[Added 6-11-2007 by Ord.
No. 7-2007]
A.
Purpose.
1.
a.
Land development projects and associated disturbances of vegetation
and soil and changes in land cover, including increases in impervious
cover, alter the hydrologic response of local watrersheds and increase
stormwater runoff rates and volumes. If inadequately or improperly
managed, this stormwater runoff can deplete groundwater resources
and increase flooding, stream channel erosion, and sediment transport
and deposition.
b.
This stormwater runoff contributes to increased quantities of waterborne
pollutants.
c.
Increases of stormwater runoff, soil erosion and nonpoint source
pollutants have occurred in the past as a result of land development,
and contribute to the degradation of the water resources of Corbin
City and downstream municipalities.
d.
Certain lands of Corbin City lie within the Pinelands Area, and therefore,
development in this portion of Corbin City is subject to the requirements
of the Pinelands Protection Act (N.J.S.A. 13:18A-1 et seq.) and the
implementing regulations and minimum standards contained in the Pinelands
Comprehensive Management Plan (N.J.A.C. 7:50-1.1 et seq.) (CMP). The
purpose and intent of these regulations and standards is to promote
orderly development of the Pinelands so as to preserve and protect
the significant and unique natural, ecological, agricultural, archaeological,
historical, scenic, cultural and recreational resources of the Pinelands.
e.
Pinelands Area resources are to be protected in accordance with Pinelands
Comprehensive Management Plan at N.J.A.C. 7:50 et seq., New Jersey's
Stormwater Management Rules at N.J.A.C. 7:8-1.1 et seq. and New Jersey's
surface water quality antidegradation policies contained in the New
Jersey Surface Water Quality Standards at N.J.A.C. 7L9B-1.1 et seq.
Permitted uses shall maintain the ecological character and quality
of the Pinelands, including good water quality and natural rates and
volumes of flow.
f.
Increased stormwater rates and volumes and the sediments and pollutants
associated with stormwater runoff from future development projects
within the Pinelands Area have the potential to adversely affect Corbin
City's streams and water resources and the streams and water
resources of down stream municipalities.
g.
Stormwater runoff, soil erosion and nonpoint source pollution can
be controlled and minimized through the regulation of stormwater runoff
from development sites.
h.
It is in the public interest to regulate the discharge of stormwater
runoff from "major development" projects, as defined in § VII
of this ordinance, conducted within the Pinelands Area, as provided
in this ordinance, in order to control and minimize increases in stormwater
runoff rates and volumes, to maintain groundwater recharge, and to
control and minimize soil erosion, stream channel erosion and nonpoint
source pollution associated with stormwater runoff.
2.
Therefore, it is the purpose of this ordinance to establish minimum
stormwater management requirements and controls for major development,
consistent with the statewide stormwater requirements at N.J.A.C.
7:8, the regulation and standards contained in the Pinelands CMP,
and the provisions of the adopted master plan and land use ordinances
of Corbin City.
B.
Goals and Techniques.
1.
Through this ordinance, Corbin City has established the following
goals for stormwater control:
a.
To relate flood damage, including damage to life and property.
b.
To minimize any increase in stormwater runoff from new development.
c.
To reduce soil erosion from any development or construction project.
d.
To assure the adequacy of existing and proposed culverts and bridges,
and other instream structures.
e.
To maintain groundwater recharge.
f.
To minimize any increase in nonpoint pollution.
g.
To maintain the integrity of stream channels for their biological
functions, as well as for drainage.
h.
To restore, protect, maintain and enhance the quality of the streams
and water resources of Corbin City and the ecological character and
quality of the Pinelands Area.
i.
To minimize pollutants in stormwater runoff from new and existing
development in order to restore, protect, enhance and maintain the
chemical, physical and biological integrity of the surface and groundwaters
of Corbin City, to project public health and to enhance the domestic,
municipal, recreational, industrial and other uses of water.
j.
To protect public safety through the proper design and operation
of stormwater management basins.
2.
In order to achieve the goals for stormwater control set forth in
this ordinance, Corbin City has identified the following management
techniques.
a.
Implementation of multiple stormwater management Best Management
Practices (BMPs) may be necessary to achieve the performance standards
for stormwater runoff quantity and rate, groundwater recharge, erosion
control, and stormwater runoff quality established through this ordinance.
b.
Compliance with the stormwater runoff quantity and rate, groundwater
recharge, erosion control, and stormwater runoff quality standards
established through N.J.A.C. 7:8-1.1 et seq., and this ordinance,
shall be accomplished to the maximum extent practicable through the
use of nonstructural BMPs, before relying on structural BMPs. Nonstructural
BMPs are also known as Low Impact Development (LID) techniques.
c.
Nonstructural BMPs shall include both environmentally sensitive site
design and source controls that prevent pollutants from being placed
on the site or from being exposed to stormwater.
d.
Source control plans shall be development based upon physical site
conditions and the origin, nature and the anticipated quantity or
amount of potential pollutants.
e.
Structural BMPs, where necessary shall be integrated with nonstructural
stormwater management strategies and proper maintenance plans.
f.
When using structural BMPs, multiple stormwater management measures,
smaller in size and distributed spatially throughout the land development
site, shall be used wherever possible to achieve the performance standards
for water quality, quantity and groundwater recharge established through
this ordinance before relying on a single, larger stormwater management
measure to achieve these performance standards.
C.
Applicability.
1.
_____
a.
All site plans and subdivisions for major developments occurring
within the Pinelands Area that require preliminary or final site plan
or subdivision review.
b.
All major development projects undertaken by Corbin City shall comply
with this ordinance. (This clause is intended to provide consistency
with DEP's stormwater management requirements. As per normal
practice, all development within the Pinelands Area which is undertaken
by a Pinelands Area Municipality shall comply with all of the requirements
of the CMP.
D.
Procedures. In addition to other development review procedures set
forth in the Code of Corbin City, major developments located within
the Pinelands Area shall comply with the stormwtaer management requirements
and specifications set forth in this ordinance. New agricultural development
that meets the definition of major development in § VII
of this ordinance shall be submitted to the appropriate Soil Conservation
District for review and approval in accordance with the requirements
of N.J.A.C. 5.4(b) 7:8.
E.
Compatibility with other permit and ordinance requirements.
1.
Development approvals issued for subdivisions and site plans pursuant
to this ordinance are to be considered an integral part of development
approvals under the subdivision and site plan review process and do
not relieve the applicant of the responsibility to secure required
permits or approvals for activities regulated by any other applicable
ordinance, code, rule, regulation, statute, act or other provision
of law.
2.
In their interpretation and application, the provisions of this ordinance
shall be held to be the minimum requirements for the promotion of
the public health, safety, and general welfare. This ordinance is
not intended to interfere with, abrogate, or annul any other ordinances,
rule or regulation, statute, or other provision of law except that,
where any provision of this ordinance imposes restrictions different
from those imposed by any other ordinance, rule or regulation, or
other provision of law, the more restrictive or stringent provisions
or higher standards shall control.
3.
In the event that a regional stormwater management plan(s) is prepared
and formally adopted pursuant to N.J.A.C. 7:8-1.1 et seq. for any
drainage area(s) or watershed(s) of which Corbin City is a part, the
stormwater provisions of such a plan(s) shall be adopted by Corbin
City within one year of the adoption of a Regional Stormwater Management
Plan (RSWMP) as an amendment to an Arearwide Water Quality Management
Plan. Local ordinances proposed to implement the RSWMP shall be submitted
to the Commission for certification within six months of the adoption
of the RSWMP per N.J.A.C. 7:8 and the Pinelands CMP (N.J.A.C. 7:50).
A.
Submission of site development stormwater plan.
1.
Whenever an applicant seeks municipal approval of a site development
that is subject to this ordinance, the applicant shall submit all
of the required components of the Checklist for the Site Development
Stormwater Plan at § II.C below as part of the applicant's
application for subdivision or site plan approval. These required
components are in addition to any other information required under
any provisions of Corbin City's land use ordinance or by the
Pinelands Commission pursuant to N.J.A.C. 7:50-1.1 et seq.
2.
The applicant shall demonstrate that the site development project
meets the standards set forth in this ordinance.
3.
The applicant shall submit three copies (Municipality may select
a different number if appropriate) of the materials listed in the
checklist for site development stormwater plans in accordance with
§ III.C of this ordinance.
B.
Site development stormwater plan approval.
1.
The applicant's site development stormwater plan shall be reviewed
as part of the subdivision or site plan review process by the municipal
board or official from whom municipal approval is sought. That municipal
board or official shall consult the engineer retained by the Planning
and/or Zoning Board (as appropriate) to determine if all of the checklist
requirements have been satisfied and to determine if the project meets
the standards set forth in this ordinance.
C.
Checklist requirements. Any application for approval of a major development
shall include at least the following information. All required engineering
plans shall be submitted to the Corbin City and the Pinelands Commission
in CAD Formal 15 or higher, registered and other documents shall be
submitted in both paper and commonly used electronic file formats
such as pdf., word processing, database or spreadsheet files. Three
copies (Municipality may select a different number if appropriate)
of each item shall be submitted.
1.
Topographic base map. The applicant shall submit a topographic base
map of the site which extends a minimum of 300 feet beyond the limits
of the proposed development, at a scale of one inch equals 200 feet
or greater, showing one-foot contour intervals. The map shall indicate
the following: existing surface water drainage, shorelines, steep
slopes, soils, highly erodible soils, perennial or intermittent streams
that drain into or upstream of any Category One or Pinelands Waters,
wetlands and floodplains along with their appropriate buffer strips,
marshlands and other wetlands, previous or vegetative surfaces, existing
surface and subsurface human-made structures, roads, bearing and distances
of property lines, and significant natural and man-made features not
otherwise shown. Corbin City or the Pinelands Commission may require
upstream tributary drainage system information as necessary.
2.
Environmental site analysis. The applicant shall submit a written
description along with the drawings of the natural and human-made
features of the site and its environs. This description should include:
a.
A discussion of environmentally critical areas, soil conditions,
slopes, wetlands, waterways and vegetation on the site. Particular
attention should be given to unique, unusual or environmentally sensitive
features and to those that provide particular opportunities for or
constraints on development.
b.
Detailed soil and other environmental conditions on the portion of
the site proposed for installation of any stormwater BMPs, including,
at a minimum: soils report based on on-site soil tests; locations
and spot elevations in plan view of test pits and permeability tests;
permeability test data and calculations; and any other required soil
data (e.g., mounding analyses results) correlated with location and
elevation of each test site; cross-section of proposed stormwater
BMP with side-by-side depiction of soil profile drawn to scale and
seasonal high water table elevation identified; and any other information
necessary to demonstrate the suitability of the specific proposed
structural and nonstructural stormwater management measures relative
to the environmental conditions on the portion(s) of the site proposed
for implementation of those measures.
3.
Project description and site plan(s). The applicant shall submit
a map (or maps) at the scale of the topographical base map indicating
the location of existing and proposed buildings, roads, parking areas,
utilities, structural facilities for stormwater management and sediment
control, and other permanent structures. The map(s) shall also clearly
show areas where alterations will occur in the natural terrain and
cover, including lawns and other landscaping, and seasonal high groundwater
elevations. A written description of the site plan and justification
for proposed changes in natural conditions shall also be provided.
4.
Land use planning and source control plan.
a.
The applicant shall submit a detailed Land Use Planning and Source
Control Plan which provides a description of how the site will be
developed to meet the erosion control, groundwater recharge and stormwater
runoff quantity and quality standards at § IV through use
of nonstructural or low impact development techniques and source controls
to the maximum extent practicable before relying on structural BMPs.
The Land Use Planning and Source Control Plan shall include a detailed
narrative and associated illustrative maps and/or plans that specifically
address how each of the following nine nonstructural strategies identified
in subchapter 5 of the NJDEP Stormwater Management Rules (N.J.A.C.
7:8-5) and set forth below (4.a.i. through ix.) Will be implemented
to the maximum extent practicable to meet the standards at § IV
of this ordinance on the site. If one or more of the nine nonstructural
strategies will not be implemented on the site, the applicant shall
provide a detailed rationale establishing a basis for the contention
that use of the strategy is not practicable on the site.
i.
Protect areas that provide water quality benefits or areas particularly
susceptible to erosion and sediment loss.
ii.
Minimize impervious surfaces and break up or disconnect the
flow of runoff over impervious surfaces.
iii.
Maximize the protection of natural drainage features and vegetation.
iv.
Minimize the decrease in the pre-development "time of concentration".
v.
Minimize land disturbance including clearing and grading.
vi.
Minimize soil compaction and all other soil disturbance.
vii.
Provide low-maintenance landscaping that provides for the region
and planting of native plants and minimizes the use of laws, fertilizers
and pesticides, in accordance with N.J.A.C. 7:50-6.24.
viii.
Provide vegetated open-channel conveyance systems discharging
into and through stable vegetated areas; and
ix.
Provide other source controls to prevent or minimize the use
or exposure of pollutants at the site in order to prevent or minimize
the release of those pollutants into stormwater runoff. These source
controls shall include, but are not limited to:
1.
Site design features that help to prevent accumulation of trash
and debris in drainage systems.
2.
Site design features that help to prevent discharge of trash
and debris from drainage systems.
3.
Site design features that help to prevent and/or contain spills
or other harmful accumulations of pollutants at industrial or commercial
developments.
4.
Applying fertilizer in accordance with the requirements established
under the Soil Erosion and Sediment Control Act, N.J.S.A. 4:24-39
et seq., and implementing rules, when establishing vegetation after
land disturbance.
b.
For sites where stormwater will be generated from "high pollutant
loading areas" or where stormwater will be exposed to "source material",
as defined in § VII of this ordinance, the applicant shall
also demonstrate in the Land Use Planning and Source Control Plan
that the requirements of § IV have been met.
c.
The use of nonstructural strategies to meet the performance standards
in § IV of this ordinance is not required for development
sites creating less than one acre of disturbance. However, each application
for major development and any other application where Corbin City
otherwise requires a landscaping plan shall contain a landscaping
or revegetation plan in accordance with the CMP standards at N.J.A.C.
7:50-6.24(c). In addition, the applicant shall demonstrate that, at
a minimum, existing tees and vegetation on the development site will
be preserved and protected according to the minimum standards established
by provisions of the Corbin City Land Use Ordinance, Zoning Ordinance
or by conditions of zoning or variance approval.
5.
Stormwater Management Facilities
Map. The applicant shall submit a map, at the same scale as the topographic
base map, depicting the following information:
i.
The total area to be disturbed, paved and/or built upon, proposed
surface contours, land area to be occupied by the storm water management
activities and the type of vegetation thereon, and details of the
purpose plan to manage and dispose of stormwater.
ii.
Details of all stormwater management facility designs, during
and after construction, including discharge provisions, discharge
capacity for each outlet at different levels of detention (if applicable)
and emergency spillway provisions with maximum discharge capacity
of each spillway.
6.
Calculations (groundwater recharge and stormwater runoff rate, volume
and quality). The applicant shall submit comprehensive hydrologic
and hydraulic design calculations for the pre-development and post-development
conditions for the design storms specified in § III. The
standards for groundwater recharge and stormwater runoff rate, volume
and quality required by § IV shall be met using the methods,
calculations and assumptions provided in § III.
7.
Inspection, maintenance and repair plan. The applicant shall submit
a detailed plan describing how the proposed stormwater management
measure(s) shall meet the maintenance and repair requirements of § VI
of this ordinance. Said plan shall include, at a minimum, the following
elements:
a.
The frequency with which inspections will be made.
b.
The specific maintenance tasks and requirements for each proposed
structural and nonstructural BMP.
c.
The name, address and telephone number for the entity responsible
for implementation of the maintenance plan.
d.
The reporting requirements.
e.
Copies of the inspection and maintenance reporting sheets.
8.
Exception from submission requirements. An exception may be granted
from submission of any of these required components (except 7. above,
Inspection, Maintenance, and Repair Plan) if its absence will not
materially affect the review process. However, items required pursuant
to the application requirements in the Pinelands CMP (N.J.A.C. 7:50-4.2(b)
(in the final ordinance adopted by Corbin City, this CMP citation
should be replaced with the specific citation of the Corbin City ordinance
that is correlated to this CMP requirement) shall be submitted to
the NJ Pinelands Commission unless the Executive Director waives or
modifies the application requirements.
A.
Method of calculating stormwater runoff rate and volume.
1.
In complying with the Stormwater Runoff Quantity and Rate Standards
in § IV.B, the design engineer shall calculate the stormwater
runoff rate and volume using the USDA Natural Resources Conservation
Service (NRCS) Runoff Equation, Runoff Curve Numbers, and Dimensionless
Unit Hydrograph, as described in the NRCS National Engineering Handbook
Part 630 - Hydrology and Technical Release 55 - Urban Hydrology for
Small Watersheds, incorporated herein by reference, as amended and
supplemented. Alternative methods of calculation may be utilized,
provided such alternative methods are at least as protective as the
NRCS methodology when considered on a regional stormwater management
basis.
2.
In calculating stormwater runoff using the NRCS methodology, the
design engineer shall separately calculate and then combine the runoff
volumes from pervious and directly connected impervious surfaces within
each drainage area within the parcel.
3.
Calculation of stormwater runoff from unconnected impervious surfaces
shall be based, as applicable, upon the Two-Step method described
in the current New Jersey Stormwater Best Management Practices Manual
or the NRCS methodology.
4.
In calculating stormwater runoff using the NRCE methodology, the
design engineer shall use and Atmospheric Administration, available
online at http://hdsc.nws.noaa.gov/hdsc/pfds/index.html
5.
When calculating stormwater runoff for pre-developed site conditions,
the design engineer shall use the following criteria:
a.
When selecting or calculating Runoff Curve Numbers (Cns) for pre-developed
project site conditions, the project site's land cover shall
be assumed to be woods in good condition. However, another land cover
may be used to calculate runoff coefficients if:
i.
Such land cover has existed at the site or portion thereof without
interruption for at least five years immediately prior to the time
of application.
ii.
The design engineer can document the character and extent of
such land cover through the use of photographs, affidavits, and/or
other acceptable land use records.
b.
If more than one land cover has existed on the site during the five
years immediately prior to the time of application, the land cover
with the lowest runoff potential shall be used for the computations.
c.
All pre-developed land covers shall be assumed to be in good hydrologic
condition and, if cultivated, shall be assumed to have conservation
treatment.
d.
In calculating pre-developed site stormwater runoff, the design engineer
shall include the effects of all land features and structures, such
as ponds, wetlands, depressions, hedgerows, and culverts, that affect
pre-developed site stormwater runoff rates and/or volumes.
e.
Where tailwater will affect the hydraulic performance of a stormwater
management measure, the design engineer shall include such effects
in the measure's design.
B.
Method of calculating stormwater runoff quality.
1.
In complying with the Stormwater Runoff Quality Standards in § IV.F.1,
the design engineer shall calculate the stormwater runoff rate and
volume using the USDA Natural Resources Conservation Service (NRCS)
Runoff Equation, Runoff Curve Numbers, and Dimensionless Unit Hydrograph,
as described in the NRCS National Engineering Handbook Part 630 -
Hydrology and Technical Release 55 - Urban Hydrology for Small Watersheds,
as amended and supplemented.
2.
The design engineer shall also use the NJDEP Water Quality Design
Storm, which is 1.25 inches of rainfall falling in a nonlinear pattern
in two hours. Details of the Water Quality Design Storm are shown
in Table 1.
3.
Calculation of runoff volumes, peak rates, and hydrographs for the
Water Quality Design Storm may take into account the implementation
of nonstructural and structural stormwater management measures.
Table 1: Water Quality Design Storm Distribution
(Source N.J.A.C. 7:8-5.5(a))
| |||
---|---|---|---|
Time
(minutes)
|
Cumulative Rainfall
(inches)
|
Time
(minutes)
|
Cumulative Rainfall
(inches)
|
0
|
0.0000
|
65
|
0.8917
|
5
|
0.0083
|
70
|
0.9917
|
10
|
0.0166
|
75
|
1.0500
|
15
|
0.0250
|
80
|
1.0840
|
20
|
0.0500
|
85
|
1.1170
|
25
|
0.0750
|
90
|
1.1500
|
30
|
0.1000
|
95
|
1.1750
|
35
|
0.1330
|
100
|
1.2000
|
40
|
0.1660
|
105
|
1.2250
|
45
|
0.2000
|
110
|
1.2334
|
50
|
0.2583
|
115
|
1.2417
|
55
|
0.3583
|
120
|
1.2500
|
60
|
0.6250
|
4.
Total Suspended Solids (TSS) reduction
calculations.
i.
If more than one stormwater BMP in series is necessary to achieve
the required 80% TSS reduction for a site, the applicant shall utilize
the following formula to calculate TSS reduction:
R = A + B (A x B)/100
|
Where:
| |||
R
|
=
|
Total TSS percent load removal from application of both BMP's.
| |
A
|
=
|
The TSS percent removal rate applicable to the first BMP.
| |
B
|
=
|
The TSS percent removal rate applicable to the second BMP.
|
ii.
If there is more than one on-site drainage area, the 80% TSS
removal rate shall apply to each drainage area, unless the runoff
from the subareas converge on site, in which case the removal rate
can be demonstrated through a calculation using a weighted average.
5.
TSS removal rates for stormwater BMPs.
a.
For purposes of TSS reduction calculations, Table 2 presents the
presumed removal rates for certain BMPs designed in accordance with
the New Jersey BMP Manual. The BMP Manual may be obtained from the
address identified in § XII.A or found on the NJDEP's
website at www.njstormwater.org TSS reduction shall be calculated
based on the removal rates for the BMPs in Table 2.
b.
Alternative stormwater management measures, removal rates and methods
of calculating removal rates may be used if the design engineer provides
documentation demonstrating the capability of these alternative rates
and methods to Corbin City. Any alternative stormwater management
measure, removal rate or method of calculating the removal rate shall
be subject to approval by Corbin City and a copy shall be provided
to the following:
i.
The Division of Watershed Management, New Jersey Department
of Environmental Protection, PO Box 418, Trenton, NJ, 08625-0418.
ii.
The New Jersey Pinelands Commission, PO Box 7, New Lisbon, NJ,
08064.
Table 2: Pollutant Removal Rates for BMPs (Source 7:8-5.5(c)
and New Jersey BMP Manual Chapter 4
| |||
---|---|---|---|
Best Management Practice
|
TSS Percent Removal Rate
|
Total Phosphorus Percent Removal Rate
|
Total Nitrogen Percent Removal Rate
|
Bioretention
| |||
Systems
|
90
|
60
|
30
|
Constructed Stormwater Wetland
|
90
|
50
|
30
|
Extended Detention Basin
|
40-60 (final rate based upon detention time; see New Jersey
BMP Manual, Chap.9)
|
20
|
20
|
Infiltration basin
|
80
|
60
|
50
|
Manufactured Treatment Device
|
Pollutant removal rates as certified by NJDEP; see § III
|
Pollutant removal rates as certified by NJDEP, see § III
|
Pollutant removal rates as certified by NJDEP; see § III
|
Pervious Paving Systems
|
80 (porous paving)
80 (permeable pavers with storage bed)
0 - volume reduction only (permeable pavers without storage
bed)
|
60
60
0 - volume
reduction only (permeable pavers without storage bed)
|
50
50
0 - volume reduction only (permeable pavers without storage
bed)
|
Sand Filter
|
80
| ||
Vegetative Filter Strip (For filter strips with multiple vegetated
covers, the final TSS removal rate should be based upon a weighted
average of the adopted rates shown in Table 2, based upon the relative
flow lengths through each cover type).
|
60 (turf grass)
70(native grasses, meadow and planted woods)
80 (indigenous woods)
|
30
|
30
|
Wet Pond/Retention
|
50-90 (final rate upon pool volume and detention time; see NJ
BMP Manual)
|
50
|
30
|
6.
Nutrient removal rates for stormwater BMPs. For purposes of post-development
nutrient load reduction calculations, Table 2 presents the presumed
removal rates for certain BMPs designed in accordance with the New
Jersey BMP Manual. If alternative stormwater BMPs are proposed, the
applicant shall demonstrate that the selected BMPs will achieve the
nutrient removal standard required in § IV.F.
C.
Method of Calculating Groundwater Recharge.
1.
In complying with the groundwater recharge requirements in § IV.C.1.a.,
the design engineer may calculate groundwater recharge in accordance
with the New Jersey Groundwater Recharge Spreadsheet (NJGRS) computer
program incorporated herein by reference as amended and supplemented.
Information regarding the methodology is available in § XI.A
or from the New Jersey BMP Manual.
2.
Alternative groundwater recharge calculation methods to meet these
requirements may be used upon approval by the municipal engineer.
3.
In complying with the groundwater recharge requirements in § IV.C.1.b.,
the design engineer shall:
a.
Calculate stormwater runoff volumes in accordance with the USDA Natural
Resources Conservation Service (NRCS) methodology, including the NRCS
Runoff Equation and Runoff Curve Numbers, as described in the NRCS
National Engineering Handbook Part 630 - Hydrology and Technical Release
55 - Urban Hydrology for Small Watersheds as amended and supplemented.
b.
Use appropriate two-year, twenty-four-hour rainfall depths as developed
for the project site by the National Oceanic and Atmospheric Administration,
available online at http://hdsc.nws.noaa.gov/hds/pfds/index.html
4.
When calculating groundwater recharge or stormwater runoff for redeveloped
site conditions, the design engineer shall use the following criteria:
a.
When selecting land covers or calculating Runoff Curve Numbers (Cns)
for redeveloped project site conditions, the project site's land
cover shall be assumed to be woods. However, another land cover may
be used to calculate runoff coefficients if:
i.
Such land cover has existed at the site or portion thereof without
interruption for at least five years immediately prior to the time
of application; and
ii.
The design engineer can document the character and extent of
such land cover through the use of photographs, affidavits, and/or
other acceptable land use records.
b.
If more than one land cover, other than woods, has existed on the
site during the five years immediately prior to the time of application,
the land cover with the lowest runoff potential (including woods)
shall be used for the computations.
c.
All redeveloped land covers shall be assumed to be in good hydrologic
condition and, if cultivated, shall be assumed to have conservation
treatment.
A.
Nonstructural Stormwater Management Strategies.
1.
To the maximum extent practicable, the performance standards in § IV
for major development shall be met by incorporating the nine nonstructural
strategies identified in Subchapter 5 of the NJ Stormwater Management
Rules (N.J.A.C. 7:8-5), and set forth in § II.C.4.a, into
the design. The applicant shall identify within the Land Use Planning
and Source Control Plan required by § II.C.4 of this ordinance
how each of the nine nonstructural measures will be incorporated into
the design of the project to the maximum extent practicable.
2.
If the applicant contends that it is not practical for engineering,
environmental or safety reasons to incorporate any of the nine nonstructural
strategies into the design of a particular project, the applicant
shall provide a detailed rationale establishing a basis for the contention
that use of the strategy is not practical on the site. This rationale
shall be submitted in accordance with the Checklist Requirements established
by § II to Corbin City. A determination by Corbin City that
this rationale is inadequate or without merit shall result in a denial
of the application unless one of the following conditions are met:
a.
The Land Use Planning and Source Control Plan is amended to include
a description of how all nine nonstructural measures will be implemented
on the development site, and the amended Plan is approved by Corbin
City.
b.
The Land Use Planning and Source Control Plan is amended to provide
an alternative nonstructural strategy or measure that is not included
in the list of nine nonstructural measures, but still meets the performance
standards in § IV, and the amended Plan is approved by Corbin
City.
c.
The Land Use Planning Source Control Plan is amended to provide an
adequate rationale for the contention that use of the particular strategy
is not practical on the site, and the amended Plan is approved by
Corbin City.
3.
In addition to all other requirements of this section, each applicant
shall demonstrate that, at a minimum, existing trees and vegetation
on the development site will be preserved, protected and maintained
according to the minimum standards established by provisions of the
Corbin City Land Use Ordinance, Zoning Ordinance or by conditions
of zoning or variance approval. Existing trees and vegetation shall
be protected during construction activities in accordance with the
"Standard for Tree Protection During Construction" provided in the
NJ State Soil Conservation Committee Standards for Soil Erosion and
Sediment Control in New Jersey, which is incorporated herein by reference
as amended and supplemented.
4.
In addition to all other requirements of this section, each application
for major development, and any other application where Corbin City
otherwise requires a landscaping plan, shall contain a landscaping
or revegetation plan in accordance with the Pinelands CMP standards
at N.J.A.C. 7:50-6.24(c).
5.
Any land area used as a nonstructural stormwater management measure
to meet the performance standards in § IV shall be dedicated
to a government entity; shall be subjected to a conservation easement
filed with the appropriate County Clerk's office; or shall be
subjected to an equivalent form of restriction approved by Corbin
City that ensures that that measure, or equivalent stormwater management
measure is maintained in perpetuity, as detailed in § VI
of this ordinance.
6.
Guidance for nonstructural stormwater management strategies is available
in the New Jersey BMP Manual, which may be obtained from the address
identified in § XII.A or found on the NJDEP's website
at www.njstormwater.org
7.
Exception for major development sites creating less than one acre
of disturbance. The use of nonstructural strategies to meet the performance
standards in § IV of the ordinance is not required for major
development creating less than one acre of disturbance. However, the
following requirements shall be met:
a.
Each application for major development and any other application
where Corbin City otherwise request a landscaping plan shall contain
a landscaping or revegetation plan prepared in accordance with the
Pinelands CMP standards (N.J.A.C. 7:50-6.24(c).
b.
Each applicant shall demonstrate that, at a minimum, existing trees
and vegetation on the development site will be preserved and protected
according to the minimum standards established by provisions of the
Corbin City Land Use Ordinance, Zoning Ordinance or by conditions
of zoning or variance approval.
c.
Existing trees and vegetation shall be protected during construction
activities in accordance with the "Standard for Tree Protection During
Construction" provided in the NJ State Soil Conservation Committee
Standards for Soil Erosion and Sediment Control in New Jersey, which
is incorporated herein by reference as amended and supplemented.
B.
Stormwater runoff quantity and rate standards.
1.
There shall be no direct discharge of stormwater runoff from any
point or nonpoint source to any wetland, wetlands transition area
or surface water body. In addition, stormwater runoff shall not be
directed in such a way as to increase the volume and/or rate of discharge
into any surface water body from that which existed prior to development
of the site.
2.
To the maximum extent practical, there shall be no direct discharge
of stormwater runoff onto farm fields so as to protect farm crops
from damage due to flooding, erosion and long-term saturation of cultivated
crops and cropland.
3.
For all major developments, the total runoff volume generated from
the net increase in impervious surfaces by a ten year, twenty-four
hour storm shall be retained and infiltrated on site.
4.
In addition, the design engineer, using the assumptions and factors
for stormwater runoff and groundwater recharge calculations contained
in § III, shall either:
a.
Demonstrate through hydrologic and hydraulic analysis that the post-developed
stormwater runoff hydrographs from the project site for the two-,
ten-, and one-hundred-year storms do not exceed, at any point in time,
the site's pre-developed runoff hydrographs for the same storms.
b.
Demonstrate through hydrologic and hydraulic analysis that under
post-developed site conditions:
i.
There is no increase in pre-developed stormwater runoff rates
from the project site for the two-, ten-, and one hundred-year storms.
ii.
Any increased stormwater runoff volume or change in stormwater
runoff timing for the two-, ten-, and one hundred-year storms will
not increase flood damage at or downstream of the project site. When
performing this analysis for pre-developed site conditions, all off-site
development levels shall reflect existing conditions. When performing
this analysis for post-developed site conditions, all off-site development
levels shall reflect full development in accordance with current zoning
and land use ordinance.
c.
Demonstrate that the peak post-developed stormwater runoff rates
from the project site for the two-, ten- and one-hundred-year storms
are 50%, 75% and 80%, respectively, of the site's peak pre-developed
stormwater runoff rates for the same storms. Peak outflow rates from
on-site stormwater measures for these storms shall be adjusted where
necessary to account for the discharge of increased stormwater runoff
rates and/or volumes from project site areas not controlled by the
on-site measures. These percentages do not have to be applied to those
portions of the project site that are not proposed for development
at the time of application, provided that such areas are:
5.
In tidal flood hazard areas, a stormwater runoff quantity analysis
in accordance with a, b, and c above shall only be applied if the
increased volume of stormwater runoff could increase flood damages
below the point of discharge.
6.
The standards for stormwater runoff quantity and rate required by
this section shall be met using the methods, calculations and assumptions
provided in Section § .
C.
Groundwater Recharge Standards.
1.
For all major developments, with the exception of those described
in § IV.C.4, below, the design engineer, using the assumptions
and factors for stormwater runoff and groundwater recharge calculations
contained in § III, shall either:
a.
Demonstrate through hydrologic and hydraulic analysis that the post-developed
project site maintains 100% of the site's predeveloped average
annual groundwater recharge volume.
b.
Demonstrate through hydrologic and hydraulic analysis that any increase
in the project site's stormwater runoff for the two year, twenty-four
hour storm from predeveloped to post-developed conditions is infiltrated
on-site.
2.
The design engineer shall assess the hydraulic impact on the groundwater
table and design the project site and all site groundwater recharge
measures so as to avoid adverse hydraulic impacts. Adverse hydraulic
impacts include, but are not limited to: raising the groundwater table
so as to cause surface ponding; flooding of basements and other subsurface
structures and areas; preventing a stormwater infiltration basin from
completely draining via infiltration within 72 hours of a design storm
event; and interference with the proper operation of subsurface sewage
disposal systems and other surface and subsurface facilities in the
vicinity of the groundwater recharge measure.
3.
The standards for groundwater recharge required by this section shall
be met using the methods, calculations and assumptions provided in
§ III.
D.
Erosion Control Standards. The minimum design and performance standards
for erosion control are those established under the Soil Erosion and
Sediment Control Act, N.J.S.A. 4:24-39 et seq., and its implementing
regulations, N.J.A.C. 2:90-1.1 through 1.4.
E.
Stormwater Runoff Quality Standards.
1.
There shall be no direct discharge of stormwater runoff from any
point or nonpoint source to any wetland, wetland transition area or
surface water body.
2.
Stormwater management measures shall be designed to reduce the total
suspended solids (TSS) load in the stormwater runoff from the post-developed
site by 80% expressed as an annual average.
3.
Stormwater management measures shall also be designed to reduce the
nutrient load in the stormwater runoff from the post-developed site
by the maximum extent practicable. In achieving this reduction, the
design of the development site shall include nonstructural and structural
stormwater management measures that optimize nutrient removal while
still achieving the groundwater recharge, runoff quantity and rate,
and TSS removal standards in this section.
4.
The standards for stormwater runoff quality required by this section
shall be met using the methods, calculations, assumptions and pollutant
removal rates provided in § III.
5.
Exceptions.
b.
The TSS reduction requirement in § IV.F.2 shall not apply
to any stormwater runoff in a discharge regulated under a numeric
effluent limitation for TS imposed under the NJPDES rules (N.J.A.C.
7:14A) or in a discharge specifically exempt under a NJPDES permit
from this requirement.
c.
The stormwater runoff quantity and rate standards in § IV.B
shall still be met for all major development sites.
F.
Additional stormwater quality standards for high pollutant loading
area and areas where stormwater runoff is exposed to source material.
2.
For a major development in areas described in 1.a or 1.b above, in
addition to the infiltration requirements specified in § IV.B.2
and the groundwater recharge requirements specified in § IV.C,
the applicant shall demonstrate in the Land Use Planning and Source
Control Plan required in § II.C.4 that the following requirements
have been met:
a.
The extent of the areas described in 1.a and 1.b above have been
minimized on the development site to the maximum extent practicable.
b.
The stormwater runoff from the areas described in 1.a and 1.b above
is segregated to the maximum extent practicable from the stormwater
runoff generated from the remainder of the site such that co-mingling
of the stormwater runoff from the areas described in 1.a and 1.b above
and the remainder of the site will be minimized.
c.
The amount of precipitation falling directly on the areas described
in 1.a and 1.b above is minimized to the maximum extent practicable
by means of a canopy, roof or other similar structure that reduces
the generation of stormwater runoff.
d.
The stormwater runoff from or co-mingles with the areas described
in 1.a and 1.b above for the Water Quality Design Storm, defined in
§ III.B. Table 1 shall be subject to pretreatment by one
or more of the following stormwater BMPs, designed in accordance with
the New Jersey BMP Manual to provide 90% TSS removal.
i.
Bioretention system.
ii.
Sand filter.
iii.
Wet ponds which shall be hydraulically disconnected by a minimum
of two feet of vertical separation from the seasonal high water table
and shall be designed to achieve a minimum 80% TSS removal rate.
iv.
Constructed stormwater wetlands; and or
v.
Media filtration system manufactured treatment device with a
minimum 80% TSS removal as verified by the New Jersey Corporation
for Advanced Technology and as certified by NJDEP.
e.
If the potential for contamination of stormwater runoff by petroleum
products exists on site, prior to being conveyed to the pretreatment
BMP required in § IV.D.2.d above, the stormwater runoff
from the areas described in 1.a and 1.b above shall be conveyed through
an oil/grease separator or other equivalent manufactured filtering
device to remove the petroleum hydrocarbons. The applicant shall provide
the reviewing agency with sufficient data to demonstrate acceptable
performance of the device.
G.
Threatened and Endangered Species and Associated Habitat Standards.
Stormwater management measures shall address the impacts of the development
on habitat for threatened and endangered species, in accordance with
N.J.A.C. 7:50-6.27, and 7:50-6.33 and 34.
H.
Exceptions and Mitigation Requirements.
1.
Exceptions from strict compliance from the groundwater recharge,
stormwater runoff quantity, and stormwater runoff quality requirements
established by this ordinance may be granted, at the discretion of
the Corbin City, and subject to approval by the Pinelands Commission,
provided that all of the following conditions are met:
a.
The exception is consistent with that allowed by Corbin City.
b.
Corbin City has an adopted and effective municipal stormwater management
plan in accordance with N.J.A.C. 7:8-4.4, which includes a mitigation
plan in accordance with N.J.A.C. 7:8-4.2(c) 11, and is also certified
by the Pinelands Commission. The mitigation plan shall identify what
measures are necessary to offset the deficit created by granting the
exception and the municipality shall submit a written report to the
county review agency and the NJDEP describing the exception and the
required mitigation. Guidance for developing municipal stormwater
management plans, including mitigation plans, is available from the
NJDEP, Division of Watershed Management and the New Jersey BMP Manual.
c.
The applicant demonstrates that mitigation, in addition to the requirements
of mitigation plan discussed in b. above, will be provided consistent
with one of the following options:
i.
Mitigation may be provided off-site, but within the Pinelands
Area and within the same drainage area as the development site, and
shall meet or exceed the equivalent recharge, quality or quantity
performance standard which is lacking on the development site due
to the exception.
ii.
In lieu of the required mitigation,
a monetary "in lieu contribution" may be provided by the applicant
to Corbin City in accordance with the following:
a.
The amount of the in lieu contribution shall be determined by
Corbin City, but the maximum in lieu contribution required shall be
equivalent to the cost of implementing and maintaining the stormwater
management measure(s) for which the exception is granted.
b.
The in lieu contribution shall be used to fund an off-site stormwater
control mitigation project(s) located within the Pinelands Area, within
the same drainage area as the development site, and shall meet or
exceed the equivalent recharge, quality or quantity performance standards
which is lacking on the development site. Such mitigation project
shall be identified by Corbin City in Corbin City's adopted municipal
stormwater management plan. The stormwater control project to which
the monetary contribution will be applied shall be identified by Corbin
City at the time the exception is granted. The applicant shall amend
the project description and site plan required in § II.C.3
to incorporate a description of both the standards for which an on-site
exception is being granted and of the selected off-site mitigation
project.
c.
Corbin City shall expend the in lieu contribution to implement
the selected off-site mitigation project within five years from the
date that payment is received. Should Corbin City fail to expend the
in lieu contribution within the required time frame, the mitigation
option provided in § IV.H.1.c.iii of this ordinance shall
be void and Corbin City shall be prohibited from collecting in lieu
contributions.
2.
An exception from strict compliance granted in accordance with H.1.
above shall not constitute a waiver of strict compliance from the
requirements of the Pinelands Comprehensive Management Plan at N.J.A.C.
7:50. An applicant should contact the Pinelands Commission to determine
whether a waiver of strict compliance is also required in accordance
with N.J.A.C. 7:50, Subchapter 4, Part V.
A.
General Design and Construction Standards.
1.
Structural stormwater management measures shall be designed to meet
the standards established in this section. These standards have been
developed to protect public safety, conserve natural features, create
an aesthetically pleasing site and promote proper on-site stormwater
management. (Though not required by N.J.A.C. 7:8, pursuant to their
authority, municipalities may have the option to require existing
basins that pose a public health or safety hazard to be retrofitted
to comply with the standards in this subsection.
2.
The following structural stormwater management measures may be utilized
as part of a stormwater management system at a major land development
in the Pinelands, provided that the applicant demonstrates that they
are designed, constructed and maintained so as to meet the standards
and requirements established by this ordinance. If alternative stormwater
management measures are proposed, the applicant shall demonstrate
that the selected measures will achieve the standards established
by this ordinance.
a.
Bioretention systems.
b.
Constructed stormwater wetlands.
c.
Extended detention basins.
d.
Infiltration basins.
e.
Vegetated filter strips.
f.
Infiltration basins and trenches.
g.
Wet ponds with suitable liners.
h.
Previous paving systems.
i.
Manufactured treatment devices, provided their pollutant removal
rates are verified by the New Jersey Corporation for Advanced Technology
and certified by the NJDEP.
3.
Structural stormwater management measures shall be designed to take
into account the existing site conditions, including environmentally
critical areas, wetlands, flood-prone areas, slopes, depth to seasonal
high water table, soil type, permeability and texture, and drainage
area and drainage patterns.
4.
Structural stormwater management measures shall be designed and constructed
to be strong, durable, and corrosion resistant (measures that are
consistent with the relevant portions of the Residential Site Improvement
Standards at N.J.A.C. 5:21-7.3, 7.4, and 7.8 shall be deemed to meet
this requirement); to minimize and facilitate maintenance and repairs;
and to ensure proper functioning.
5.
For all stormwater management measures at a development site, each
applicant shall submit a detailed Inspection, Maintenance and Repair
Plan consistent with the requirements of § V of this ordinance.
6.
To the maximum extent practicable, the design engineer shall design
structural stormwater management measures on the development site
in a manner that:
a.
Limits site disturbance, maximizes stormwater management efficiencies,
and maintains or improves aesthetic conditions.
b.
Utilizes multiple stormwater management measures, smaller in size
and distributed spatially throughout the land development site, instead
of a single larger structural stormwater management measure.
c.
Incorporates pretreatment measures. Pretreatment can extend the functional
life and increase the pollutant removal capability of a structural
stormwater management measure. Pretreatment measures may be designed
in accordance with the New Jersey BMP Manual or other sources approved
by the municipal engineer.
7.
Stormwater management basins shall be designed in a manner that complements
and mimics the existing natural landscape, including but not limited
to the following design strategies:
a.
Use of natural, non-wetland wooded depressions for stormwater runoff
storage.
b.
Establishment of attractive landscaping in and around the basin that
mimics the existing vegetation and incorporates native Pinelands plants,
including, but not limited to, the species listed in N.J.A.C. 7:50-6.25
and 6.26.
8.
Stormwater management basins shall be designed with gently sloping
sides. The maximum allowable basin side slope shall be three horizontal
to one vertical (3:1).
9.
Guidance on the design and construction of structural stormwater
management measures may be found in the New Jersey BMP Manual. Other
guidance sources may also be used upon approval by the municipal engineer.
10.
After all construction activities and required field testing have
been completed on the development site, as-built plans depicting design
and as-built elevations of all stormwater management measures shall
be prepared by a Licensed Land Surveyor and submitted to the municipal
engineer. Based upon the municipal engineer's review of the as-built
plans, all corrections or remedial actions deemed by the municipal
engineer to be necessary due to the failure to comply with the standards
established by this ordinance and/or any reasons of public health
or safety shall be completed by the applicant. In lieu of review by
the municipal engineer, Corbin City reserves the right to engage a
Professional Engineer to review the as-built plans. The applicant
shall pay all costs associated with such review.
B.
Design and Construction Standards for Stormwater Infiltration BMP's.
1.
Stormwater infiltration BMPs, such as bioretention systems with infiltration,
dry wells, infiltration basins, previous paving systems with storage
beds, and sand filters with infiltration, shall be designed, constructed
and maintained to completely drain the total runoff volume generated
by the basin's maximum design storm within 72 hours after a storm
event. Runoff storage for greater times can render the BMP ineffective
and may result in anaerobic conditions, odor and both water quality
and mosquito breeding problems.
2.
Stormwater infiltration BMPs shall be designed, constructed and maintained
to provide a minimum separation of at least two feet between the elevation
of the lowest point of the bottom of the infiltration BMP and the
seasonal high water table.
3.
A stormwater infiltration BMP shall be sited in suitable soils verified
by field testing to have permeability rates between one and 20 inches
per hour. If such site soils do not exist or if the design engineer
demonstrates that it is not practical for engineering, environmental
or safety reasons to site the storm water infiltration BMP(s) in such
soils, then the stormwater infiltration BMP(s) may be sited in soils
verified by field testing to have permeability rates in excess of
20 inches per hour, provided that a bioretention system, designed,
installed and maintained in accordance with the New Jersey BMP Manual,
is installed to meet one of the following conditions:
a.
The bioretention system is constructed as a separate measure designed
to provide pretreatment of stormwater and to convey the pretreated
stormwater into the infiltration BMP.
b.
The bioretention system is integrated into and made part of the infiltration
BMP and, as such, does not require an underdrain system. If this option
is selected, the infiltration BMP shall be designed and constructed
so that the maximum water depth in the bioretention system portion
of the BMP during treatment of the stormwater quality design storm
is 12 inches in accordance with the New Jersey BMP Manual.
4.
The minimum design permeability rate for the soil within a BMP that
relies on infiltration shall be 0.5 inch per hour. A factor of safety
of two shall be applied to the soil's field-tested permeability
rate to determine the soil's design permeability rate. For example,
if the field-tested permeability rate of the soil is four inches per
hour, its design permeability rate would be two inches per hour).
The minimum design permeability rate for the soil within a stormwater
infiltration basin shall also be sufficient to achieve the minimum
seventy-two hour drain described in 1. above. The maximum design permeability
shall be 10 inches per hour.
5.
A soil's field tested permeability rate shall be determined
in accordance with the following:
a.
The pre-development field test permeability rate shall be determined
according to the methodologies provided in § XI.C.3 of this
ordinance.
b.
The results of the required field permeability tests shall demonstrate
a minimum tested infiltration rate of one inch per hour.
c.
After all construction activities have been completed on the site
and the finished grade has been established in the infiltration BMP,
post-development field permeability tests shall also be conducted
according to the methodologies provided in § XI.C.3 of this
ordinance.
d.
If the results of the post-development field permeability tests fail
to achieve the minimum required designed permeability rates in five
above utilizing a factor of safety of two, the stormwater infiltration
BMP shall be renovated and re-tested until such minimum required design
permeability rates are achieved.
e.
The results of all field permeability tests shall be certified by
a Professional Engineer and transmitted to the municipal engineer.
6.
To help ensure maintenance of the design permeability rate over time,
a six inch layer of K5 soil shall be placed on the bottom of a stormwater
infiltration BMP. This soil layer shall meet the textural and permeability
specifications of a K5 soil as provided at N.J.A.C. 7:9A, Appendix
A, Figure 6, and be certified to meet these specifications by a Professional
Engineer licensed in the State of New Jersey. The depth to the seasonal
high water table shall be measured from the bottom of the K5 sand
layer.
7.
The design engineer shall assess the hydraulic impact on the groundwater
table and design the project site and all stormwater infiltration
basins so as to avoid adverse hydraulic impacts. Adverse hydraulic
impacts include, but are not limited to: raising the groundwater table
so as to cause surface ponding; flooding of basements and other subsurface
structures and areas; preventing a stormwater infiltration basin from
completely draining via infiltration within 72 hours of a design storm
event; and interference with the proper operation of subsurface sewage
disposal systems and other surface and subsurface structures in the
vicinity of the stormwater infiltration basin.
8.
The design engineer shall conduct a mounding analysis, as defined
in § VII, of all stormwater infiltration BMPs. The mounding
analysis shall be conducted in accordance with the requirements in
§ XI.C.3.1. Where the mounding analysis identifies adverse
impacts, the stormwater infiltration BMP shall be redesigned or relocated,
as appropriate.
9.
Stormwater infiltration BMPs shall be constructed in accordance with
the following:
a.
To avoid sedimentation that may result in clogging and reduce the
basin's permeability rate, stormwater infiltration basins shall
be constructed according to the following:
i.
Unless the conditions in (ii) below are met, a stormwater infiltration
basin shall not be placed into operation until its drainage area is
completely stabilized. Instead, upstream runoff shall be diverted
around the basin and into separate, temporary stormwater management
facilities and sediment basins. Such temporary facilities and basins
shall be installed and utilized for stormwater management and sediment
control until stabilization is achieved in accordance with the Standards
for Soil Erosion and Sediment Control in New Jersey, which is incorporated
herein by reference as amended and supplemented.
ii.
If the design engineer determines that, for engineering, environmental
or safety reasons, temporary stormwater management facilities and
sediment basins cannot be constructed on the site, the stormwater
infiltration basin may be placed into operation prior to the complete
stabilization of its drainage area provided that the basin's
bottom during this period is constructed at a depth at least two feet
higher than its final design elevation. All other infiltration BMP
construction requirements in this section shall be followed. When
the drainage area is completely stabilized, all accumulated sediment
shall be removed from the infiltration BMP, which shall then be excavated
to its final design elevation in accordance with the construction
requirements of this section and the performance standards in § IV.
b.
To avoid compaction of subgrade soils of BMP's that rely on
infiltration, no heavy equipment such as backhoes, dump trucks or
bulldozers shall be permitted to operate within the footprint of the
BMP. All excavation required to construct a stormwater infiltration
BMP shall be performed by equipment placed outside the BMP. If this
is not possible, the soils within the excavated area shall be removed
and tilled after construction is completed to reverse the effects
of compaction. In addition, post-development soil permeability testing
shall be performed in accordance with B.5 of this section.
c.
Earthwork associated with stormwater infiltration BMP construction,
including excavation, grading, cutting or filling, shall not be performed
when soil moisture content is above the lower plastic limit.
C.
Safety Standards for Structural Stormwater Management Measures.
1.
If a structural stormwater management measure has an outlet structure,
escape provisions shall be incorporated in or on the structure. Escape
provisions means the permanent installation of ladders, steps, rungs,
or other features that provide readily accessible means of ingress
and egress from the outlet structure.
2.
A trash rack is a device intended to intercept runoff-borne trash
and debris that might otherwise block the hydraulic openings in an
outlet structure of a structural stormwater management measure. Trash
racks shall be installed upstream of such outlet structure openings
as necessary to ensure proper functioning of the structural stormwater
management measure in accordance with the following:
a.
The trash rack should be constructed primarily of bars aligned in
the direction of flow with one inch spacing between the bars to the
elevation of the water quality design storm. For elevations higher
than the water quality design storm, the bars shall be spaced no greater
than 1/3 the width of the hydraulic opening it is protecting or six
inches, whichever is less. Transverse bars aligned perpendicular to
flow should be sized and spaced as necessary for rack stability and
strength.
b.
The trash rack shall not adversely affect the hydraulic performance
of either the outlet structure opening it is protecting or the overall
outlet structure.
c.
The trash rack shall have sufficient net open area under clean conditions
to limit the peak design storm velocity through it to a maximum of
2.5 feet per second.
d.
The trash rack shall be constructed and installed to be rigid, durable,
and corrosion resistant, and shall be designed to withstand a perpendicular
live loading of 300 pounds per square foot.
3.
An overflow grate is a device intended to protect the opening in
the top of a stormwater management measure outlet structure. If an
outlet structure has an overflow grate, such grate shall meet the
following requirements:
a.
The overflow grate shall be secured to the outlet structure but removable
for emergencies and maintenance.
b.
The overflow grate spacing shall be no more than two inches across
the smallest dimension.
c.
The overflow grate shall be constructed and installed to be rigid,
durable, and corrosion resistant, and shall be designed to withstand
a perpendicular live loading of 300 pounds per square foot.
4.
The maximum side slope for an earthen dam, embankment, or berm shall
not e steeper than three horizontal to one vertical.
5.
Safety ledges shall be constructed on the slopes of all new structural
stormwater management measures having a permanent pool of water deeper
than 2 1/2 feet Such safety ledges shall be comprised of two
steps. Each step shall be four to six feet in width. One step shall
be located approximately 2 1/2 feet below the permanent water
surface, and the second step shall be located one to 1 1/2 feet
above the permanent water surface. See a. below, for an illustration
of safety ledges in a stormwater management basin.
a.
Illustration of safety ledges.
ILLUSTRATION ON PAGE 27 OF PINELANDS MANUAL
A.
Applicability. Projects subject to review pursuant to § I.C
of this ordinance shall comply with the requirements of §§ VI.B
and VI.C below.
B.
General Inspection Maintenance and Repair Plan.
1.
The design engineer shall prepare an Inspection Maintenance and Repair
Plan for the stormwater management measures, including both structural
and nonstructural measures incorporated into the design of a major
development. This plan shall be submitted as part of the Checklist
Requirements established in § II.C. Inspection and maintenance
guidelines for stormwater management measures are available in the
New Jersey BMP Manual.
2.
The Inspection, Maintenance and Repair Plan shall contain the following:
a.
Accurate and comprehensive drawings of the site's stormwater
management measures.
b.
Specific locations of each stormwater management measure identified
by means of longitude and latitude as well as block and lot number.
c.
Specific preventative and corrective maintenance tasks and schedules
for such tasks for each stormwater BMP.
d.
Cost estimates, including estimated cost of sediment, debris or trash
removal.
e.
The name, address and telephone number of the person or persons responsible
for regular inspections and preventative and corrective maintenance
(including repair and replacement). If the responsible person or persons
is a corporation, company, partnership, firm, association, municipality
or political subdivision of this State, the name and telephone number
of an appropriate contact person shall also be included.
3.
The person responsible for inspection, maintenance and repair identified
under § VI.B.2 above shall maintain a detailed log of all
preventative and corrective maintenance performed for the site's
stormwater management measures, including a record of all inspections
and copies of all maintenance-related work orders in the Inspection,
Maintenance and Repair Plan. Said records and inspection reports shall
be retained for a minimum of five years.
4.
If the Inspection, Maintenance and Repair Plan identifies a person
other than the developer (for example, a public agency or homeowners'
association) as having the responsibility for inspection and maintenance,
the plan shall include documentation of such person's agreement
to assume this responsibility, or of the developer's obligation
to dedicate a stormwater management measure to such person under an
applicable ordinance or regulation.
5.
If the person responsible for inspection, maintenance and repair
identified under § VI.B.3 above is not a public agency,
the maintenance plan and any future revisions based on § VI.B.6
below shall be recorded upon the deed of record for each property
on which the maintenance described in the maintenance plan shall be
undertaken.
6.
The person responsible for inspection, maintenance and repair identified
under § VI.B.2 above shall evaluate the effectiveness of
the Inspection, Maintenance and Repair Plan at least once per year
and update the plan and the deed as needed.
7.
The person responsible for inspection, maintenance and repair identified
under § VI.B.2 above shall submit the updated Inspection,
Maintenance and Repair Plan and the documentation required by §§ VI.B.2
and VI.B.3 above to Corbin City once per year.
8.
The person responsible for inspection, maintenance and repair identified
under § VI.B.2 above shall retain and make available, upon
request by any public entity with administrative, health, environmental
or safety authority over the site the Inspection, Maintenance and
Repair Plan and the documentation required by § VI.B.2 and
VI.B.3 above.
C.
Responsibility for inspection, repair and maintenance shall not be
assigned or transferred to the owner or tenant of an individual property
in a residential development or project, unless such owner or tenant
owns or leases the entire residential development or project,
D.
Preventative and corrective maintenance shall be performed to maintain
the function of the stormwater management measure, including, but
not limited to: repairs or replacements to any associated appurtenance
of the measure; removal of sediment, debris, or trash; restoration
of eroded areas; snow and ice removal; fence repair or replacement;
restoration of vegetation; repair or replacement of linings; and restoration
of infiltration function.
E.
Stormwater management measure easements shall be provided by the
property owner as necessary for facility inspections and maintenance
and preservation of stormwater runoff conveyance, infiltration, and
detention areas and facilities. The purpose of the treatment shall
be specified in the maintenance agreement.
F.
In the event that the stormwater management measure becomes a public
health nuisance or danger to public safety or public health, or if
it is in need of maintenance or repair, Corbin City shall so notify
the responsibility person in writing. Upon receipt of that notice,
the responsible person shall have 14 days to effect maintenance and
repair of the facility in a manner that is approved by the municipal
engineer or the municipal engineer's designee. Corbin City, at
its discretion, any extent the time allowed for effecting such maintenance
and repair for good cause. If the responsible person fails or refuses
to perform such maintenance and repair within the allowable time,
Corbin City may immediately proceed to do so with its own forces and
equipment and/or through contractors. The costs and expenses of such
maintenance and repair by Corbin City shall be entered on the tax
roll as a special charge against the property and collected with any
other taxes levied thereon for the year in which the maintenance and
repair was performed.
G.
Requirements for Inspection, Maintenance and Repair of Stormwater
BMP's that rely on Infiltration. If a stormwater infiltration
BMP is incorporated into the design of a major development, the applicant
shall include the following requirements in its Inspection, Maintenance
and Repair Plan.
1.
Once per month (if needed): Mow side slopes, remove litter and debris,
stabilizer eroded banks, repair erosion at inflow structure(s).
2.
After every storm exceeding one inch of rainfall: Ensure that infiltration
BMP's drain completely within 72 hours after the storm event.
If stored water fails to infiltrate 72 hours after the end of the
storm, corrective measures shall be taken. Raking or tilling by light
equipment can assist in maintaining infiltration capacity and break
up clogged surfaces.
3.
Four times per year (quarterly): Inspect stormwater infiltration
BMPs for clogging and excessive debris and sediment accumulation within
the BMP, remove sediment (if needed) when completely dry.
4.
Two times per year: Inspect for signs of damage to structure, repair
eroded areas, check for signs of petroleum contamination and remediate.
5.
Once per year: Inspect BMPs for unwanted tree growth and remove if
necessary, disc or otherwise aerate bottom of infiltration basin to
a minimum depth of six inches.
6.
After very storm exceeding one inch of rainfall, inspect and, if
necessary, remove and replace K5 and layer and accumulated sediment,
to restore original infiltration rate.
7.
Additional guidance for the inspection, maintenance and repair of
stormwater infiltration BMPs can be found in the New Jersey BMP Manual.
H.
Financing of Inspection, Maintenance and Repair of Stormwater BMPs.
[5-1-2008 by Ord. No.
7-2008]
Unless specifically defined below, words or phrases used in
the ordinance shall be interpreted so as to give them the meaning
they have in common usage and to give this ordinance its most reasonable
application. When used in this ordinance, the following terms shall
have the meanings herein ascribed to them.
The propagation, rearing and subsequent harvesting of aquatic
organisms in controlled or selected environments, and their subsequent
processing, packaging and marketing, including but not limited to,
activities to intervene in the rearing process to increase production
such as stocking, feeding, transplanting and providing for protection
from predators.
Either a written statement signed and sealed by a licensed
New Jersey Professional Engineer attesting that a BMP design or stormwater
management system conforms to or meets a particular site of standards
or to action taken by the Commission pursuant to N.J.A.C. 7:50-3,
Part II or Part IV. Depending upon the context in which the term is
used, the terms "certify" and "certified" shall be construed accordingly.
The increase in soil bulk density caused by subjecting soil
to greater-than-normal loading. Compaction can also decrease soil
infiltration and permeability rates.
The construction, erection, reconstruction, alteration, conversion,
demolition, removal or equipping of building, structures or components
of a stormwater management system including but not limited to collection
inlets, stormwater piping, swales and all other conveyance systems,
and stormwater BMPs.
The Planning Board, Zoning Board of Adjustment or other board,
agency or official of Corbin City with authority to approve or disapprove
subdivisions, site plans, construction permits, building permits or
other applications for development approval. For the purposes of reviewing
development applications and ensuring compliance with the requirements
of this ordinance, Corbin City may designate the municipal engineer
or other qualified designee to act on behalf of Corbin City.
An agency designated by the County Board of Chosen Freeholders
to review municipal stormwater management plans and implementing ordinance(s).
The county review agency may either be:
A county planning agency; or
A county water resource association created under N.J.S.A.
58:16A-55.5, if the ordinance or resolution delegates authority to
approve, conditionally approve, or disapprove municipal stormwater
management plans and implementing ordinances.
A person professionally qualified and duly licensed in New
Jersey to perform engineering services that may include, but not necessarily
be limited to, development of project requirements, creation and developments
of project design and preparation of drawings and specifications.
The tested permeability rate with a factor of safety of two
applied to it (e.g., if the tested permeability rate of the soils
is four inches per hour, the design rate would be two inches per hour).
The change of or enlargement of any use or disturbance of
any land, the performance of any building or mining operation, the
division of land into two or more parcels, and the creation or termination
of rights of access or riparian rights including, but not limited
to:
A change in type of use of a structure or land.
A reconstruction, alteration of the size, or material change
in the external appearance of a structure or land.
A material increase in the intensity of use of land, such as
an increase in the number of businesses, manufacturing establishments,
offices or dwelling units in a structure or on land.
Commencement of resource extraction or drilling or excavation
on a parcel of land.
Demolition of a structure or removal of trees.
Commencement of forestry activities.
Deposit of refuse, solid or liquid waste or fill on a parcel
of land.
In connection with the use of land, the making of any material
change in noise levels, thermal conditions, or emissions of waste
material.
Alteration, either physically or chemically, of a shore, bank,
or flood plain, seacoast, river, stream, lake, pond, wetlands or artificial
body of water.
In the case of development on agricultural land, i.e. lands
used for an agricultural use or purpose as defined at N.J.A.C. 7:50-2.11,
development means: any activity that requires a State permit; any
activity reviewed by the County Agricultural Boards (CAB) and the
State Agricultural Development Committee (SADC), and municipal review
of any activity not exempted by the Right to Farm Act, N.J.S.A. 4:1C-1
et seq.
|
Any division of land into five or more lots; any construction
or expansion of any housing development of five or more dwelling units;
any construction or expansion of any commercial or industrial use
or structure on a site of more than three acres; or any "development",
grading, clearing or disturbance of an area in excess of 5,000 feet.
Disturbance for the purpose of this ordinance is the placement of
impervious surface or exposure and/or movement of soil or bedrock
or clearing, cutting or removing of vegetation.
All development other than major development.
A geographic area within which stormwater, sediments, or
dissolved materials drain to a BMP, a stormwater management system,
a particular receiving water body or a particular point along a receiving
water body.
An area or feature which is of significant environmental
value, including but not limited to: stream corridors; natural heritage
priority sites; habitat of endangered or threatened animal species;
threatened or endangered plants of the Pinelands pursuant to N.J.A.C.
7:5-6.27(a); large areas of contiguous open space or upland forest;
steep slopes; and well head protection and groundwater recharge areas.
T & E habitat constitutes habitat that is critical for the survival
of a local population of threatened and endangered species or habitat
that is identified using the Department's Landscape Project as
approved by the Department's Endangered and Nongame Species Program,
whichever is more inclusive. Threatened and endangered wildlife shall
be protected in conformance with N.J.A.C. 7:50-6.33.
The approval by the approving authority of a variance or
other material departure from strict compliance with any section,
part, phrase or provision of this ordinance. An exception may be granted
only under certain specific, narrowly-defined conditions described
herein and does not constitute a waiver of strict compliance with
any section, part, phrase or provision of the Pinelands Comprehensive
Management Plan (N.J.A.C. 7:50-1.1 et seq.).
A facility constructed through filling and/or excavation
that provides temporary storage of stormwater runoff. It has an outlet
structure that detains and attenuates runoff inflows and promotes
the settlement of pollutants. An extended detention basin is normally
designed as a multi-stage facility that provides runoff storage and
attenuation for both stormwater quality and quantity management. The
term "stormwater detention basin" shall have the same meaning as "extended
detention basin".
The elevation of the surface of the ground after completion
of final grading, either via cutting, filling or a combination thereof.
Modification of a land slope by cutting and filling with
the native soil or re-distribution of the naive soil which is present
at the site.
Water below the land surface in a zone of saturation.
A test performed to demonstrate that the groundwater below
a stormwater infiltration basin will not "mound up", encroach on the
unsaturated zone, break the surface of the ground at the infiltration
area or downslope, and create an overland flow situation.
Equipment, machinery, or vehicles that exert ground pressure
in excess of eight pounds per square inch.
An area in an individual or commercial development site:
where solvents and/or petroleum products are loaded/unloaded, stored,
or applied, where pesticides are loaded/unloaded or stored; where
hazardous materials are expected to be present in greater than "reportable
quantities" as defined by the United States Environmental Protection
Agency (EPA) at 40 CFR 302.4; where recharge would be inconsistent
with NJDEP-approved remedial action work plan or landfill closure
plan; and/or where a high risk exists for spills of toxic materials,
such as gas stations and vehicle maintenance facilities. The term
"HPLA" shall have the same meaning as "High Pollutant Loading Area".
A surface that has been covered with a layer of material
so that it is highly resistant to infiltration by water.
A monetary fee collected by Corbin City in lieu of requiring
strict on-site compliance with the groundwater recharge, stormwater
runoff quantity and/or stormwater runoff quality standards established
in this ordinance.
Is the process by which precipitation enters the soil through
its surface.
To assemble, construct, put in place or connect components
of a stormwater management system.
Acts necessary to prevent, limit, remedy or compensate for
conditions that may result from those cases where an applicant has
demonstrated the inability or impracticality of strict compliance
with the stormwater management requirements set forth in N.J.A.C.
7:8, in an adopted regional stormwater management plan, or in a local
ordinance which is as protective as N.J.A.C. 7:8, and an exception
from strict compliance is granted by Corbin City and the Pinelands
Commission.
Guidance developed by the New Jersey Department of Environmental
Protection, in coordination with the New Jersey Department of Agriculture,
the New Jersey Department of Community Affairs, the New Jersey Department
of Transportation, municipal engineers, county engineers, consulting
firms, contractors, and environmental organizations to address the
standards in the New Jersey Stormwater Management Rules, N.J.A.C.
7:8. The BMP manual provides examples of ways to meet the standards
contained in the rule. An applicant may demonstrate that other proposed
management practices will also achieve the standards established in
the rules. The manual, and notices regarding future versions of the
manual, are available from the Division of Watershed Management, NJDEP,
PO Box 418, Trenton, New Jersey, 08625; and on the NJDEP's website,
www.njstormwater.org The term "new Jersey BMP Manual" shall have the
same meaning as "New Jersey Stormwawter Best Management Practices
Manual".
The New Jersey Department of Environmental Protection.
The New Jersey Pollutant Discharge Elimination System as
set forth in N.J.S.A. 58:10A-1 et seq. and N.J.A.C. 7:14-A.
[Ord. No. 3-2008]
A permit issued by the NJDEP pursuant to the authority of
the Water Pollution Control Act, N.J.S.A. 58:10A-1 et seq., and N.J.A.C.
7:14A for a discharge of pollutants.
[Ord. No. 3-2008]
Any human-made or human-induced activity, factor, or condition,
other than a point source, from which pollutants are or may be discharged.
Any human-made or human-induced activity, factor, or condition,
other than a point source, that may temporarily or permanently change
any chemical, physical, biological, or radiological characteristic
of waters of the State from what was or is the natural, pristine condition
of such waters, or that may increase the degree of such change.
Any activity, factor, or condition, other than a point source,
that contributes or may contribute to water pollution.
The term "NPS" shall have the same meaning as "nonpoint source".
|
A stormwater management measure strategy or combination of
strategies that reduces adverse stormwater runoff impacts through
sound site planning and design. Nonstructural BMPs include such practice
as minimizing site disturbance, preserving important site features,
reducing an disconnecting impervious cover, flattening slopes, utilizing
native vegetation, minimizing turf grass lawns, maintaining natural
drainage features and characteristics and controlling stormwater runoff
and pollutants closer to the source. The term "Low Impact Development
technique" shall have the same meaning as "nonstructural BMP".
A chemical element or compound, such as nitrogen or phosphorus,
which is essential to and promotes the development of organisms.
The rate at which water moves through a saturated unit area
of soil or rock material at hydraulic gradient of one, determined
as prescribed in N.J.A.C. 7:9A-6.2 (Tube Permeameter Test), N.J.A.C.
6.5 (Pit Bailing Test) or N.J.A.C. 6.6 (Piezometer Test). Alternative
permeability test procedures may be accepted by the approving authority
provided the test procedure attains saturation of surrounding soils,
accounts for hydraulic head effects on infiltration rates, provides
a permeability are with units expressed in inches per hour and is
accompanied by a published source reference. Examples of suitable
sources include hydrogeology, geotechnical, or engineering text and
design manuals, proceedings of American Permeability Class Rating
Test, as described in N.J.A.C. 7:9A-6.3, nor a Percolation Test, as
described in N.J.A.C. 7:9A-6.4, are acceptable tests for establishing
permeability values for the purpose of complying with this ordinance.
Having a permeability of one inch per hour or faster. The
terms "permeable soil", "permeable rock" and "permeable fill" shall
be construed accordingly.
Any individual, corporation, company, partnership, firm,
association, municipality or political subdivision of this State subject
to municipal jurisdiction pursuant to the Municipal Land Use Law,
N.J.S.A. 40:55D-1 et seq.
The New Jersey Pinelands Comprehensive Management Plan (N.J.A.C.
7:50 1.1 et seq.).
The Commission created pursuant to § 5 of the Pinelands
Protection Act, N.J.S.A. 13:18A-5.
Any discernible, confined, and discrete conveyance, including,
but into limited to, any pipe, ditch, channel, tunnel, conduit, well,
discrete fissure, container, rolling stock, concentrated animal feeding
operation, landfill leachate collection system, vessel, or other floating
craft, from which pollutants are or may be discharged. This term does
not include return flows from irrigated agriculture.
Any dredged spoil, solid waste, incinerator residue, filter
backwash, sewage, garbage, refuse, oil, grease, sewage sludge, munitions,
chemical wastes, biological materials, medical wastes, radioactive
substances (except those regulated under the Atomic Energy Act of
1954, as amended (42 U.S.C. 2011 et seq.), thermal waste, wrecked
or discarded equipment, rock, sand, suspended solids, cellar dirt,
industrial, municipal, agricultural, and construction waste or runoff,
or other residue discharged directly or indirectly to the land, groundwaters
or surface waters of the State, or to a domestic treatment works.
"Pollutant" includes both hazardous and nonhazardous pollutants.
A person licensed to practice Professional Engineering in
the State of New Jersey pursuant to N.J.S.A. 48:8-27 et seq.
The amount of water from precipitation that infiltrates into
the ground and is not evapotranspired.
One of two or more soil samples or tests taken at the same
location (within five feet of each other) and depth, within the same
soil horizon or substratum. In the case of fill material, replicate
tests are tests performed on sub-samples of the same bulk sample packed
to the same bulk density.
A particle size category consisting of mineral particles
which are between 0.05 and 2.0 millimeters in equivalent spherical
diameter. Also, a soil textural class having 85% or more of sand and
a content of silt and clay such that the percentage of silt plus 1.5
times the percentage of clay does not exceed 15, as shown in § XI.C.1
(USDA Soil Textural Triangle).
The upper limit of the shallowest zone of saturation which
occurs in the soil, identified as prescribed in N.J.A.C. 7:9A-5.8.
Solid material, mineral or organic, that is in suspension,
is being transported, or has been moved from its side of origin by
air, water or gravity as a product of erosion.
The lot or lots upon which a major development is to occur
or has occurred.
All unconsolidated mineral and organic material of any origin
which is not a rock substratum, including sediments below the biologically
active and/or weathered zones.
Any material(s) or machinery, located at an industrial facility,
that is directly or indirectly related to process, manufacturing or
other industrial activities, which could be a source of pollutants
in any industrial stormwater discharge to groundwater. Source materials
include, but are not limited to, raw materials; intermediate products,
final products; waste materials; by-products; industrial machinery
and fuels, and lubricants, solvents, and detergents that are related
to process, manufacturing, or other industrial activities that are
expected to stormwater.
Water resulting from precipitation (including rain and snow)
that runs off the land's surface, is transmitted to the subsurface,
or is captured by separate storm sewers or other sewage or drainage
facilities, or conveyed by snow removal equipment.
A basin or other facility constructed within permeable soils
that provides temporary storage of stormwater runoff. An infiltration
BMP does not normally have a structural outlet to discharge runoff
from the stormwater quality design storm. Instead, outflow from an
infiltration BMP is through the surrounding soil. The terms "infiltration
measure" and "infiltration practice" shall have the same meaning as
"stormwater infiltration basin".
Any structural or nonstructural strategy, practice, technology,
process, program, or other method intended to control or reduce stormwater
runoff and associated pollutants, or to induce or control the infiltration
or groundwater recharge of stormwater or to eliminate illicit or illegal
non-stormwater discharges into stormwater conveyances. This includes,
but is not limited to, structural and nonstructural stormwater. Best
Management Practices described in the New Jersey BMP Manual and designed
to meet the standards for stormwater control contained within this
ordinance. The terms "stormwater Best Management Practice" and "stormwater
BMP" shall have the same meaning as "stormwater management measure".
Water flow on the surface of the ground or in storm sewers,
resulting from precipitation.
Unsaturated soil, above the seasonally high water table,
which contains less than 50% by volume of coarse fragments and which
has a tested permeability rate of between one and 20 inches per hour.
Any waters of the State which are not groundwater.
A flood hazard area, which may be influenced by stormwater
runoff from inland areas, but which is primarily caused by the Atlantic
Ocean.
The time it takes for runoff to travel from the hydraulically
most distant point of the drainage area to the point of interest within
a watershed.
The insoluble solid matter suspended in water and stormwater
that is separable by laboratory filtration in accordance with the
procedure contained in the "Standard Methods for the Examination of
Water and Wastewater" prepared and published jointly by the American
Public Health Association, American Water Works Association and the
Water Pollution Control Federation. The term "TSS" shall have the
same meaning as "Total Suspended Solids".
The upper surface of a zone of saturation.
The ocean and its estuaries, all springs, streams and bodies
of surface and groundwater, whether natural or artificial, within
the boundaries of New Jersey or subject to its jurisdiction.
A bored, drilled or driven shaft, or a dug hole, which extends
below the seasonally high water table and which has a depth which
is greater than its largest surface dimension.
A stormwater facility constructed through filling and/or
excavation that provides both permanent and temporary storage of stormwater
runoff. It has an outlet structure that creates a permanent pool and
detains and attenuates runoff inflows and promotes the settling of
pollutants. A stormwater retention basin can also be designed as a
multi-stage facility that also provides extended detention for enhanced
stormwater quality design storm treatment and runoff storage and attenuation
for stormwater quantity management. The term "stormwater retention
basin" shall have the same meaning as "wet pond".
Those lands which are inundated or saturated by water at
a magnitude, duration and frequency sufficient to support the growth
of hydrophytes. Wetlands include lands with poorly drained or very
poorly drained soils as designated by the National Cooperative Soils
Survey of the Soil Conservation Service of the United States Department
of Agriculture. Wetlands include coastal wetlands and inland wetlands,
including submerged lands. The "New Jersey Pinelands Commission Manual
for Identifying and Delineating Pinelands Area Wetlands: A Pinelands
Supplement to the Federal Manual for Identifying and Delineating Jurisdictional
Wetlands", dated January, 1991, as amended, may be utilized in delineating
the extent of wetlands based on the definitions of wetlands and wetlands
soils contained in this section, N.J.A.C. 7:50 2.11, 6.4 and 6.5.
The term "wetland" shall have the same meaning as "wetlands".
Any person who erects, constructs, alters, repairs, converts, maintains, or uses any building, structure or lands in violation of this ordinance shall be subject to the general penalties prescribed in Chapter 103 of this Code.
A.
Methods for Calculating Groundwater Recharge.
1.
The New Jersey Geological Survey Report GSR-32: A Method for Evaluating
Groundwater Recharge Areas in New Jersey. Available at http://www.njgeology.org/geodata/dgs99-1.htm
2.
The New Jersey Groundwater Recharge spreadsheet (NJGRS). Available
in the New Jersey BMP Manual, Chapter 6, at http://www.njstormwater.org/bmpmanual2.htm
B.
NJDEP Nonstructural Strategies Point System.
The New Jersey Stormwater Management Rules at N.J.A.C. 7:8-5.2(a),
and § IV.A. of this Ordinance, require nonstructural stormwater
management strategies to be incorporated into the site design of a
major development. A total of nine strategies are to be used to the
maximum extent practical to meet the groundwater recharge, stormwater
quality and stormwater quantity requirements of the Rules prior to
utilizing structural stormwater management measures. The New Jersey
Nonstructural Stormwater Management Strategies Point System (NSPS)
provides a tool to assist planners, designers and regulators in determining
that the strategies have been used to the "maximum extent practical"
at a major development as required by the Rules. Refer online to http://www.njstormwater.org
for information on the NSPS.
C.
Soils.
1.
USDA Soil Textural Triangle.
ILLUSTRATION ON PAGE 43 OF PINELANDS MANUAL
2.
A-HORIZON
ARTESIAN ZONE OF SATURATION
CHROMA
CLAY
CLAY LOAN
COARSE FRAGMENT
COUNTY SOIL SURVEY REPORT
DIRECT SUPERVISION
EQUIVALENT SPHERICAL DIAMETER
EXCESSIVELY COARSE HORIZON
EXCESSIVELY COARSE SUBSTRATUM
EXTREMELY FIRM CONSISTENCE
FIRM CONSISTENCE
HARD CONSISTENCE
HUE
HYDRAULICALLY RESTRICTIVE HORIZON
HYDRAULICALLY RESTRICTIVE SUBSTRATUM
LOAMY SAND
LOWER PLASTIC LIMIT
MOTTLING
MUNSELL SYSTEM
O-HORIZON
PERCHED ZONE OF SATURATION
PIEZOMETER
PLATY STRUCTURE
REGIONAL ZONE OF SATURATION
SANDY CLAY
SANDY LOAM
SILT
SILT LOAM
SILTY CLAY
SILTY CLAY LOAM
SOIL AGGREGATE
SOIL COLOR
SOIL CONSISTENCE
SOIL HORIZON
SOIL LOG
SOIL MAPPING UNIT
SOIL PHASE
SOIL PROFILE
SOIL SERIES
SOIL STRUCTURAL CLASS
SOIL STRUCTURE
SOIL TEST PIT
SOIL TEXTURAL CLASS
SOIL TEXTURE
STATIC WATER LEVEL
SUBSTRATUM
UNSUITABLE SOIL
USDA SYSTEM OF CLASSIFICATION
VALUE
VERY FIRM CONSISTENCE
VERY HARD CONSISTENCE
ZONE OF SATURATION
Definitions. For the purposes of this appendix, the following terms
shall have the meanings herein ascribed to them.
The uppermost mineral horizon in a normal soil profile. The
upper part of the A-horizon is characterized by maximum accumulation
of finely divided, dark colored organic residues, known as humus,
which are intimately mixed with the mineral particles of the soil.
A zone of saturation which exists immediately below a hydraulically
restrictive horizon, and which has an upper surface that is at a pressure
greater than atmospheric, either seasonally or throughout the year.
The relative purity or strength of a color, a quantity which
decreases with increasing grayness. Chroma is one of the three variables
of soil color as defined in the Munsell system of classification.
A particle size category consisting of mineral particles
which are smaller than 0.002 millimeters in equivalent spherical diameter.
Also, a soiltextural class having more than 40% clay, less than 45%
sand, and less than 40% silt, as shown in § XI.C.1 (USDA
Soil Textural Triangle).
A soil textural class having 27 to 40% clay and 20 to 45%
sand, as shown in § XI.C.1 (USDA Soil Textural Triangle).
A rock fragment contained within the soil which is greater
than two millimeters in equivalent spherical diameter or which is
retained on a two millimeter sieve.
A report prepared by the US Department of Agriculture, Natural
Resources Conservation Service which includes maps showing the distribution
of soil mapping units throughout a particular county together with
narrative descriptions of the soil series shown and other information
relating to the uses and properties of the various soil series.
Control over and direction of work carried out by others
with full knowledge of and responsibility for such work.
Of a particle means the diameter of a sphere which has a
volume equal to the volume of the particle.
A horizon of limited thickness within the soil profile which
provides inadequate removal of pollutants from stormwater due to a
high coarse fragment content, excessively coarse texture and/or excessively
rapid permeability.
A substratum below the soil profile which extends beyond
the depth of soil profile pits and borings and which provides inadequate
removal of pollutants from stormwater due to a high coarse fragment
content, excessive coarse texture and/or excessively rapid permeability.
A type of soil material whose moist aggregated mass crushes
only under very strong pressure; cannot be crushed between the thumb
and forefinger and shall be broken apart bit by bit.
A type of soil material whose moist aggregated mass crushes
under moderate pressure between the thumb and forefinger but resistance
is distinctly noticeable.
A type of soil material whose dry aggregated mass is moderately
resistant to pressure; can be broken in the hands without difficulty
but is barely breakable between the thumb and forefinger.
The dominant spectral color, one of the three variables of
soil color defined within the Munsell system of classification.
A horizon within the soil profile which slows or prevents
the downward or lateral movement of water and which is underlain by
permeable soil horizons or substrata. Any soil horizon which has a
saturated permeability less than one inch per hour is hydraulically
restrictive.
A substratum below the soil profile which slows or prevents
the downward or lateral movement of water and which extends beyond
the depth of profile pits or borings or to a massive substratum. A
substratum which has a saturated permeability less than one inch per
hour is hydraulically restrictive.
A soil textural class, as shown in § XI.C.1 (USDA
Soil Textural Triangle), that has a maximum of 85% to 90% sand with
a percentage of silt plus 1.5 times the percentage of clay not in
excess of 15; or a minimum of 70-85% sand with a percentage of silt
plus 1.5 times the percentage of clay not in excess of 30.
The moisture content corresponding to the transition between
the plastic and semi-solid states to soil consistency. This corresponds
to the lowest soil moisture content at which the soil can be molded
in the fingers to form a rod or wire, 1/8 inches in thickness, without
crumbling.
A color pattern observed in soil consisting of blotches or
spots of contrasting color. The term "mottle" refers to an individual
blotch or sot. The terms "color variegation", depletion" and "iron
concentration" are equivalent to the term "mottling". Mottling due
to redoximorphic reactions is an indication of seasonal or periodic
and recurrent saturation.
A system of classifying soil color consisting of an alpha-numeric
designation for hue, value and chroma, such as "7.5 YR 6/2", together
with a descriptive color name such as "strong brown".
A surface horizon, occurring above the A-horizon in some
soils, which is composed primarily of undecomposed or partially decomposed
plant remains which have not been incorporated into the mineral soil.
A zone of saturation which occurs immediately above a hydraulically
restrictive horizon and which is underlain by permeable horizons or
substrata which are not permanently or seasonally saturated.
A device consisting of a length of metal or plastic pipe,
open at the bottom or perforated within a specified interval, and
used for the determination of depth to water, permeability or hydraulic
head within a specific soil horizon or substratum.
Is characterized by a soil aggregate which as one axis distinctly
shorter than the other two and are oriented with the short axis vertical.
A zone of saturation which extends vertically without interruption
below the depth of soil borings and profile pits.
A soil textural class having 35% or more of clay and 45%
or more of sand, as shown in § XI.C.1 (USDA Soil Textural
Triangle).
A soil textural class, as shown in § XI.C.1 (USDA
Soil Textural Triangle), that has a maximum of 20% clay, and the percentage
of silt plus twice the percentage of clay exceeds 30, and contains
52% or more sand; or less than 7% clay, less than 50% silt, and between
43 and 52% sand.
A particle size category consisting of mineral particles
which are between 0.002 and 0.05 millimeters in equivalent spherical
diameter. It also means a soil textural class having 80% or more of
silt and 12% or less of clay, as shown in § XI.C.1 (USDA
Soil Textural Triangle).
A soil textural class having 50% or more of silt and 12 to
27% of clay; or 50 to 80% of silt and less than 12% of clay, as shown
in § XI.C.1 (USDA Soil Textural Triangle).
A soil textural class having 40% or more of clay and 40%
or more of silt, as shown in § XI.C.1 (USDA Soil Textural
Triangle).
A soil textural class having 27 to 40% of clay and less than
20% of sand, as shown in § XI.C.1 (USDA Soil Textural Triangle).
A naturally occurring unit of soil structure consisting of
particles of sand, silt, clay, organic matter, and coarse fragments
held together by the natural cohesion of the soil.
The soil color name and Munsell color designation determined
by comparison of the moist soil with color chips contained in a Munsell
soil color book.
The resistance of a soil aggregate or clod to being crushed
between the fingers or broke by the hands. Terms of describing soil
consistence described are in N.J.A.C. 7:9A-5.3(h).
A layer within a soil profile differing from layers of soil
above and below it in one or more of the soil morphological characteristics
including color, texture, coarse fragments content, structure, consistent
and mottling.
A description of the soil profile which includes the depth,
thickness, color, texture, coarse fragments content, mottling, structure
and consistencies of each soil horizon or substratum.
An area outlined on a map in a County Soil Survey Report
and marked with a letter symbol designating a soil phase, a complex
of two or more soil phases, or some other descriptive term where no
soil type has been identified.
A specific type of soil which is mapped by the Natural Resources
Conservation Service and which belongs to a soil series described
within the County Soil Survey Report.
A vertical cross-section of undisturbed soil showing the
characteristic horizontal layers or horizons of the soil which have
formed as a result of the combined effects of parent material, topography,
climate, biological activity and time.
A grouping of soil types possessing a specific range of soil
profile characteristics which are described within the County Soil
Survey Report. Each soil series may consist of several "soil phases"
which may differ in slope, texture of the surface horizon or stoniness.
One of the shape classes of soil structure described in N.J.A.C.
7:9A-5.3(g).
The naturally occurring arrangement, within a soil horizon,
of sand, silt and clay particles, coarse fragments and organic matter,
which are held together in clusters or aggregates of similar shape
and size.
An excavation made for the purpose of exposing a soil profile
which is to be described.
One of the classes of soil texture defined within the USDA
system of classification. (Soil Survey Manual, Agricultural Handbook
No. 18, USDA Soil Conservation Service 1962).
The relative proportions of sand, silt and clay in that portion
of the soil which passes through a sieve with two millimeter openings.
The depth below the ground surface or the elevation with
respect to some reference level, of the water level observed within
a soil profile pit or boring, or within a piezometer, after this level
has stabilized or become relatively constant with the passage of time.
A layer of soil or rock material present below the soil profile
and extending beyond the depth of soil borings or profile pits.
All soil other than suitable soil.
The system of classifying soil texture used by the United
States Department of Agriculture which defines 12 soil textural classes
based upon the weight percentages of sand, silt and clay in that portion
of the soil which passes through a sieve with two millimeter (2mm)
openings. The soil textural classes are shown graphically on the USDA
Soil Textural Triangle, as shown in § XI.C.1.
The relative lightness or intensity of a color, one of the
three variables of soil color defined within the Munsell system of
classification.
Is characterized by a moist soil which crushes under strong
pressure; barely crushable between thumb and forefinger.
Is characterized by a dry soil which is resistant to pressure,
can be broken in the hands only with difficulty; not breakable between
the thumb and forefinger.
A layer within or below the soil profile which is saturated
with ground water either seasonally or throughout the year. This includes
both regional and perched zones.
3.
Methods for Assessing Soil Suitability for Infiltration Stormwater
Management BMPs. The results of a subsurface investigation shall serve
as the basis for the site selection and design of stormwater infiltration
BMPs. The subsurface investigation shall include, but not be limited
to, a series of soil test pits and soil permeability tests conducted
in accordance with the following:
a.
All soil test pits and soil permeability results shall be performed
under the direct supervision of a Professional Engineer. All soil
logs and permeability test data shall be accompanied by a certification
by a Professional Engineer. The results and location (horizontal and
vertical) of all soil test pits and soil permeability tests, both
passing and failing, shall be reported to Corbin City.
b.
During all subsurface investigations and soil test procedures, adequate
safety measures shall be taken to prohibit unauthorized access to
the excavations at all times. It is the responsibility of persons
performing or witnessing subsurface investigations and soil permeability
tests to comply with all applicable Federal, State and local laws
and regulations governing occupational safety.
c.
A minimum of two soil test pits shall be excavated within the footprint
of any proposed infiltration BMP to determine the suitability and
distribution of soil types present at the site. Placement of the test
pits shall be within 20 feet of the basin perimeter, located along
the longest axis bisecting the BMP. For BMPs larger than 10,000 square
feet in area, a minimum of one additional soil test pit shall be conducted
within each additional area of 10,000 square feet. The additional
test pit(s) shall be placed approximately equidistant to other test
pits, so as to provide adequate characterization of the subsurface
material. In all cases, where soil and or groundwater properties vary
significantly, additional test pits shall be excavated in order to
accurately characterize the subsurface conditions below the proposed
infiltration BMP. Soil test pits shall extent to a minimum depth of
eight feet below the lowest elevation of the basin bottom or to a
depth that is at least two inches the maximum potential water depth
in the proposed infiltration BMP, whichever is greater.
d.
A soil test pit log shall be prepared for each soil test pit. The
test pit log shall, at a minimum, provide the elevation of the existing
ground surface, the depth and thickness (in inches) of each soil horizon
or substratum, the dominant matrix or background and mottle colors
using the Munsell system of classification for hue, value and chroma,
the appropriate textural class as shown on the USDA textural triangle,
the volume percentage of coarse fragments (larger than two millimeters
in diameter), the abundance, size, and contrast of mottles, the soil
structure, soil consistence, and soil moisture condition, using standard
USDA classification terminology for each of these soil properties.
Soil test pit logs shall identify the presence of any soil horizon,
substratum or other feature that exhibits an in-place permeability
rate less than one inch per hour.
e.
Each soil test pit shall report the depth to seasonally high water
level, either perched or regional and the static water level based
upon the presence of soil mottles or other redoximorphic features,
and observed seepage or saturation. Where redoxomorphic features including
soil mottles resulting from soil saturation are present, they shall
be interpreted to represent the depth to the seasonal high water table
unless soil saturation or seepage is observed at a high level. When
the determination of the seasonally high water table shall be made
in ground previously disturbed by excavation, direct observation of
the static water table during the months of January through April
shall be the only method permitted.
f.
Any soil horizon or substratum which exists immediately below a perched
zone of saturation shall be deemed by rule to exhibit unacceptable
permeability (less than one inch per hour). The perched zone of saturation
may be observed directly, inferred based upon soil morphology, or
confirmed by performance of a hydraulic head test as defined at N.J.A.C.
7:9A-5.9.
g.
Stormwater infiltration BMPs shall not be installed in soils that
exhibit artesian groundwater conditions. A permeability test shall
be conducted in all soils that immediately underlie a perched zone
of saturation. Any zone of saturation which is present below a soil
horizon which exhibits an in-place permeability of less than 0.2 inches
per hour shall be considered an artesian zone of saturation unless
a minimum one-foot thick zone of unsaturated soil, free of mottling
or other redoximorphic features and possessing a chroma of four or
higher, exists immediately below the unsuitable soil.
h.
A minimum of one permeability test shall be performed at each soil
test pit location. The soil permeability rate shall be determined
using test methodology as prescribed in N.J.A.C. 7:9A-6.2 (Tube Permeameter
Test), 6.5 (Pit Bailing Test) or 6.6 (Piezometer Test). When the tube
permeameter test is used, a minimum of two replicate samples shall
be taken and tested. Alternative permeability test procedures may
be accepted by the approving authority provided the test procedure
attains saturation of surrounding soils, accounts for hydraulic head
effects on infiltration rates, provides a permeability rate with units
expressed in inches per hour and is accompanied by a published source
reference. Examples of suitable sources include hydrogeology, geotechnical
or engineering test and design manuals, proceedings of American Society
for Testing and Materials (ASTM) symposia, or peer-review journals.
Neither a Soil Permeability Class Rating Test, as described in N.J.A.C.
7:9A-6.3, nor a Percolation Test, as described in N.J.A.C. 7:9A-6.4,
are acceptable tests for establishing permeability values for the
purpose of complying with this ordinance.
i.
Soil permeability tests shall be conducted on the most hydraulically
restrictive horizon or substratum to be left in place below the basin
as follows. Where no soil replacement is proposed, the permeability
tests shall be conducted on the most hydraulically restrictive horizon
or substratum within four feet of the lowest elevation of the basin
bottom or to a depth equal to two times the maximum potential water
depth within the basin, whichever is greater. Where soil replacement
is proposed, the permeability tests shall be conducted within the
soil immediately below the depth of proposed soil replacement or within
the most hydraulically restrictive horizon or substratum to a depth
equal to two times the maximum potential water depth within the basin,
whichever is greater. Permeability tests may be performed on the most
hydraulically restrictive soil horizons or substrata at depths greater
than those identified above based upon the discretion of the design
or testing engineer. The tested infiltration rate should then be divided
by two to establish the soil's design permeability rate. Such
division will provide a 100% safety factor to the tested rate.
j.
The minimum acceptable "tested permeability rate" of any soil horizon
or substratum shall be one inch per hour. Soil materials that exhibit
tested permeability rates slower than one inch per hour shall be considered
unsuitable for stormwater infiltration. The maximum reportable "tested
Permeability rate" of any soil horizon or substratum shall be no greater
than 20 inches per hour regardless of the rate attained in the test
procedure.
k.
After all construction activities have been completed on the development
site and the finished grade has been established in the infiltration
BMP, a minimum of one permeability test shall be conducted within
the most hydraulically restrictive soil horizon or substratum below
the as-built BMP to ensure the performance of the infiltration BMP
is as designed. Hand tools and manual permeability test procedures
shall be used for the purpose of confirming BMP performance. In addition,
the infiltration BMP shall be flooded with water sufficient to demonstrate
the performance of the BMP. Test results shall be certified to the
municipal engineer.
l.
A groundwater mounding analysis shall be provided for each stormwater
infiltration BMP. The groundwater mounding analysis shall calculate
the maximum height of the groundwater mound based upon the volume
of the maximum design storm. The Professional Engineer conducting
the analysis shall provide the municipal engineer with the methodology
and supporting documentation for the mounding analysis used and shall
certify to Corbin City, based upon the analysis, that the groundwater
mound will not cause stormwater or groundwater to break out to the
and surface or cause adverse impact to adjacent surface water bodies,
wetlands or subsurface structures including but not limited to basements
and septic systems. If there is more than one infiltration BMP proposed,
the model shall indicate if and how the mounds will interact. The
mounding analysis shall be calculated using the most restrictive soil
horizon that will remain in place within the explored aquifer thickness
unless alternative analyses is authorized by the municipal engineer.
The mounding analysis shall be accompanied by a cross-section of the
infiltration BMP and surrounding topography and the mound analysis
shall extent out to the point(s) at which the mound intersects with
the preexisting maximum water table elevation.
m.
The applicant shall demonstrate that stormwater infiltration BMPs
meet the seventy-two hour drain time requirement established in § V.B.1
of this ordinance.
D.
Pretreatment measures for infiltration BMPs. By reducing incoming
velocities and capturing coarser sediments, pretreatment can extent
the functional life and increase the pollutant removal capability
of infiltration measures. Therefore, the installation of pretreatment
measures is recommended for all development sites. Pretreatment measures
may include, but are not limited to, the following:
E.
Collection and Conveyance.
1.
Bicycle-safe inlet grates. Site development plans that incorporate
site design features that help to prevent discharge of trash and debris
from drainage systems shall comply with the following standard to
control passage of solid and floatable materials through storm drain
inlets. For purposes of this paragraph, "solid and floatable materials"
means sediment, debris, trash, and other floating, suspended, or settleable
solids.
a.
Design engineers shall use either of the following grates whenever
they use a grate in pavement or another ground surface to collect
stormwater from that surface into a storm drain or surface water body
under that grate:
i.
The New Jersey Department of Transportation (NJDOT) bicycle
safe grate, which is described in Chapter 2.4 of the NJDOT Bicycle
Compatible Roadways and Bikeways Planning and Design Guidelines (April
1996).
ii.
A different grate, if each individual clear space in that grate
has an area of no more than seven square inches, or is no greater
than 0.5 inch across the smallest dimension. Examples of grates subject
to this standard include grates in grate inlets, the grate portion
(non-curb-opening portion) of combination inlets, grates on storm
sewer manholes, ditch grates, trench grates, and grates of spacer
bars in slotted rains. Examples of ground surfaces include surfaces
of roads (including bridges), driveways, parking areas, bikeways,
plazas, sidewalks, lawns, fields, open channels, and stormwater basin
floors.
b.
Whenever design engineers use a curb-opening inlet, the clear space
in that curb opening (or each individual clear space, if the curb
opening has two or more clear spaces) shall have an area of no more
than seven square inches, or be no greater than two inches across
the smallest dimension.
c.
This standard does not apply:
i.
Where the review agency determines that this standard would
cause inadequate hydraulic performance that could not practicably
be overcome by using additional or larger storm drain inlets that
meet these standards.
ii.
Where flows from the water quality
design storm as specified in § III are conveyed through
any device (e.g., end-of-pipe netting facility, manufactured treatment
device, or a catch basin hood) that is designed, at a minimum, to
prevent delivery of all solid and floatable materials that could not
pass through one of the following:
iii.
Where flows are conveyed through a trash rack that has parallel
bars with one inch spacing between the bars, to the elevation of the
water quality design storm as specified in § III of this
ordinance.
iv.
Where the NJDEP determines, pursuant to the New Jersey Register
of Historic Places Rules at N.J.A.C. 7:4-7.2(c), that action to meet
this standard is an undertaking that constitutes an encroachment or
will damage or destroy the New Jersey Register listed historic property.
2.
Catch basins. Catch basins are storm drain inlets with or without
sumps. Catch basins may provide pretreatment for other stormwater
BMPs by capturing large sediments. The sediment and pollutant removal
efficiency of catch basins depends on the size of the sump and the
performance of routine maintenance to retain the available sediment
storage space in the sump. Where catch basins with sumps are proposed,
the minimum two feet separation between the bottom of the sump and
seasonally high water table shall be provided.
3.
Open or perforated conveyance piping. Where adequate separation to
the seasonal high water table exists, stormwater from the development
site may be conveyed to a stormwater basis via a system of perforated
pipes. These pipes may be made of PVC or corrugated metal and are
available with perforations of varying size and spacing. Perforated
pipe specifications shall be certified by a Professional Engineer.
A Professional Engineer shall certify that perforated conveyance piping
will not act to intercept the seasonal high water table and convey
groundwater to the stormwater basin. All open or perforated stormwater
conveyance systems shall be installed with a minimum separation of
two feet from the seasonal high water table.
|
Section XII. Additional Sources for Technical Guidance.
| ||
A.
|
NJDEP Technical Guidance Sources.
| |
1.
|
New Jersey BMP Manual. Available from the Division of Watershed
Management, New Jersey Department of Environmental Protection, PO
Box 418, Trenton, new Jersey, 08625, or online at http://www.njstormwater.org
| |
2.
|
NJDEP Stormwater Management Facilities Maintenance Manual. Available
from the Division of Watershed Management, New Jersey Department of
Environmental Protection, PO Box 418, Trenton, New Jersey, 08625,
or online at http://njedl.rutgers.edu/ftp/PDFs/1188.pdf
| |
B.
|
Additional Guidance Sources
| |
1.
|
New Jersey Pinelands Commission, PO Box 7, 15 Springfield Road,
New Lisbon, New Jersey, 08064, Phone: 609-894-7300, website: http://www.state.nj.us/pinelands
| |
2.
|
State Soil Conservation Committee Standards for Soil Erosion
and Sediment Control in New Jersey. Available from all State Soil
Conservation Districts, including Burlington County Soil Conservation
District, Tiffany Square, Suite 100, 1289 Route 38, Hainesport, New
Jersey, 08036, Phone: 609-267-7410, Fax 609-267-3347, website: http://bscd.org
Cape Atlantic Soil Conservation District.
| |
3.
|
State Soil Conservation Districts, Cape Atlantic Soil Conservation
District.
| |
4.
|
New Jersey Department of Transportation, PO Box 600, Trenton,
NJ, 08625-0600, Phone: 609-530-3536, website: http://www.state.nj.us/transportation
|
|
Pinelands Preservation Area Map
| |
City of Corbin City
| |
Zoning Districts
| |
Pinelands Forest Area
| |
Manufacturing Commercial
| |
Highway Agricultural/Low
| |
Density
| |
Residential
| |
Map on file in office of City Clerk
|