North River to 26 feet at Mason Street. A major portion of the site is occupied by the so-called Salem Suede building and the Bonfanti building on Mason Street. Based upon test borings done in 2005 in connection with a Phase One Environmental Assessment, the lower portion of the Ssite (from the rear of the Bonfami building to the North River) appears to be filled land over fine sands and silts occurring at a depth of 8-10 feet from existing grade. Groundwater appears to follow the silt/clay strata at depths of four to six feet below existing grade. • No percolation tests were taken on site since wastewater will be discharged to the City of Salem municipal collection system. Virtually all of the property will be affected by the proposed development. Coverages as currently exist and as are proposed are summarized in Table 1. Existing and proposed grading patterns are shown on Sheets 5 and 6 of the Site Development Permit Plans. The only wet area adjacent to the project is the North River, which is tidal in the vicinity of the site. Alterations within the two hundred foot wide Riverfront Zone will be the subject of a Notice of Intent to be filed with the Salem Conservation Commission. S Those portions of the site below Elevation 10.3 are within the FEMA 100 year flood zone associated with the North River. Regrading of the site will be done in such a manner as to not diminish flood storage characteristics. The proposed buildings will be constructed above the base flood level. 0 0 TABLE 1 Site Coverage Characteristics Cover Type Existing Proposed Buildings 78,900 SF 71,380 SF Driveways & Industrial Yard Area 82,100 SF 47,300 SF Landscaped 26,165 SF 55,920 SF Walks -0- 12,565 SF Total: 187,165 SF 187,165 SF iThe relationship of the site to various community facilities is summarized in the following table: MBTA Station, Bridge Street 0.6 miles Downtown Salem 0.75 miles • Shopping Facilities on Highland Avenue 1.9 miles Bates School 1.0 miles Collins Middle School 0.75 miles Salem High School 1.4 miles Leslie's Retreat Park 0.1 miles Mack Park 0.1 miles Water and Wetlands The southerly boundary of Riverview Place is the North River. The particular reach is tidal and flows easterly, under North Street, to the Danvers River, and ultimately, Beverly Harbor. The North River is not a public or private water supply, nor is groundwater ' t within the project area a source of public or private water supply. Erosion control on site will be practiced in accordance with the program outlined on Sheet 8 of the Site Plans and details shown on Sheets 4 and 5 of the plan. In general, a primary erosion control-barrier will be located between the work area and the bank of the + river. Secondary barriers will be maintained on site at the downhill side of excavations, around soil stockpiles and around new catch basins, once installed. Silt barriers will v consist of staked haybales, backed with filter fabric and/or silt socks. If a temporary sediment basin is needed, its location will be determined in the field. rii b A • • • • Building demolition adjacent to the River will be a special consideration for the • developer. Conversations with a demolition contractor are being held to determine the general procedures which would be available to prevent the introduction of demolition waste into the river. The results of that investigation will be filed under separate cover. • Those portions of the site existing below Elevation 103 are subject to flooding in a 100 • year storm(as influenced by the North River). Computations are provided which • demonstrate that no loss in flood storage will occur as a result of proposed redevelopment activities. • Site drainage will be accomplished by collection of surface runoff into a series of piped • catch basins and manholes. Outflow from that system will be directed through an appropriately designed proprietary water quality treatment device (Stormceptor) before • discharge into the North River. Since the river is subject to coastal storm flowage, altered runoff rates need not be attenuated to be compliant with DEP Stormwater Management Policy(Standard 2). Computations of pre and post development runoff • rates are found in the Stormwater Management Plan and summarized as follows: • Storm Recurrence Peak Runoff Rate (cfs) • Interval Predevelopment Postdevelopment • • 2 year 10.99 10.71 • 10 year 16.91 16.66 • 100 year 26.24 26.05 • The slight decrease in runoff rates is attributed to improved surface characteristics (i.e. • landscaping). tAn analysis of predevelopment conditions has also been performed to quantify the impact \ of the ponding area which occurs to the rear of the Bonfanti site against the existing building at 72 Flint Street. That area was apparently served by two catch basins which drained to the river. A long term employee at the Flint Street site indicated that the pipe, which once connected those basins to the river, was cut off when the sheet pile bulkhead • was constructed on the bank. This has not yet been confirmed by inspection of the eight inch pipe visible in the piling. 4 • The following peak rates of runoff were calculated to represent the impact of the ponding area upon flows to the North River: • • • Storm Recurrence Predevelopment Interval Peak Runoff Rate (cfs) 2 year 8.36 cfs 10 year 12.85 cfs 100 year 19.95 cfs Soils infiltration is proposed. Bioretention cell locations will be confirmed following building demolition. Those BMP's would accept only clean roof runoff. It is expected that construction and maintenance of a complete stormwater management system in compliance with the maximum feasible DEP Stormwater Management Policy will improve runoff discharge significantly over existing conditions, thus incrementally improving the water quality of the North River. • Energy Increased electric and gas energy will be required for Riverview Place. Natural gas will {1 be brought into the site as to be designed by Keyspan and will be used for heating, f cooling and clothes drying appliances. Electric energy will be brought into the site as to • be designed by National Grid and distributed to a transformer for each building. That system will be installed in underground conduit. . Noise Ambient daytime noise levels will increase during demolition of existing buildings, site preparation and construction. Working days and hours will be limited to those_specified . within the ordinances of the City of Salem. In the long term, the residential proposal would result in slight increases in noise due to increased automobile activity to and from the site and mechanical equipment serving the building. Local Flora and Fauna Due to the urban nature of the site and surrounding areas, wildlife is limited to small mammals and songbirds. Those species utilizing the site as habitat or cover will be • displaced during construction but will tend to return following site construction activities. There are sparse areas of existing vegetation on site, especially along its eastern boundary. New landscape areas on site in the proposed condition will occupy some 55,920 square feet or 29.88 percent of the site. Details of proposed landscaping are shown on a plan by Huntress Associates. • • No known endangered specie habitats are indicated within the project area on the October • 1, 2006 Massachusetts Natural Heritage Atlas. A slight improvement in water quality in the North River is expected as a result of a DEP compliant stormwater management system. • • • • • • • • • • • • • • ♦ • • • ♦ • • • • • • MAN-MADE ENVIRONMENT Land Use The project conforms with the growth plans for the area and the City in general as evidenced by its allowed use within the North River Canal Corridor District and the action of the Salem Zoning Board of Appeals as to allowance of increased density. Land uses to the west and north of the site are residential. Land use to the east is industrial. To the south is located the North River and Leslie's Retreat Park. No public or common recreation areas exist within the site of Riverview Place. An • exercise room and meeting room are planned within the building on Mason Street to which residents of Riverview Place would have access. A walkway is proposed on the • south side of the property along the North River as a potential future link leading east and • west along the north boundary of the river. An easement along that same boundary is provided to allow for the future extension of Commercial Street. A walkway adjacent to 73 Mason Street will provide a pedestrian path from the site to Mason Street. Density Riverview Place is proposed to consist of three multi-family_buildings, each of which will contain a mix of one and two bedroom units as well as parking on the basement level. • The building on Mason Street will also contain 5,000 square feet of commercial space on • the first floor level. The floor areas of the one bedroom units will vary from 760 to 900 square feet. Two bedroom units are planned to have floor areas of 1,040 to 1,280 square feet. Table A describes the characteristics of the proposed buildings and Table B describes the proposed coverages of the site. TABLE A Proposed Building Characteristics Building 1 Bedrm. 2 Bedrm. Garage No. of Designation Units Units Spaces. Stories ` 24 Unit 9 15 -0- 3 42 Unit 22 ' 20 20 3 to 4 64 Unit 19 45 203 3 to 4 i • • • A • TABLE B Site Coverages Buildings Parking/ Walks Landscaped Open • Driveways Space Area Percent Area Percent Area Percent Area Percent (SF) (SF) (SF) (SF) 71,380 38.14 47,300 25.27 12,565 6.71 55,920 29.88 • * Total Site Area is 187,165 SF (4.3 Acres) Zoning The existing zoning designation of the site is North River Canal Corridor. Properties to • the west on Flint Street are zoned Industrial but residentially used as are properties to the • north on Mason Street..Land to the east of the site is zoned NRCC and used industrially. Property to the south between the site and Bridge Street is zoned Business Park 40 Development and utilized as open space (Leslie's Retreat Park). lie Architecture • The site and proposed buildings are.to be terraced in order that it might flow with the existing topography of the site which ranges from Elevation 26 at Mason Street to • Elevation 9 along the top of the North River bank. Site terracing will be accomplished in part by sloping and in part by retaining walls. New landscaping will be installed throughout the property. The 24 unit Mason Street building will be 3 stories or 39 feet above average finished • grade. The 42 and 64 unit buildings will have both three and four story elements ranging from 39 to 49 feet above finish grade. Those heights are similar to the existing Salem Suede Building. • . General visual impacts from Riverview Place are summarized as follows: • Setbacks from buildings to the North River will increase from a present distance of ten feet to distances of 50 or more feet; thus improving views within the river • corridor. • • Views into and through the site will be improved by increased building setbacks. • The Mason Street portion of the site will improve aesthetically by the removal of ' the existing industrial and residential buildings and construction of a new residential building having a landscaped setback of 7 to 9 feet. 40• • • Common areas will be provided at the elevator lobby in each building. A commercial area will be provided in the Mason Street (24 unit) building. • • Laundry facilities will be provided in each unit. Trash facilities will be provided at a central location in each building. Trash storage will be in closed fenced dumpsters • located to the northeast of the 64 unit building and southwest of the 42 unit building. • Removal will be by a private rubbish contractor. rHistoric Buildings Historic Sites and Archeological Sites There are no known historic buildings or sites on or immediately adjacent to the site as • indicated by the National Register Historical Districts and Landmarks Map and the City of Salem Local Historic District Map. • • • • • • • • • • • • • • • • • • • • • • • • • PUBLIC FACILITIES Water Supply, Flow Pressure and Distribution The source of water for Riverview Place is to be from the City of Salem municipal supply. Consumptive demand for the 130 units is projected to be 24,000 gallons per day. . The building is to be Class 5A or 2C construction and sprinkled. Fire fighting requirements are estimated to be 1,000-1,250 gallons per minute. The site is to be served by a newly constructed eight inch diameter cement tined ductile iron water main which will connect to the City system on Flint Street(8 inch) and Mason Street (12 inch). Two new hydrants will be built on site, the locations of which are to be . approved by Salem Fire Department. Separate potable water and sprinkler connections will be provided for each building. ` Sanitary Sewerage Connection and Collection Facilities Riverview Place is expected to generate an average daily flow of 24,000 gallons per day of domestic wastewater. That wastewater will be collected into a new system of eight • inch diameter polyvinyl chloride gravity sewers leading from the Mason Street building • to an existing sewer manhole on the south side of the Flint Street entrance to the property. Wastewater then discharges into the SESD interceptor which runs parallel to the railroad. All existing sewer connections to the site will be cut off and capped at the property line in . accordance with the requirements of the Salem Department of Public Works. Storm Drainage Facilities Site drainage will be accomplished by collection of surface runoff into a series of piped catch basins and manholes. Outflow from that system will be directed through an appropriately designed proprietary water quality treatment device before discharge into the North River. All catch basins will be constructed with four foot deep sumps and hooded outlets. . The City has expressed a concern that a portion of the existing Mason Street storm drainage system may pass through the site of Riverview Place. Surveys accomplished to date have not indicated the existence of any such crossing. The Developer has committed to continue investigating this matter. If a drain is found to cross the site, a new drain and • easement will be provided. This matter is to be resolved prior to action by the Planning • Board on the application. The system will be maintained by the Owners of Riverview Place in accordance with the requirements of the Operations and Maintenance Plan included with the Stormwater Management Plan. r Refuse Disposal • It is expected that each building will have a centralized point of trash collection. The • trash will be stored in on-site dumpsters to be located to the north of the 64 unit building for pickup by a private contractor. The project is expected to generate 150-200 tons of domestic refuse annually. Traffic Facilities The site may be entered or exited from both Flint Street and Mason Street. • A total of 309 parking spaces are proposed for the 130 units. 223 spaces will be located • in garages in the buildings and 86 spaces outside of the building. The Developer has committed to reserve 12 spaces on the Flint Street side of the project for use by • neighborhood residents. A complete traffic study has been prepared by Earthtech and will be subjected to a peer review. • Electric Power The anticipated electric demand for Riverview Place will be 100,000 KWH per month. . The source of that power will be National Grid. On site electrical facilities will be built ' underground. Proposed transformer locations are depicted on Sheets 4 and 5 of the plan. Gas ' Riverview Place will utilize natural gas for heating, cooking and clothes drying. The anticipated demand will be 90,000 therms per year. The source of natural gas will be • Keyspan from existing mains on Flint and/or Mason Streets. r COMMUNITY SERVICES Schools Two similar projects have been examined as to the number of school-aged children living in each. A similar project in Danvers, Massachusetts has a total of 240 units within • which live 12 school-aged children. Jefferson Crossing on Bridge Street in Salem, Mass. • has a total of 290 units within which live 14 school-aged children. Based on an average of.05 school-aged children per unit, it is expected that some 7-10 children would be • added to the public school system, assuming all residents were new to the City. The relationship of the project to neighborhood schools is as follows: • Bates Elementary School 1.0 miles Collins Middle School 0.75 miles . Salem High School 1.4 miles Recreation No recreation areas exist within the property within which Riverview Place is to be built. A six foot wide walkway is to be built south of the parking lot and will be available to become part of a walking link on the north bank of the river. . Police The total population of Riverview Place is estimated to be 250 to 300 persons. If each w unit generated 1.5 automobiles, approximately 200 cars would be present on the site. Fire Three buildings are proposed to be constructed on the site of Riverview Place. The • buildings will be of three and, in part, four story construction. The proposed construction • will be Class 5A or 2C (as defined in the Massachusetts Building Code). Buildings will ,* be fully sprinkled. The source of water will be City of Salem municipal supply. A new eight inch water main will be constructed from Flint Street to Mason Street and at least two fire hydrants • located in the site. Available fire flow volumes will be discussed with the City or determined by flow testing if no record data is available. r , • Public Works • No public roadway will be constructed within Riverview Place. Maintenance and snow • removal will be done privately. New water and sewer connections will be built from • existing facilities into the site. Existing connections will be cut and capped in accordance with the requirements of the Salem Department of Public Works. • On site sewer, water and storm drainage facilities will be privately maintained. The matter of a possible storm drain leading from Mason Street to the North River is addressed within the Public Facilities section of this document. HUMAN CONSIDERATIONS • Aesthetics and Visual Impact The site is currently occupied by industrial buildings together with open storage. Buildings are at or near the end of their useful life. The following changes in present • character of the neighborhood are anticipated: • Setbacks from buildings to the North River will increase from a present distance of ten feet to distances of 50 or more feet. • • Views into the site will be improved by that increased setback. • The Mason Street portion of the site will improve aesthetically by the removal of the existing industrial and residential buildings and construction of a new • residential building having a landscaped setback of 7 to 9 feet. • Parks, Forests and Recreational Areas • Views from Mack Park and Leslie's Retreat Park will improve significantly. No other • direct impacts on either of the parks are expected. No existing park, forest or open space areas will be removed from public use. A link to a future river walk on the north side of the river will be constructed by the Developer which would be intended to become available for public use. Public Health Long term public health characteristics are expected to improve incrementally as a result • of: S • Removal of industrial building and processing materials and supplies stored therein; • • Removal of yard storage materials; • Removal of harborages for insects and rodents; • Improved quality of stormwater discharges into the North River. A licensed pest control contractor shall be retained to apply needed pesticides and rodenticides prior to commencement of building demolition. That contractor will also ' monitor the site during building demolition and take such actions as may be necessary. . Dust generated during demolition and site work shall be controlled by wetting and . minimizations of exposure times for unstabilized areas. • • • Professional Land Surveyors & Civil Engineers • ESSEX SURVEY SERVICE 1958- 1986 OSBORN PALMER .1911 - 1970 . BRADFORD&WEED 1885- 1972 • • • • STORMWATER MANAGEMENT REPORT • RIVERVIEW PLACE FLINT AND MASON STREETS • SALEM, MA. 01970 • NOVEMBER 2008 REVISED: DECEMBER 23, 2008 • . Owner/Applicant: • Riverview Place LLC ^• 6 Cider Mill Road • Peabody, MA. 01960 • (978)-979-4072 • • Engineer: • Clayton A. Morin, P.E. 30969 (Mass.) r • Eastern Land Survey Associates, Inc. • • 104 Lowell Street �,�t"OF • Peabody, MA. 01960 moa C M A. . o MOR � CIVI .30 • 9F 1ST • SSS • '' • • • • • . 104 LOWELL STREET • PEABODY, MASS. 01960 • TELEPHONE: 978-531-8121 FAX: 978-531-5920 l�• TABLE OF CONTENTS • Section Number Page Number One— Site Conditions • 0 Existing Conditions 1-1 • • Soil Conditions 1-1 • • Resource Areas 1-1 Two—Stormwater Management • Project Description 2-1 • • Low Impact Development Measures 2-1 • Standard 1 —No New Untreated Discharges 2-1 • Standard 2—Peak Rate Attenuation 2-1 • • Standard 3 —Recharge 2-2 . • Standard 4— Water Quality 2-3 • • Standard 5 -Land Uses with Higher Potential Pollutant Loads 2-3 • Standard 6—Critical Areas 2-3 • Standard 7—Redevelopments 2-3 • Standard 8—Construction Period Pollution Prevention and Erosion Control Plan 2-4 • • Standard 9—Operation and Maintenance Plan 2-4 • • Standard 10—Prohibition of Illicit Discharges 2-4 Three—Hydrologic and Hydraulic Analysis • • Standard I —Scour/Erosion Analysis 3-1 . • Standard 2—Peak Rate Attenuation Analysis 3-2 • Standard 3 —Recharge Analysis 3-9 • Standard 4— Water Quality Treatment 3-11 • Piped Drainage Facilities Analysis 3-15 Four—Additional Submissions • Stormwater Pollution Prevention Plan • Permit Requirements • • Checklist for Stormwater Report • Operation and Maintenance Plan • Redevelopment Checklist • Demolition Plan I� L� • • • • • • • • • • ! • i SECTION 1 • SITE CONDITIONS • • • • • i • • • • • • • • i • • i • • SITE CONDITIONS Existing Conditions The site of Riverview Place is located on Flint and Mason Streets and the North River • and is comprised of 4.3 acres of industrially developed and used land. The site has been • used for such purposes since the 1800's. The primary industrial use on site has been activities related to leather manufacturing until recent years when a variety of commercial activities have occurred on the property. • Some 2.9 acres of the site are covered by buildings or pavement, 0.8 acres by hard- packed gravel yard areas and 0.6 acres of the site by sparsely vegetated areas. • The site drains to the North River. Municipal water and sewer services are available . from both Mason and Flint Streets. The City has expressed a concern that a portion of the existing Mason Street storm drainage system may pass through the site of Riverview Place. Surveys accomplished to • date have not indicated the existence of any such crossing. The Developer has committed • to continue investigating this matter. If a drain is found to cross the site, a new drain and easement will be provided. This matter is to be resolved prior to action by the Planning Board on the application. • Soil Conditions Soils on the site are classified as on the NCRS database and have been likely disturbed • completely by on-going activities for the last 150 years. Soils have been assumed to be • in Hydrologic Soil Group D for analysis purposes. (The Conservation Commission is • requested to waive the requirements of Standard 2 since the site is subject to coastal storm flowage). • Resource Areas The following resource areas are present on site: • 1. Bank and associated 100 foot Buffer Zone as associated with the North River; • 2. 200 foot wide riverfront; 3. Land subject to coastal storm flowage(At or below Elevation 10.3,N.G.V.D.). 1-1 SECTION 2 STORMWATER MANAGEMENT 11 I � Project Description • The proposed project is to completely redevelop the site for use as 130 units of multi- family housing in three buildings and a 5,000 square foot commercial space in Building • 3. Stormwater is to be managed in accordance with D.E.P. Technical Guidance. • Low Impact Development Measures Low impact development measures include the use of bioretention cells and an area of porous pavement. The LID measures will be finalized once the site assessment has been completed. If on-site conditions so require,the LID BMP's will be constructed with • impervious liners and underdrains. Standard 1 • No new stormwater conveyances (e.g. outfalls) may discharge untreated stormwater • directly to or cause erosion in wetlands or waters of the Commonwealth. Site runoff will be directed through an 18 inch drain to the existing riprap lined portion of • the bank of the North River. A scour analysis is provided in Section 3. • Standard 2 Stormwater management systems shall be designed so that post-development peak • discharge rates do not exceed pre-development peak discharge rates. This Standard may • be waived for discharges to land subject to coastal storm flowage as defined in 310 CMR 10.04. • A stormwater collection and management system has been designed for Riverview Place • in the greatest degree of compliance achievable under the 2008 Department of • Environmental Protection Stormwater Standards. Site drainage will be accomplished by collection of surface runoff into a series of piped • catch basins and manholes. Outflow from that system will be directed through an appropriately designed proprietary water quality treatment device before discharge into the North River. The storm drainage collection system has been sized on the basis of a ten year storm. Since most of the basins are located in low points, storms of higher • intensity can be accommodated with minor(3 to 6 inch) ponding and pipe surcharging. Computations of predevelopment and postdevelopment runoff from the site and properties along Mason and Flint Streets which flow into the property have been performed using TR-55 methodology. Those computations are provided in Section 3 of • the report and are summarized as follows: 2-1 Storm Recurrence Interval Peak Runoff Rate (cfs) Predevelopment Postdevelopment • 2 Year 10.99 10.71 10 Year 16.91 16.66 • 100 Year 26.24 26.05 The slight decrease in postdevelopment runoff is attributed to landscape addition and improvements throughout the site. Since portions of the site are subject to coastal storm • flowage, Stormwater Management Policy does not require attenuation of • postdevelopment runoff provided compliance with the Standard is waived by the local Conservation Commission. • An analysis of predevelopment conditions has also been performed to quantify the impact • of the ponding area which occurs to the rear of the Bonfami site against the existing building at 72 Flint Street. That area was apparently served by two catch basins which drained to the river. A long term employee at the Flint Street site indicated that the pipe, • which once connected those basins to the river, was cut off when the sheet pile bulkhead • was constructed on the bank. This has not yet been confirmed by inspection of the eight • inch pipe visible in the piling. The following peak rates of runoff were calculated to represent the impact of the ponding • area upon flows to the North River: Storm Recurrence Predevelopment Interval Peak Runoff Rate(cfs) • 2 year 8.36 cfs 10 year 12.85 cfs • 100 year 19.95 cfs Standard 3 Loss of annual recharge to ground water shall be eliminated or minimized through the • use of infiltration measures including environmentally sensitive site design, low impact • development techniques, stormwater best management practices, and good operation and maintenance. At a minimum, the annual recharge from the post-development site shall approximate the annual recharge from pre-development conditions based on soil type- 2-2 IJ • Prior site development activities have rendered site soils unclassifiable and virtually eliminated the opportunity for groundwater recharge. Following the site assessment after • demolition of the existing buildings, the feasibility of constructing one or more • bioretention cells to accept roof runoff will be investigated. Landscaped areas on site will increase greatly thus improving the opportunity for groundwater recharge. • Standard 4 • Stormwater management systems shall be designed to remove 80%of the average annual post-construction load of Total Suspended Solids (TSS). • A series of deep sump hooded catch basins will collect runoff from paved areas of the site • and direct that runoff to an appropriately sized Stormceptor. Roof runoff from areas where mechanical equipment is contained will also be directed to that devise. A TSS removal rate of 82.75 % will result. No treatment facilities currently exist. Standard 5 For land uses with higher potential pollutant loads, source control and pollution • prevention shall be implemented in accordance with the Massachusetts Stormwater • Handbook to eliminate or reduce the discharge of Stormwater runoff from such land uses to the maximum extent practicable. The property use is primarily residential and is not considered to be a use with higher • potential pollutant loads. Standard 6 Stormwater discharges within the Zone H or Interim Wellhead Protection Area of a • public water supply and stormwater discharges near or to any other critical area require • the use of the specific source control and pollution prevention measures and the specific structural stormwater best management practices determined by the Department to be suitable for managing discharges to such areas as provided in the Massachusetts • Stormwater Handbook. Stormwater discharge is not into any water supply area nor near any other critical area. Standard 7 A redevelopment project is required to meet the following Stormwater Management Standards only to the maximum extent practicable: Standard 2, Standard 3, and the pretreatment and structural best management practice requirements of Standards 4, 5 • and 6. Existing stormwater discharges shall comply with Standard I only to the • maximum extent practicable. A redevelopment project shall also comply with all other requirements of the Stormwater Management Standards and improve existing conditions. 2-3 The project is a redevelopment. Standards 1, 2, 4, 8, 9 and 10 are met. Standard 3 is met to the maximum extent practicable. Standard 2 is requested to be waived although • discharges will be slightly reduced as a result of redevelopment. Standards 5 and 6 are • not applicable to the site. Standard 8 • A plan to control construction related impacts including erosion, sedimentation and other • pollutant sources during construction and land disturbance activities (construction period erosion, sedimentation andpollution prevention plan) shall be developed and implemented. • A draft NPDES SWPPP is included in Section 4; erosion control measures are also outlined on the Plan and within the Operation and Maintenance Plan. • Standard 9 A long-term operation and maintenance plan shall be developed and implemented to ensure that stormwater management systems function as designed. • A long term Operation and Maintenance Plan for the various stormwater best • management practices is provided in Section 4. Standard 10 • All illicit discharges to the stormwater management system are prohibited The stormwater management plan includes a statement as to prohibition of illicit • discharges. A statement for the site wilt be provided after demolition is completed. 2-4 SECTION 3 HYDROLOGIC AND HYDRAULIC ANALYSIS lir EASTERN LAND SURVEY ASSOCIATES, INC. JOe 3Z`"Er`w f'. • Christopher R. Mello PLS SHEETNO. OF • 104 Lowell Street CALCULATED BY d DATE ��—O �• PEABODY, MA 01960 • (978) 531-8121 CHECKED BY �� DATE • SCALE Sce�a_ AAtawJs' s Tpp4E •gt arl_rvN b..M�.�c 6i�. 'SS��`r`^.. 0�7 �' cZ�t)EsaV K>w • CI ov.0 . YS__ `P(LOP,Ovv-,5 ro_... i?fSc}J 42Cs pil • rz%PROP i bA toff... Tic....... goA!W— ot-- Tr1a \J pi-\.\i rt\_v8x- • . faS1.\C3.91t 4 4gV6 rv��AIJ 4� �.t� .t_lrft= i2.\.Pt2.OL'_...... \5 ;"C�(�3.Ge��.• _,0�.7 A ! 2 Z.,o l !s60p � . . _ .... .p,4!4P..n 3 011 ren 6%-n _C.a0 1 P%v n e'o S dv • -�-taae• ;.. • , \.rFC 9_\.0M ....... `J41E_M • •D_\SSW ptic� UES+-c�c\'t OF...... L. 1 r'Ae^l .�eT� • ..�5 �O"1 .... E'Z1@0 ...... TO_._G�•vv�P_TLO Y•rl\SE _'14 U't-+_ ��lDQic.\ • _ -___ ....... . p __. . ... i.. .-.._... _ ... .._._. . , .. JOBEf2 lEW �`A GoT SA G-YN EASTERN LAND SURVEY ASSOCIATES, INC. Christopher R. Mello PLS SHEET NO. 1 OF- �y 104 Lowell Street CALCULATED BY DATE • PEABODY, MA 01960 �j (978) 531-8121 CHECKED BY DATE a c5 SCALE • 2uNOFFalvgF- _NOrA(�jrcK e.Cv\Qv'Cu1 I\© t.IS Ex\S�_It-j. cva.O\Z\ dJ3 .. • _.._.... _Ro� J cr AgVVo `�,._! S • ......_. __ �?\2R-F�er"e :.A.RET!J. 'y CN ... Camel... • _... OPEa. SPncF ft�\5t. •_°t ;.... 8.4 _.. l5•C. • �e+ �,�Pese1�'2 G[ aovL `b FSS....... I1• • 371Cno�E._... •dM1?oS... .. - _ • w o^Ca � Sq.3.T� Cpw.00s, \c- oaL 543. �5`l5 -`1S A-%; • Oati=;•�'1C._._ \ m PEI?-.y\ob4 .... :..._1_•.15 , :..._. `3 Pi _ :._._ yl"C � __ ..... oFev g4ec Fol_1L ...... • O-t.Sne l , .gEct�tlooS 1,t5. so • <24 Ev 444 cF Goo D. > • /, ,L,-\E rzn10'IE , E,c vS'l\QCh__ C6.JLg ,$ C TL� Mo,VpL OF • S�a.,?O�US •'. _. • \w,oeav•ws3.25, [1• QPM SpocF. (rr�•a .41c '_• 1 \ Uc<. • c 1 ? 4\ 4 �3A 3't..... - .9 i. J_Sc � .. 3 . 2 : • 4 ! Hydrograph Plot • • Hydrallow Hydrogmphs by Intelisolve • Hyd. No. 1 Predevelopment Hydrograph type = SCS Runoff Peak discharge = 10.99 cfs ! Storm frequency = 2 yrs Time interval = 6 min Drainage area = 5.75 ac Curve number = 95 ! Basin Slope = 0.0 % Hydraulic length = 0 ft • Tc method = USER Time of conc. (Tc) = 15 min • Total precip. = 3.10 in Distribution = Type III • Storm duration = 24 hrs Shape factor = 484 Hydrograph Volume=49,841 cult • 0 • 1 - SCS Runoff - 2 Yr - Qp = 10.99 cfs • 15 • • • • 10 • " • tY • 5 • • • 0 0 0.0 2.4 4.8 7.2 9.6 12.0 14.4 16.8 19.2 21.6 24.0 ! Time (hrs) • A Hyd. 1 • ! • • • • • 0 3 .3 Fie • • Hydrograph Plot -1, aF A- • • Hydraflow Hydrogra^by Intelisolve • Hyd. No. 1 • Predevelopment • Hydrograph type = SCS Runoff Peak discharge = 16.91 cfs • Storm frequency = 10 yrs Time interval = 6 min • Drainage area = 5.75 ac Curve number = 95 Basin Slope = 0.0 % Hydraulic length = 0 ft • Tc method = USER Time of conc. (Tc) = 15 min • Total precip. = 4.60 in Distribution = Type III • Storm duration = 24 hrs Shape factor = 484 • Hydrograph Volume=79,733 cuff • • • • • 1 - SCS Runoff - 10 Yr - Qp = 16.91 cfs • • 20 • • 15 • • , • � 1 • • � 5 • • 01 1 0.0 2.4 4.8 7.2 9.6 12.0 14.4 16.8 16.2 2i.6 24.0 Time (hrs) • ® Hyd. 1 • • • • • • • • • 3-� Hydrograph Plot • Hydmflo Hydrographs by Intelisolve Hyd. No. 1 Predevelopment Hydrograph type = SCS Runoff Peak discharge = 26.24 cfs Storm frequency = 100 yrs Time interval = 6 min Drainage area = 5.75 ac Curve number = 95 Basin Slope = 0.0 % Hydraulic length = 0 ft • Tc method = USER Time of conc. (Tc) 15 min Total precip. = 7.00 in Distribution = Type III Storm duration = 24 hrs Shape factor = 484 • Hydrograph Volume=125,348 aft • • • • 1 - SCS Runoff - 100 Yr - Qp = 26.24 cfs 30 52015 25--- 20--- 15 � 1 � 5 01 1 0.0 2.4 4.8 7.2 9.6 12.0 14.4 16.8 19.2 21.6 24.0 Time (hrs) / Hyd. 1 • 3 - S • • • • • • • • • • • POSTDEVELOPMENT RUNOFF COMPUTATIONS • • • • • • • • • • • • • • • • • • • • • • • • • • • • i • i Hydrograph Plot , a r- 3 • Hydraflow Hydrographs by Intelisoke Hyd. No. 2 Postdevelopment • Hydrograph type = SCS Runoff Peak discharge = 10.71 cfs Storm frequency = 2 yrs Time interval = 6 min Drainage area = 5.75 ac Curve number = 94 Basin Slope = 0.0 % Hydraulic length = 0 ft • Tc method = USER Time of conn (Tc) = 15 min Total precip. = 3.10 in Distribution = Type III Storm duration = 24 hrs Shape factor = 484 • Hydrograph Volume=47,880 cult • II • 2 - SCS Runoff - 2 Yr - Qp = 10.71 cfs 15- 40 54 1 � w n Q 5 • • 0 0 0.0 2.4 4.8 7.2 9.6 12.0 14.4 16.8 19.2 21.6 24.0 Time (hrs) 1 Hyd. 2 r 3 -C- • • Hydrograph Plot • Zo� 3 Hydratlow Hydrographs by IntelisoWe • • Hyd. No. 2 • Postdevelopment • Hydrograph type = SCS Runoff Peak discharge = 16.66 cfs • Storm frequency = 10 yrs Time interval = 6 min Drainage area = 5.75 ac Curve number = 94 • Basin Slope = 0.0 % Hydraulic length = 0 ft • Tc method = USER Time of conc. (Tc) = 15 min • Total precip. = 4.60 in Distribution = Type III • Storm duration = 24 hrs Shape factor = 484 • Hydrograph Vokme=76,564 tuft • • • • • 2 - SCS Runoff - 10Yr - Qp = 16.66 ds • 0Q20- Or 1 • • • • • 0 • 0.0 2.4 4.8 7.2 9.6 12.0 14.4 16.8 19.2 21.6 24.0 Time (hrs) • ® Hyd. 2 • • • J • • • • • a I• • Hydrograph Plot a r,r- 3 • Hydraflow Hydrographs by Intelisolve 0 � Hyd. No. 2 • Postdevelopment Hydrograph type = SCS Runoff Peak discharge = 26.05 cfs . Storm frequency = 100 yrs Time interval = 6 min Drainage area = 5.75 ac Curve number = 94 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = USER Time of cone. (Tc) = 15 min Total precip. = 7.00 in Distribution = Type III • Storm duration = 24 hrs Shape factor = 484 Hydrograph Volume=123,049 tuft • • • 2 - SCS Runoff - 100 Yr - Qp = 26.05 ds 0 3 0 25-- 0 i 2 • 0 1 r 1 0 5 0 .JI ILI L 0 0.0 2.4 4.8 7.2 9.6 12.0 14.4 16.8 19.2 21.6 24.0 0 Time (hrs) 0 / Hyd. 2 0 • 9 • • 0 0 0 3_g Hydrograph Plot • Hydmflow Hydrographs by Irdelisolve Hyd. No. 3 • Alternate Predevelopment • Hydrograph type = SCS Runoff Peak discharge = 8.36 cfs Storm frequency = 2 yrs Time interval = 6 min Drainage area = 4.37 ac Curve number = 95 0 Basin Slope = 0.0 % Hydraulic length = oft Tc method = USER Time of conc. (Tc) = 15 min Total precip. = 3.10 in Distribution = Type 111 0 Storm duration = 24 hrs Shape factor = 484 0 Hydrograph Volume=37,879 cult • 0 0 • 0 3 - SCS Runoff - 2 Yr - Qp = 8.36 cfs 0 10 • 8 0 0 • s 0 4 • 0 2 0 • 0 0 0.0 2.4 4.8 7.2 9.6 12.0 14.4 16.8 19.2 21.6 24.0 0 Time (hrs) r / Hyd. 3 0 0 0 0 • 0 0 0 0 3-8 a 0 Hydrograph Plot • Hydraflow Hydrographs by Intelisolve 0 Hyd. No. 3 0 Alternate Predevelopment 10 Hydrograph type = SCS Runoff Peak discharge = 12.85 cfs • Storm frequency = 10 yrs Time interval = 6 min Drainage area = 4.37 ac Curve number = 95 Basin Slope = 0.0 % Hydraulic length = oft • Tc method = USER Time of conc. (Tc) = 15 min . Total precip. = 4.60 in Distribution = Type III Storm duration = 24 hrs Shape factor = 484 Hydrograph Volume=59,837 cuft • 0 3 - SCS Runoff - 10 Yr - Qp = 12.85 cfs 15 � 10 w 0 C3 0 5 0 0.0 2.4 4.8 7.2 9.6 12.0 14.4 16.8 19.2 21.6 24.0 Time (hrs) e / Hyd. 3 r 0 � 3 _ 8b • ! Hydrograph Plot • Hydraflow Hydrogmphs by Inlelsolve • Hyd. No. 3 Alternate Predevelopment Hydrograph type = SCS Runoff Peak discharge = 19.95 cfs • Storm frequency = 100 yrs Time interval = 6 min • Drainage area = 4.37 ac Curve number = 95 Basin Slope = 0.0 % Hydraulic length = 0 ft • Tc method = USER Time of conn (Tc) = 15 min • Total precip. = 7.00 in Distribution = Type 111 • Storm duration = 24 hrs Shape factor = 484 • Hydrograph Volume=95264 cull • • • • 3 - SCS Runoff - 100 Yr - Qp = 19.95 cfs • 20- 10-- 5-- .000)105 • 0 • 0.0 2.4 4.8 7.2 9.6 12.0 14.4 16.8 19.2 21.6 24.0 • Time (hrs) • • / Hyd. 3 • • ! • • • • • • 3- 8G • • EASTERN LAND SURVEY ASSOCIATES, INC. SOB Christopher R. Mello PLS SHEET NO. 1 OF Z • 104 Lowell Street CALCULATED BY �\A M DATE N-o E • PEABODY, MA 01960 (978) 531.8121 CHECKED BY DATE • SCALE • • -� �19 Y7�(l 'M\Nl✓ __'2E @C2..\C4EC! "R;E C�A.IICE ���r Pl.�. SC,I. '[.E�pEs-$ �.. ... • _. ,_4N"t14 :... Ems... T1�$'l'04 • Iue2Easo v. c-�t env_1o�S ..cRA ._ © 1 o -szr ' C ..... So.k.. TAPE iprtc� t...17eP��' .. - � v�a Zecyklre� • 3- _3S 12r 1 e_ ...... zs +• ...3 • • _Sa.�nf'Lt= LtJt,c..... FnR- ...._�je.\.__.'C�iQF�°'�': • • Z C�o�w1E , A�o��nP�E vo�um�._ rte, �cu , _ PQdM1pgy.� . L_ • .... �� .. CL � ..... S V ILC- a yr 4.RL�'� = , I O IeL � Cu ZR•-. _ • • '>=on _G" �aaa\Jc, ?�jJpF�uc; (\3 f S�mP�g1 ... ........... = 13LA3 CSZn • SSS v*rv1 ho 9z a 35 • S.A• c w\uuccf = 3 �S . SF 5 ycQD.,Wc • �a � \.t5o_�o r .\6_ �zS+3.82)/2 �1 ( 5 nZo " .Valu Me .=.. 3'L8_yz yc ._ 35 Z".N • —Cozy �,1 Shy. • Ct mac. �(t _`3�\w\� �..._ �-' d5 �_ '. I�aa4�.J�._untJmtT _ € 7- 111 C So,w XOI�MIQ 3lo C{ . a toc..... a�urnfc` G.4rl cam.. •HmMn'me-�iunnmmizosi mnmm ��2_4 � '.. � !1 • 2 .L^�•�-J �j�/CE -- �e .... EASTERN LAND SURVEY ASSOCIATES, INC. JOB Christopher R. Mello PLS SHEET NO. Z OF� 104 Lowell Street CALCULATED 13Y J ht V rn DATE PEABODY, MA 01960 (978) 531-8121 CHECKED BY DATE • SCALE • I 3 C. Eck �t,AW ,)o.av -r�m%-S_ • i-]uu W^��t.._s 4a1 , C1�= _. Cg�c "9SJ ♦=-)ti,12•fi•\Ib ��G Qll-1 M-1LnJ 4o'i� = •?•-l 'y t 1a �z.fT _ . O,OZ1.... cPS . 4 cj-) cFvs 4 v�ae�cZ k=ruaa-+ acltoJ ,OF -1Z0uF CE1ccc-40\6jat Slr ?� r3•• l2 11 5 CF. • .V S��J.. 1 mac.ctecn E!sS l wtu.G - �QC 2ereu)n Vn4clwwF ti %AS'r yFc� czc: A tCeo np 1, o �JJ,��Oc�.l� 3 42n0 95r °lo' Z �o;S�r Eo°lac ' t a .._...SE ... gyccF ._........ J�t:Y] �U51._, �ceg7_ lJ�•�co� �t"l90 SF 5 °f.Q_° 4 `bsf Osr • t�czc,p4S64(L wnmm�re.i�<mmv�ixai mrM.n 3�I17 EASTERN LAND SURVEY ASSOCIATES, INC. JOB • Christopher R. Mello PLS SHEET NO, t DE A- . 104 Lowell Street CALCULATED BY — \t1 v n DATE PEABODY, MA 01960 • (978) 531-81.21 CHECKED BY� DATE • 5-tof�a.Atze Q" SCALE 745-1 SoSPEaJPo go�t9S TLtmoVe� . INSTRUCTIONS: • Abnaulomvted:Mac 4,2M 1.Sheet is nonaulamaled.print sheet and complete using hand calculations,Column A and 8:See MassDEP Structural BMP Table 2.The calculations must be completed using the Column Headings specified in Chart and Not the Excel Column Headings • -----3.To complete Chart Column D,multiple Column B value within Row x Column C value within Row 4.To complete Chart Column E value,subtract Column D value within Row from Column C within Row • --- -_-'5.Total TSS Removal=Sum Ali Values in Column D • -- Location: 'S-t A B C p E TSS Removal Starting TSS Amount Remaining • BMP' Rate' Load* Removed B*C Load C-D e O CP�tJ f3os..v., 2.5 /e • .......:. " 1.00 •�� V �+ SloM1••reeP-top_ -11% •-�5 :: .. '. . -. ... 0 0 d jH • -..-. r`• Separate Form Needs to IFg Z.l's �a be Completed for Each Total TSS Removal = oWetwBMP Train Project: RWE2Ut6W 4v1t _... • Prepared By aJ rn *Equals remaining load I previous BMP(E) • Date. 11- 1 i-o a which enters the BMP . • Non-automated TSS Calculation Sheetmuetbe used NPmpaetery BMPPropoe d '-"-f.From MassDEP Stom meer Handbook Vol.f < _... • S'10[LmCeP'7brt. SffL4-Gl \OJ _ 2�_r*.R\4 __ i.... Tf;s iia��afc� t.r-n_oee.Vtov� ;..P.4�a ; ..Z•35 , AcngS � Wewocs...... 4R,00s� OF..... • nor, 3.... fj 2...Sop. S aOc�F.. `Me .tt.• P�tiE?cztA4g ,2�. ,_.. • P ^ .. �r=P..... �ncZ.._S�eez �< _-Cofa GS+r_ rvlopE°t- • 3f.00 . �ZC 4t • _.\..Me�mx1.0O$ emPac.r� • C�arrrf re _ 3 0020 i"0 ..._F-to W_"AG W%-7- 40 +-a ...PdS$ zo 01r • OfZtP•ty,p._. C��.........rvlParlJFuc�clteft�... . z•35 ,/mac_ x .-�(a" la- 43, 40 _ xT • lz af .. F'oc rv��•.t waren ..... CJAL�z� Storrnwaer Technology: 0 • Stormceptor (Hydro Conduit, formerly CSR New England Pipe) Pev,,sed ;ebruary 2003 0 The.Starmcentor Fact.Sheet is one in a serlec of fart sheets for stormwater terhnol(Ties and related nerfor- • mance evaluations, which are undertaken by the Massachusetts STrategic Envirotechnology Partnership (STEP). • The STEP evaluation entitled, Technology Assessment, &ormceptor CSR New England Pipe, January 1998 is the 0 information source for this fact sheet.When a more thorough understanding of a system is required,the full Technology • Assessment should be reviewed. Copies are available for downloading from the STEP Web site(www.STEPSITE.org/) • or by contacting the STEP Program(Phone:617/626/1197,FAX:617/626/1180,email:linda benevides state.ma us).This fact sheet is subject to future updates as additional performance information becomes available. Description/Definition Stormceptor is a prefabricated,underground unit that 0 separates oils,grease,and sediment from stormwater • runoff when iasiallcd With an U-Misting orncw pipe • conveyance system.The unit is divided into two cham- bers a treatment and a flow hypass chamber I?n�rg typical storm events,runoff is directed by the inflow weir • through a drop pipe into the lower treatment chamber where sediment, oil, and grease are separated from the flow by gravity.The bypass chamber is designed to erw..weir convey excess stornrwater,which overtops the inflow • weir,through the system without treatment. • Y �fiv n Equipment and Sizing The on-line Stormceptor units are available in eight • sizes ranging from six and twelve feet in diameter with • capacities of 900 to 7200 gallons.Since issuing me STEP assessment in 1998,the manufacturer has expanded the 0 Stormccpturproduct line to include a storm drain inlet • (STC 4501)and three units(Models STC 11000,STC • 13(00,and STC 16000).These systems are,not included Figure 4.Stormce�-operdtion during average in the STEP evaluation.Users and decision-makers may flow conditions. 0 require additional field test results and new data for these Performance /Effectiveness systems in order to accept performance ratings, Per / • particularly if they are higher than those reported in the The system is designed to provide separation of STEP technology assessment and this fact sheet. sedimeut,oil,and grease from stormwater by routing runoff into a low-turbulence environment where solids • Stormceptor units are available in either precast settle and oils float out of solution.The system sizing is concrete or fiberglass for special applications. Concrete based on the drainage area,historical rainfall data,and 0 units are pre-engineered for HS-20 min.traffic loading at the solids removal efficiency required.It is recommended • the surface. Fiberglass units can be used in areas where that the system be used in combination with other • there is a potential for oil and chemical spills. stormwater controls to conform with the Massachusetts Stormwater Management Policy and standards. • fi a • I 3 -t2 An Imperial Model STC 2000(equivalent to theTechnology Status NA-A-1 eT !AA �dmvltvn,Cana`tr ntS nn:i'from - -. . 1 he m Siorceptor system provides greater solids a 9.8 acre commercial parking lot.This system was separation and higher TSS removal efficiencies than oil monitored during four storm events in 1996 and shown to and grit separators. Stormceptor systems are among the • have an average total suspended solids(TSS)removal category of hydrodynamic separators, which are flow- efficiency of 52 percent.In designing a system to achieve through devices with the capacity to settle or separate • a comparable removal efficiency,the relationship be- grit,oil,sediment,or other pollutants from stormwater. • tween system size and impervious drainage area should According to the U.S.Environmental Protection Agency, be considered, as detailed in Table I and the Technology "Hydrodynamic separators are most effective where the Assessment Report. materials to be removed from runoff are heavy particu- lates-which can be settled- or floatables -which can be • A Model STC 1200 in Westwood, Massachusetts captured,rather than solids with poor settleability or treats flow from 0.65 acres consisting of a paved truck dissolvedpollutants." loading area at a manufacturing facility.The unit was • monitored for six storm events in 1997,but only four The field studies evaluated for the STEP assessment • events had measurable TSS influent concentrations. Of predate the Stormwater Best Management Practice these four events, the average TSS removal efficiency Demonstration Tier II Protocol(2001),which is appli- was calculated to be 77 percent,which is less than the 80 cable in Massachusetts and other states in the Technol- • percent removal targeted by the manufacturer. ogy Acceptance Reciprocity Partnership (TARP), to ensure quality controlled studies that can be shared Based on these field monitoring results,and when the unit sizing follows the guidance in Table 1,removal among participating states.Therefore, interstate re rf - ity is not available to the manufacturer,based on peor- rfor- • efficiencies between 52 percent and 77 percent may be mance claims that were evaluated by STEP in 1998. If • achieved where installations have similar rainfall and land the TARP Protocol requirements are fulfilled in the use characteristics as those reviewed for the STEP future, the manufacturer could pursue reciprocal verify-evaluation.It is recommended that additional field re- cation for Stormceptor systems in participating TARP search and new data be evaluated to validate perfor- states.More information on the TARP Protocol is mance ratings higher than those verified by STEP. available on the following Web site:www.dep.state.pa.us/ dep/deputate/pollprev/techsavices/tarp. • Specific performance claims for oil and grease were • not evaluated by STEP. However,total petroleum Applications/Advantages hydrocarbons(TPH)were analyzed during the t r a .:�^a • T^�I id Westwood study.Results indicated that the unit was Stec L__r.,,. syls'tcrs iasCuuu,.0 in _ab.c , should • effective in capturing oils. used in combination with other BMPs to remove 80 percent of the average annual load of TSS (DEP Stormwater Policy Standard 4). Systems may be well • suited for pretreatment in a mixed component system designed for.stormwater recharge. STC 900- _-._-_....^..___.._.-_�� _�=--._ �00.9 + Perfon—mance data show that Stormceptor may provide STC 7200 0.7 1.45 TSS removal rates in the range of 52 percent to 77 • STC 1800 -- _— __--- 125 255 percent when sized according to Table 1.Higher TSS • ------- -- removal rates were achieved during low flow,low in- STC 3600 26 & tensity storms with less than one third of an inch of vninoff. Also,by reducing the impervious drainage area, STC,6000 — 4.6 g relative to the system size,the STEP Technology As- sessment Report indicated that higher removal eificien- Table 1:Sizing for TSS removal (adapted cies may be achievable.However,STEP recommends • from the manufacturer's sizing in the 1998 collection of additional data"representing a varied set • STEP Report) Use the table to determine a TSS removal rate. Use the new Rinker method for sizing of operating conditions over a realistic maintenance • Stormceptor units. The sizing method has been cycle to verify TSS removal rates greater than 80 per- changed since publication of the STEP Report. cent." • Note: To achieve 52% and 77% TSS removal rates • on some sites, it may be necessary to use lower The Stamceptor system is suitable for new and retro- maximum impervious areas than those in Table 1. fit applications.For retrofit applications,it should not 3- >.3 take the place of a catch basin for the systems that averaging$300 to$500. The expected life of a system has • have been verified.Also,for retrofit applications,it should been estimated to be 50 to 100 years. . be installed in lateral lines and not main trunk lines. • 4�- The system is particularly well suited in constricted ar- eas and where space is limited. • � It also is suitable for use in areas ofhigh potential pollut- sic 900 0.5 ant loads(DEP Stormwater Policy Standard 5),where STC 120p - p it may be used effectively in capturing and containing STC 1800 1 • oil and chemical spills. Web site:www.state.ma.us/dep/ - STC 2400 1 • - - - -- . .___ - - -- --�brp%stormwtr/stormpub.htm. _ STC 3600 1.25 __... STC 4800 Considerations/Limitations • # Systems are not expected to provide significant nutrient (nitrogen and phosphorus)or fecal cofifenn removal. 'raMe z;he S`wT^eptor tin out is based or;15 • + The systems are not recommended for use in critical percent of the sediment storage volume in the areas,such as public drinking water supplies,certified Referencesvernal pools,public swimming beaches,shellfish grow- • ing areas,cold water fisher.'es and some Areas of C 4- Winkler E.S.1998."TechnologvAssessment Stormceptor." cal Environmental Concern(ACECs),except as a pre- University of Massachusetts,Amherst,MA. treatment device for BMPs that have been approved STEP Web site: www.STEPSITE.org/ • by DEP for use in critical areas. The structural BMPs • approved for use in critical areas are described in Stan- Massachusetts Department of Environmental Protection and dard 6 of the Stormwater Management Policy, Office of Coastal Zone Management. 1997. "Stormwater www.state.ma.us/dep/brp/stormwtr/storinpub.htnL Management Handbooks,Volumes One and Two."Boston, • MA. Y=ndboviu Feb siie: w'w'w.statc.rna.us/dcp%Drpi There is a limited set of useful data for predicting the storrnwtr/stormpub.htm, relationship between treatment efficiency and loading • rates.Removal efficiencies have not been demonstrated United States Environmental Protection Agency. "Storm • for all unit sizes. Water Technology Fact Sheet Hydrodynamic Separators." + Further research is needed to determine how much TSS EPA 832-F-99-017. bypasses the treatmem chamber during certain,higher Swrmceptor Web sires: www rinkermatertals.comi velocity storm events which recur less frequently. stormceptor + Systems require regular maintenance to mininu the TARP Web site: www.dep.state.pa.us/dep/deputate/ potential for washout of the accumulated sediments. . pollprev/techservices/tarp Reliability/Maintenance All BMPs require scheduled,routine maintenance to • ensure that they operate as efficiently as possible.Al- though maintenance requirements are site specific,a • 0eneral relationship between cleaning needs and depths of .cnt has bccn cs~ablishcd by the manufacturcr. • Inspection of the Stormceptor interior should be done after • major storm events,particularly in the first Year of opera- tion.It is recommended that material in the treatment chamber be pumped out by a vacuum truck semiannually, • or when the sediment and pollutant loads reach about 15 • percent of the total storage.If the unit is used for spill containment,it should be pumped after the event is contained Typical cleaning costs were estimated by the • manufachn-er in 1998 to be$250,with disposal costs 3 _ tA UTATIONS A7IOI. rz% J.a P " c p BasedTupon DBa�t oni1Fo mule j DESIGN �TOI M t c IC.ale-I i QiA I ., ( . 4 i- I i. . . . 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Mello PLS SHEET NO. 104 Lowell Street CALCULATED BY DATE A t-C f • PEABODY, MA 01960 • (978) 5531-8121 CHECKEDDATE • SCALE • vN.oFr CoFF,F� �� _N1 C�av�npV-7AnNoUS, • LV o xDrr.ra��1 trrNPc-RVjw LAJjoscoQ T0'14�l. IC.• Qna-1\OU • •C • • t20C 7U(CFc P26t� 'ARM A9A.4. USED. • 2051 �4 — o OL -44 444 zt.l . .. -40 ,36 -te 4 .q 4 3Jc •'3 22.1 ,.�4 1L)r •9 ]r • az�e, _ 533 8 ...... A �8 • 'Zl$ .__.... ...2'j . Oq.- ---,33 • 2'he ♦.'i }_. 6t k.•.� 1sj..., •33 • 2t� ....._ 2 'j c — » 2S • z5� .� ._ A g �4 • Z�Q. .__- ,23 __.... , tc .. _ .._.''S� .z�.x9 +.�.)�� 3 , . cSa_ cC.. • 203 3 o?- 3i 3ok q a .8C2S 8 c • Drainage Capacity Calculations • Riverview Place-Salem,Ma Sewer Pipes -- English Units • CiW Tools for Windows (11-12-2008, 13:24:40) • Flowrate Diameter Friction Slope Velocity (cfs) (in) O M (fps) • 2.31 12.00 0.011 0.30 2.94 2.73 12.00 0.011 0.42 3.47 . 4.45 15.00 0.011 0.34 3.63 4.83 15.00 0.011 0.40 3-.93 • 2.92 12.00 0.011 0.48 3.71 • 2.56 12.00 0.011 0.37 3.26 6.36 12.00 0.011 2-28 8.10 • 5.40 15-00 0.011 0.50 4.40 12.41 18.00 0.011 1.00 7.03 • 16.91 24.00 0.011 0.40 5.38 • • • • • • • • • • • • • • • • • • • 0 3-te • * DRAINAGE &SEWERAGE-HYDRAULIC COMPUTATIONS-5 • • _ a- Cross- sectional For pipes Full — —_ - ores of waterway — or heft-full • — ps wetted perimeter 3 R = 4 • R � P =Hydraulic radius_ 0 SECTION OF ANY OPEN CHANNEL SECTION OF CIRCULAR PIPE • V=Average or ineon velocity in reefper second • Q = a V-Discliarge of pipe or channel in cubic feef per second (c. .A.5.). • n = Coefficient of roughness ofpipe or channel surFoce , see Table A-R,J./8-68. 5 =Slope of f/ydrou/ic Gradient (woier surfbce in open chonns/s oi-pipes not • under pressure, same os slope of channel or pipe invert only when j"/ow %S uni/orm in constant section. FIG. A- HYDRAULIC ELEMENTS OF CHANNEL 5ECTION S. � ,00 90 t 80 . Z 70 m U a60 v • O 50 • 4- 40 • LL aaio • 30 004 AIC, n' 20 o • 10 i • o . O to 90 30 40 50 - 60 70 80 90 100 Ib 120 HYDRAULIC ELEMENTS PER CENT OF VALUE _ FOR FULL SECTION (APPROXIMATE) • E AMP E: Given: Disehorge -717cyls. through o pipe which hos eapor My f/owing fu// • of/S C.f.S. of o ve/o city of 7.0 f.4.per sec. Reyuinrd to nog Y A Q a /2 e.f.s. Pereenfegr offal/ discharge - - 8O , Ehler chorf of 80% of too/ue • o6rful/-secliar, of Hydroa/ie F/en7enf5, hied Y-A?5%x7-7.9 ff per sec. * FIG.5-VALUES OF HYDRAULIC ELEMENTS OF CIRCULAR SECTION mk FOR VARIOUS DEPTHS OF FLOW. • 3 �q - S of s _ r SECTION 4 ADDITIONAL SUBMISSIONS • • • • • • • • • • • DRAFT STORMWATER POLLUTION PREVENTION PLAN • i • • � i L • • • • • • • • • • • • • • • • i • Notes regarding draft NPDES SWPPP Riverview Place—Salem, MA. Sections to be addressed following selection of a General Contractor: . 1.2 • 5.1.1 5.2 6.1 6.3 8 Appendices: Appendix B—Will be the 8 sheet Site Development Permit Plan Appendix C—Most recent version will be attached following filing of NPDES NOI • Appendix D—Will be added once NPDES Notice of Intent is filed and acknowledged Stormwater Pollution Prevention Plan(SWPPP) • INSERT PROJECT NAME and DA IT SECTION 1 : SITE EVALUATION, ASSESSMENT, AND PLANNING • 0 1.1 Project(Site Information 0 • Instructions: • — In this section,you can gather some basic site information that will be helpful to you later when you file for permit coverage. 0 — For more information,see Developing Your Stonnwater Pollution Prevention Plan:A SWPPP Guide for Construction Sites(also known as the SWPPP Guide),Chapter 2 — Detailed information on determining your site's latitude and longitude can be found at • wvm.eoa.gov/npdesistormwater/latlong • Project/Site Name: Riverview Place • Project Street/Location: 72 Flint Street, 67 and 71 Mason St. • City: Salem State: MA ZIP Code: 01970 • County or Similar Subdivision: Essex County • Latitude/Longitude (Use one of three possible formats, and specify method) • Latitude: Longitude: • 1. __° "N (degrees, minutes, seconds) 1. __°__'__" W(degrees, minutes, • seconds) 2. __° N (degrees, minutes, decimal) 2. __°__. W (degrees,minutes, decimal) 0 3. 42. 5205 °N (decimal) 3. 70 . 9675 °W(decimal) • Method for determining latitude/longitude: 0 X USGS topographic map (specify scale: 1:25.000 ) ❑ EPA Web site ❑ GPS • ❑ Other(please specify): Is the project located in Indian country? X Yes ❑No If yes, name of Reservation, or if not part of a Reservation, indicate "not applicable." Is this project considered a federal facility? ❑ Yes X No • NPDES project or permit tracking number*: • *(This is the unique identifying number assigned to your project by your permitting authority after you have applied for coverage under the appropriate National Pollutant Discharge Elimination System(NPDES) construction general • permit.) • • EPA SWPPP Template, Version 1.1, September 17, 2007 1 r 0 • Stormwater Pollution Prevention Plan(SWPPP) INSERTPROJECT NATE and DA FE 1.2 Contact Information/Responsible Parties • Instructions: . — List the operator(s), project managers,stormwater contact(s),and person or organization that prepared the SWPPP. Indicate respective responsibilities, where appropriate. — Also, list subcontractors expected to work on-site. Notify subcontractors of stonnwater requirements applicable to their work. • — See SWPPP Guide, Chapter 2.8 and EPA's Construction General Permit(CGP) Part 3,Subparts 3.2, . 3.3.A,and 3A.A. Operator(s): Insert Company or Organization Name: Riverview Place LLC Insert Name: Michael O'Brien Insert Address: 6 Cider Mill Road Insert City, State, Zip Code: Peabody, MA. 01960 • Insert Telephone Number: 978-979-4072 • Insert Fax/Email: Insert area of control (if more than one operator at site): . Repeat as necessary Project Manager(s) or Site Supervisor(s): • Insert Company or Organization Name: To Be Determined w Insert Name: Insert Address: Insert City, State, Zip Code: • Insert Telephone Number: Insert Fax/Email: Insert area of control (if more than one operator at site): Repeat as necessary • SWPPP Contact(s): • Insert Company or Organization Name: To Be Determined . Insert Name: Insert Address: Insert City.. State, Zip Code: Insert Telephone Number: hisert Fax/Email • Insert area of control (if more than one operator at site): . Repeat as necessary EPA SWPPP Template, Version 1.1, September 17,2007 2 • Stormwater Pollution Prevention Plan(SWPPP) INSERT PROJECTNAME and DATE ! This SWPPP was Prepared by: Insert Company or Organization game: Eastern Land Survey Associates, Inc. • Insert Name: James H. MacDowell, Clayton A. Morin, PE Insert Address: 104 Lowell St. Insert City, State, Zip Code: Peabody, MA. 01960 Insert Telephone Number: 978-531-8121 Insert Fax/Email: 978-531-5920 iSubcontractor(s): • Insert Company or Organization Name: To Be Determined Insert Name: Insert Address: Insert City, State,Zip Code: Insert Telephone Number: • Insert Fax/Email: Repeat as necessary Emergency 24-Hour Contact- Insert Company or Organization Name: To Be Determined Insert Name: • Insert Telephone Number: 1.3 Nature and Sequence of Construction Activity Instructions: — Briefly describe the nature of the construction activity and approximate time frames(one or more paragraphs,depending on the nature and complexity of the project). • — For more information,see SWPPP Guide,Chapter 3.A.and EPA's CGP Part 3, Subparts 3.3.13.1 and 2, . and 3A.A. • Describe the general scope of the work for the project, major phases of construction, etc: ! The proposed site activities will consist of the following: • Demolition of existing industrial buildings and removal of demolition debris to approved locations. • Final testing of on site soils and remediation in accordance with applicable Federal, State and Local regulations. . • Site preparation, grading, driveway,parking area, utility and building construction for a • 130 unit multi-family residential facility to be located within three buildings. S EPA SWPPP Template, Version 1.1, September 17, 2007 3 s • • Stormwater Pollution Prevention Plan(SWPPP) INSERT PROJECT NAME and DA`T"E • • The project is expected to require two years to complete once construction has commenced. What is the function of the construction activity? X Residential ❑ Commercial ❑ Industrial ❑ Road Construction ❑ Linear Utility • ❑ Other(please specify): • Estimated Project Start Date: 09/ 01 /2008 • Estimated Project Completion Date: 09 /01 / 2010 1.4 Soils, Slopes, Vegetation, and Current Drainage Patterns • Instructions: • — Describe the existing soil conditions at the construction site including soil types, slopes and slope lengths, drainage patterns,and other topographic features that might affect erosion and sediment control. — Also, note any historic site contamination evident from existing site features and known past usage of the • site. — This information should also be included on your site maps(See SWPPP Guide, Chapter 3.C.). • — For more information,see SWPPP Guide,Chapter 3.A and EPA's CGP Part 3, Subpart 3.3.C. I� • • Soil type(s): Urban UR • • Slopes (describe current slopes and note any changes due to grading or fill activities): • Existing 0-15%, Proposed 1-15%,terracing due to new site design. • • Drainage Patterns (describe current drainage patterns and note any changes dues to grading or fill • activities): Overland north to south into North River existing. Proposed—a new drainage collection and treatment system will be constructed. • • Vegetation: Sparse in existing condition—site is primarily covered by buildings and industrial • yard areas. • • Other: Site has been used for a variety of industrial activities since the 1800's. • • • • • • • EPA SWPPP Template, Version 1.1, September 17, 2007 4 • • • Stormwater Pollution Prevention Plan(SWPPP) • INSERT PROJECTNAME and DATE 1.5 Construction Site Estimates • Instructions: • — Estimate the area to be disturbed by excavation,grading,or other construction activities, including dedicated off-site borrow and fill areas. — Calculate the percentage of impervious surface area before and after construction — Calculate the runoff coefficients before and after construction. — For more information,see SWPPP Guide,Chapter 3.A and EPA's CGP Part 3, Subpart U.B. • The following are estimates of the construction site: Total project area: 4.3 acres Construction site area to be disturbed: 4.2 acres Percentage impervious area before construction: 82 % Runoff coefficient before construction: 95 Percentage impervious area after construction: 70 % Runoff coefficient after construction: 94 1.6 Receiving Waters • Instructions: • — List the waterbody(s)that would receive stonnwater from your site,including streams, rivers, lakes,coastal waters, and wetlands. Describe each as cleady as possible,such as Mill Creek, a tributary to the Potomac River,and so on. — Indicate the location of all waters,including wetlands,on the site map.For more information,see EPA's • CGP Part 3,Subparts 3.3.8.4 and 3.3.C.6. — Note any stream crossings,if applicable. — List the storm sewer system or drainage system that stormwater from your site could discharge to and the waterbody(s)that it ultimately discharges to. • — If any of the waterbodies.above are impaired and/or subject to Total Maximum Daily Loads(TMDLs), . please list the pollutants causing the impairment and any specific requirements in the TMDL(s)that are applicable to construction sites. Your SWPPP should specifically include measures to prevent the • discharge of these pollutants. For more information,see EPA's CGP Part 1, Subpart 1.3.C.5 and Part 3, Subpart 3.14. — For more information,see SWPPP Guide,Chapter 3.A and 3.B. — Also,for more information and a list of TMDL contacts and links by state,visit www.epa.gov/npdes/stormwater/tmdl. Description of receiving waters: North River(tidal reach in an open canal). • Description of storm sewer systems: None in existing condition. A full collection and treatment • system will be constructed. EPA SWPPP Template,Version 1.1, September 17,2007 5 Stormwater Pollution Prevention Plan(SWPPP) 11114 1 MINE MM111;• INSER CPROJECr NAME- and DATE Description of impaired waters or waters subject to TMDLs: None listed on Massachusetts website. S Other: 1.7 Site Features and Sensitive Areas to be Protected Instructions: — Describe unique site features including streams, stream buffers, wetlands,specimen trees, natural vegetation,steep slopes,or highly erodible soils that are to be preserved. — Describe measures to protect these features. . — Include these features and areas on your site maps. • — For more information,see SWPPP Guide, Chapter 3.A and 3.B. Description of unique features that are to be preserved: Bank of the North River. Describe measures to protect these features: Install erosion control prior to commencement of any.sitework as depicted on the site plan. 1.8 Potential Sources of Pollution Instructions: • — Identify and list all potential sources of sediment,which may reasonably be expected to affect the quality of stormwater discharges from the construction site. — Identify and list all potential sources of pollution,other than sediment,which may reasonably be expected • to affect the quality of stormwater discharges from the construction site. • — For more information,see SWPPP Guide, Chapter 3.A and EPA's CGP Part 3, Subpart 3.1.B. Potential sources of sediment to stormwater runoff. • Exposed earth areas during construction, stockpiles, newly graded areas. • Potential pollutants and sources, other than sediment, to stormwater runoff: INSERT TEXT OR USE TABLE BELOW • EPA SWPPP Template, Version 1.1, September 17, 2007 6 • Stormwater Pollution Prevention Plan(SWPPP) I\SERT PROJECT NAME and DA(E FROM IMF;IN1191 R_ "F11111111111 F I 3911131101W ---- • Trade Name Material Stormwater Pollutants Location • Portable Toilets Bacteria, Parasites,Viruses Staging Area Fertilizer Nitrogen,Phosphorous Newly Seeded Areas Asphalt Oil,Petroleum, Distillates Parking Lots and Driveways Concrete Lime,Sand,PH,Chromium Building,Foundations, Walks . Glue, Adhesives Polymers, Epoxies Construction Building • Gasoline Benzene, Ethyl Benzene,Toluene, Staging Area • Xylene,MTBE Diesel Fuel Petroleum Distillate,Oil and Staging Area Grease,Naphthalene,Xylenes g g Hydraulic Oil/Fluids Mineral Oil Staging Area Antifreeze/Coolant Ethylene Glycol,Propylene Glycol, Heavy Metals Staging Areas • 1.9 Endangered Species Certification Instructions: — Before beginning construction,determine whether endangered or threatened species or their critical • habitats are on or near your site. • — Adapt this section as needed for state or tribal endangered species requirements and, if applicable, document any measures deemed necessary to protect endangered or threatened species or their critical habitats. — For more information on this topic,see SWPPP Guide, Chapter 3.13 and EPA's CGP Part 1 Subpart • 1.3.C.6 and Appendix C. — Additional information on Endangered Species Act(ESA)provisions for EPA's Construction General Permit is at www,epa.gov/npdes/storrnwater/esa Are endangered or threatened species and critical habitats on or near the project area? ❑ Yes E No Describe how this determination was made: Massachusetts Natural Heritage Database, 2007. • If yes, describe the species and/or critical habitat: • INSERT TEXT HERE EPA SWPPP Template, Version 1.1, September 17, 2007 7 r • • • Stormwater Pollution Prevention Plan(SWPPP) • IN'SERI PROJECT NANME and DATE -------_.Pip- . __.._.._ _-_., • If yes, describe or refer to documentation that determines the likelihood of an impact on • identified species and/or habitat and the steps taken to address that impact. (Note, if species are on or near your project site, EPA strongly recommends that the site operator work closely with • the appropriate field office of the U.S. Fish and Wildlife Service or National Marine Fisheries • Service. For concerns related to state or tribal listing of species,please contact a state or tribal • official.) • INSERT TEXT HERE • • 1.10 Historic Preservation • • Instructions: • — Before you begin construction,you should review federal and any applicable state,local,or tribal historic • preservation laws and determine if there are historic sites on or near your project. If so,you might need to make adjustments to your construction plans or to your stormwater controls to ensure that these historic • sites are not damaged. • — For more information,see SWPPP Guide,Chapter 3.6 or contact your state or tribal historic preservation • officer. • • Are there any historic sites on or near the construction site? • ❑ Yes ® No • Describe how this determination was made: • Consultation with local Historical Association. • If yes, describe or refer to documentation that determines the likelihood of an impact on this historic site and the steps taken to address that impact. • INSERT TEXT HERE • • • 1.11 Applicable Federal, Tribal, State or Local Programs • • Instructions: • — Note other applicable federal,tribal,state or local soil and erosion control and stonnwater management • requirements that apply to the construction site. See EPA's CGP Part 3.9. INSERT TEXT HERE • • • • • EPA SWPPP Template, Version 1.1, September 17, 2007 g - • • • Stormwater Pollution Prevention Plan(SWPPP) INSERT PROJECT NAME,and DATE 1.12 Maps • Instructions: • — Attach site maps. For most projects,a series of site maps is recommended. The first should show the undeveloped site and its current features. An additional map or maps should be created to show the developed site or for more complicated sites show the major phases of development. These maps should include the following: — Direction(s)of stormwater flow and approximate slopes before and after major grading activities; — Areas and timing of soil disturbance; . — Areas that will not be disturbed; • — Natural features to be preserved; — Locations of major structural and non-structural BMPs identified in the SWPPP; — Locations and timing of stabilization measures; — Locations of off-site material,waste,borrow,or equipment storage areas; • — Locations of all waters,including wetlands; • — Locations where stormwater discharges to a surface water, • — Locations of stone drain inlets;and — Areas where final stabilization has been accomplished. — For more information,see SWPPP Guide,Chapter 3.0 and EPA's CGP Part 3,Subparts 3.1.B.1 and • 3.3.C. Include the site maps with the SWPPP. EPA SWPPP Template, Version 1.1, September 17, 2007 9 • • • - Stormwater Pollution Prevention Plan(SWPPP) INSERT PROJECT NAME and DATE ! • SECTION 2: EROSION AND SEDIMENT CONTROL BMPS • • Instructions: ! — Describe the BMPS that will be implemented to control pollutants in stonnwater discharges. For each • major activity identified,do the following • ✓ Clearly describe appropriate control measures. • ✓ Describe the general sequence during the construction process in which the measures will be implemented. ! ✓ Describe the maintenance and inspection procedures that will be used for that specific BMP. • ✓ Include protocols,thresholds, and schedules for cleaning, repairing,or replacing damaged or failing BMPS. • ✓ Identify staff responsible for maintaining BMPS. ! ✓ (If your SWPPP is shared by multiple operators, indicate the operator responsible for each BMP.) • — Categorize each BMP under one of the following 10 areas of BMP activity as described below: • 2.1 Minimize disturbed area and protect natural features and soil • 2.2 Phase Construction Activity 2.3 Control Stormwater flowing onto and through the project • 2.4 Stabilize Soils • 2.5 Protect Slopes • 2.6 Protect Storm Drain Inlets • 2.7 Establish Perimeter Controls and Sediment Barriers 2.8 Retain Sediment On-Site and Control Dewatering Practices 2.9 Establish Stabilized Construction Exits • 2.10 Any Additional BMPs • — Note the location of each BMP on your site map(s). • — For any structural BMPs, you should provide design specifications and details and refer to them.Attach • them as appendices to the SWPPP or within the text of the SWPPP. — For more information,see SWPPP Guide,Chapter 4 and EPA's CGP Part 3,Subparts 3.3.8.2 and 3A A- • D,and Part 4,Subpart 4.5. • — Consult your state's design manual or one of those listed in Appendix D of the SWPPP Guide. • — For more information or ideas on BMPs,see EPA's National Menu of BMPS http://www.epa.gov/nodes/stormwaterlmenuotbmps • • • • • • • • EPA SWPPP Template,Version 1.1, September 17, 2007 10 ! ! Stormwater Pollution Prevention Plan(SWPPP) INSERT PROJECT NAME and DATE 2.1 Minimize Disturbed Area and Protect Natural Features and Soil Instructions: — Describe the areas that will be disturbed with each phase of construction and the methods(e.g.,signs, fences)that you will use to protect those areas that should not be disturbed. Describe natural features • identified earlier and how each will be protected during construction activity.Also describe how topsoil will • be preserved. Include these areas and associated BMPs on your site map(s)also. (For more information, see SWPPP Guide, Chapter 4, ESC Principle 1.) — Also,see EPA's Preserving Natural Vegetation BMP Fact Sheet at • www.epa.govinpdeslstormwater/menuofbmps/construction/oerserve veci Existing Features—With the exception of a foot wide strip along the easterly boundary, virtually all of the site clearing and preparation will be done at once as a result of the need for demolition • of the existing buildings and anticipated remediation measures. BMP Description—The area of existing vegetation to be preserved is delineated on the site plan in Appendix B. The area will be marked in the field prior to commencement of demolition work by temporary plastic orange mesh fencing. Perimeter trees which are to be preserved will be • clearly marked with a distinct color of surveyor's plastic ribbon. Construction equipment and • vehicles will be kept out of areas to be preserved. Installation Schedule—Areas of existing vegetation to be preserved shall be delineated with • orange mesh fence and trees marked with surveyor's ribbon prior to commencement of • demolition. Maintenance and Inspection—Areas of vegetation preservation shall be inspected weekly to determine stability of delineation fencing and tree marking. • Responsible Staff— Topsoil-Minimal topsoil is anticipated to exist on site and evidenced by existing development. BMP Description—Any topsoil stripped from areas of proposed construction shall be stockpiled • in the project staging area for screening, testing, and if clean, re-use on the site. Stockpiles will . be kept out of areas of concentrated runoff flow and protected from erosion by perimeter silt • fencing. Stockpile surfaces shall be roughened by equipment tracking. Installation Schedule—Topsoil stockpiles shall be established in the project staging area as site • grading proceeds. Stockpiles will be protected with temporary erosion controls, once placed. Maintenance and Inspection—Stockpile areas will be inspected weekly and following storm events. Any observed areas of erosion shall be stabilized immediately. • EPA SWPPP Template, Version 1.1, September 17, 2007 11 • - Stormwater Pollution Prevention Plan(SWPPP) • INSERT PROJECT NAME and DATE ---. . — —._ • Responsible Staff: 2.2 Phase Construction Activity f♦ Instructions: — Describe the intended construction sequencing and timing of major activities, including any opportunities for phasing grading and stabilization activities to minimize the overall amount of disturbed soil that will be subject to potential erosion at one time. Also,describe opportunities for timing grading and stabilization so that all or a majority of the soil disturbance occurs during a time of year with less erosion potential(i.e., • during the dry or less windy season). (For more information,see SWPPP Guide, Chapter 4, ESC Principle 2.)It might be useful to develop a separate, detailed site map for each phase of construction. — Also, see EPA's Construction Sequencing BMP Fact Sheet at hftp I/www epa gov/npdest'stormwaterlmenuofbmps/construction/cons seq) • Given the necessity of complete demolition of existing buildings on site, the small size of the site (4.3 acres) and the interrelationship of the various site improvements, phasing of construction in Riverview Place is not considered as a practical BMP. 2.3 Control Stormwater Flowing onto and through the Project + Instructions: • — Describe structural practices(e.g.,diversions,berms,ditches, storage basins)including design specifications and details used to divert flows from exposed soils, retain or detain flows,or otherwise limit runoff and the discharge of pollutants from exposed areas of the site. (For more information,see SWPPP Guide, Chapter 4, ESC Principle 3.) • Grading characteristics of the site are such that small quantities of runoff may enter the site from the industrial site located east of the site and residential properties north and west of the site. • BMP Description: Existing swale near easterly property line. The existing swale receives runoff + from a portion of the Mason Realty Trust site, located east of Riverview Place. Immediately following demolition activities, the swale will be cleaned of debris and deadfall and maintained in perpetuity. The inlet end outlet pipe (outlet is visible in the wall of the North River Canal) • will be located and cleaned. A headwall will be installed, if appropriate. • Installation Schedule: The west side of the swale will be protected with a silt barrier • prior to commencement of other work on site. Following • demolition, the swale will be cleaned of any accumulated debris and deadfall, the inlet to the drain pipe located and the drain cleaned. w Maintenance and The swale will be inspected weekly and following storm events. . Inspection: Any debris or sediment buildup will be removed from the swale. • Responsible Staff: EPA SWPPP Template,Version 1.1, September 17, 2007 12 Stormwater Pollution Prevention Plan(SWPPP) • INSERT PROJEC['NAME and DATE -------- ------ ---.. --- — - - --., -- ._.. --- -- BMP Description: Diversion swale northwest and west portion of site. A diversion Swale will be constructed along the northwest and west boundaries of the site to intercept runoff from existing residential properties on Mason and Flint Streets. The Swale will be maintained until the • onsite drainage system is constructed and operating. The swale will be routed through an on-site • sediment basin prior to discharge into the North River. • Installation Schedule: The diversion swale will be installed prior to commencement of • sitework in the west portion of the site. Maintenance and The diversion swale will be inspected weekly and following Inspection: storm events. Any debris will be removed. If any breaches develop in the swale embankment, they will be repaired • immediately. Responsible Staff: Repeat as needed 2.4 Stabilize Soils • Instructions: — Describe controls(e.g., interim seeding with native vegetation, hydroseeding)to stabilize exposed soils where construction activities have temporarily or permanently ceased. Also describe measures to control • dust generation.Avoid using impervious surfaces for stabilization whenever possible. (For more • information,see SWPPP Guide, Chapter 4, ESC Principle 4, EPA's CGP Part 3,Subpart 3.13.D.) — Also,see EPA's Seeding BMP Fact Sheet at • www.epa.govinpdes/stormwater/menuofbmps/construction/seeding BMP Description: Hydroseeding will be utilized for temporary stabilization of any areas where • construction is to be ceased for more than 14 days. The hydroseed mix shall consist of wood fibers, seed (slope mix) fertilizer and stabilizing emulsion. Application rates shall be at a rate of 8 lbs. per acre. Seeding will be performed at times of the year when vegetation is more likely to be established. Any areas requiring winter stabilization shall be hydroseeded no later than . October I" • ❑Permanent ® Temporary • Installation Schedule. Temporary stabilization will be applied to areas of the site where • activity will temporarily cease for more than 14 days. Maintenance and Stabilized areas shall be inspected weekly and following storm Inspection: events. Until dense vegetation has established, any bare areas shall be reseeded, fertilized and mulched or re-hydroseeded. Responsible Staff: EPA SWPPP Template, Version 1.1, September 17, 2007 13 Stormwater Pollution Prevention Plan(SWPPP) • INSERT PROJECT NAME and DA"rE ___. _.__P11,11111.1, 111 P F Pill_11m..Rim_._...__.R • BMP Description: Permanent stabilization shall be done upon final grading of soil-surfaced • landscaped areas, but in no case more than 14 days after completion following placement and • grading of topsoil. Final seeding of lawn areas shall be done mechanically. Seed mix shall be as specified by the landscape architect. Trees and shrubs shall be native, non-invasive species and shall be installed . in accordance with the nursery suppliers recommendations. ! ® Permanent ❑ Temporary • Installation Schedule: Permanent stabilization shall be done within 14 days following . the completion of all other site activities, except final paving. • Maintenance and All newly landscaped areas shall be inspected weekly and Inspection: following storm events. Any areas of failure shall be re- landscaped immediately. Permanently stabilized areas shall be monitored until final stabilization is attained. • Responsible Staff. BMP Description: Dust shall be controlled by wetting with water using a pressure distribution truck or sprinklers. Only potable water shall be used, the source of which shall be approved by the City of Salem. The typical application rate shall be 500 gallons per acre and minimized to • avoid ponding or runoff generation. ❑Permanent ® Temporary . Installation Schedule: Dust control will be performed as needed during site grading • operations and during dry windy conditions (actual or forecast • winds of greater than 20 miles per hour). Spraying of potable water shall not be done more than 3 times daily in June- September nor more than once daily at other times unless site or • climatic conditions demand otherwise. • Maintenance and At least one pressure distribution dewatering truck or trailer shall • Inspection: be kept on site. The unit shall have a positive shutoff valve to prevent excessive watering. Responsible Staff.• 2.5 Protect Slopes • Instructions: • — Describe controls(e.g.,erosion control blankets,tackifiers)including design specifications and details that will be implemented to protect all slopes. (For more information,see SWPPP Guide,Chapter 4, ESC Principle 5.) — Also,see EPA's Geotextiles BMP Fact Sheet at . www.epa.goWnpdes/stormwater/menuofbmps/construction/oeotextiles EPA SWPPP Template, Version 1.1, September 17, 2007 14 • • Storrawater Pollution Prevention Plan(SWPPP) • INSERT PROJECT NAME and DATE BMP Description: Geotextile erosion control blankets will be used to stabilize slopes in areas which are steeper than 3 to 1 and proposed to be grassed surface. The entire slope shall be • covered with the blanket following final grading and installation of seed, fertilizer and mulch. • The leading edge of the blanket will be anchored in a 12 inch deep by 6 inch wide trench on the • uphill side of the slope. The blanket will be rolled slowly downslope and stapled at 12 inch intervals. If multiple blankets are used, they shall be overlapped a minimum of two inches and • stapled along the overlapped edge. • • If there are conflicts between the above installation procedures and the manufacturer's • recommendations, the manufacturer's procedures shall be followed. . Installation Schedule: Erosion control blankets shall be installed once slopes have been • graded and seeded. Maintenance and Erosion control blankets shall be inspected weekly and • Inspection: immediately following storm events. If any cracks,tears or breaches are observed, the section shall be repaired or replaced • immediately. Any areas where the blanket is not in close contact • with the ground will be repaired or replaced. Inspection and maintenance will continue until permanent vegetative • stabilization of the slope has occurred. Responsible Staff.• • •. BMP Description: Installation Schedule: • Maintenance and • Inspection: • Responsible Staff.• Repeat as needed • 2.6 Protect Storm Drain Inlets • Instructions: — Describe controls(e.g., inserts, rock-filled bags,or block and gravel)including design specifications and • details that will be implemented to protect all inlets receiving stonnwater from the project during the entire project. (For more information, see SWPPP Guide, Chapter 4, ESC Principle 6.) • — Also,see EPA's Storm Drain Inlet Protection BMP Fact Sheet at www.epa.00v,lnodes/stormwater/menuofbmps/construction/storm drain • • • • • • EPA SWPPP Template, Version 1.1, September 17, 2007 15 • • Stormwater Pollution Prevention Plan(SWPPP) . INSERT PROJECT NAME and DA FE • • BMP Description: Storm Drain Inlet Protection prior to Paving. A siltation barrier shall be • placed around catch basin inlets. The barrier will consist of properly anchored silt socks or stone filters. As an alternative, an impervious membrane may be installed beneath the catch basin grating. Installation Schedule. Once catch basins have been constructed, a silt barrier shall be installed around each one until pavement base course has been placed. Maintenance and See Section 2,Part 2.7. • Inspection: • Responsible Staff.• BMP Description: Storm Drain Inlet Protection after Pavement Construction. Silt barriers made of filter stone or silt socks shall be installed to protect each catch basin. Installation Schedule: Silt protection shall be installed once the base course of pavement • has been constructed and removed just prior to installation of the • top course of pavement.' • Maintenance and Silt protection BMP's will be inspected weekly and immediately Inspection: following storm events. If external barriers are used, silt will be removed when it reaches 1/3 the height(or capacity) of the . barrier. Responsible Staff.• 2.7 Establish Perimeter Controls and Sediment Barriers Instructions: — Describe structural practices(e.g., silt fences or fiber rolls)including design specifications and details to • filter and trap sediment before it leaves the construction site. (For more information,see SWPPP Guide, • Chapter 4, ESC Principle 7.) — Also see, EPA's Silt Fence BMP Fact Sheet at www.epa.00v/nodes/stormwater/menuofbmps/construction/silt fences or Fiber Rolls BMP Fact Sheet at • www.epa.gov/npdes/stormwater/menuofbmps/construction/fiber rolls • BMP Description: Silt Fence. Silt fences shall be installed around the area of proposed work as shown on the Site Plan in Appendix B and around stockpiles of soil. The silt fence shall consist of staked haybales and fabric silt fence as detailed on Sheet 8 of the Site Plan. Installation Schedule: The silt fences shall be installed wherever feasible prior to commencement of demolition. Any sections of silt fence • damaged during demolition shall be replaced immediately. Silt fence shall be installed around soil stockpiles immediately after their placement. • EPA SWPPP Template, Version 1.1, September 17, 2007 16 ' Stormwater Pollution Prevention Plan(SWPPP) • INSERT PROJECT NAME and DATE • Maintenance and Silt fences will be inspected weekly and immediately following Inspection: storm events to ensure that it is stable and functioning as intended. Any gaps or tears in the fabric fence shall be repaired immediately. When sediment reaches one-third the height of the • silt fence, it shall be removed and disposed of lawfully. Prior to removal of silt fences from the site, all sediment shall be removed. It is likely that the silt fence will require replacement • every 12 to 18 months. . Responsible Staff.• BMP Description: • Installation Schedule: i Maintenance and Inspection: Responsible Staff.• Repeat as needed 2.8 Retain Sediment On-Site Instructions: — Describe sediment control practices(e.g.,sediment trap or sediment basin), including design specifications and details(volume,dimensions,outlet structure)that will be implemented at the • construction site to retain sediments on-site. (For more information,see SWPPP Guide, Chapter 4, ESC Principle 8 or EPA's CGP Part 3.13.E.) — Also, see EPA's Sediment Basin BMP Fact Sheet at • www.epa.gov/nodes/stormwater/menuofbmos/construction/sediment basins BMP Description: Installation Schedule: Maintenance and • Inspection: • Responsible Staff.• BMP Description: • Installation Schedule: Maintenance and Inspection: Responsible Staff: • EPA SWPPP Template, Version 1.1, September 17, 2007 17 Stormwater Pollution Prevention Plan(SWPPP) INSERT PROJECT NAME and DA"I E • Repeat as needed 2.9 Establish Stabilized Construction Exits Instructions: — Describe location(s)of vehicle entrance(s)and exit(s), procedures to remove accumulated sediment off- site(e.g., vehicle tracking),and stabilization practices(e.g.,stone pads or wash racks or both)to minimize off-site vehicle tracking of sediments and discharges to stormwater.(For more information,see SWPPP Guide, Chapter 4, ESC Principle 9 and EPA's CGP Part 3, Subparts 3AG and 3.13.6.) . — Also,see EPA's Construction Entrances BMP Fact Sheet at • www.epa.gov/nodes/stormwater/menuofbmps/construction/cons entrance BMP Description: • Installation Schedule: • Maintenance and Inspection: Responsible Staff. BMP Description: Installation Schedule: Maintenance and . Inspection: • Responsible Staff.• Repeat as needed 2.10 Additional BMPs • Instructions: • — Describe additional BMPs that do not fit into the above categories. . BMP Description: • Installation Schedule: • Maintenance and . Inspection: • Responsible Staff.- BMP Description: EPA SWPPP Template, Version 1.I, September 17, 2007 18 Stormwater Pollution Prevention Plan(SWPPP) • INSER'l PROJECT NAME and DAI E 1110111 IN I I ZZ 31111 F • Installation Schedule: Maintenance and Inspection: Responsible Staff: Repeat as needed SECTION 3: GOOD HOUSEKEEPING BMPS • Instructions: — Describe the key good housekeeping and pollution prevention(P2)measures that will be implemented to control pollutants in stormwater. • — Categorize each good housekeeping and pollution prevention(P2)BMP under one of the following seven categories: 3.1 Material Handling and Waste Management 3.2 Establish Proper Building Material Staging Areas 3.3 Designate Washout Areas • 3.4 Establish Proper EquipmentNehicle Fueling and Maintenance Practices • 3.5 Allowable Non-Stormwater Discharges and Control EquipmenWehicle Washing 3.6 Spill Prevention and Control Plan 40 3.7 Any Additional BMPs 0 — For more information,see SWPPP Guide, Chapter 5 and EPA's CGP Part 3: Subparts 3.4.(F), (G), (H), • and(1). . — Consult your state's design manual or resources in Appendix D of the SWPPP Guide. — For more information or ideas on BMPs,see EPA's National Menu of BMPs hnp://www.epa.gov/nodes/stormwater/menuofbmps 3.1 Material Handling and Waste Management Instructions: . — Describe measures(e.g., trash disposal,sanitary wastes, recycling,and proper material handling)to . prevent the discharge of solid materials to receiving waters,except as authorized by a permit issued under section 404 of the CWA(For more information,see SWPPP Guide, Chapter 5, P2 Principle 1.) — Also, see EPA's General Construction Site Waste Management BMP Fact Sheet at • www.epa.gov/npdes/stormwater/menuofbmps/construction/cons wasteman EPA SWPPP Template,Version 1.1, September 17, 2007 19 ` Stormwater Pollution Prevention Plan(SWPPP) • I;\'SERI PROJECT NAME and DATE; S BMP Description: All waste materials will be gathered daily and disposed of into metal trash dumpsters located on site. Only construction debris and trash shall be deposited in dumpsters. All construction personnel will be instructed as to the permitted procedures for waste material disposal. The procedures shall be posted in writing at the site superintendent's office trailer. The site superintendent shall be responsible for seeing that practices are followed. . Installation Schedule: Trash dumpsters shall be installed as soon as work has commenced. w Maintenance and The dumpsters will be inspected weekly and immediately Inspection: following storm events. Dumpsters shall be emptied weekly by private contractor and disposed of at an approved location. If • trash load exceeds this schedule, dumpsters will be emptied more frequently. . Responsible Staff.- Site Superintendent BMP Description: Hazardous Waste. Any hazardous waste materials such as oil filters, petroleum products, paint, solvents and equipment maintenance fluids will be stored in sealed • original labeled containers in a designated hazardous materials storage area on site. Storage of • such materials will be on spill pallets or enclosed site containers. Such materials will not be disposed of in dumpsters. Disposal of hazardous materials shall be in accordance with all applicable Local, State and Federal regulations. All construction personnel will be instructed as • to the permitted procedures for waste material disposal. The procedures shall be posted, in writing, at the site superintendent's office trailer. The site superintendent shall be responsible for • seeing that practices are followed. • Installation Schedule: Maintenance and Hazardous material storage areas shall be inspected weekly and Inspection: following storm events. Storage area(s) shall be kept well organized, clean and equipped with sufficient cleanup supplies as . required for the materials being stored. Material inventories, . material safety data sheets and emergency contact numbers shall be maintained in the site superintendent's office trailer. Responsible Staff. Site Superintendent 40 is BMP Description: Sanitary Waste. Temporary sanitary facilities (portable toilets) will be . provided on the site. Portable toilets will not be located in concentrated runoff flow paths or • traffic areas. Collection pans will be provided beneath toilets as a secondary containment mechanism. 0 Installation Schedule: Maintenance and Sanitary waste shall be collected by private contractor in Inspection: accordance with their customary collection schedule. Toilets will • be inspected by that Contractor on a weekly basis for evidence of • leaking holding tanks. Any toilets with leaking tanks shall be • removed immediately from the site. EPA SWPPP Template, Version 1.1, September 17,2007 20 Stormwater Pollution Prevention Plan(SWPPP) INSERT PROJECT NAME and DATE IM; 111FIXEMW• • Responsible Staff. Site Superintendent BMP Description: Recycling. Recyclable construction scrap such as pallets, cardboard and other recyclable containers shall be disposed of in a designated recycling dumpster. The dumpster shall have a secure water tight cover and be placed on site away from runoff flow paths. All construction personnel will be instructed as to the permitted procedures for waste material disposal. The procedures shall be posted, in writing, at the site superintendent's office trailer. The site superintendent shall be responsible for seeing that practices are followed. Installation Schedule: The designated recycling dumpster shall be installed upon commencement of construction activities. Maintenance and The recycling dumpster shall be inspected weekly and following Inspection: storm events. The recycling dumpster will be emptied when . filled,but in no case less than monthly. ' Responsible Staff. Site Superintendent s r 3.2 Establish Proper Building Material Staging Areas • Instructions: — Describe construction materials expected to be stored on-site and procedures for storage of materials to minimize exposure of the materials to stormwater.(For more information,see SWPPP Guide, Chapter 5, P2 Principle 2 and EPA's CGP Part 3.4.1-1.) BMP Description: Construction equipment and maintenance supplies will be stored in the project staging area. Hand tools, small parts and the like will be stored in a site shed, watertight shipping container within proposed buildings or a trailer. Hazardous materials shall be stored as • described in Section 3.1. • Soil stockpiles will be maintained in a designated staging area until such are removed or distributed in connection with site grading activities. Stockpiles will not be placed in areas of runoff concentration and will be protected with erosion control BMP's. • Materials used in connection with site utility construction, such as pipe, manholes and fittings, • shall be stored in the project staging area. Building materials used to construct new buildings shall be stored in designated staging areas. Such materials should be stored on wood blocks in order to minimize contact with surface runoff. Installation Schedule: The project staging and materials storage area will be designated prior to commencement of construction activities and expanded in • accordance with the project demands. Materials storage areas for each building will be designated following rough grading and foundation construction. • EPA SWPPP Template,Version 1.1, September 17,2007 21 Stormwater Pollution Prevention Plan(SWPPP) INSERT PROJECT NAME and DAfE `. Maintenance and Storage areas will be inspected weekly and following storm Inspection: events. Perimeter controls, covers and liners will be repaired or replaced as needed to maintain proper functioning. Storage areas • will be kept in an organized manner. . Responsible Staff.• • BMP Description: Installation Schedule: Maintenance and Inspection: Responsible Staff: Repeat as needed 3.3 Designate Washout Areas Instructions: - Describe location(s)and controls to eliminate the potential for discharges from washout areas for concrete • mixers, paint,stucco,and so on.(For more information,see SWPPP Guide, Chapter 5, P2 Principle 3.) . — Also,see EPA's Concrete Washout BMP Fact Sheet at www.epa.oov/npdesistormwater/menuofbmps/construction/concrete wash BMP Description: Designated temporary below grade concrete washout areas will be designated • for each proposed building as the project progresses. The washout areas will be a minimum of • 10 feet square and 3 feet deep, lined with a 10 mil thick impervious liner. Concrete delivery • operators will be advised of the washout area. Concrete washout areas shall not be located in runoff paths nor within 50 feet of catch basins. Concrete will not be placed nor trucks washed out during or immediately prior to an anticipated . rainfall event. Excess concrete and washout slurry will be discharged into the designated washout area or removed from the site. When a washout area is no longer needed, it will be cleaned out, materials removed and disposed of as described below,backfilled, graded and stabilized. Installation Schedule: Washout areas will be constructed for each proposed building . prior to commencement of foundation installation. • Maintenance and Washout areas shall be inspected daily when concrete deliveries • Inspection: are occurring. Inspection shall include liner stability, proper use • of washout area and cleanout when the area is filled to 75 percent of its capacity. Responsible Staff • EPA SWPPP Template, Version 1.1, September 17, 2007 22 Stonnwater Pollution Prevention Plan(SWPPP) • INSERT PROJECT\AVtE and DATE: eBMP Description: Installation Schedule: Maintenance and Inspection: Responsible Staff.• Repeat as needed 3.4 Establish Proper EquipmenWehicle Fueling and Maintenance Practices • Instructions: • — Describe equipmentivehicle fueling and maintenance practices that will be implemented to control pollutants to stormwater(e.g.,secondary containment,drip pans,and spill kits)(For more information,see SWPPP Guide, Chapter 5, P2 Principle 4.) — Also, see EPA's Vehicle Maintenance and Washing Areas BMP Fact Sheet at • www.epa.goyinpdes/stormwater/menuofbmpskonstruction/vehicile maintain • BMP Description: Vehicle/Equipment Fueling and Maintenance. (Discuss with General Contractor, maintenance limited to routine activities). Installation Schedule: Equipment and vehicle maintenance and fueling practices will be implemented at the time of commencement of construction • activities. . Maintenance and (Discuss w/Contractor) Inspection: • Responsible Staff: BMP Description: Installation Schedule: Maintenance and . Inspection: • Responsible Staff.• Repeat as needed • EPA SWPPP Template, Version 1.1, September 17, 2007 23 Stormwater Pollution Prevention Plan(SWPPP) • INSERT PROJECTNAME and DATE 3.5 Control EquipmentlVehicle Washing Instructions: — Describe equipment/vehicle washing practices that will be implemented to control pollutants to stormwater. (For more information,see SWPPP Guide,Chapter 5,P2 Principle 5.) . — Also,see EPA's Vehicle Maintenance and Washing Areas BMP Fact Sheet at ! www.epa.gov/npdes/stormwater/menuofbmi)s/construction/vehicile maintain • BMP Description: (Discuss with Contractor, likely will not be allowed on site). Installation Schedule: Maintenance and Inspection: Responsible Staff.• j BMP Description: Installation Schedule: Maintenance and Inspection: • Responsible Staff: Repeat as needed 3.6 Spill Prevention and Control Plan • Instructions: • — Describe the spill prevention and control plan to include ways to reduce the chance of spills,stop the • source of spills,contain and clean up spills, dispose of materials contaminated by spills,and train personnel responsible for spill prevention and control.(For more information, see SWPPP Guide,Chapter 5, P2 Principle 6 and EPA's CGP Parts 4.3 and 4.4.) . — Also,see EPA's Spill Prevention and Control Plan BMP Fact sheet at . www.epa.gov/npdes/stormwater/menuofbmps/construction/spill control • Spill Prevention and Control Procedures - BMP Description: i a. Employee Training—all employees will be trained as to procedures to be followed relative to • spill prevention and control. • b. Vehicle Maintenance—major vehicle and equipment maintenance will be accomplished offsite. Vehicles and equipment will be checked for leaking oil, fuel or other fluids. Such leaks shall be repaired immediately. c. Hazardous Material Storage—hazardous materials shall be stored in accordance with Section 3.1 and all applicable regulatory requirements. • EPA SWPPP Template, Version 1.1, September 17, 2007 24 • • • Stormwater Pollution Prevention Plan(SWPPP) • INSERT PROJECT NAME and DATE; • • 3.7 Any Additional BMPs • Instructions: • - Describe any additional BMPs that do not fit into the above categories. Indicate the problem they are • intended to address. BMP Description: Installation Schedule: • Maintenance and Inspection: • Responsible Staff.- • • BMP Description: • Installation Schedule: • Maintenance and • Inspection: • Responsible Staff. • Repeat as needed • • • • • • • • • • • • EPA SWPPP Template,Version 1.1, September 17, 2007 25 • • • Stormwater Pollution Prevention Plan(SWPPP) INSERTPROJECT NAME and DATE 3.8 Allowable Non-Stormwater Discharge Management Instructions: Identify all allowable sources of non-stormwater discharges that are not identified.The allowable non- stormwater discharges identified in Part 1.32 of EPA's CGP include . ✓ Discharges from fire-fighting activities • ✓ Fire hydrant flushings ✓ Waters used to wash vehicles where detergents are not used ✓ Water used to control dust in accordance with EPA's CGP, Part 3, Subpart 3A.G ✓ Potable water including uncontaminated water line flushings ✓ Routine external building wash down that does not use detergents • ✓ Pavement wash waters where spills or leaks of toxic or hazardous materials have not occurred (unless all spilled material has been removed)and where detergents are not used ✓ Uncontaminated air conditioning or compressor condensate ✓ Uncontaminated ground water or spring water ✓ Foundation or footing drains where flows are not contaminated with process materials such as esolvents ✓ Uncontaminated excavation dewatering ✓ Landscape irrigation — Identify measures used to eliminate or reduce these discharges and the BMPs used to prevent them from • becoming contaminated. • — For more information, see SWPPP Guide, Chapter 3.A or EPA's CGP Part 1.3.6 and 3.5. • List allowable non-stormwater discharges and the measures used to eliminate or reduce them and to prevent them from becoming contaminated: BMP Description: Installation Schedule: Maintenance and Inspection: Responsible Staff.• BMP Description.. Installation Schedule: Maintenance and • Inspection: • Responsible Staff.• Repeat as needed • EPA SWPPP Template, Version 1.1, September 17, 2007 26 • Stormwater Pollution Prevention Plan(SWPPP) INSERT PRO:IECT NINAME and DATE SECTION 4: SELECTING POST-CONSTRUCTION BMPs Instructions: — Describe all post-construction stormwater management measures that will be installed during the • construction process to control pollutants in stormwater discharges after construction operations have been completed. Examples of post-construction BMPs include the following: ✓ Biofilters ✓ Detention/retention devices 0 ✓ Earth dikes,drainage swales,and lined ditches • ✓ Infiltration basins ✓ Porous pavement ✓ Other proprietary permanent structural BMPs ✓ Outlet protection/velocity dissipation devices • ✓ Slope protection • ✓ Vegetated strips and/or swales • — Identify any applicable federal,state, local,or tribal requirements for design or installation. Describe how low-impact designs or smart growth considerations have been incorporated into the design. 0 — For any structural BMPs, you should have design specifications and details and refer to them. Attach 0 them as appendices to the SWPPP or within the text of the SWPPP. • — For more information on this topic,see your state's stormwater manual. — You might also want to consult one of the references listed in Appendix D of the SWPPP Guide and EPA's 0 CGP Part 3, Subparts 3A.E and 3.9. — Visit the post-construction section of EPA's Menu of BMPs at: www.epa.gov/npes/menuofbmps 0 BMP Description: Deep Sump Hooded Catch Basins. Deep sump hooded catch basins will be 0 installed prior to pavement installation and will intercept runoff from paved areas of the site. 0 Installation Schedule: Catch basins will be installed prior to installation of pavement. 0 Maintenance and Basins will be inspected and maintained in accordance with • Inspection: Section—of the Operation and Maintenance Plan dated January 2008. • Responsible Staff. BMP Description: Stormceptor. The Stormceptor is a Massachusetts step tested water quality device which will attain 77 percent total suspended solids removal. Installation Schedule: The Stormceptor will be installed prior to installation of • pavement. Maintenance and The Stormceptor will be inspected and maintained in accordance • Inspection: with Section B of the Operation and Maintenance Plan dated January 2008. 0 Responsible Staff: • EPA SWPPP Template, Version 1.1, September 17, 2007 27 • • • Stormwater Pollution Prevention Plan(SWPPP) INSERT PROJECT NAME and DA FE • • BMP Description: Infiltration Basin. An underground infiltration basin is proposed as a LID • alternative to dispose of runoff from a portion of the roof of the 22 unit building on Mason • Street. • Installation Schedule: The infiltration basin will be installed prior to pavement • installation south of the 22 unit building. • Maintenance and The infiltration basin will be inspected and maintained in Inspection: accordance with Section E of the Operation and Maintenance • Plan dated January 2008. Responsible Staff.• • BMP Description: Porous Pavement. An area of porous pavement is proposed south of the 57 unit building as a LID alternative and local test case. • Installation Schedule: The porous pavement area will be installed following installation • of the base course of paving south of the 57 unit building and • field confirmation of subsurface soil suitability. • Maintenance and The porous pavement shall be inspected and maintained in • Inspection: _ accordance with Section F of the Operation and Maintenance Plan dated January 2008. • Responsible Staff. • • • • • • • • • • • • • • • • • • EPA SWPPP Template, Version 1.1, September 17, 2007 28 • • • • Stormwater Pollution Prevention Plan(SWPPP) 1111 POW 11111; INNIMPIRI 1—- INSERT PROJECT NAME and DATE • • SECTION 5: INSPECTIONS • • 5.1 Inspections • • Instructions: • — Identify the individual(s)responsible for conducting inspections and describe their qualifications. Reference or attach the inspection form that will be used. • — Describe the frequency that inspections will occur at your site including any correlations to storm frequency • and intensity. • — Note that inspection details for particular BMPs should be included in Sections 2 and 3. — You should also document the repairs and maintenance that you undertake as a result of your inspections. • These actions can be documented in the corrective action log described in Part 5.3 below. • — For more on this topic,see SWPPP Guide, Chapters 6 and 8 and EPA's CGP Part 3, Subparts 3.6.A, 3.10 • and 3.11.C. • — Also,see suggested inspection form in Appendix B of the SWPPP Guide. • 1. Inspection Personnel: Identify the person(s)who will be responsible for conducting inspections and • describe their qualifications: • 2. Inspection Schedule and Procedures: • Describe the inspection schedules and procedures you have developed for your site(include frequency of • inspections for each BMP or group of BMPs, indicate when you will inspect, e.g., before/during/and after rain • events,spot inspections): • Describe the general procedures for correcting problems when they are identified. Include responsible staff • and time frames for making corrections: • Attach a copy of the inspection report you will use for your site. • See Appendix E. • • • • • • • • • • • • EPA SWPPP Template,Version 1.1, September 17, 2007 29 • • • • Stormwater Pollution Prevention Plan(SWPPP) • INSERT PROJECT NAME and DATE _.___..._. _,_.---.... ... ....-__ ---...-_-__.... 5.2 Delegation of Authority Instructions: — Identify the individual(s)or specifically describe the position where the construction site operator has delegated authority for the purposes of signing inspection reports, certifications,or other information. — Attach a copy of the signed delegation of authority form that will be used. • — For more on this topic,see SWPPP Guide, Chapter 7 and Appendix G, Subsection 11 of EPA's CGP. • Duly Authorized Representative(s) or Position(s): • Insert Company or Organization Name: • Insert Name: Insert Position: • Insert Address: Insert Citv, State, Zip Code: Insert Telephone Number: Insert Fax/Email: • Attach a copy of the signed delegation of authority form in Appendix K. 5.3 Corrective Action Log Instructions: — Create here,or as an attachment, a corrective action log. This log should describe repair,replacement, • and maintenance of BMPs undertaken as a result of the inspections and maintenance procedures described above. Actions related to the findings of inspections should reference the specific inspection report. — This log should describe actions taken, date completed,and note the person that completed the work. • Corrective Action Log: • See Appendix F. • EPA SWPPP Template, Version 1.1, September 17,2007 30 • • • Stormwater Pollution Prevention Plan(SWPPP) INSERT PROJECT \AM and DATE 114WIRM191111 SIM RRMW 111111111 W; 111-;-- -1• • SECTION 6: RECORDKEEPING AND TRAINING • 6.1 Recordkeeping • • Instructions: • — The following is a list of records you should keep at your project site available for inspectors to review: • — Dates of grading,construction activity,and stabilization (which is covered in Sections 2 and 3) • — A copy of the construction general permit(attach) — The signed and certified N01 form or permit application form(attach) • — A copy of the letter from EPA or/the state notifying you of their receipt of your complete N01/application • (attach) • — Inspection reports(attach) • — Records relating.to endangered species and historic preservation(attach) — Check your permit for additional details • — For more on this subject,see SWPPP Guide,Chapter 6.0 and EPA's CGP Part 3, Subparts 3.4.C,3.8; • 3.10.G and 3.12.A. • • Records will be retained for a minimum period of at least 3 years after the permit is terminated. • • Date(s) when major grading activities occur: • INSERT LOG HERE or REFERENCE ATTACHMENT Date(s) when construction activities temporarily or permanently cease on a portion of the site: • NSERT LOCI HERE or REFERENCE ATTACHMENT • Date(s) when an area is either temporarily or permanently stabilized: • INSERT LOG HERE or REFERENCE ATTACHMENT • • 6.2 Log of Changes to the SWPPP • • Instructions: • — Create a log here,or as an attachment,of changes and updates to the SWPPP. You should include • additions of new BMPs, replacement of failed BMPs, significant changes in the activities or their timing on • the project,changes in personnel,changes in inspection and maintenance procedures, updates to site • maps,and so on. • Log of changes and updates to the SWPPP • See Appendix G. • • • EPA SWPPP Template, Version 1.1, September 17, 2007 31 • • Stormwater Pollution Prevention Plan(SWPPP) • INSERT PROJECT NAME and DATE 6.3 Training Instructions: • — Training your staff and subcontractors is an effective BMP. As with the other steps you take to prevent stormwater problems at your site,you should document the training that you conduct for your staff,for those with specific stormwater responsibilities(e.g. installing,inspecting, and maintaining BMPs),and for • subcontractors. - . — Include dates, number of attendees,subjects covered,and length of training. — For more on this subject, see SWPPP Guide, Chapter 8. Individual(s) Responsible for Training: LhSERT TEXT or TABLE HERE Describe Training Conducted: • General stormwater and BMP awareness training for staff and subcontractors: • Detailed training for staff and subcontractors with specific stormwater responsibilities: • EPA SWPPP Template, Version 1.1, September 17, 2007 32 • • • Stormwater Pollution Prevention Plan(SWPPP) i KOO"04"Ims, FIR 9111 F91 11 NSERT PROJECT NAME and DATE • SECTION 7: FINAL STABILIZATION • Instructions: — Describe procedures for final stabilization. If you complete major construction activities on part of your • site,you can document your final stabilization efforts for that portion of the site. Many permits will allow you • to then discontinue inspection activities in these areas(be sure to check your permit for exact • requirements). You can amend or add to this section as areas of your project are finally stabilized. • — Update your site plans to indicate areas that have achieved final stabilization. — For more on this topic,see SWPPP Guide, Chapter 9 and EPA's CGP Part 3,Subparts 3.11 and 3.13.D, • and Part 5, Subpart 5.1. • BMP Description: • Installation Schedule: • Maintenance and • Inspection: • Responsible Staff: • BMP Description: Installation Schedule: • Maintenance and • Inspection: Responsible Staff. • • Repeat as needed • • • • • • • • • • • • • • EPA SWPPP Template, Version 1.1, September 17, 2007 33 • • • • Stormwater Pollution Prevention Plan(SWPPP) ME•RT PROIEC"1'NAME and DATE • • SECTION 8: CERTIFICATION AND NOTIFICATION • • Instructions: • — The SWPPP should be signed and certified by the construction operator(s). Attach a copy of the N01 and • permit authorization letter received from EPA or the state in Appendix D. • — For more information,see EPA's CGP Part 3, Subpart 3.12.A-D and Appendix G, Section 11. 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. • • Name: Title: • Signature: Date: • Repeat as needed for multiple construction operators at the site • • • • • • • • • • • • • • • • EPA SWPPP Template,Version 1.1, September 17, 2007 34 • • Stormwater Pollution Prevention Plan(SWPPP) • Riverview Place March 2008 • • SWPPP APPENDICES • • Attach the following documentation to the SWPPP: • Appendix A - General Location Map • • Appendix B - Site Maps • Appendix C - Construction General Permit • Appendix D- NOI and Acknowledgement Letter from EPA/State • Appendix E- Inspection Reports • • Appendix F- Corrective Action Log (or in Part 5.3) Appendix G - SWPPP Amendment Log (or in Part 6.2) • Appendix H- Subcontractor Certifications/Agreements • • Appendix I- Grading and Stabilization Activities Log (or in Part 6.1) • Appendix J- Training Log Appendix K- Delegation of Authority Appendix L - Additional Information (i.e., Endangered Species and Historic Preservation Documentation) • • • • • • • • • • • • • • EPA SWPPP Template, Version 1.1, September 17, 2007 35 • • �lii T'- E '$' s �4 "a a�> �,>'�,y�=v�� t�'iF�.443 �� f\;a��,N7 2 •� f{-„-��'� � ���-g,,� �"�J�1 \meq P � P n tea£ ..I �t�(\� 3n2 iff Ac��]„ � • —z ti'q 7a� �a s'a,;y♦ a syF ylP k 'ta pl o� "'� �. r 4� F ' �s�r�r`� -A,�+n"1q gRrk� • a 1 � .yy�� A L s z 'f is yn y , *.�s�R ., �i� g$� +.. ♦T z,.A.1 '� �'p b s .a�iri`J�� r r �6 v .+.` e a � a �, �`d n"�v�iba :Y � Gd 1�'✓ F5� }R'� f 'ra�'{�{ i ^}.a +`” "'^�'s t� .Arae}>:x� rk'+��A' ��i• ���i�,�� �ee�'q t � �,t� a�b� 1� 1 ��•' � .� r�'�r�" t ^.t'.Jr� 3d r'`'�'ar >�ri.,T"S" S�, � � �i ti.. `Thi 3L �. .,, ;i .✓' � k R } iv` b ' '� Mk ,g� �„.y I s e 1 1 �A�'. :{ � � .a' a r rv� f �``•�*�:��' �',+�' .r rru ,� � o- �.� � .RI v:§�� '.E F '''fid�.��tA' 4f'A�4 `*v.�i',ti �. �•'��r"��e��t ,� ki arra i_ k a1 en, ,r ay d3 e v s k�Y t t rJ r ay.s-S.:s v �a• "rY' its' �l�K� .-y R;a v } 3 .Pil wr 8 y ny lr r to S � p> > > R t��z£n°Fi �°v -t'✓ .S- s qN ,'� r•4,”` e tdhy''fpF'+ 5<'''S,`,thx rJti ir,> ✓ ¢ a s i, Z"'e^ k ° 5\� �'"� ` > s ' ° t `- 7• f. .q' 4r' � 1 v, � s?tT 2.�'. x i4 m t a z7� i _ nt r £,✓�. F r'0 �' �,�w,l�.+" /�, n ,�r� r'_+ts es�,yh�t`�t h rt � w 4 �� �a3vi'�'$ a�� ,�'�E+ "`�"'�lr.:s '� t �-c���'y-•l _ �►� �' * ,t a v.'�y'� r�4'�''L`�`Es.'3��a" �'�',� "��"- � �s'€'sog ya`i fs zm j ab v e � i ,�.`� r �� e>� � ra•T a..� r1^a }, e�t' �' „s'+ LL,3�S* a4aa.,,rLL`' h `t",� ti � rl S r 1 N Is, a��. *- ire � � ��+lT�'4,.¢'x'£' xe'�ks svr`v f rfX��r�x n•`er \'�$ y,.. s a, ?a•�." � .4 ���,��h'�f'•� �"oi t t x4�aa� �X. �„?�. &�`}£ks"�{ ,�,. E `� '4�. �i SS `ya /y s Sg�T.Jry\�� pc5µtr� J� �� �'a -• kts: �XR4••!- 1'ia•i� r r � `w,`5�'�r�'��a�'�f � 771 ..�-.. Y�! �l� 'r r'�e r �e€' .�� � x �� `"'{ 0 w v417- A Pu _��2 \Y� x-E t�*s+��*u ."�- ;r 1 '£+a�`A 3 9 s z>z w 4�"a r �- fa � '�✓� 1 �a +,. s I' s+�' \9 n` r,z�56z y�� s c+'v r`�TvJt ,�,ry..J,n �� °1V 1,�.a�vk'�'��`�..,�yysw h�Nt✓»'�.y`�'M +Y �: car' � 1a},,� '^y,s )�gt1�. �s ahPts '� r .� � m,. �v'A�n �t � v. y. L,.R L+���L�sik' ,y 5� rY,'.}m3af•1 p 4 �' ab � a �5 �"` a^.y 5F� ff��s gra�FUryaa+ 1'`�Y la� \� �"� a k�a•?' '�.� W" '�` �-�Le�'"`',� r,��A� r r,� c d v* to e� S✓d s :e vsz ta°rw 6s d 'i{ N8 m l�> Jr�n� �-r'? ``.jj. !� Y S'fi'"��[ �4 C '3.s�'^bti Sii 'v' W dy,k5' §�,�at "E•'�1' R ) Lx� �. L p'�i < ;� «.,� �1 i `� �. r,^�`y '�e* siM h�� 'sG$�r,�'�,�}� 'afi� �a�`✓i`za�r¢m�ax� �N �n5ai r�S �_- s • • ! • • • • • • • s • APPENDIX E • SAMPLE INSPECTION REPORT • • • • • • • • • ! • • • • • • • • ! • • • • Stormwater Construction Site Inspection Report GeneralInfortna#tone Project Name Riverview Place NPDES Tracking No. Location Salem, Mass. • Da[e of Inspection StartlEnd Time • Inspector's Name(s) Inspector's Title(s) • Inspector's Contact Information • Inspector's Qualifications Insert qualifications or add reference to the SWPPP.(See Section 5 of the SWPPP Template) • Describe present phase of . construction SType of Inspection: . ❑ Regular ❑ Pre storm event ❑ During storm event ❑ Post storm event. y R�" s a ,. s Weather7nfrgiatton . � o .r ,r � . .. .., Has there been a storm event since the last inspection? ❑Yes ❑No If yes,provide: • Storm Start Date&Time: Storm Duration(hrs): Approximate Amount of Precipitation(in): • Weather at time of this inspection? - ❑ Clear ❑Cloudy ❑Rain ❑ Sleet ❑ Fog ❑ Snowing ❑High Winds ❑ Other: Temperature: • Have any discharges occurred since the last inspection? ❑Yes ❑No If yes,describe: • Are there any discharges at the time of inspection? ❑Yes ❑No • If yes,describe: Site-specific BMPs • • Number the structural and non-structural BMPs identified in your SWPPP on your site map and list them .below(add as many BMPs as necessary). Carry a copy of the numbered site map with you during your • inspections. This list will ensure that you are inspecting all required BMPs at your site. • • Describe corrective actions initiated, date completed, and note the person that completed the work in the Corrective Action Lo . • �- InstaFled? uitenauces . AU ONSM s+EN _ ...".. T .._ sr.,. ....-.�...g,. Ui ❑ 1 Protect Nat. Features ❑Yes No ❑Yes ❑No • 2 Protect Stockpiles ❑Yes ONo ❑Yes ❑No 3 Existing Nat. Swale ❑Yes ❑No ❑Yes ❑No • 4 Diversion Swale ❑Yes ❑No ❑Yes ❑No • 5 Catch Basins ❑Yes ❑No ❑Yes ❑No 6 Stormce for ❑Yes ❑No ❑Yes ❑No • 7 Sediment Basin ❑Yes ❑No ❑Yes ❑No • 8 Infiltration Basin ❑Yes ❑No ❑Yes ❑No • 9 Porous Pavement ❑Yes ❑No ❑Yes ❑No 10 ❑Yes ❑No ❑Yes ❑No • 1l ❑Yes ❑No ❑Yes ONo • EPA SWPPP Inspection Report, Version 1.1, September 17, 2007 2 BMP ;BMP Bl?1Pz Corrective Action Needed and Notes ' e 12 ❑Yes ❑No ❑Yes ❑No • 13 ❑Yes ❑No ❑Yes ❑No • 14 ❑Yes ❑No ❑Yes ❑No • 15 ❑Yes ❑No ❑Yes ❑No 16 ❑Yes ❑No ❑Yes ❑No • 17 ❑Yes ❑No ❑Yes ❑No 18 ❑Yes ❑No ❑Yes ❑No 19 ❑Yes ❑No ❑Yes ❑No • 20 ❑Yes ❑No ❑Yes ❑No • Overall Site Issues • - Below are some general site issues that should be assessed during inspections. Customize this list as needed for conditions at your site. kw BMFlacflvrty *Imgiemented9 "141auttenanceCorcedry AtttouATCededand;Nates+ 9 ' `"'S P` �' ?w�t3� elred. «.-�: e. +,«..,. .-_ .4»"wY a W . _ " • 1 Are all slopes and ❑Yes ❑No ❑Yes ❑No disturbed areas not actively being worked • properly stabilized? 2 Are natural resource ❑Yes ❑No ❑Yes ❑No areas(e.g.,streams, wetlands,mature trees, • etc.)protected with barriers or similar • BMPs? 3 Are perimeter controls ❑Yes ❑No ❑Yes ❑No . and sediment barriers • adequately installed and maintained? 4 Are discharge points and ❑Yes ❑No ❑Yes ❑No receiving waters free of . any sediment deposits? 5 Are storm drain inlets ❑Yes ❑No ❑Yes ❑No • properly protected? . 6 Is the construction exit ❑Yes ❑No ❑Yes ❑No preventing sediment - from being tracked into • the street? 7 Is trash/litter from work ❑Yes ❑No ❑Yes ❑No • areas collected and placed in covered dumpsters? • 8 Are washout facilities ❑Yes ❑No ❑Yes ❑No (e.g.,paint, stucco, • concrete)available, • clearly marked,and maintained? . EPA SWPPP Inspection Report, Version 1.1, September 17, 2007 3 • • "°,� BMPlacttvt t t� 7m lemented'' �� 9 Are vehicle and ❑Yes ❑No ❑Yes ❑No • equipment fueling, • cleaning,and maintenance areas free of spills, leaks,or any • other deleterious material? • 10 Are materials that are ❑Yes ❑No ❑Yes ❑No • potential stormwater contaminants stored • inside or under cover? • 11 Are non-stormwater ❑Yes ❑No —Li-yes ❑No • discharges(e.g., wash water,dewatering) • properly controlled? • 12 ❑Yes ❑No ❑Yes ❑No • • • Non-Com fiance Describe any incidents of non-compliance not described above: • • • • s • • 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 and title: Signature: Date: • • • • • • • EPA SWPPP Inspection Report Version 1.1, September 17, 2007 4 • Stormwater Pollution Prevention Plan(SWPPP) Riverview Place March 2008 Appendix F — Sample Corrective Action Log Project Name: SWPPP Contact: Inspection. .InspectorDescriotton of BMP Deficiency Corrective Action Needed (including Date Action Date '; Name(s) planned date/responsible person) Taken/Responsible 4 person EPA SWPPP Template, Version 1.1, September 17, 2007 • • iiiiiiiiiiiiiiiwiiiiiiiii • • iiiiiiiiiiiiii • Stormwater Pollution Prevention Plan (SWPPP) Riverview Place March 2008 Appendix G — Sample SWPPP Amendment Log Project Name: SWPPP Contact: Arnendment No., , Description of the'Aiii6ndment .} Date of Amendment : .Amendment Prepared by !> .E Names antl Title EPA SWPPP Template, Version 1.1, September 17, 2007 • • • Stormwater Pollution Prevention Plan(SWPPP) • Riverview Place March 2008 • Appendix H — Sample Subcontractor Certifications/Agreements • • SUBCONTRACTOR CERTIFICATION • STORMWATER POLLUTION PREVENTION PLAN • • Project Number: • • Project Title: • Operator(s): • • As a subcontractor, you are required to comply with the Stormwater Pollution Prevention Plan (SWPPP)for • any work that you perform on-site. Any person or group who violates any condition of the SWPPP may be subject to substantial penalties or loss of contract. You are encouraged to advise each of your employees • working on this project of the requirements of the SWPPP. A copy of the SWPPP is available for your • review at the office trailer. • Each subcontractor engaged in activities at the construction site that could impact stormwater must be • identified and sign the following certification statement: • • 1 certify under the penalty of law that I have read and understand the terms and conditions of the SWPPP for the above designated project and agree to follow the Ws and practices described in • the SWPPP. • This certification is hereby signed in reference to the above named project: j • Company: • • Address: Telephone Number: • Type of construction service to be provided: • • • Signature: • Title: • • Date: • • EPA SWPPP Template,Version 1.1, September 17, 2007 • • Stormwater Pollution Prevention Plan(SWPPP) Riverview Place March 2008 Appendix I — Sample Grading and Stabilization Activities Log Project Name: SWPPP Contact: I1ate 4 Description of QSradmg Activity s DaEe Gratlmg , „ = Date When ¢` Descrlptlon of Stabilaatlon Measure antl Giading M ;' Aatiwity Ceasetl Stabilitytion LocakionXr- �dCtiVlty Mecires'are °, lnitlaied' Temporary or Imtatetl Permanent EPA SWPPP Template, Version 1.1, September 17, 2007 • • Stormwater Pollution Prevention Plan(SWPPP) Riverview Place March 2008 • • Appendix J — Sample SWPPP Training Log • • Stormwater Pollution Prevention Training Log • • Project Name: • • Project Location: • Instructor's Name(s): • ' Instructor's Title(s): • • Course Location: Date: • • Course Length (hours): • Stormwater Training Topic: (check as appropriate) • • ❑ Erosion Control BMPs ❑ Emergency Procedures • ❑ Sediment Control BMPs ❑ Good Housekeeping BMPs • • ❑ Non-Stormwater BMPs Specific Training Objective: • Attendee Roster: (attach additional pages as necessary) • No. Name of Attendee Company • 2 3 • 4 • 5 • 6 • g • 9 • 10 • • EPA SWPPP Template, Version 1.1, September 17, 2007 • • • Stortnwater Pollution Prevention Plan(SWPPP) lillillill lip;• Riverview Place March 2008 Appendix K — Sample Delegation of Authority Form • • Delegation of Authority • I, (name), hereby designate the person or specifically described position below to be a duly authorized representative for the purpose of overseeing compliance • with environmental requirements, including the Construction General Permit, at the • construction site. The designee is authorized to sign any reports, stormwater pollution prevention plans and all other documents required by the permit. • • (name of person or position) (company) (address) • (city, state, zip) • (phone) • By signing this authorization, I confirm that I meet the requirements to make such a designation as set forth in Appendix G, Subsection I LA of EPA's Construction General Permit(CGP), and • that the designee above meets the definition of a"duly authorized representative"as set forth in • Appendix G, Subsection 1 LB (1-3). • 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. • Name: • • Company: • Title: • • Signature: Date: • • • • • EPA SWPPP Template, Version 1.1, September 17, 2007 • 0 PERMIT REQUIREMENTS 0 • Permit Requirements • • Variance from Salem Zoning Board of Appeals • Section 7-21 Special Permit. NRCC Mixed Use District • • Site Plan Review(Section 7-18) • • Wetlands and Flood Hazard District Special Permit • Order of Conditions (Salem Conservation Commission) • • Chapter 91 License—Massachusetts DEP CHECKLIST FOR STORMWATER REPORT • • Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands Program Checklist for Stormwater Report • ♦ A. Introduction . • Important: A Stormwater Report must be submitted with the Notice of Intent permit application to document ohms ullinge the compliance with the Stormwater Management Standards. The following checklist is NOT a substitute for • computer,use the Stormwater Report(which should provide more substantive and detailed information) but is offered • only the tab key here as a tool to help the applicant organize their Stormwater Management documentation for their • to move your Report and for the reviewer to assess this information in a consistent format. As noted in the Checklist, cursor-do not the Stormwater Report must contain the engineering computations and supporting information set forth in • use the return 9 key. Volume 3 of the Massachusetts Stormwater Handbook. The Stormwater Report must be prepared and VQ• certified by a Registered Professional Engineer(RPE) licensed in the Commonwealth. The Stormwater Report must include: • The Stormwater Checklist completed and stamped by a Registered Professional Engineer(see • page 2) that certifies that the Stormwater Report contains all required submittals.' This Checklist • is to be used as the cover for the completed Stormwater Report. ApplicantlProject Name • • Project Address • • Name of Firm and Registered Professional Engineer that prepared the Report • Long-Term Pollution Prevention Plan required by Standards 4-6 • • Construction Period Pollution Prevention and Erosion and Sedimentation Control Plan required • by Standard 82 • • Operation and Maintenance Plan required by Standard 9 In addition to all plans and supporting information, the Stormwater RBport must include a brief narrative describing stormwater management practices, including environmentally sensitive site design and LID • techniques, along with a diagram depicting runoff through the proposed BMP treatment train. Plans are • required to show existing and proposed conditions, identify all wetland resource areas, NRCS soil types, critical areas, Land Uses with Higher Potential Pollutant Loads (LUHPPL), and any areas on the site • where infiltration rate is greater than 2.4 inches per hour. The Plans shall identify the drainage areas for • both existing and proposed conditions at a scale that enables verification of supporting calculations. • As noted in the Checklist, the Stormwater Management Report shall document compliance with each of • the Stormwater Management Standards as provided in the Massachusetts Stormwater Handbook. The soils evaluation and calculations shall be done using the methodologies set forth in Volume 3 of the • Massachusetts Stormwater Handbook. • To ensure that the Stormwater Report is complete, applicants are required to fill in the Stormwater Report • Checklist by checking the box to indicate that the specified information has been included in the Stormwater Report. If any of the information specified in the checklist has not been submitted, the i. applicant must provide an explanation. The completed Stormwater Report Checklist and Certification • must be submitted with the Stormwater Report. • • 'The Stormwater Report may also include the Illicit Discharge Compliance Statement required by Standard 10. If not included in the Stomiwater Report,the Illicit Discharge Compliance Statement must be submitted prior to the discharge of stormwater runoff to • the post-construction best management practices. • 2 For some complex projects,it may not be possible to include the Construction Period Erosion and Sedimentation Control Plan in the Stormwater Report. In that event,the issuing authority has the discretion to issue an Order of Conditions that approves the • project and includes a condition requiring the proponent to submit the Construction Period Erosion and Sedimentation Control Plan before commencing any land disturbance activity on the site. • • F13866-Checklist for Stormwater Report 111008-04/01/08 Stormwater Report Checklist•Page 1 of 8 • • i • • • Massachusetts Department of Environmental Protection • Bureau of Resource Protection - Wetlands Program • Checklist for Stormwater Report B. Stormwater Checklist and Certification • The following checklist is intended to serve as a guide for applicants as to the elements that ordinarily L • need to be addressed in a complete Stormwater Report. The checklist is also intended to provide conservation commissions and other reviewing authorities with a summary of the components necessary • for a comprehensive Stormwater Report that addresses the ten Stormwater Standards. • Note: Because stormwater requirements vary from project to project, it possible that a complete • Stormwater Report may not include information on some of the subjects specified in the Checklist. If it is determined that a specific item does not apply to the project under review, please note that the item is not • applicable(N.A.) and provide the reasons for that determination. • A complete checklist must include the Certification set forth below signed by the Registered Professional • Engineer who prepared the Stormwater Report. • Registered Professional Engineer's Certification • I have reviewed the Stormwater Report, including the soil evaluation, computations, Long-term Pollution • Prevention Plan, the Construction Period Erosion and Sedimentation Control Plan (if included), the Long- term Post-Construction Operation and Maintenance Plan, the Illicit Discharge Compliance Statement(if included) and the plans showing the stormwater management system, and have determined that they • have been prepared in accordance with the requirements of the Stormwater Management Standards as • further elaborated by the Massachusetts Stormwater Handbook. I have also determined that the information presented in the Stormwater Checklist is accurate and that the information presented in the ,• Stormwater Report accurately reflects conditions at the site as of the date of this permit application. • Registered Professional Engineer Block and Signature • • ®tea "OF • CLAYMNA. cy� MORIN m • v CIVIL y N0.3 • �S�SS N L ure a Date • Checklist • Project Type: Is the application for new development, redevelopment, or a mix of new and • redevelopment? • ❑ New development • ® Redevelopment • ❑ Mix of New Development and Redevelopment • • F13866-Checklist for Stormwater Report 111008•04/01/08 Stormwater Report Checklist•Page 2 of 8 • • • Massachusetts Department of Environmental Protection • � Bureau of Resource Protection -Wetlands Program w Checklist for Stormwater Report • Checklist (continued) • LID Measures: Stormwater Standards require LID measures to be considered. Document what • environmentally sensitive design and LID Techniques were considered during the planning and design of the project: • ❑ No disturbance to any Wetland Resource Areas ❑ Site Design Practices(e.g. clustered development, reduced frontage setbacks) • ® Reduced Impervious Area (Redevelopment Only) • ❑ Minimizing disturbance to existing trees and shrubs • ❑ LID Site Design Credit Requested: j • ❑ Credit 1 ❑ Credit 2 ❑ Credit 3 ❑ Use of"country drainage" versus curb and gutter conveyance and pipe • ® Bioretention Cells(includes Rain Gardens) ❑ Constructed Stormwater Wetlands(includes Gravel Wetlands designs) • ❑ Treebox Filter ❑ Water Quality Swale ❑ Grass Channel • ❑ Green Roof w ❑ Other(describe): • • Standard 1: No New Untreated Discharges ® No new untreated discharges • ® Outlets have been designed so there is no erosion or scour to wetlands and waters of the • Commonwealth • ® Supporting calculations specified in Volume 3 of the Massachusetts Stormwater Handbook included. w • F13866-Checklist for Stormwater Report 111008•04/01/08 Stormwater Report Checklist•Page 3 of 8 • • • Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands Program Checklist for Stormwater Report • Checklist (continued) • Standard 2: Peak Rate Attenuation • ® Standard 2 waiver requested because the project is located in land subject to coastal storm flowage • and stormwater discharge is to a wetland subject to coastal flooding. ❑ Evaluation provided to determine whether off-site flooding increases during the 100-year 24-hour storm. ❑ Calculations provided to show that post-development peak discharge rates do not exceed pre- development rates for the 2-year and 10-year 24-hour storms. If evaluation shows that off-site • flooding increases during the 100-year 24-hour storm, calculations are also provided to show that . post-development peak discharge rates do not exceed pre-development rates for the 100-year 24- hour storm. Standard 3: Recharge ® Soil Analysis provided. • ® Required.Recharge Volume calculation provided. ❑ Required Recharge volume reduced through use of the LID site Design Credits. • ® Sizing the infiltration, BMPs is based on the following method: Check the method used. • ® Static ❑ Simple Dynamic ❑ Dynamic Field' ❑ Runoff from all impervious areas at the site discharging to the infiltration BMP. • ❑ Runoff from all impervious areas at the site is not discharging to the infiltration BMP and calculations • are provided showing that the drainage area contributing runoff to the infiltration BMPs is sufficient to generate the required recharge volume. ❑ Recharge BMPs have been sized to infiltrate the Required Recharge Volume. . ® Recharge BMPs have been sized to infiltrate the Required Recharge Volume only to the maximum extent practicable for the following reason: ® Site is comprised solely of C and D soils and/or bedrock at the land surface ❑ M.G.L. c. 21E sites pursuant to 310 CMR 40.0000 • ❑ Solid Waste Landfill pursuant to 310 CMR 19.000 • ® Project is otherwise subject to Stormwater Management Standards only to the maximum extent • practicable. • ❑ Calculations showing that the infiltration BMPs will drain in 72 hours are provided. • ❑ Property includes a M.G.L. c. 21 E site or a solid waste landfill and a mounding analysis is included. . ' 80%TSS removal is required prior to discharge to infiltration BMP if Dynamic Field method is used. • F13866-Checklist for Stormwater Report 111008•04/01/08 Stormwater Report Checklist•Page 4 of 8 • • Massachusetts Department of Environmental Protection . � Bureau of Resource Protection - Wetlands Program • Checklist for Stormwater Report • Checklist (continued) • Standard 3: Recharge (continued) • ❑ The infiltration BMP is used to attenuate peak flows during storms greater than or equal to the 10- year 24-hour storm and separation to seasonal high groundwater is less than 4 feet and a mounding • analysis is provided. • ❑ Documentation is provided showing that infiltration BMPs do not adversely impact nearby wetland • resource areas. • Standard 4: Water Quality • The Long-Term Pollution Prevention Plan typically includes the following: • Good housekeeping practices; • Provisions for storing materials and waste products inside or under cover; • Vehicle washing controls; • Requirements for routine inspections and maintenance of stormwater BMPs; • Spill prevention and response plans; • Provisions for maintenance of lawns, gardens, and other landscaped areas; • Requirements for storage and use of fertilizers, herbicides, and pesticides, Pet waste management provisions, • • Provisions for operation and management of septic systems, • Provisions for solid waste management, • Snow disposal and plowing plans relative to Wetland Resource Areas, • Winter Road Salt and/or Sand Use and Storage restrictions; • Street sweeping schedules; • Provisions for prevention of illicit discharges to the stormwater management system; j • Documentation that Stormwater BMPs are designed to provide for shutdown and containment in the • event of a spill or discharges to or near critical areas or from LUHPPL; • Training for staff or personnel involved with implementing Long-Term Pollution Prevention Plan; • List of Emergency contacts for implementing Long-Term Pollution Prevention Plan. • ® A Long-Term Pollution Prevention Plan is attached to Stormwater Report and is included as an . attachment to the Wetlands Notice of Intent. • ❑ Treatment BMPs subject to the 44%TSS removal pretreatment requirement and the one inch rule for calculating the water quality volume are included, and discharge; • ❑ is within the Zone II or Interim Wellhead Protection Area • ❑ is near-or to other critical areas • • ❑ is within soils with a rapid infiltration rate(greater than 2.4 inches per hour) • ❑ involves runoff from land uses with higher potential pollutant loads. ❑ The Required Water Quality Volume is reduced through use of the LID site Design Credits. • ® Calculations documenting that the treatment train meets the 80%TSS removal requirement and, if applicable, the 44%TSS removal pretreatment requirement, are provided. • • • • F73866-Checklist for Stormwater Report 111008•04/01/08 Stormwater Report Checklist•Page 5 of 8 • • i Massachusetts Department of Environmental Protection Bureau of Resource Protection - Wetlands Program Checklist for Stormwater Report Checklist (continued) Standard 4: Water Quality(continued) ® The BMP is sized (and calculations provided) based on- The n: i ❑ The '/"or 1"Water Quality Volume or ® The equivalent flow rate associated with the Water Quality Volume and documentation is i provided showing that the BMP treats the required water quality volume. ® The applicant proposes to use proprietary BMPs, and documentation supporting use of proprietary BMP and proposed TSS removal rate is provided. This documentation may be in the form of the • propriety BMP checklist found in Volume 2, Chapter 4 of the Massachusetts Stormwater Handbook and submitting copies of the TARP Report, STEP Report, and/or other third party studies verifying performance of the proprietary BMPs. i ❑ A TMDL exists that indicates a need to reduce pollutants other than TSS and documentation showing • that the BMPs selected are consistent with the TMDL is provided. • Standard 5: Land Uses With Higher Potential Pollutant Loads (LUHPPLs) i ❑ The NPDES Multi-Sector General Permit covers the land use and the Stormwater Pollution • Prevention Plan (SWPPP) has been included with the Stormwater Report. ❑ The NPDES Multi-Sector General Permit covers the land use and the SWPPP will be submitted prior • to the discharge of stormwater to the post-construction stormwater BMPs. . ❑ The NPDES Multi-Sector General Permit does not cover the land use. ❑ LUHPPLs are located at the site and industry specific source control and pollution prevention i measures have been proposed to reduce or eliminate the exposure of LUHPPLs to rain, snow, snow • melt and runoff, and been included in the long term Pollution Prevention Plan. • ❑ All exposure has been eliminated. ❑ All exposure has not been eliminated and all BMPs selected are on MassDEP LUHPPL list. ❑ The LUHPPL has the potential to generate runoff with moderate to higher concentrations of oil and grease(e.g. all parking lots with >1000 vehicle trips per day) and the treatment train includes an oil S grit separator, a filtering bioretention area, a sand filter or equivalent. Standard 6: Critical Areas ❑ The discharge is near or to a critical area and the treatment train includes only BMPs that MassDEP i has approved for stormwater discharges to or near that particular class of critical area. ❑ Critical areas and BMPs are identified in the Stormwater Report. i • • F13866-Checklist for Storrnwater Report 111008•04101108 Storrnwater Report Checklist•Page 6 of 8 • • • Massachusetts Department of Environmental Protection . Bureau of Resource Protection - Wetlands Program Checklist for Stormwater Report Checklist (continued) Standard 7: Redevelopments and Other Projects Subject to the Standards only to the maximum extent practicable • ® The project is subject to the Stormwater Management Standards only to the maximum.Extent Practicable as a: ❑ Limited Project ❑ Small Residential Projects: 5-9 single family houses or 5-9 units in a multi-family development • provided there is no discharge that may potentially affect a critical area. ❑ Small Residential Projects: 2-4 single family houses or 2-4 units in a multi-family development with a discharge to a critical area ❑ Marina and/or boatyard provided the hull painting, service and maintenance areas are protected from exposure to rain, snow, snow melt and runoff • ❑ Bike Path and/or Foot Path 0 ® Redevelopment Project 0 ❑ Redevelopment portion of mix of new and redevelopment. 0 ® Certain standards are not fully met(Standard No. 1, 8, 9, and 10 must always be fully met) and an explanation of why these standards are not met is contained in the Stormwater Report. ® The project involves redevelopment and a description of all measures that have been taken to 0 improve existing conditions is provided in the Stormwater Report. The redevelopment checklist found • in Volume 2 Chapter 3 of the Massachusetts Stormwater Handbook may be used to document that the proposed stormwater management system (a)complies with Standards 2, 3 and the pretreatment 0 and structural BMP requirements of Standards 4-6 to the maximum extent practicable and (b) • improves existing conditions. • Standard 8: Construction Period Pollution Prevention and Erosion and Sedimentation Control 0 A Construction Period Pollution Prevention and Erosion and Sedimentation Control Plan must include the • following information: i • Narrative, • • Construction Period Operation and Maintenance Plan; • Names of Persons or Entity Responsible for Plan Compliance; 0 0 Construction Period Pollution Prevention Measures; 00 Erosion and Sedimentation Control Plan Drawings; • Detail drawings and specifications for erosion control BMPs, including sizing calculations, 0 • Vegetation Planning; • • Site Development Plan; • Construction Sequencing Plan; • Sequencing of Erosion and Sedimentation Controls, • • Operation and Maintenance of Erosion and Sedimentation Controls, • Inspection Schedule; 0 • Maintenance Schedule; 0 • Inspection and Maintenance Log Form. ® A Construction Period Pollution Prevention and Erosion and Sedimentation Control Plan containing • the information set forth above has been included in the Stormwater Report. • • F13866-Checklist for Stomwater Report 111008•04/01/08 Sto"water Report Checklist-Page 7 of 8 I&I 0 • • • Massachusetts Department of Environmental Protection • Bureau of Resource Protection -Wetlands Program Checklist for Stormwater Report • Checklist (continued) . Standard 8: Construction Period Pollution Prevention and Erosion and Sedimentation Control . (continued) • ❑ The project is highly complex and information is included in the Stormwater Report that explains why it is not possible to submit the Construction Period Pollution Prevention and Erosion and Sedimentation Control Plan with the application. A Construction Period Pollution Prevention and Erosion and Sedimentation Control has not been included in the Stormwater Report but will be submitted before land disturbance begins. ❑ The project is not covered by a NPDES Construction General Permit. • ® The project is covered by a NPDES Construction General Permit and a copy of the SWPPP is in the Stormwater Report. • ❑ The project is covered by a NPDES Construction General Permit but no SWPPP been submitted. . The SWPPP will be submitted BEFORE land disturbance begins. • Standard 9: Operation and Maintenance Plan • ® The Post Construction Operation and Maintenance Plan is included in the Stormwater Report and includes the following information: ® Name of the stormwater management system owners, • ® Party responsible for operation and maintenance; • ® Schedule for implementation of routine and non-routine maintenance tasks; • ® Plan showing the location of all stormwater BMPs maintenance access areas; • . ® Description and delineation of public safety features; ❑ Estimated operation and maintenance budget; and ® Operation and Maintenance Log Form. ❑ The responsible party is not the owner of the parcel where the BMP is located and the Stormwater • Report includes the following submissions: • ❑ A copy of the legal instrument(deed, homeowner's association, utility trust or other legal entity) that establishes the terms of and legal responsibility for the operation and maintenance of the project site stormwater BMPs; ❑ A plan and easement deed that allows site access for the legal entity to operate and maintain BMP functions. • Standard 10: Prohibition of Illicit Discharges ® The Long-Term Pollution Prevention Plan includes measures to prevent illicit discharges, • ❑ An Illicit Discharge Compliance Statement is attached; • ® NO Illicit Discharge Compliance Statement is attached but will be submitted prior to the discharge of any stormwater to post-construction BMPs. • • F73866-Checklist for Sto"water Report 111008•04/01/08 Sto"water Report Checklist•Page 8 of 8 • r OPERATION AND MAINTENANCE PLAN PROPOSED STORMWATER MANAGEMENT FACILITIES • RIVERVIEW PLACE SALEM, MASSACHUSETTS JANUARY 2008 • REVISED: NOVEMBER 2008 The following Operations and Maintenance Plan("O&M")has been prepared to ensure • that proposed systems function as designed. The O &M plan includes a maintenance schedule to ensure that structural and non-structural components are implemented properly and identifies the responsible parties. A brief summary of the specific BMP's to be implemented at the site are as follows: Non-Structural Methods • Site Layout Any maintained vegetated buffers disturbed during other site construction activities will • be stabilized upon completion of project activities. Source Control • A comprehensive source control program will be implemented at the site which includes regular pavement sweeping (at least four times per year), catch basin cleaning, and Stormceptor cleaning. Spill Prevention A spill prevention plan that includes an emergency notification plan and cleanup program will be developed as part of the National Pollution Discharge Elimination System • (NPDES) Construction General Permit. At a minimum the following good housekeeping practices will be followed on-site during construction: • 1. An effort will be made to store only enough product required to do the job. • 2. All materials stored on-site will be kept in a neat, orderly manner in their appropriate containers and, if possible, under a roof or other enclosure. i � O &M1 • Structural Methods A. Deep Sump Catch Basins • 1. During Construction a. Protect catch basins grates with hay bales, check dams until base paving course is installed and landscaped areas are stabilized . and/or vegetated. • b. Inspect basins monthly or following rainstorms of greater than one inch in 24 hours and clean when sediment levels are greater than twelve inches. 2. Long Term a. Inspect basins monthly and clean as necessary, but at least twice • annually. B. Stormceptor Unit e1. Maintain in accordance with Manufacturer's recommendations (copy • follows). The Stormceptor Unit shall be inspected at least four times • annually and after any spill event. The unit shall be maintained annually and immediately following any spill event. C. Snow Removal Snow removal and/or storage shall be conducted in accordance with the . Massachusetts DEP, Resource Protection Snow Disposal Guidance, effective • March 1, 2001. Snow shall not be stockpiled on the walkway adjacent to the North River nor on top of catch basins and shall not be dumped or pushed into the river. • Snow stockpile areas shall be designated prior to snowfall (but not later than December Is`) with orange plastic temporary fencing. Snow stockpile areas shall be cleaned of any debris not later than May 15a'. If snow exceeds the on-site storage capacity, it shall be removed to an approved off-site stockpile location. D. Erosion Control Procedures r 1. Staked hay bales, silt fence, temporary diversion swales and sediment • basins shall be installed in accordance with this plan or as otherwise • directed by the project engineer or the Conservation Commission prior to . O & M2 S commencement of construction activities. 20 additional hay bales and 100 ft. of silt fence shall be kept on site for repairs or other erosion control • needs. The contractor shall inspect erosion control facilities weekly and • after every rainfall event to confirm that same are properly functioning. Any deficiencies in the erosion control facilities shall be corrected immediately. 2. All soil stockpiles shall be protected against erosion utilizing erosion control barriers and/or crushed stone filter dikes. • 3. Catch basins shall be protected with filters, as shown on the plan, until no • sediment transport is visible during rainfall events. Filters shall be inspected weekly and maintained as necessary. 4. Temporary erosion control measures to be taken during construction shall • conform with the "Massachusetts Erosion and Sediment Control • Guidelines, Urban and Suburban Areas"dated March 1997, and may include some or all of the following measures: • • Temporary seeding • • Temporary mulching(straw) • Permanent seeding s • Hydroseeding • Sodding • Placement of hay or jute netting during winter months 5. Debris and/or litter shall be removed from the site on a weekly basis. t 6. If dust is generated during construction, it shall be controlled by use of water trucks, sprinkling or temporary stabilization methods. 7. At the completion of the project, all disturbed areas shall be permanently stabilized with loam and seed or other ground cover. All stormwater • BMP's shall be inspected and cleaned as necessary. Paved areas shall be swept. E. Bioretention Cells 1. Bioretention cells shall be constructed following all other-construction activities occurring near or on proposed cell locations. • 2. Inspection a. Cells shall be inspected monthly throughout the growing season and bi-weekly in the summer; inspection shall include examination of plants and ground cover for pest or disease problems as well as • sediment accumulation, erosion, mulch and overflow piping. O & M3 i 3. Maintenance i a. Clean sediment accumulation if more than one inch in depth; b. Repair any eroded areas; i C. Treat diseased vegetation as necessary; d. Remove and replace dead vegetation(April I s`—May 15`h and/or i September 151h —October 30t' ); ie. Remove any invasive species; f. Replace mulch every two years. i F. Porous Pavement Porous pavement surfaces are to be cleaned at least six times a year by vacuum • sweeping and pressure washed at least twice annually. No sanding shall be • allowed on porous pavement surfaces. A sign shall be posted identifying areas of porous pavements. No salting of porous pavement surfaces shall be permitted. i Porous pavements shall be inspected following rainfall events to confirm that i proper drainage is occurring and that no deterioration of the surface is occurring. Porous surfaces shall not be sealed or repaved with impermeable materials. • • G. Long Term Pollution Prevention Plan i 1. Good Housekeeping • • a. Inspect the site weekly, pickup and properly dispose of any trash; • debris or branches; b. Compost all landscape waste in an appropriate container or remove i from the site to an approved waste area; • C. Inspect paved areas for any signs of oil drippings and apply an absorbent agent to such immediately; • i d. Vacuum and sweep paved areas of site at least four times annually. i 2. Storage of Waste Materials • i Store any waste or recyclables in covered containers or a covered i dumpster and remove such materials from the site on a regular basis, but in no case less often than weekly. O & M4 • • • ! 3. Vehicle Washing No vehicle washing is to be done on site other than hand washing of vehicles owned by occupants of the residences. ! • 4. Inspect and maintain stormwater best management practices in accordance • with Sections A, B, E and F of this Operation and Maintenance Plan. ! 5. Spill Prevention and Response: • ! A spill prevention and response plan is included in the NPDES S"PP. • 6. Maintenance of landscaped areas shall be done utilizing off-site personnel: • Use of herbicides and pesticides shall be minimized. Low nitrogen • fertilizers will be used. Landscape maintenance supplies are not to be ! stored on site, except during actual landscape construction. Rain gardens shall be maintained in accordance with Section E of the Operation and Maintenance Plan. • • 7. Any observed pet waste will be cleaned up immediately and disposed of • with regular site trash. • 8. Snow management shall be in accordance with Section C of the Operation • and Maintenance Plan. • H. Notification of Future Property Owners as to Requirements for Maintenance of • Stormwater System. • A deed restriction will be placed on any conveyance of all units within the subject ! property referencing the requirements of this plan. • L Plan • The proposed storm drainage BMP's are shown on Sheets 4-6 of the Site ! Development Permit Plan. An as-built plan will accompany the request for a • Certificate of Compliance from the Salem Conservation Commission. ! • J. Operation and Maintenance Budget An operation and maintenance budget will be provided at the time of a request for • a Certificate of Compliance. • • • O&M5 • • • • • • K. Illicit Discharges • • No illicit discharges from the site shall be allowed to enter the storm drainage • system or the North,River. • • The party responsible for Operation and Maintenance of the Stormwater Management • Facilities is: • Riverview Place LLC • c/o Michael O'Brien • 6 Cider Mill Road Peabody, MA. 01960 • Tel: 978-979-4072 Or its heirs and assigns. • • • • • • • • • • • • • • • o • O &M6 • • • • • • • Redevelopment Checklist • Riverview Place Mason Street and Flint Street— Salem, Mass. • March 2008 • Existine Conditions • The site of Riverview Place consists of 4.3 acres of industrially developed land. It is • bounded on the west, in part, by Flint Street and, in part, by private residences along Flint • Street, to the north by private residences and Mason St., to the east by an industrial site owned by Mason Realty Trust and to the south by the North River and land of the • Commonwealth of Massachusetts. The major portion of the site is occupied by the so- called Salem Suede building and the Bonfanti building on Mason Street. • Those portions of the site not occupied by buildings are either paved or heavily • compacted gravel industrial yard areas. Soil are, at best, Hydrologic Group C or D and • underlain by fill materials. Some storage areas on site are land uses with higher pollutant • loads (auto repair and storage areas). Minimal, if any, stormwater facilities exist on site. • The site is directly tributary to the adjacent North River. • The Proiect •• The project proposes to demolish all existing facilities on site and redevelop the property for residential use and a small commercial component. • • Stormwater Management Standards • Standard 1: A new storm drainage outfall serving a newly constructed on-site • collection system is proposed. BMP's include parking lot sweeping, deep • sump hooded catch basins and Stormceptors. The bank of the North River • is currently stabilized by placed riprap or a timber bulkhead. • Standard 2: Peak Rate Control and Flood Prevention • • The Applicant requests that the Conservation Commission waive Standard • 2 since: • a. The site contains land subject to coastal storm flowage. • • b. Postdevelopment discharge rate characteristics will diminish • slightly due to improved surface characteristics. • Standard 3: Recharge to Groundwater • • • • • • Postdevelopment recharge conditions will improve slightly over • predevelopment conditions for the following reasons: a. Impervious or near impervious site coverages within the sub-basin will decrease from 4.85 to 4.15 acres. a b. Open space(landscaped) areas will increase on site to 1.15 acres. C. Assuming that appropriate subsurface soil conditions can be found to the southwest of the 22 unit building, roof recharge by use of • Stormtech infiltrators will be practiced for an appropriate portion • of the 22 unit building facing Mason Street. d. An area of porous pavement is proposed along the south boundary of the parking lot. It is proposed to fully evaluate subsurface soil conditions with respect to type of materials and 21E matters during the demolition phase and report the findings of those investigations together with any required site design • modifications relative to Standard 3 to the Salem Conservation • Commission. Standard 4: 80% TSS Removal The development proposal includes the following items in the source control section of the Operation and Maintenance Plan: • Sweeping of paved surfaces • • Snow management • • Management of lawn chemicals • • Stabilization of observed eroding surfaces All impervious areas on site will be new construction and routed through • deep sump catch basins and Stormceptors to achieve 80% TSS removal • for the first one-half inch of runoff. �- Standard 5: Higher Potential Pollutant Loads • The site is residential in character and thus not a land use with Higher Potential Pollutant Loads. Standard 6: Critical Areas • The proposed stormwater discharge is not into or near a critical area nor into an outstanding resource water nor public water supply areas. Standard 8: Erosion and Sediment Controls An erosion control plan is specified on Sheet 8 of the Site Development • Permit Plan. A NPDES Notice of Intent and SWPPP shall be prepared a and submitted prior to commencement of construction in accordance with Federal requirements. A draft of the S WPPP is included with the Notice of Intent. Standard 9: Operation and Maintenance An Operation and Maintenance Plan is included with the Stormwater Report. ` Standard 10: Illicit Discharges The property owner is of the opinion that any illicit discharges were • removed several years ago. No pipes were observed to be entering the • river from the site other than an apparent storm drain crossing the adjacent property of Mason Realty Trust. • The absence of illicit discharges will be confirmed during the demolition • phase. If any are encountered, such will be permanently discontinued by capping or removal. i � I • • • • • Demolition Plan Riverview Place—Salem, Mass. • March 2008 • Site preparation of the property upon which Riverview Place is proposed would include • demolition of all structures on the site. The general location of those structures is shown on Sheet 2 of the Site Development Permit Plans. Prior to undertaking any demolition activities, the following steps must be completed: • 1. Approval of Salem Historical Society since most of the structures on site are more • than 50 years old. 2. Performance of a preliminary demolition inspection by the Salem Fire • Department(SFPR#29C). 3. Utility survey as to water and sewer lines serving the site in accordance with the requirements of the City of Salem Department of Public Services. • • 4. Disconnection of all services discovered in Item 3 in accordance with the • requirements of the Salem Department of Public Services. • 5. Notify all other utility agencies with facilities servicing the lot to secure required releases under Section 116.1 of the Massachusetts State Building Code. • 6. Secure Building Demolition Permit. • • Discussions have been conducted with a representative of a potential demolition • contractor for the project as to specific procedures which would be followed in the • demolition of the Salem Suede building with particular emphasis on avoiding introduction of demolition materials into the North River. • The following general approach is recommended: o Demolition of the existing building will proceed from northwest to southeast. This will allow the building to be constantly pulled into the site and not toward • the river. • • • As work approaches the river(the last 100 feet of building), a boom system will be installed to contain any material which might inadvertently get into the river. • The upper two floors of the building are of wood construction and the lower two floors of masonry construction. • • • In addition to the boom system, personnel will be stationed next to the river so • that any material entering the waterway can be removed immediately. • • • • + • The bulk demolition will be done with track excavators. • Staging areas will be maintained more than 100 feet from the river for temporary stockpiling of demolition materials or recyclable demolition materials until such can be removed from the site. Such stockpiles will be protected by erosion • control barriers until removed from the site. • A silt barrier, as shown on Sheet 2, will be installed prior to start of demolition ' activities and inspected daily as to its stability and condition. Any required repairs will be made immediately. • Dust control will be accomplished by wetting. The demolition contractor shall coordinate with the City as to the water source (i.e. metered hydrant use vs. • trucked supply). W, • Stormceptor' Inspection and Maintenance. as ® Convenient. When it rains, oils, sediment and other contaminants are captured and contained by over 20,000 Stormceptor units operating worldwide. While Stormceptor's patented scour prevention technology ensures captured pollutants remain in the unit during all rainfall events, the accumulated pollutants must eventually be • removed as part of a regular maintenance program. If neglected, oil and sediment gradually build up and diminish any I BMPs efficiency, harming the environment and leaving owners and operators vulnerable to fines, surcharges and bad publicity. Maintenance is a must Ease, frequency and cost of maintenance are often overlooked by specifiers when considering the merits of a stormwater treatment • system. In reality, maintenance is fundamental to the long-term • performance of any stormwater quality treatment device. While regular maintenance is crucial, it shouldn't be complicated. An ongoing maintenance program with Stormceptor is convenient and practically effortless. With virtually no disruptions, you can concentrate on your core business. Quick inspections Inspections are easily carried out above ground from any standard surface access cover through a visual inspection of the orifice and drop tee components. A sludge judge and oil dip-stick are all that are needed for sediment and oil depth measurements. Easy unit access Maintenance is typically conducted from the same surface access cover, eliminating the need for confined space entry into the unit. Your site remains undisturbed, saving you time and money. imbrium I • • a No muss, no fuss and fast Maintenance is performed quickly and inexpensively with a standard vacuum truck. Servicing usually takes less than two hours, with no disruption to your site. U • A complete stormwater management plan for Stormceptor extends beyond installation and performance to regular maintenance. It's the smart, cost-effective way to ensure your unit continues to remove more pollutants than any other separator for decades to come. Stormceptor maintenance recommendations • Units should be inspected post-construction, prior to being put into service. • Inspect every six months for the first year of operation to determine the oil andsediment accumulation rate. • In subsequent years, inspections can be based on first-year observations or local • requirements. • Cleaning is required once the sediment depth reaches 15% of storage capacity, (generally taking one year or longer). Local regulations for maintenance frequency may vary. • Inspect the unit immediately after an oil, fuel or chemical spill. . • A licensed waste management company should remove captured petroleum waste products from any oil, chemical or fuel spills and dispose responsibly. With over 20,000 units operating worldwide, Stormceptor performs and protects every day, in every storm. r imbreum f 111 t,i- >3: • Table 2. Stormce for Capacities Model Model Sediment Oil Total Holding (Metric) (US) Capacity Capacity Capacity L(US gal) L(US gal) L(US gal) • 300 450 1275 335) 325 (85) 1775 470) 750 900 2460 565 915 (280) 4325 950) 1000 1200 3260 845 915 280 5125 1230 1500 1800 5660 (1445) 915 280) 7525 (1830) 2000 2400 6150 1345) 2945 (880) 10925 2495) 3000 3600 10415 2600 2945 880 15195 3750 4000 4800 14060 3475 3490 1025 20180 5020 5000 6000 18510 (4550) 3490 (1025) 24635 (6095) 6000 7200 23445 5425) 4150 110031210 C7415) Identification Even if you do not have plans of your stoiin drain system you will be able to easily identify where the inline Stormceptor unit(s) (spool or disc insert) are since the name STORMCEPTOR is clearly embossed on the cover. You will be able to determine the location of"inlet" Stotmceptor units with horizontal catch basin inlets by looking down the grate since the insert will be visible. The name Stormceptor is not embossed on the inlet models due to the variability of inlet grates usedlapproved across North America • Once you have found the unit, you may still be uncertain which model number it is. Comparing the • measured depth freta the water level (bottom of usert)to the bottom of the tank with Table I shouldhelp determine the size of the unit • Starting in 1996, a metal serial number tag has been affixed to the inside of the unit.The serial number has • the model number written on it If the unit does not have a serial number, or if there is any uncertainty -." - the size of the int& -tor usiii d-"th measutcineats, -lease contact St6fm6ept& at 1 800 565- 4801 -- g eP � - --- p --- -- -- 4801 and we will help you determine the size of a particular unit What is the Maintenance Procedure? +♦ Maintenance of Stornceptor is performed using vacuum trucks. No entry into the unit is required for • maintenance of the spool insert, inlet insert or the smaller disc inserts. Entry to the level of the disc insert. • may be required for servicing the larger disc insert models. DO NOT ENTER THE STORMCEPTOR CHAMBER unless you have the proper equipment, have been trained and are qualified to enter a confined space, as identified by local Occupational Safety and Health Regulations(e.g. • Canada Occupational Safety and Health Regulations — SOR/86-304). Without the proper equipment and tmrnrrrg, entry into confined spaces can result in serious bodily harm and potentially dear. Consult local, provincial, and/or state regulations to determine the requirements for confined space entry. Be aware that the insert may be slippery. In addition, be aware that some units do not have a safety grate to cover the • outlet riser pipe that leads to the submerged, lower treatment chamber. • Stormceptor w The Vacuum Service Industry is a well-established sector of the service industry that cleans underground itanks, sewers and catch basins. Costs to clean a Stormceptor® will vary based on the size of unit and . transportation distances. The depth of oil in the interceptor can be determined by inserting a dipstick tube in the 150 mm (6") oil • inspection/cleanout pipe("disc"design), or in the 914 mm(36'�central access way("spool" design), or in the 100 nun(4")cleanout pipe • ("inlet'design). • Similarly, the depth of sediment can be measured from the surface without entry into the Stormceptor via • a dipstick tube equipped with a ball valve (Sludge Judge). This tube would be inserted in the central opening ( _ — - - -- — . ("spool" design)or in the 61D mm(24") opening("dish" design), or in the 100 mm (4") cleanout pipe ("inlet" design). Maintenance should be performed once the sediment depth exceeds the guideline • values provided in Table 3. • For the "spool" design Stormceptor maintenance is performed through the large central 914 mm (36") diameter opening for both the oil and the sediment In the "disc"design, oil is removed through the 150 mm (6") oil fiLVection/cleanout pipe and sediment is removed through the 610 mm (24") diameter outlet • riser pipe. Alternatively, oil could be removed from the 610 mm (24") opening if water is removed from the lower chamber to lower the oil level to the level of the drop pipes. For the "inlet"design,maintenance is performed through the 305mm (12') inlet drop pipe for the sediment, and oil can be removed from the 100 mm(4")oil/inspection cleanout pipe. We recommend the following procedure to clean out the Stormceptor. 1. Check for oil(using a dipstick tulle) 2. Remove any oil separately using a small portable pump 3. Decant the water from the unit to the sanitary sewer using a portable pump (prior approval is required from the sewer authority/municipality) 4. Remove the sludge from the bottom of the unit using a vacuum truck • 5. Re-fill the Stormceptor with water where required by the local jurisdiction How Often Is Maintenance Required? • Generally, annual maintenance is recommended but the required maintenance frequency will vary with the • amount of pollution on your site (number of hydrocarbon spills, amount of sediment, etc.). It is recommended that the frequency of maintenance be increased or reduced based on local conditions. If the • sediment load is high,maintenance may be required semi-annually. Conversely once the site has stabilized, • maintenance may be required less frequently. Maintenance should be performed immediately after an oil • spill or once the sediment depth in Storraceptor reaches the value specified in Table 3 based on the unit size. . In the "disc" design and "inlet' design, any potential obstructions at the inlet can be observed from the • surface. The "disc" insert has been designed as a platform to facilitate maintenance of the Stormceptor and the storm drain system. • Stormceptor Table 3. Sediment Depths Indicating Required Maintenance . Model Model Sediment Depth • (Metric) (US) mm in. 300 450 200 8 750 900 200 (8) 1000 1200• 250(10) • 1500 1800 375 15 • 2000 2400 300 12 3000 3600 425 (17 4000 4800 375 (15) 5000 6000 450 18 • 6000 7200 375 15 What Should I do in the Fveni of an Oil Spill? Stormceptor® is often implemented in areas where the potential for spills is great. Stormceptor should be cleaned immediately after a spill occurs by a licensed liquid waste hauler. You should also notify the appropriate regulatory agencies as required in the event of a spill. Disposal of the Trapped Material Removed from Stormceptor • The requirements for the disposal of material from Stormceptor are similar to that of any other Best . Management Practices (BMP). Local guidelines should be consulted prior to disposal of the separator • contents. • In most areas the sediment,once dewatered,can be disposed of in a sanitary landfill. It is not anticipated . that the sediment would be classified as hazardous waste. In some areas, mixing the water with the sediment will create a slurry that can be discharged into a trunk sanitary sewer. In all disposal options, approval from the dsposal facility operator/agency is required. Petroleum waste products collected in Stormceptor(oil/chemical/fuel spills)should be removed by a licensed waste management company. What if I see an oil rainbow or sheen at the Stormceptor outlet? With a steady influx of water with high concentrations of oil,a sheen may be noticeable at the Stormceptor outlet. This may occur because a rainbow or sheen can be seen at very small oil concentrations(< 10 ppm). Stormceptor will remove over 95%of all free oil and the appearance of a sheen at the outlet with high influent oil concentrations docs not mean that the unit is not woriang to this level of removal. In addition,if the influent oil is emulsified,the Stormceptor will not be able to remove it. The Storinceptor is designed for free oil removal and not emulsified or dissolved oil conditions. • Stormceptor