All site plan review and subdivision applications must submit
the following information and shall comply with the following standards:
A. Apply best management practices that accommodate the increased runoff
caused by changed soil and surface conditions during construction,
including strong perimeter controls and soil stabilization methods.
Sediment in stormwater runoff shall be contained by the use of sediment
basins or other acceptable methods until the disturbed area is stabilized.
Techniques that divert upland runoff away from disturbed slopes shall
be used.
B. Identify, locate, and show elevation, grades and/or contours at intervals
of not more than two feet for the existing and proposed drainageways,
drainage easements, drainage structures, and any surface water bodies.
C. Identify and relatively locate and include drawings and specifications
for each erosion and sediment control measure and structure proposed
during construction, noting those measures that will become permanent
structures retained after construction. Erosion and sediment control
measures and structures shall be designed in accordance with the New
Hampshire Stormwater Manual Volume 3: Erosion and Sediment Controls
During Construction (New Hampshire Department of Environmental Services,
December 2008, as amended) or new standards and guidance as released
or adopted by the New Hampshire Department of Environmental Services.
D. Include drawings, details and specifications for proposed flood hazard
prevention measures and structures and for proposed temporary stormwater
management facilities.
E. Ensure that disturbance to or removal of vegetation, grading or other
construction will be done in such a way that will minimize soil erosion.
Whenever practical, natural vegetation shall be retained, protected
and supplemented to function as buffers.
F. Construction sites must be stabilized within five days of clearing
or inactivity in construction. Temporary application of seed and/or
mulch may be required by the Planning Board to protect exposed critical
areas during development. Techniques shall be employed to prevent
the blowing of dust or sediment from the site. In areas where final
grading has not occurred, temporary stabilization measures should
be in place within seven days for exposed soil areas within 100 feet
of a surface water body or wetland and no more than 14 days for all
other areas. Permanent stabilization should be in place no more than
three days following the completion of final grading of exposed soil
areas. At the close of the construction season, the entire site must
be stabilized, using a heavy mulch layer, or another method that does
not require germination to control erosion.
G. Waste removal and disposal.
(1)
All waste generated on the site shall be controlled and discarded
properly, including but not limited to building materials, concrete
and concrete washout effluent, chemicals, litter and sanitary wastes.
(2)
Waste shall not be discharged to the municipal MS4 system.