Current through Register Vol. 56, No. 18, September 16, 2024
(a) The regional stormwater management plan
shall include a characterization and assessment that addresses the following
components, unless the committee determines that a component is not appropriate
for the regional stormwater management planning area and provides a rationale
for not including the component:
1. Maps
showing the following information. Maps developed on a Geographical Information
System shall meet the Digital Data standards in N.J.A.C. 7:1D unless a
rationale for a different format is provided.
i. The regional stormwater management
planning area boundary;
ii.
Existing land uses;
iii. Projected
land uses assuming full development under existing zoning;
iv. Soil mapping units based on the detailed
soil maps in County Soil Surveys published by the U.S. Department of
Agriculture or, in areas for which County Soil Surveys are not available, on
information obtained from Soil Conservation Districts;
v. Topography based on the U.S. Geological
Survey Topographic Map, 7.5 minute quadrangle series, or other sources of
information depicting topography in similar or greater detail;
vi. Water bodies based on detailed map sheets
in County Soil Surveys published by the U.S. Department of Agriculture; the
U.S. Geological Survey Topographic Map, 7.5 minute quadrangle series; or other
sources of information depicting water bodies in similar or greater
detail;
vii. Coastal wetlands based
on maps prepared by the Department under the Wetlands Act of 1970, N.J.S.A.
13:9A-1 et seq., and freshwater wetlands based on maps prepared by the
Department under the Freshwater Wetlands Protection Act, N.J.S.A. 13:9B-1 et
seq.;
viii. Flood hazard areas
based on delineations made by the Department under the Flood Hazard Area
Control Act, N.J.S.A. 58:16A-50 et seq. For a water body for which the
Department has not delineated the flood hazard area, a map of the flood hazard
area prepared in accordance with N.J.A.C. 7:13 is acceptable;
ix. Groundwater recharge areas and well head
protection areas based on maps prepared by the Department or ordinances of an
affected municipality;
x.
Environmentally constrained areas and environmentally critical areas;
xi. River areas designated under the New
Jersey Wild and Scenic Rivers Act, N.J.S.A. 13:8-45 et seq., or the Federal
Wild and Scenic Rivers Act,
16 U.S.C. §§
1278. et seq.;
xii. For each waterbody in the regional
stormwater management planning area, identification of the waterbody or
waterbody segment, the drainage area, and the classification of the waterbody
pursuant to
N.J.A.C.
7:9B-1.15;
xiii. Each waterbody designated as a water
quality limited surface water pursuant to N.J.A.C. 7:15-5;
xiv. Man-made stormwater conveyance, storage
and discharge systems, including municipal separate storm sewer outfall pipes
and the drainage areas as appropriate for these outfall structures;
and
xv. Source water areas of
potable public surface water supply intakes and public water supply reservoirs
available on the Department's webpage at www.nj.gov/dep/swap;
2. A map showing jurisdictional
boundaries within the regional stormwater management planning area of
municipal, county, and other agencies with responsibility for implementing
stormwater management;
3.
Identification of the physical characteristics of the regional stormwater
management planning area pertinent to stormwater management, such as slopes,
swales and impoundment areas as necessary for completing the analysis in
N.J.A.C. 7:8-3.4(a)4;
4. A water
quality, groundwater recharge and water quantity hydrologic and hydraulic model
or analysis of the regional stormwater management planning area which addresses
existing land uses and projected land uses assuming full development under
existing zoning and taking into account permanently preserved lands;
5. An identification and evaluation of
existing municipal, county, State, Federal, and other stormwater-related
groundwater recharge, water quality, and water quantity regulations and
programs shall be conducted, including, where applicable, programs to develop
total maximum daily loads (TMDLs) in accordance with N.J.A.C. 7:15-5;
and
6. A summary of information
that has been identified as useful for purposes of stormwater management
planning but that is not available for technical, financial, or other
reasons.
(b) The
Department encourages the use of existing information to the extent that it is
available to minimize the cost of data acquisition, such as information
available on the Department's Geographical Information System website (www.state.nj.us/dep/gis) or as
developed through a watershed planning process.
(c) The characterization and assessment shall
include information on locations and activities outside the regional stormwater
management planning area that drain into the planning area (for example,
stormwater originating in an adjacent drainage area that is transferred to the
stormwater management planning area).
(d) Using the modeling or other information
obtained under (a) through (c) above, the stormwater-related water quality
impacts of existing land uses and projected land uses assuming full development
under existing zoning shall be identified and ranked in accordance with the
following process:
1. Inventory existing and
potential stormwater-related pollutant sources and stormwater-related
pollutants in the regional stormwater management planning area.
i. Stormwater-related pollutant sources
include, for example, urban and suburban development, roads, storm sewers,
agriculture, mining, and waterfront development.
ii. Stormwater-related pollutants include,
for example, nutrients, pathogens, hydrocarbons, metals, pesticides, sediments,
and suspended solids;
2.
For surface water bodies and/or segments thereof and aquifers and/or portions
thereof in the regional stormwater management planning area, identify and
describe the existing or designated uses that are or may be adversely affected
by stormwater-related pollutants, and to the extent feasible, identify the
source(s) of the pollutant. The use of the report and list prepared by the
Department to comply with Federal Clean Water Act, Section 303(d) and 305(b)
(33 U.S.C.
§§
1313.(d) and 1315(b)) and
underlying data, including biological assessments, is encouraged; and
3. Identify and rank the most significant
existing and potential stormwater-related pollutants and, for each pollutant,
identify and rank the sources.
(e) Using the modeling or other information
obtained under (a) through (c) above for stormwater-related water quantity
impacts and stormwater-related groundwater recharge impacts of existing and
projected land uses assuming full development under existing zoning, the most
significant existing and potential stormwater-related water quantity problems,
including flooding, erosion, mosquitoes, base-flow reduction, groundwater
depletion, and associated ecosystem impacts, shall be identified and described.
The problems shall be ranked based on consideration of threat to public health,
safety, and welfare as evidenced by history of or potential for flood damage;
risk of loss of or damage to water supplies; and risk of damage to the
biological integrity of water bodies.
