A. 
An erosion and sediment control plan is required at the time of application for all projects, unless the requirement has been waived. Plan approval by the Planning Board or its agent is required prior to any site-altering activity. The plan shall be designed to ensure compliance with these regulations, the Small MS4 General Permit, the Massachusetts Soil Erosion and Sediment Control Guidelines for Urban and Suburban Areas, as amended, and, if applicable, the NPDES General Permit for Stormwater Discharges from Construction Activities. In addition, the plan shall ensure that the Massachusetts Surface Water Quality Standards (314 CMR 4.00) are met in all seasons.
B. 
If a project requires a stormwater pollution prevention plan (SWPPP) per the NPDES General Permit for Stormwater Discharges from Construction Activities, then the applicant is required to submit a complete copy of the SWPPP (including the signed notice of intent and approval letter) as part of its application for a LDP. If the SWPPP meets the requirements of the NPDES General Permit, it will be considered equivalent to the erosion and sediment control plan described in this section.
A. 
The erosion and sediment control plan shall contain sufficient information to describe the nature and purpose of the proposed development, pertinent conditions of the site and the adjacent areas, and proposed erosion and sedimentation controls. The applicant shall submit such material as is necessary to show that the proposed development will comply with the design criteria listed in § 250-26.
B. 
Site plans included with the erosion and sediment control plan shall be prepared on twenty-four-inch by thirty-six-inch sheets and shall include a title, date, North arrow, names of abutters, scale (one inch equals 20 feet or one inch equals 40 feet), legend, and locus map (one inch equals 800 feet). Revised plans shall contain a notation listing and describing all revisions, additions, and deletions made to the originally submitted plans and the date of each.
C. 
The erosion and sediment control plan shall remain on file with the Planning Board. Refer to the latest version of the Massachusetts Erosion and Sediment Control Guidelines for Urban and Suburban Areas for detailed guidance.
D. 
For larger developments where construction phasing occurs, the erosion and sediment control plan shall be updated as needed based on changing conditions at the site.
E. 
The erosion and sediment control plan shall include, at a minimum, the following in narrative and drawings:
(1) 
Names, addresses, and telephone numbers of the owner, applicant, and person(s) or firm(s) preparing the plan;
(2) 
Title, date, North arrow, names of abutters, scale, legend, and locus map;
(3) 
Location and description of natural features including:
(a) 
Watercourses and water bodies, wetland resource areas and all floodplain information, including the 100-year flood elevation based upon the most recent Flood Insurance Rate Map, or as calculated by a registered professional engineer (PE) for areas not assessed on these maps;
(b) 
Existing vegetation, including tree lines, canopy layer, shrub layer, and ground cover, and trees with a caliper 12 inches or larger, noting specimen trees and forest communities; and
(c) 
Habitats mapped by the Massachusetts Natural Heritage and Endangered Species Program as endangered, threatened or of special concern, estimated habitats of rare wildlife and certified vernal pools, and priority habitats of rare species within 500 feet of any construction activity.
(4) 
Lines of existing abutting streets showing drainage and driveway locations and curb cuts;
(5) 
Existing soils, volume and nature of imported soil materials;
(6) 
Topographical features, including existing and proposed contours at intervals no greater than two feet with spot elevations provided when needed;
(7) 
Surveyed property lines showing distances and monument locations, all existing and proposed easements, rights-of-way, and other encumbrances, the size of the entire parcel, and the delineation and number of square feet of the land area to be disturbed;
(8) 
Drainage patterns and approximate slopes anticipated after major grading activities (construction phase grading plans);
(9) 
Location and details of temporary and permanent erosion and sediment control measures with a narrative of the construction sequence/phasing of the project, including both operation and maintenance for structural and nonstructural measures, interim grading, and material stockpiling areas;
(10) 
Path and mechanism to divert uncontaminated water around disturbed areas, to the maximum extent practicable. When determining whether the requirements have been met, the Planning Board shall consider all stormwater management practices available and capable of being implemented after taking into consideration costs, existing technology, proposed use, and logistics in light of overall project purposes. Project purposes shall be defined generally (e.g., single-family home or expansion of a commercial development);
(11) 
A maintenance schedule for the period of construction;
(12) 
Measures used to maintain the infiltration capacity of existing soils where any kind of infiltration is proposed.
(13) 
Measures to minimize, to the extent practicable, off-site vehicle tracking of sediments onto paved surfaces and the generation of dust;
(14) 
Proposed dewatering operations, including proposed locations of discharge;
(15) 
Location and description of industrial discharges, including stormwater discharges from dedicated asphalt plants and dedicated concrete plants, which are covered by this permit;
(16) 
Stormwater runoff calculations in accordance with the Massachusetts Department of Environmental Protection's Stormwater Management Handbook and Stormwater Standards;
(17) 
Location and description of and implementation schedule for temporary and permanent seeding, vegetative controls, and other stabilization measures;
(18) 
A description of construction and waste materials expected to be stored on-site. The plan shall include a description of controls to reduce pollutants from these materials, including storage practices to minimize exposure of the materials to stormwater, and spill prevention and response;
(19) 
A description of provisions for phasing the project where one acre of area or greater is to be altered or disturbed;
(20) 
Plans must be stamped and certified by a qualified professional engineer registered in Massachusetts or a certified professional in erosion and sediment control; and
(21) 
Such other information as is required by the Planning Board.
A. 
The erosion and sediment control plan shall be designed to comply with the Small MS4 General Permit and to meet the following criteria and guidelines:
(1) 
Minimize total area of disturbance.
(2) 
Minimize peak rate of runoff in accordance with the Massachusetts Department of Environmental Protection Stormwater Standards.
(3) 
Minimize soil erosion and control sedimentation during construction.
(4) 
Divert uncontaminated water around disturbed areas.
(5) 
Maximize groundwater recharge.
(6) 
Install and maintain all erosion and sediment control measures in accordance with the Massachusetts Erosion and Sedimentation Control Guidelines for Urban and Suburban Areas, manufacturers' specifications and good engineering practices.
(7) 
Incorporate appropriate BMPs designed to comply with the Massachusetts Stormwater Handbook.
(8) 
Prevent off-site transport of sediment.
(9) 
Protect and manage on- and off-site material storage areas. (Overburden and stockpiles of dirt, borrow areas, or other areas used solely by the permitted project are considered a part of the project.)
(10) 
Comply with applicable federal, state and local laws and regulations, including waste disposal, sanitary sewer or septic system regulations, and air quality requirements, including dust control.
(11) 
Protect natural resources and prevent significant alteration of habitats mapped by the Massachusetts Natural Heritage and Endangered Species Program as endangered, threatened or of special concern, estimated habitats of rare wildlife and certified vernal pools, and priority habitats of rare species from the proposed activities.
(12) 
Institute interim and permanent stabilization measures, which shall be instituted on a disturbed area as soon as practicable but no more than 14 days after construction activity has temporarily or permanently ceased on that portion of the site.
(13) 
Properly manage on-site construction and waste materials, including truck washing and cement concrete washout facilities.
(14) 
Site plans should ensure that existing vegetation is preserved where possible and that disturbed portions of the site are stabilized. Use of impervious surfaces for stabilization should be avoided.
(15) 
Prior to any land disturbance activities commencing on the site, the developer shall physically mark limits of no land disturbance on the site with tape, signs, or orange construction fence, so that workers can see the areas to be protected. The physical markers shall be inspected daily.
(16) 
Appropriate erosion and sediment control measures shall be installed prior to disturbance and maintained in accordance with the manufacturer's specifications and good engineering practices to ensure they perform as intended. Sediment in runoff water shall be trapped and retained within the project area. Wetland areas and surface waters shall be protected from sediment.
(17) 
Sediment trapping and settling devices shall be employed to trap and/or retain suspended sediments and allow time for them to settle out in cases where perimeter sediment controls (e.g., silt fence and hay bales) are deemed to be ineffective in trapping suspended sediments on-site. Sediment basins shall also be used to minimize peak rate of runoff in accordance with the Massachusetts Stormwater Standards.
(18) 
BMPs to be used for infiltration after construction shall not be used as BMPs during construction unless otherwise approved by the Board. Many infiltration technologies are not designed to handle the high concentrations of sediments typically found in construction runoff, and thus must be protected from construction-related sediment loadings.
(19) 
Sediment shall be removed once the volume reaches 1/4 to 1/2 the height of a hay bale. Sediment shall be removed from silt fence prior to reaching the load-bearing capacity of the silt fence which may be lower than 1/4 to 1/2 the height.
(20) 
Sediment from sediment traps or sedimentation ponds shall be removed when it reaches a depth of six inches.
(21) 
Erosion and sediment controls shall be coordinated with the sequence of grading, development and construction operations; control measures shall be in effect prior to commencement of each increment/phase of the process and control measures from prior phases shall continue to be maintained until the site is stabilized.
(22) 
Land disturbance activities exceeding two acres in size shall not be disturbed without a sequencing plan that requires stormwater controls to be installed and the soil stabilized, as disturbance beyond the two acres continues. Mass clearings and grading of the entire site should be avoided. Prior to any construction on the site, the applicant shall submit a construction phasing plan to the Planning Department for review and approval.
(23) 
Soil and other materials shall not be stockpiled or redistributed, either temporarily or permanently, in locations or in such a manner as would cause suffocation of tree root systems.
(24) 
Topsoil shall be stripped from disturbed areas, stockpiled in approved areas and stabilized with temporary vegetative cover if it is to be left for more than 30 calendar days; perimeter sediment controls shall be installed around each area of stockpiled topsoil.
(25) 
Soil stockpiles must be stabilized or covered at the end of each workday. Stockpile side slopes shall not be greater than 2:1. All stockpiles shall be surrounded by sediment controls.
(26) 
Projects must comply with applicable federal, state and local laws and regulations, including waste disposal, sanitary sewer or septic system regulations, and air quality requirements, including dust and debris control.
(27) 
Prevent off-site vehicle tracking of sediments. A tracking pad shall be constructed at all entrance/exit points of the site to reduce the amount of soil carried onto roadways and off the site.
(28) 
Dust shall be controlled at the site.
(29) 
On the cut side of roads, ditches shall be stabilized immediately with rock riprap or other nonerodible liners or, where appropriate, vegetative measures, such as sod.
(30) 
All graded areas beyond the street right-of-way shall be covered with four inches of topsoil and planted with a native species of vegetative cover, sufficient to prevent erosion.
(31) 
Temporary seeding, mulching or other suitable stabilization methods shall be used to protect exposed soil areas during construction; as feasible, natural vegetation shall be retained and protected; during the months of October through March, when seeding may be impractical, an anchored mulch or sod shall be applied as approved by the Planning Board or by its designee; diversions and/or prepared outlets may be required in critical areas during construction.
(32) 
Permanent seeding shall be undertaken in the spring from March through May, and in late summer and early fall from August to October 15. During the peak summer months and in the fall after October 15, when seeding is found to be impractical, appropriate temporary mulch shall be applied. Permanent seeding may be undertaken during the summer if plans provide for adequate mulching and watering.
(33) 
Permanent vegetation and erosion control structures, as necessary, shall be installed, preferably immediately after construction is completed but otherwise no later than the first full spring season immediately thereafter. They shall comply with the erosion and sedimentation vegetative practices recommended by the U.S. Natural Resources Conservation Service.
(34) 
Native species shall be used for revegetation.
(35) 
Slopes (greater than 3:1) shall be protected from erosion by limiting clearing of these areas in the first place or, where grading is unavoidable, by providing special techniques to prevent upland runoff from flowing down a steep slope and through immediate stabilization to prevent gullying. Off-site runoff shall be diverted from highly erodible soils and steep slopes to stable areas.
(36) 
Interim and permanent stabilization measures shall be instituted on a disturbed area immediately after construction activity has temporarily or permanently ceased on that portion of the site. Two methods are available for stabilizing disturbed areas: mechanical (or structural) methods and vegetative methods. In some cases, both are combined in order to retard erosion.
(37) 
Temporary sediment trapping devices must not be removed until permanent stabilization is established in all contributory drainage areas. Similarly, stabilization shall be established prior to converting sediment traps/basins into permanent (post-construction) stormwater management facilities. All facilities used as temporary measures shall be cleaned prior to being put into final operation.
(38) 
All temporary erosion and sediment control measures shall be removed after final site stabilization. Disturbed soil areas resulting from the removal of temporary measures shall be permanently stabilized within 30 days of removal.