No application for approval of land development activity shall
be reviewed until the Stormwater Management Officer has received a
stormwater pollution prevention plan (SWPPP) prepared in accordance
with the specifications in this chapter.
A.
All SWPPPs shall provide the following background information and
erosion and sediment controls:
(1)
Background information about the scope of the project, including
location, type and size of project;
(2)
Site map/construction drawing(s) for the project, including a general
location map. At a minimum, the site map should show the total site
area; all improvements; areas of disturbance; areas that will not
be disturbed; existing vegetation; on-site and adjacent off-site surface
water(s); wetlands and drainage patterns that could be affected by
the construction activity; existing and final slopes; locations of
off-site material, waste, borrow or equipment storage areas; and location(s)
of the stormwater discharge(s). Maps shall be of a scale no smaller
than one inch equals 50 feet;
(3)
Description of the soil(s) present at the site;
(4)
Construction phasing plan describing the intended sequence of construction
activities, including clearing, grubbing, excavation and grading,
utility and infrastructure installation and any other activity at
the site that results in soil disturbance. Consistent with the New
York Standards and Specifications for Erosion and Sediment Control
(Erosion Control Manual), not more than two acres shall be disturbed
at any one time unless pursuant to an approved SWPPP;
(5)
Description of the pollution prevention measures that will be used
to control litter, construction chemicals and construction debris
from becoming a pollutant source in stormwater runoff;
(6)
Description of construction and waste materials expected to be stored
on-site with updates as appropriate, and 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;
(7)
Temporary and permanent structural and vegetative measures to be
used for soil stabilization, runoff control and sediment control for
each stage of the project from initial land clearing and grubbing
to project closeout;
(8)
A site map/construction drawing(s) specifying the location(s), size(s)
and length(s) of each erosion and sediment control practice;
(9)
Dimensions, material specifications and installation details for
all erosion and sediment control practices, including the siting and
sizing of any temporary sediment basins;
(10)
Temporary practices that will be converted to permanent control measures;
(11)
Implementation schedule for staging temporary erosion and sediment
control practices, including the timing of initial placement and duration
that each practice should remain in place;
(12)
Maintenance schedule to ensure continuous and effective operation
of the erosion and sediment control practice;
(13)
Name(s) of the receiving water(s);
(14)
Delineation of SWPPP implementation responsibilities for each part
of the site;
(15)
Description of structural practices designed to divert flows from
exposed soils, storm flows, or otherwise limit runoff and the discharge
of pollutants from exposed areas of the site to the degree attainable;
and
(16)
Any existing data that describes the stormwater runoff at the site.
B.
Land development activities as defined in § 150-3 of this chapter and meeting Condition A, B or C below shall also include water quantity and water quality controls (postconstruction stormwater runoff controls) as set forth in Subsection C below as applicable:
(1)
Condition A: stormwater runoff from land development activities discharging
a pollutant of concern to either an impaired water identified on the
Department's 303(d) list of impaired waters or a total maximum daily
load (TMDL) designated watershed for which pollutants in stormwater
have been identified as a source of the impairment.
(2)
Condition B: stormwater runoff from land development activities disturbing
two or more acres.
(3)
Condition C: stormwater runoff from land development activity disturbing
between one acre and two acres of land during the course of the project,
exclusive of the construction of single-family residences and construction
activities at agricultural properties.
C.
SWPPP requirements for Conditions A, B, and C:
(2)
Description of each postconstruction stormwater management practice;
(3)
Site map/construction drawing(s) showing the specific location(s)
and size(s) of each postconstruction stormwater management practice;
(4)
Hydrologic and hydraulic analysis for all structural components of
the stormwater management system for the applicable design storms;
(5)
Comparison of postdevelopment stormwater runoff conditions with predevelopment
conditions;
(6)
Dimensions, material specifications and installation details for
each postconstruction stormwater management practice;
(7)
Maintenance schedule to ensure continuous and effective operation
of each postconstruction stormwater management practice;
(8)
Maintenance easements to ensure access to all stormwater management
practices at the site for the purpose of inspection and repair. Easements
shall be recorded on the plan and shall remain in effect with transfer
of title to the property;
The SWPPP shall be prepared by a landscape architect, certified
professional or professional engineer and must be signed by the professional
preparing the plan, who shall certify that the design of all stormwater
management practices meet the requirements of this chapter.
A.
The applicant shall assure that all other applicable environmental
permits have been or will be acquired for the land development activity
prior to approval of the final stormwater design plan.
B.
A copy of the SWPPP shall be retained at the site of the land development
activity during construction from the date of initiation of construction
activities to the date of final stabilization.
C.
The certification statement(s) shall become part of the SWPPP for
the land development activity.
