[Added 4-5-2006 by Ord. No. 05-2006; amended 3-17-2021 by Ord. No. 03-2021]
A.
Policy statement.
(1)
West Amwell Township identified stormwater management as an
important municipal planning concern in its 2003 Master Plan and the
Stormwater Plan that the Township Committee adopted in 2005. As the
Master Plan notes, West Amwell is a predominantly rural municipality
where agriculture is the main land use. The Master Plan also identifies
environmentally sensitive areas in West Amwell, in particular the
Sourland Region, which is the predominant natural feature in the Township.
In addition, West Amwell's five main streams all have excellent water
quality which could easily be impaired by poorly managed stormwater
runoff from future development.
(2)
In its Master Plan and ordinances, West Amwell Township has
taken steps to plan more effectively for future land use changes in
these areas of the Township. Additional planning and protections are
needed to prevent erosion, increased sediment and pollutants, and
other problems caused by poorly managed runoff that have impaired
environmental quality in so many other parts of New Jersey.
(3)
Stormwater runoff is part of the largest remaining major source
of pollutants in our nation's waters and the quality of surface and
groundwater is directly related to the health of the environment.
It is estimated that up to 60% of existing water pollution problems
are attributable to nonpoint source pollution. Nonpoint source pollution
and, particularly, stormwater runoff is difficult to identify, control,
and treat. In natural environments, undisturbed by development, native
vegetation either directly intercepts precipitation or draws from
runoff that has infiltrated into the ground and returns it to the
atmosphere through the process of evapotranspiration. Precipitation
also runs off the land's surface to become surface water or infiltrates
through the soil to naturally recharge groundwater. This process,
known as the "hydrologic cycle," functions in equilibrium, but is
extremely susceptible to changes in the cycle's processes.
(4)
It has been shown that land development dramatically affects
the hydrology of a watershed if the effects of stormwater runoff are
not considered carefully. Development typically alters natural vegetation
through the placement of lawns and impervious cover, thereby reducing
the watershed's evaporation, transpiration and infiltration rates.
Construction activities compact the soil and reduce its infiltration
capability, resulting in increased volumes and rates of stormwater
runoff from a site. Infrastructure and impervious surfaces transport
runoff more quickly than natural areas and cause erosion and water
quality problems, as well as flooding in areas downstream of development.
Effective stormwater management is essential to preventing these serious
impacts of development. Public education is an important component
of stormwater management because people often do not realize the impact
on streams, lakes and private wells from putting motor oil or trash
into a storm sewer or from excessive use of fertilizers and pesticides.
Individually these acts may seem insignificant, but their cumulative
impact contributes to stormwater/nonpoint source pollution and reduces
water quality.
(5)
Flood control, groundwater recharge, and pollutant reduction
shall be achieved through the use of stormwater management measures,
including green infrastructure best management practices (GI BMPs)
and nonstructural stormwater management strategies. GI BMPs and low-impact
development (LID) should be utilized to meet the goal of maintaining
natural hydrology to reduce stormwater runoff volume, reduce erosion,
encourage infiltration and groundwater recharge, and reduce pollution.
GI BMPs and LID should be developed based upon physical site conditions
and the origin, nature and the anticipated quantity, or amount, of
potential pollutants. Multiple stormwater management BMPs may be necessary
to achieve the established performance standards for water quality,
quantity, and groundwater recharge.
B.
Purpose. This Stormwater Article is designed to accomplish the goals
of the West Amwell Township Stormwater Plan, which the Township Committee
adopted in April 2005. The goals of this article include:
(1)
Meeting state and federal regulatory requirements for stormwater
management.
(2)
Protecting all surface water and groundwater resources from
degradation and diminution.
(3)
Preserving the rural character of West Amwell Township and protecting
environmentally sensitive areas that could be affected by stormwater.
(4)
Minimizing or reducing stormwater runoff rates and volumes from
new and existing development.
(5)
Maintaining the integrity and stability of stream channels and
buffers for the overall environmental and ecological benefits and
functions they provide, especially biological functions, as well as
for drainage, the conveyance of floodwater and other purposes.
(6)
Reducing current levels of nonpoint source pollution, and preventing
an increase in nonpoint source pollution from future development.
(7)
Preserving woodlands and other undisturbed areas, especially
along streams, and protecting natural features, including forest understory
and vegetated riparian buffers.
(8)
Reducing, minimizing or eliminating soil erosion and the transport
of sediment from any development or construction project.
(9)
Minimizing or eliminating pollutants in stormwater runoff from
new and existing development to restore, enhance, and maintain the
chemical, physical, and biological integrity of waters of the state.
(10)
Enhancing domestic, municipal, recreational, industrial, and
other uses of water bodies.
(11)
Maintaining and enhancing groundwater recharge.
(12)
Promoting cooperative efforts with the county and neighboring
municipalities to achieve common goals cooperatively.
(13)
Preventing flood damage, including damage to public health,
life and property.
(14)
Protecting fish and other aquatic life, and scenic and ecological
values of rivers and streams.
(15)
Assuring the adequacy of all culverts and bridges, and other
in-stream structures.
(16)
Protecting the public by minimizing public safety hazards through
the proper design and operation of stormwater basins or other stormwater
detention facilities.
(17)
Minimizing the deterioration of existing structures that would
result from increased rates and volumes of stormwater runoff.
(18)
Maintaining adequate baseflow and natural flow regimes in all
streams and other surface water bodies to protect the aquatic ecosystem.
(19)
Ensuring that any development that creates 1/4 acre or more
of impervious cover or creates one acre or more of disturbance must
comply with this article, as required by West Amwell Township's Tier
B NJPDES permit.
C.
Applicability.
(1)
This article shall be applicable to building permits as covered
by this chapter and all site plans and subdivisions for the following
major developments that require preliminary or final site plan or
subdivision review:
(a)
Nonresidential major developments; and
(b)
Aspects of residential major developments that are not preempted
by the Residential Site Improvement Standards at N.J.A.C. 5:21. The
provisions of both this chapter and the RSIS are to be applied and
reviewed concurrently for any residential major development.
(c)
In the case of agricultural or horticultural development that
meets the definition of "major development" under N.J.A.C. 7:8, a
farm conservation plan or a soil erosion and sediment control plan
that addresses the protection of soil and water resources shall be
developed and implemented. Such a plan shall be approved by the Hunterdon
County Soil Conservation District.
(2)
This article shall also be applicable to all major developments
undertaken by West Amwell Township.
(3)
This article does not apply to activities of Hunterdon County,
the State of New Jersey and the government of the United States of
America when those activities are specifically exempted from municipal
regulation by relevant state or federal law.
D.
Compatibility with other permit and ordinance requirements.
(1)
Development approvals issued for subdivisions and site plans
pursuant to this article 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
code, rule, act, or ordinance. In their interpretation and application,
the provisions of this article shall be held to be the minimum requirements
for the promotion of the public health, safety, and general welfare.
(2)
This article shall be construed to assure consistency with the
requirements of New Jersey laws and acts amendatory thereof or supplementary
thereto, applicable implementing regulations, and any existing or
future municipal NJPDES permits and any amendments or revisions thereto
or reissuance thereof.
(3)
This article 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 article
imposes restrictions different from those imposed by any other ordinance,
rule or regulation, or other provision of law, the more restrictive
provisions or higher standards shall control.
For the purpose of this article, the following terms, phrases,
words and their derivations shall have the meanings stated herein
unless their use in the text of this chapter clearly demonstrates
a different meaning. When not inconsistent with the context, words
used in the present tense include the future, words used in the plural
number include the singular number, and words used in the singular
number include the plural number. The word "shall" is always mandatory
and not merely directory. The definitions below are the same as or
based on the corresponding definitions in the Stormwater Management
Rules at N.J.A.C. 7:8-1.2.
Construction for the purposes of supporting common farmsite
activities, including, but not limited to, the production, harvesting,
storage, grading, packaging, processing, and the wholesale and retail
marketing of crops, plants, animals, and other related commodities
and the use and application of techniques and methods of soil preparation
and management, fertilization, weed, disease, and pest control, disposal
of farm waste, irrigation, drainage and water management, and grazing.
The use of the land for common farmsite activities, including,
but not limited to, production, harvesting, storage, grading, packaging,
processing and the wholesale and retail marketing of crops, plants,
animals and other related commodities and the use and application
of techniques and methods of soil preparation and management, fertilization,
weed, disease and pest control, disposal of farm waste, irrigation,
drainage, and water management, and grazing.
Those areas with boundaries incorporated by reference or
revised by the Department in accordance with N.J.A.C. 7:7-13.16.
The map used by the Department to identify the location of
Coastal Planning Areas, CAFRA centers, CAFRA cores, and CAFRA nodes.
The CAFRA Planning Map is available on the Department's Geographic
Information System (GIS).
Waters of the state as designated in N.J.A.C. 7:9B-1.15(c)
through (h) for purposes of implementing the antidegradation policies
set forth at N.J.A.C. 7:9B-1.5(d) for protection from measurable changes
in water quality characteristics because of their clarity, color,
scenic setting, other characteristics of aesthetic value, exceptional
ecological significance, exceptional recreational significance, exceptional
water supply significance, or exceptional fisheries resource(s).
An infiltration system, sand filter designed to infiltrate,
standard constructed wetland, or wet pond, established in accordance
with N.J.A.C. 7:8-4.2(c)14, that is designed and constructed in accordance
with the New Jersey Stormwater Best Management Practices Manual, or
an alternate design, approved in accordance with N.J.A.C. 7:8-5.2(g),
for an infiltration system, sand filter designed to infiltrate, standard
constructed wetland, or wet pond and that complies with the requirements
of this chapter.
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 area from which stormwater runoff drains to a stormwater
management measure, not including the area of the stormwater management
measure itself.
A pedestrian-oriented area of commercial and civic uses serving
the surrounding municipality, generally including housing and access
to public transportation.
The Hunterdon County Planning Board, as designated by the
County Commissioners, to review municipal stormwater management plans
and implementing ordinance(s). The county review agency may either
be:
The New Jersey Department of Environmental Protection.
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 development
of project design and preparation of drawings and specifications.
A state development and redevelopment plan center as designated
by the State Planning Commission such as urban, regional, town, village,
or hamlet.
The division of a parcel of land into two or more parcels, the
construction, reconstruction, conversion, structural alteration, relocation
or enlargement of any building or structure, any mining excavation
or landfill, and any use or change in the use of any building or other
structure, or land or extension of use of land, for which permission
is required under the Municipal Land Use Law, N.J.S.A. 40:55D-1 et
seq.
In the case of development of agricultural land, development
means: any activity that requires a State permit, any activity reviewed
by the County Agricultural Board (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.
The placement or reconstruction of impervious surface or
motor vehicle surface, or exposure and/or movement of soil or bedrock
or clearing, cutting, or removing of vegetation. Milling and repaving
is not considered disturbance for the purposes of this definition.
A geographic area within which stormwater, sediments, or
dissolved materials drain to a particular receiving waterbody or to
a particular point along a receiving waterbody.
Neighborhoods designated by the Urban Coordinating Council
"in consultation and in conjunction with" the New Jersey Redevelopment
Authority pursuant to N.J.S.A. 55:19-69.
The following areas where the physical alteration of the
land is in some way restricted, either through regulation, easement,
deed restriction or ownership, such as wetlands, floodplains, threatened
and endangered species sites or designated habitats, and parks and
preserves. Habitats of endangered or threatened species are identified
using the Department's Landscape Project as approved by the Department's
Endangered and Nongame Species Program.
An area or feature which is of significant environmental
value, including but not limited to stream corridors, natural heritage
priority sites, habitats of endangered or threatened species, large
areas of contiguous open space or upland forest, steep slopes, and
wellhead protection and groundwater recharge areas. Habitats of endangered
or threatened species are identified using the Department's Landscape
Project as approved by the Department's Endangered and Nongame Species
Program.
The detachment and movement of soil or rock fragments by
water, wind, ice, or gravity.
A stormwater management measure that manages stormwater close
to its source by:
A body of water below the surface of the land in a zone of
saturation where the spaces between the soil or geological materials
are fully saturated with water.
An area within which water drains to a particular receiving
surface water body, also known as a subwatershed, which is identified
by a 14-digit hydrologic unit boundary designation, delineated within
New Jersey by the United States Geological Survey.
A surface that has been covered with a layer of material
so that it is highly resistant to infiltration by water relative to
natural conditions in the area.
The process by which water seeps into the soil from precipitation
to a level below the normal root system of plant species.
One or more public entities having stormwater management
planning authority designated by the regional stormwater management
planning committee pursuant to N.J.A.C. 7:8-3.2, that serves as the
primary representative of the committee.
Methods incorporating design measures to replicate predevelopment
hydrology to reduce the impacts of development at a lot-level basis,
treating rainwater where it falls by creating conditions that allow
the water to infiltrate back into the ground. LID emphasizes greater
infiltration of stormwater on site rather than regarding the stormwater
as a nuisance condition and disposable.
A document required for all major development projects for
stormwater management maintenance. The document shall contain specific
preventive maintenance tasks and schedules; cost estimates, including
estimated cost of sediment, debris, or trash removal; and the name,
address, and telephone number of the person or persons responsible
for preventive and corrective maintenance (including replacement).
An individual development, as well as multiple developments
that individually or collectively result in:
The disturbance of one or more acres of land since February
2, 2004;
The creation of 1/4 acre or more of regulated impervious surface
since February 2, 2004;
The creation of 1/4 acre or more of regulated motor vehicle
surface since March 2, 2021 (or the effective date of this article,
whichever is earlier); or
Major development includes all developments that are part of a common plan of development or sale (for example, phased residential development) that collectively or individually meet any one or more of Subsection A(1), (2), (3), or (4) above. Projects undertaken by any government agency that otherwise meet the definition of "major development" but which do not require approval under the Municipal Land Use Law, N.J.S.A. 40:55D-1 et seq., are also considered major development.
Compliance with the specific objective to the greatest extent
possible taking into account equitable considerations and competing
factors, including, but not limited to, environmental benefits, pollutant
removal effectiveness, regulatory compliance, ability to implement
given site-specific environmental conditions, cost and technical or
engineering feasibility.
Land vehicles propelled other than by muscular power, such
as automobiles, motorcycles, autocycles, and low-speed vehicles. For
the purposes of this definition, "motor vehicle" does not include
farm equipment, snowmobiles, all-terrain vehicles, motorized wheelchairs,
go-carts, gas buggies, golf carts, ski-slope grooming machines, or
vehicles that run only on rails or tracks.
Any pervious or impervious surface that is intended to be
used by motor vehicles and/or aircraft, and is directly exposed to
precipitation including, but not limited to, driveways, parking areas,
parking garages, roads, racetracks, and runways.
West Amwell Township.
The manual maintained by the Department providing, in part, design specifications, removal rates, calculation methods, and soil testing procedures approved by the Department as being capable of contributing to the achievement of the stormwater management standards specified in this chapter. The BMP Manual is periodically amended by the Department as necessary to provide design specifications on additional best management practices and new information on already included practices reflecting the best available current information regarding the particular practice and the Department's determination as to the ability of that best management practice to contribute to compliance with the standards contained in this chapter. Alternative stormwater management measures, removal rates, or calculation methods may be utilized, subject to any limitations specified in this chapter, provided the design engineer demonstrates to the municipality, in accordance with § 109-254F of this article and N.J.A.C. 7:8-5.2(g), that the proposed measure and its design will contribute to achievement of the design and performance standards established by this chapter.
An area designated by the State Planning Commission concentrating
facilities and activities which are not organized in a compact form.
A chemical element or compound, such as nitrogen or phosphorus,
which is essential to and promotes the development of organisms.
The amount of a nutrient in a defined volume of water (such
as milligrams of nitrogen per liter). The relationship between nutrient
concentration and nutrient load can vary and depends on the surface
water flow, the volume of water in the water body or aquifer, and
watershed characteristics.
The total amount of a nutrient, such as nitrogen or phosphorus,
entering the water during a given time, such as tons of nitrogen per
year, or pounds of phosphorus per day. Nutrients may enter the water
from runoff, groundwater recharge, point source discharges, or the
air (in the form of wet deposition such as rain or snow as well as
dry deposition).
A surface or land cover capable of transmitting or percolating
a significant amount of precipitation into the underlying soils.
Any individual, corporation, company, partnership, firm,
association, political subdivision of this state and any state, interstate
or federal agency.
Any dredged spoil, solid waste, incinerator residue, filter
backwash, sewage, garbage, refuse, oil, grease, sewage sludge, munitions,
chemical wastes, biological materials, medical wastes, radioactive
substance [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, 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.
The amount of water from precipitation that infiltrates into
the ground and is not evapotranspired.
Any of the following, alone or in combination:
A net increase of impervious surface;
The total area of impervious surface collected by a new stormwater
conveyance system (for the purpose of this definition, a "new stormwater
conveyance system" is a stormwater conveyance system that is constructed
where one did not exist immediately prior to its construction or an
existing system for which a new discharge location is created);
The total area of impervious surface proposed to be newly collected
by an existing stormwater conveyance system; and/or
The total area of impervious surface collected by an existing
stormwater conveyance system where the capacity of that conveyance
system is increased.
Any of the following, alone or in combination:
The total area of motor vehicle surface that is currently receiving
water;
A net increase in motor vehicle surface; and/or quality treatment
either by vegetation or soil, by an existing stormwater management
measure, or by treatment at a wastewater treatment plant, where the
water quality treatment will be modified or removed.
The municipal body or official that is responsible for the
review of a major development project for compliance with the stormwater
management requirements.
Solid material, mineral or organic, that is in suspension,
is being transported, or has been moved from its site 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.
Sediment, debris, trash, and other floating, suspended, or
settleable solids.
Any material(s) or machinery, located at an industrial facility,
that is directly or indirectly related to process, manufacturing,
or other industrial activities, that could be a source of pollutants
in any industrial stormwater discharge to groundwater or surface water.
Source materials include, but are not limited to, raw materials, intermediate
products, final products, waste materials, byproducts, industrial
machinery and fuels, and lubricants, solvents, and detergents that
are related to process, manufacturing, or other industrial activities
that are exposed to stormwater.
Water bodies receiving special protections due to their drinking
water status or role as high-quality habitat for threatened and endangered
species or species of commercial or recreational importance. This
includes waterways so designated through the NJ Stormwater Management
Rules (N.J.A.C. 7:8) because of exceptional ecological significance,
exceptional water supply significance, exceptional recreational significance,
exceptional shellfish resource, or exceptional fisheries resource.
Waters so designated are protected by a 300-foot buffer extending
on either side of the waterway measured perpendicular from top-of-bank
or center of channel for waterways lacking a defined top-of-bank.
See definition of "Category One (C1)."
An area delineated on the State Plan Policy Map and adopted
by the State Planning Commission that is intended to be the focus
for much of the state's future redevelopment and revitalization efforts.
The geographic application of the State Development and Redevelopment
Plan's goals and statewide policies, and the official map of these
goals and policies.
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.
An excavation or embankment and related areas designed to
retain stormwater runoff. A stormwater management BMP may either be
normally dry (that is, a detention basin or infiltration system),
retain water in a permanent pool (a retention basin), or be planted
mainly with wetland vegetation (most constructed stormwater wetlands).
Any 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 nonstormwater discharges
into stormwater conveyances.
A public body authorized by legislation to prepare stormwater
management plans.
The geographic area for which a stormwater management planning
agency is authorized to prepare stormwater management plans, or a
specific portion of that area identified in a stormwater management
plan prepared by that agency.
Water flow on the surface of the ground or in storm sewers,
resulting from precipitation.
A strip of land located immediately adjacent to a stream
channel consisting of natural, undisturbed vegetative cover, which
serves as a transition area between uplands and riparian lands to
trap sediments from upslope erosion and filter fertilizers, pesticides,
and other pollutants that run off farmland and other developed areas.
A stream buffer may encompass wetlands, may contain a floodplain or
floodway or may extend beyond a wetland, floodplain or floodway boundary.
This buffer supports trees, shrubs, grasses, and other plant and animal
species that depend on changeable conditions.
The downstream surface water elevation at a discharge (pipe,
weir, spillway, channel, etc.).
Species whose prospects for survival in New Jersey are in
immediate danger because of a loss or change in habitat, overexploitation,
predation, competition, disease, disturbance or contamination. Assistance
is needed to prevent future extinction in New Jersey. Threatened species
are those which may become endangered if conditions surrounding them
begin to or continue to deteriorate. Suitable habitats of endangered
or threatened species are those identified by the Department's Landscape
Project as approved by the Department's Endangered and Nongame Species
Program.
A flood hazard area in which the flood elevation resulting
from the two-, ten-, or 100-year storm, as applicable, is governed
by tidal flooding from the Atlantic Ocean. Flooding in a tidal flood
hazard area may be contributed to, or influenced by, stormwater runoff
from inland areas, but the depth of flooding generated by the tidal
rise and fall of the Atlantic Ocean is greater than flooding from
any fluvial sources. In some situations, depending upon the extent
of the storm surge from a particular storm event, a flood hazard area
may be tidal in the 100-year storm, but fluvial in more frequent storm
events.
The time it takes for stormwater runoff to travel from the
hydraulically most distant point of the watershed to the point of
interest within a watershed.
An area of protected upland adjacent to a freshwater wetland
that minimizes adverse impacts on the wetland or serves as an integral
component of the wetlands ecosystem. Also called "buffer area."
A neighborhood given priority access to state resources through
the New Jersey Redevelopment Authority.
A zone designated by the New Jersey Enterprise Zone Authority
pursuant to the New Jersey Urban Enterprise Zones Act, N.J.S.A. 52:27H-60
et seq.
Previously developed portions of areas:
A structure within, or adjacent to, a water, which intentionally
or coincidentally alters the hydraulic capacity, the flood elevation
resulting from the two-, ten-, or 100-year storm, flood hazard area
limit, and/or floodway limit of the water. Examples of a water control
structure may include a bridge, culvert, dam, embankment, ford (if
above grade), retaining wall, and weir.
The ocean and its estuaries, all springs, streams, wetlands,
and bodies of surface or groundwater, whether natural or artificial,
within the boundaries of the State of New Jersey or subject to its
jurisdiction.
An area that is inundated or saturated by surface water or
groundwater at a frequency and duration sufficient to support, and
that under normal circumstances does support, a prevalence of vegetation
typically adapted for life in saturated soil conditions, commonly
known as "hydrophytic vegetation."
A.
Stormwater management measures for major development shall be designed
to provide erosion control, groundwater recharge, stormwater runoff
quantity control, and stormwater runoff quality treatment as follows:
(1)
The minimum standards for erosion control are those established
under the Soil and Sediment Control Act, N.J.S.A. 4:24-39 et seq.,
and implementing rules at N.J.A.C. 2:90.
(2)
The minimum standards for groundwater recharge, stormwater quality,
and stormwater runoff quantity shall be met by incorporating green
infrastructure.
B.
The standards in this article apply only to new major development
and are intended to minimize the impact of stormwater runoff on water
quality and water quantity in receiving water bodies and maintain
groundwater recharge. The standards do not apply to new major development
to the extent that alternative design and performance standards are
applicable under a regional stormwater management plan or water quality
management plan adopted in accordance with Department rules.
Note: Alternative standards shall provide at least as much protection
from stormwater-related loss of groundwater recharge, stormwater quantity
and water quality impacts of major development projects as would be
provided under the standards in N.J.A.C. 7:8-5.
A.
The development shall incorporate a maintenance plan for the stormwater management measures incorporated into the design of a major development in accordance with § 109-261.
B.
Stormwater management measures shall avoid adverse impacts of concentrated
flow on habitat for threatened and endangered species as documented
in the Department's Landscape Project or Natural Heritage Database
established under N.J.S.A. 13:1B-15.147 through 13:1B-15.150, particularly
Helonias bullata (swamp pink) and/or Clemmys muhlenbergii (bog turtle).
C.
The following linear development projects are exempt from the groundwater recharge, stormwater runoff quality, and stormwater runoff quantity requirements of § 109-254P, Q and R:
(1)
The construction of an underground utility line, provided that
the disturbed areas are revegetated upon completion;
(2)
The construction of an aboveground utility line, provided that
the existing conditions are maintained to the maximum extent practicable;
and
(3)
The construction of a public pedestrian access, such as a sidewalk
or trail with a maximum width of 14 feet, provided that the access
is made of permeable material.
D.
A waiver from strict compliance from the green infrastructure, groundwater recharge, stormwater runoff quality, and stormwater runoff quantity requirements of § 109-254O, P, Q and R may be obtained for the enlargement of an existing public roadway or railroad; or the construction or enlargement of a public pedestrian access, provided that the following conditions are met:
(1)
The applicant demonstrates that there is a public need for the
project that cannot be accomplished by any other means;
(4)
The applicant demonstrates that it does not own or have other rights to areas, including the potential to obtain through condemnation lands not falling under § 109-254D(3) above within the upstream drainage area of the receiving stream, that would provide additional opportunities to mitigate the requirements of § 109-254O, P, Q and R that were not achievable on-site.
E.
Tables 1 through 3 below summarize the ability of stormwater best management practices identified and described in the New Jersey Stormwater Best Management Practices Manual to satisfy the green infrastructure, groundwater recharge, stormwater runoff quality and stormwater runoff quantity standards specified in § 109-254O, P, Q and R. When designed in accordance with the most current version of the New Jersey Stormwater Best Management Practices Manual, the stormwater management measures found at N.J.A.C. 7:8-5.2(f), Tables 5-1, 5-2 and 5-3, and listed below in Tables 1, 2 and 3 are presumed to be capable of providing stormwater controls for the design and performance standards as outlined in the tables below. Upon amendments of the New Jersey Stormwater Best Management Practices to reflect additions or deletions of BMPs meeting these standards, or changes in the presumed performance of BMPs designed in accordance with the New Jersey Stormwater BMP Manual, the Department shall publish in the New Jersey Registers a notice of administrative change revising the applicable table. The most current version of the BMP Manual can be found on the Department's website at https://njstormwater.org/bmp_manual2.htm.
F.
Where the BMP tables in the NJ Stormwater Management Rule are different
due to updates or amendments with the tables in this article, the
BMP tables in the Stormwater Management Rule at N.J.A.C. 7:8-5.2(f)
shall take precedence.
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Table 1
Green Infrastructure BMPs for Groundwater Recharge, Stormwater
Runoff Quality, and/or Stormwater Runoff Quantity
| ||||
|---|---|---|---|---|
|
Best Management Practice
|
Stormwater Runoff Quality TSS Removal Rate
|
Stormwater Runoff Quantity
|
Groundwater Recharge
|
Minimum Separation from Seasonal High-Water Table
(feet)
|
|
Cistern
|
0%
|
Yes
|
No
|
—
|
|
Dry well(a)
|
0%
|
No
|
Yes
|
2
|
|
Grass swale
|
50% or less
|
No
|
No
|
2(e)
1(f)
|
|
Green roof
|
0%
|
Yes
|
No
|
—
|
|
Manufactured treatment device(a)(g)
|
50% or 80%
|
No
|
No
|
Dependent upon the device
|
|
Pervious paving system(a)
|
80%
|
Yes
|
Yes(b)
No(c)
|
2(b)
1(c)
|
|
Small-scale bioretention basin(a)
|
80% or 90%
|
Yes
|
Yes(b)
No(c)
|
2(b)
1(c)
|
|
Small-scale infiltration basin(a)
|
80%
|
Yes
|
Yes
|
2
|
|
Small-scale sand filter
|
80%
|
Yes
|
Yes
|
2
|
|
Vegetative filter strip
|
60% to 80%
|
No
|
No
|
—
|
|
(Notes corresponding to annotations (a) through (g) are found below Table 3.)
|
|
Table 2
Green Infrastructure BMPs for Stormwater Runoff Quantity
(or for Groundwater Recharge and/or Stormwater Runoff Quality
with a Waiver or Variance from N.J.A.C. 7:8-5.3)
| ||||
|---|---|---|---|---|
|
Best Management Practice
|
Stormwater Runoff Quality TSS Removal Rate
|
Stormwater Runoff Quantity
|
Groundwater Recharge
|
Minimum Separation from Seasonal High-Water Table
(feet)
|
|
Bioretention system
|
80% or 90%
|
Yes
|
Yes(b)
No(c)
|
2(b)
No(c)
|
|
Infiltration basin
|
80%
|
Yes
|
Yes
|
2
|
|
Sand filter(b)
|
80%
|
Yes
|
Yes
|
2
|
|
Standard constructed wetland
|
90%
|
Yes
|
No
|
N/A
|
|
Wet pond(d)
|
50% to 90%
|
Yes
|
No
|
N/A
|
|
(Notes corresponding to annotations (b) through (d) are found below Table 3.)
|
|
Table 3
BMPs for Groundwater Recharge, Stormwater Runoff Quality, and/or
Stormwater Runoff Quantity
only with a Waiver or Variance from N.J.A.C. 7:8-5.3
| ||||
|---|---|---|---|---|
|
Best Management Practice
|
Stormwater Runoff Quality TSS Removal Rate
|
Stormwater Runoff Quantity
|
Groundwater Recharge
|
Minimum Separation from Seasonal High-Water Table
(feet)
|
|
Blue roof
|
0%
|
Yes
|
No
|
N/A
|
|
Extended detention basin
|
40% to 60%
|
Yes
|
No
|
1
|
|
Manufactured treatment device(h)
|
50% or 80%
|
No
|
No
|
Dependent upon the device
|
|
Sand filter(c)
|
80%
|
Yes
|
No
|
1
|
|
Subsurface gravel wetland
|
90%
|
No
|
No
|
1
|
|
Wet pond
|
50% to 90%
|
Yes
|
No
|
N/A
|
|
Notes to Tables 1, 2, and 3:
| |
|---|---|
|
(a)
|
Subject to the applicable contributory drainage area limitation specified at § 109-254O(2).
|
|
(b)
|
Designed to infiltrate into the subsoil.
|
|
(c)
|
Designed with underdrains.
|
|
(d)
|
Designed to maintain at least a ten-foot-wide area of native
vegetation along at least 50% of the shoreline and to include a stormwater
runoff retention component designed to capture stormwater runoff for
beneficial reuse, such as irrigation.
|
|
(e)
|
Designed with a slope of less than 2%.
|
|
(f)
|
Designed with a slope of equal to or greater than 2%.
|
|
(g)
|
Manufactured treatment devices that meet the definition of "green infrastructure" at § 109-252.
|
|
(h)
|
Manufactured treatment devices that do not meet the definition of "green infrastructure" at § 109-252.
|
G.
An alternative stormwater management measure, alternative removal rate, and/or alternative method to calculate the removal rate may be used if the design engineer demonstrates the capability of the proposed alternative stormwater management measure and/or the validity of the alternative rate or method to the municipality. A copy of any approved alternative stormwater management measure, alternative removal rate, and/or alternative method to calculate the removal rate shall be provided to the Department in accordance with § 109-257B. Alternative stormwater management measures may be used to satisfy the requirements at § 109-254O only if the measures meet the definition of "green infrastructure" at § 109-252. Alternative stormwater management measures that function in a similar manner to a BMP listed at § 109-254O(2) are subject to the contributory drainage area limitation specified at § 109-254O(2) for that similarly functioning BMP. Alternative stormwater management measures approved in accordance with this subsection that do not function in a similar manner to any BMP listed at § 109-254O(2) shall have a contributory drainage area less than or equal to 2.5 acres, except for alternative stormwater management measures that function similarly to cisterns, grass swales, green roofs, standard constructed wetlands, vegetative filter strips, and wet ponds, which are not subject to a contributory drainage area limitation. Alternative measures that function similarly to standard constructed wetlands or wet ponds shall not be used for compliance with the stormwater runoff quality standard unless a variance in accordance with N.J.A.C. 7:8-4.6 or a waiver from strict compliance in accordance with § 109-254D is granted from § 109-254O.
H.
Whenever the stormwater management design includes one or more BMPs
that will infiltrate stormwater into subsoil, the design engineer
shall assess the hydraulic impact on the groundwater table and design
the site so as to avoid adverse hydraulic impacts. Potential adverse
hydraulic impacts include, but are not limited to, exacerbating a
naturally or seasonally high water table, so as to cause surficial
ponding, flooding of basements, or interference with the proper operation
of subsurface sewage disposal systems or other subsurface structures
within the zone of influence of the groundwater mound, or interference
with the proper functioning of the stormwater management measure itself.
I.
Design standards for stormwater management measures are as follows:
(1)
Stormwater management measures shall be designed to take into
account the existing site conditions, including, but not limited to,
environmentally critical areas; wetlands; flood-prone areas; slopes;
depth to seasonal high-water table; soil type, permeability, and texture;
drainage area and drainage patterns; and the presence of solution-prone
carbonate rocks (limestone);
(2)
Stormwater management measures shall be designed to minimize maintenance, facilitate maintenance and repairs, and ensure proper functioning. Trash racks shall be installed at the intake to the outlet structure, as appropriate, and shall have parallel bars 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 parallel bars at the outlet structure shall be spaced no greater than 1/3 the width of the diameter of the orifice or 1/3 the width of the weir, with a minimum spacing between bars of one inch and a maximum spacing between bars of six inches. In addition, the design of trash racks must comply with the requirements of § 109-259C;
(3)
Stormwater management measures shall be designed, constructed,
and installed 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, 5:21-7.4, and 5:21-7.5
shall be deemed to meet this requirement;
(4)
Stormwater management BMPs shall be designed to meet the minimum safety standards for stormwater management BMPs at § 109-259; and
(5)
The size of the orifice at the intake to the outlet from the
stormwater management BMP shall be a minimum of 2 1/2 inches
in diameter.
J.
Manufactured treatment devices may be used to meet the requirements of this article, provided the pollutant removal rates are verified by the New Jersey Corporation for Advanced Technology and certified by the Department. Manufactured treatment devices that do not meet the definition of "green infrastructure" at § 109-252 may be used only under the circumstances described at § 109-254O(4).
K.
Any application for a new agricultural development that meets the definition of "major development" at § 109-252 shall be submitted to the Soil Conservation District for review and approval in accordance with the requirements at § 109-254O, P, Q and R and any applicable Soil Conservation District guidelines for stormwater runoff quantity and erosion control. For purposes of this subsection, "agricultural development" means land uses normally associated with the production of food, fiber, and livestock for sale. Such uses do not include the development of land for the processing or sale of food and the manufacture of agriculturally related products.
L.
If there is more than one drainage area, the groundwater recharge, stormwater runoff quality, and stormwater runoff quantity standards at § 109-254P, Q and R shall be met in each drainage area, unless the runoff from the drainage areas converge on-site and no adverse environmental impact would occur as a result of compliance with any one or more of the individual standards being determined utilizing a weighted average of the results achieved for that individual standard across the affected drainage areas.
M.
Any stormwater management measure authorized under the municipal stormwater management plan or ordinance shall be reflected in a deed notice recorded in the office of the Hunterdon County Clerk. A form of deed notice shall be submitted to the municipality for approval prior to filing. The deed notice shall contain a description of the stormwater management measure(s) used to meet the green infrastructure, groundwater recharge, stormwater runoff quality, and stormwater runoff quantity standards at § 109-254O, P, Q and R and shall identify the location of the stormwater management measure(s) in NAD 1983 State Plane New Jersey FIPS 2900 US feet or latitude and longitude in decimal degrees. The deed notice shall also reference the maintenance plan required to be recorded upon the deed pursuant to § 109-261B(5). Prior to the commencement of construction, proof that the above required deed notice has been filed shall be submitted to the municipality. Proof that the required information has been recorded on the deed shall be in the form of either a copy of the complete recorded document or a receipt from the Clerk or other proof of recordation provided by the recording office. However, if the initial proof provided to the municipality is not a copy of the complete recorded document, a copy of the complete recorded document shall be provided to the municipality within 180 calendar days of the authorization granted by the municipality.
N.
A stormwater management measure approved under the municipal stormwater management plan or ordinance may be altered or replaced with the approval of the municipality, if the municipality determines that the proposed alteration or replacement meets the design and performance standards pursuant to § 109-254 of this article and provides the same level of stormwater management as the previously approved stormwater management measure that is being altered or replaced. If an alteration or replacement is approved, a revised deed notice shall be submitted to the municipality for approval and subsequently recorded with the office of the Hunterdon County Clerk and shall contain a description and location of the stormwater management measure, as well as reference to the maintenance plan, in accordance with Subsection M above. Prior to the commencement of construction, proof that the above required deed notice has been filed shall be submitted to the municipality in accordance with Subsection M above.
O.
Green infrastructure standards.
(1)
This subsection specifies the types of green infrastructure
BMPs that may be used to satisfy the groundwater recharge, stormwater
runoff quality, and stormwater runoff quantity standards.
(2)
To satisfy the groundwater recharge and stormwater runoff quality standards at § 109-254P and Q, the design engineer shall utilize green infrastructure BMPs identified in Table 1 at § 109-254F and/or an alternative stormwater management measure approved in accordance with § 109-254G. The following green infrastructure BMPs are subject to the following maximum contributory drainage area limitations:
|
Best Management Practice
|
Maximum Contributory Drainage Area
|
|---|---|
|
Dry well
|
1 acre
|
|
Manufactured treatment device
|
2.5 acres
|
|
Pervious pavement systems
|
Area of additional inflow cannot exceed three times the area
occupied by the BMP
|
|
Small-scale bioretention systems
|
2.5 acres
|
|
Small-scale infiltration basin
|
2.5 acres
|
|
Small-scale sand filter
|
2.5 acres
|
(4)
If a variance in accordance with N.J.A.C. 7:8-4.6 or a waiver from strict compliance in accordance with § 109-254D is granted from the requirements of this subsection, then BMPs from Table 1, 2, or 3, and/or an alternative stormwater management measure approved in accordance with § 109-254G may be used to meet the groundwater recharge, stormwater runoff quality, and stormwater runoff quantity standards at § 109-254P, Q and R.
(5)
For separate or combined storm sewer improvement projects, such as sewer separation, undertaken by a government agency or public utility (for example, a sewerage company), the requirements of this subsection shall only apply to areas owned in fee simple by the government agency or utility, and areas within a right-of-way or easement held or controlled by the government agency or utility; the entity shall not be required to obtain additional property or property rights to fully satisfy the requirements of this subsection. Regardless of the amount of area of a separate or combined storm sewer improvement project subject to the green infrastructure requirements of this subsection, each project shall fully comply with the applicable groundwater recharge, stormwater runoff quality control, and stormwater runoff quantity standards at § 109-254P, Q and R, unless the project is granted a waiver from strict compliance in accordance with § 109-254D.
P.
Groundwater recharge standards.
(1)
This subsection contains the minimum design and performance
standards for groundwater recharge as follows.
(2)
The design engineer shall, using the assumptions and factors for stormwater runoff and groundwater recharge calculations at § 109-255, either:
(a)
Demonstrate through hydrologic and hydraulic analysis that the
site and its stormwater management measures maintain 100% of the average
annual preconstruction groundwater recharge volume for the site; or
(b)
Demonstrate through hydrologic and hydraulic analysis that the
increase of stormwater runoff volume from pre-construction to post-construction
for the two-year storm is infiltrated.
(3)
This groundwater recharge requirement does not apply to projects within the urban redevelopment area, or to projects subject to Subsection P(4) below.
(4)
The following types of stormwater shall not be recharged:
(a)
Stormwater from areas of high pollutant loading. High pollutant
loading areas are areas in industrial and commercial developments
where solvents and/or petroleum products are loaded/unloaded, stored,
or applied, areas where pesticides are loaded/unloaded or stored;
areas 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; areas where recharge would
be inconsistent with Department approved remedial action work plan
or landfill closure plan and areas with high risks for spills of toxic
materials, such as gas stations and vehicle maintenance facilities;
and
(b)
Industrial stormwater exposed to source material. "Source material"
means 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
exposed to stormwater.
Q.
Stormwater runoff quality standards.
(1)
This subsection contains the minimum design and performance
standards to control stormwater runoff quality impacts of major development.
Stormwater runoff quality standards are applicable when the major
development results in an increase of 1/4 acre or more of regulated
motor vehicle surface.
(2)
Stormwater management measures shall be designed to reduce the
post-construction load of total suspended solids (TSS) in stormwater
runoff generated from the water quality design storm as follows:
(a)
Eighty-percent TSS removal of the anticipated load, expressed
as an annual average, shall be achieved for the stormwater runoff
from the net increase of motor vehicle surface.
(b)
If the surface is considered regulated motor vehicle surface
because the water quality treatment for an area of motor vehicle surface
that is currently receiving water quality treatment either by vegetation
or soil, by an existing stormwater management measure, or by treatment
at a wastewater treatment plant is to be modified or removed, the
project shall maintain or increase the existing TSS removal of the
anticipated load expressed as an annual average.
(3)
The requirement to reduce TSS does not apply to any stormwater runoff in a discharge regulated under a numeric effluent limitation for TSS imposed under the New Jersey Pollutant Discharge Elimination System (NJPDES) rules, N.J.A.C. 7:14A, or in a discharge specifically exempt under an NJPDES permit from this requirement. Every major development, including any that discharge into a combined sewer system, shall comply with Subsection Q(2) above, unless the major development is itself subject to an NJPDES permit with a numeric effluent limitation for TSS or the NJPDES permit to which the major development is subject exempts the development from a numeric effluent limitation for TSS.
(4)
The water quality design storm is 1.25 inches of rainfall in
two hours. Water quality calculations shall take into account the
distribution of rain from the water quality design storm, as reflected
in Table 4, below. The calculation of the volume of runoff may take
into account the implementation of stormwater management measures.
|
Table 4
Water Quality Design Storm Distribution
| |||||
|---|---|---|---|---|---|
|
Time
(minutes)
|
Cumulative Rainfall
(inches)
|
Time
(minutes)
|
Cumulative Rainfall
(inches)
|
Time
(minutes)
|
Cumulative Rainfall
(inches)
|
|
1
|
0.00166
|
41
|
0.1728
|
81
|
1.0906
|
|
2
|
0.00332
|
42
|
0.1796
|
82
|
1.0972
|
|
3
|
0.00498
|
43
|
0.1864
|
83
|
1.1038
|
|
4
|
0.00664
|
44
|
0.1932
|
84
|
1.1104
|
|
5
|
0.00830
|
45
|
0.2000
|
85
|
1.1170
|
|
6
|
0.00996
|
46
|
0.2117
|
86
|
1.1236
|
|
7
|
0.01162
|
47
|
0.2233
|
87
|
1.1302
|
|
8
|
0.01328
|
48
|
0.2350
|
88
|
1.1368
|
|
9
|
0.01494
|
49
|
0.2466
|
89
|
1.1434
|
|
10
|
0.01660
|
50
|
0.2583
|
90
|
1.1500
|
|
11
|
0.01828
|
51
|
0.2783
|
91
|
1.1550
|
|
12
|
0.01996
|
52
|
0.2983
|
92
|
1.1600
|
|
13
|
0.02164
|
53
|
0.3183
|
93
|
1.1650
|
|
14
|
0.02332
|
54
|
0.3383
|
94
|
1.1700
|
|
15
|
0.02500
|
55
|
0.3583
|
95
|
1.1750
|
|
16
|
0.03000
|
56
|
0.4116
|
96
|
1.1800
|
|
17
|
0.03500
|
57
|
0.4650
|
97
|
1.1850
|
|
18
|
0.04000
|
58
|
0.5183
|
98
|
1.1900
|
|
19
|
0.04500
|
59
|
0.5717
|
99
|
1.1950
|
|
20
|
0.05000
|
60
|
0.6250
|
100
|
1.2000
|
|
21
|
0.05500
|
61
|
0.6783
|
101
|
1.2050
|
|
22
|
0.06000
|
62
|
0.7317
|
102
|
1.2100
|
|
23
|
0.06500
|
63
|
0.7850
|
103
|
1.2150
|
|
24
|
0.07000
|
64
|
0.8384
|
104
|
1.2200
|
|
25
|
0.07500
|
65
|
0.8917
|
105
|
1.2250
|
|
26
|
0.08000
|
66
|
0.9117
|
106
|
1.2267
|
|
27
|
0.08500
|
67
|
0.9317
|
107
|
1.2284
|
|
28
|
0.09000
|
68
|
0.9517
|
108
|
1.2300
|
|
29
|
0.09500
|
69
|
0.9717
|
109
|
1.2317
|
|
30
|
0.10000
|
70
|
0.9917
|
110
|
1.2334
|
|
31
|
0.10660
|
71
|
1.0034
|
111
|
1.2351
|
|
32
|
0.11320
|
72
|
1.0150
|
112
|
1.2367
|
|
33
|
0.11980
|
73
|
1.0267
|
113
|
1.2384
|
|
34
|
0.12640
|
74
|
1.0383
|
114
|
1.2400
|
|
35
|
0.13300
|
75
|
1.0500
|
115
|
1.2417
|
|
36
|
0.13960
|
76
|
1.0568
|
116
|
1.2434
|
|
37
|
0.14620
|
77
|
1.0636
|
117
|
1.2450
|
|
38
|
0.15280
|
78
|
1.0704
|
118
|
1.2467
|
|
39
|
0.15940
|
79
|
1.0772
|
119
|
1.2483
|
|
40
|
0.16600
|
80
|
1.0840
|
120
|
1.2500
|
(5)
If more than one 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 - (AxB)/100
|
|
Where:
| ||
|
R
|
=
|
Total TSS percent load removal from application of both BMPs.
|
|
A
|
=
|
The TSS percent removal rate applicable to the first BMP.
|
|
B
|
=
|
The TSS percent removal rate applicable to the second BMP.
|
(6)
Stormwater management measures shall also be designed to reduce, to the maximum extent feasible, the post-construction nutrient load of the anticipated load from the developed site in stormwater runoff generated from the water quality design storm. In achieving reduction of nutrients to the maximum extent feasible, the design of the site shall include green infrastructure BMPs that optimize nutrient removal while still achieving the performance standards in § 109-254P, Q and R.
(7)
In accordance with the definition of "FW1" at N.J.A.C. 7:9B-1.4,
stormwater management measures shall be designed to prevent any increase
in stormwater runoff to waters classified as FW1.
(8)
The Flood Hazard Area Control Act Rules at N.J.A.C. 7:13-4.1(c)1
establish 300-foot riparian zones along Category One waters, as designated
in the Surface Water Quality Standards at N.J.A.C. 7:9B, and certain
upstream tributaries to Category One waters. A person shall not undertake
a major development that is located within or discharges into a 300-foot
riparian zone without prior authorization from the Department under
N.J.A.C. 7:13.
(9)
Pursuant to the Flood Hazard Area Control Act Rules at N.J.A.C.
7:13-11.2(j)3i, runoff from the water quality design storm that is
discharged within a 300-foot riparian zone shall be treated in accordance
with this subsection to reduce the post-construction load of total
suspended solids by 95% of the anticipated load from the developed
site, expressed as an annual average.
(10)
This stormwater runoff quality standards do not apply to the
construction of one individual single-family dwelling, provided that
it is not part of a larger development or subdivision that has received
preliminary or final site plan approval prior to December 3, 2018,
and that the motor vehicle surfaces are made of permeable material(s)
such as gravel, dirt, and/or shells.
R.
Stormwater runoff quantity standards.
(1)
This subsection contains the minimum design and performance
standards to control stormwater runoff quantity impacts of major development.
(2)
In order to control stormwater runoff quantity impacts, the design engineer shall, using the assumptions and factors for stormwater runoff calculations at § 109-255, complete one of the following:
(a)
Demonstrate through hydrologic and hydraulic analysis that,
for stormwater leaving the site, post-construction runoff hydrographs
for the two-, ten-, and 100-year storm events do not exceed, at any
point in time, the pre-construction runoff hydrographs for the same
storm events;
(b)
Demonstrate through hydrologic and hydraulic analysis that there
is no increase, as compared to the pre-construction condition, in
the peak runoff rates of stormwater leaving the site for the two-,
ten- and 100-year storm events and that the increased volume or change
in timing of stormwater runoff will not increase flood damage at or
downstream of the site. This analysis shall include the analysis of
impacts of existing land uses and projected land uses assuming full
development under existing zoning and land use ordinances in the drainage
area;
(c)
Design stormwater management measures so that the post-construction
peak runoff rates for the two-, ten- and 100-year storm events are
50%, 75% and 80%, respectively, of the pre-construction peak runoff
rates. The percentages apply only to the post-construction stormwater
runoff that is attributable to the portion of the site on which the
proposed development or project is to be constructed; or
(d)
In tidal flood hazard areas, stormwater runoff quantity analysis in accordance with Subsection R(2)(a), (b) and (c) above is required unless the design engineer demonstrates through hydrologic and hydraulic analysis that the increased volume, change in timing, or increased rate of the stormwater runoff, or any combination of the three, will not result in additional flood damage below the point of discharge of the major development. No analysis is required if the stormwater is discharged directly into any ocean, bay, inlet, or the reach of any watercourse between its confluence with an ocean, bay, or inlet and downstream of the first water control structure.
(3)
The stormwater runoff quantity standards shall be applied at
the site's boundary to each abutting lot, roadway, watercourse, or
receiving storm sewer system.
A.
Stormwater runoff shall be calculated in accordance with the following:
(1)
The design engineer shall calculate runoff using one of the
following methods:
(a)
The USDA Natural Resources Conservation Service (NRCS) methodology,
including the NRCS Runoff Equation and Dimensionless Unit Hydrograph,
as described in Chapters 7, 9, 10, 15 and 16, Part 630, Hydrology
National Engineering Handbook, incorporated herein by reference as
amended and supplemented. This methodology is additionally described
in Technical Release 55 - Urban Hydrology for Small Watersheds (TR-55),
dated June 1986, incorporated herein by reference as amended and supplemented.
Information regarding the methodology is available from the Natural
Resources Conservation Service website at https://www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb1044171.pdf,
or at United States Department of Agriculture Natural Resources Conservation
Service, 220 Davison Avenue, Somerset, New Jersey 08873; or
(b)
The Rational Method for peak flow and the Modified Rational
Method for hydrograph computations. The Rational and Modified Rational
methods are described in "Appendix A-9, Modified Rational Method,"
in the Standards for Soil Erosion and Sediment Control in New Jersey,
January 2014. This document is available from the State Soil Conservation
Committee or any of the soil conservation districts listed at N.J.A.C.
2:90-1.3(a)3. The location, address, and telephone number for each
soil conservation district is available from the State Soil Conservation
Committee, PO Box 330, Trenton, New Jersey 08625. The document is
also available at http://www.nj.gov/agriculture/divisions/anr/pdf/2014NJSoilErosionControlStandards
Complete.pdf.
(2)
For the purpose of calculating runoff coefficients and groundwater recharge, there is a presumption that the pre-construction condition of a site or portion thereof is a wooded land use with good hydrologic condition. The term "runoff coefficient" applies to both the NRCS methodology above at § 109-255A(1)(a) and the Rational and Modified Rational methods at § 109-255A(1)(b). A runoff coefficient or a groundwater recharge land cover for an existing condition may be used on all or a portion of the site if the design engineer verifies that the hydrologic condition has existed on the site or portion of the site for at least five years without interruption prior to the time of application. 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. In addition, there is the presumption that the site is in good hydrologic condition (if the land use type is pasture, lawn, or park), with good cover (if the land use type is woods), or with good hydrologic condition and conservation treatment (if the land use type is cultivation).
(3)
In computing pre-construction stormwater runoff, the design
engineer shall account for all significant land features and structures,
such as ponds, wetlands, depressions, hedgerows, or culverts, that
may reduce pre-construction stormwater runoff rates and volumes.
(4)
In computing stormwater runoff from all design storms, the design
engineer shall consider the relative stormwater runoff rates and/or
volumes of pervious and impervious surfaces separately to accurately
compute the rates and volume of stormwater runoff from the site. To
calculate runoff from unconnected impervious cover, urban impervious
area modifications as described in the NRCS Technical Release 55 -
Urban Hydrology for Small Watersheds or other methods may be employed.
(5)
If the invert of the outlet structure of a stormwater management
measure is below the flood hazard design flood elevation as defined
at N.J.A.C. 7:13, the design engineer shall take into account the
effects of tailwater in the design of structural stormwater management
measures.
B.
Groundwater recharge may be calculated in accordance with the following:
(1)
The New Jersey Geological Survey Report GSR-32, A Method for
Evaluating Groundwater- Recharge Areas in New Jersey, incorporated
herein by reference as amended and supplemented. Information regarding
the methodology is available from the New Jersey Stormwater Best Management
Practices Manual; at the New Jersey Geological Survey website at https://www.nj.gov/dep/njgs/pricelst/gsreport/gsr32.pdf;
or at New Jersey Geological and Water Survey, 29 Arctic Parkway, PO
Box 420 Mail Code 29-01, Trenton, New Jersey 08625-0420.
A.
Structural management measures.
(1)
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 types; permeability and texture; drainage area
and drainage patterns; and the presence of specific geological constraints.
(2)
Structural stormwater management measures shall be designed to facilitate maintenance and repairs, and ensure proper functioning. Trash racks shall be installed at the intake to the outlet structure as appropriate, and shall have parallel bars 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 parallel bars at the outlet structure shall be spaced no greater than 1/3 the width of the diameter of the orifice or 1/3 the width of the weir, with a minimum spacing between bars of one inch and a maximum spacing between bars of six inches. In addition, the design of trash racks must comply with the requirements of § 109-259C.
(3)
Structural stormwater management measures shall be designed,
constructed, and installed to be strong, durable, and corrosion resistant.
These measures shall also be consistent with West Amwell's rural community
character, especially by providing suitable wildlife habitat. Measures
that are consistent with the relevant portions of the residential
site improvement standards at N.J.A.C. 5:21-7.3, 5:21-7.4, and 5:21-7.5
shall be deemed to meet this requirement. The measures are to be sequenced
in the site development process so that erosion control standards
are met and so the measure is not compromised or impaired by construction
runoff.
(4)
At the intake to the outlet from the stormwater management basin,
the orifice size shall be a minimum of 2 1/2 inches in diameter.
(5)
Stormwater management basins shall be designed to meet the minimum safety standards for stormwater management basins at § 109-258.
(6)
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.
Guidelines for management measures. Stormwater management measure guidelines are available in the New Jersey Stormwater Best Management Practices Manual and other documents as described in § 109-257. Other stormwater management measures may be utilized, provided the design engineer demonstrates to the satisfaction of the review agency that the proposed measure and its design will accomplish the required water quantity, groundwater recharge and water quality design and performance standards established by § 109-254 of this chapter.
A.
Technical guidance for stormwater management measures can be found
in the documents listed below, which are available to download from
the Department's website at http://www.nj.gov/dep/stormwater/bmp_manual2.htm.
(1)
Guidelines for stormwater management measures are contained
in the New Jersey Stormwater Best Management Practices Manual, as
amended and supplemented. Information is provided on stormwater management
measures such as, but not limited to, those listed in Tables 1, 2,
and 3.
(2)
Additional maintenance guidance is available on the Department's
website at https://www.njstormwater.org/maintenance_guidance.htm.
B.
Submissions required for review by the Department should be mailed
to the Division of Water Quality, New Jersey Department of Environmental
Protection, Mail Code 401-02B, PO Box 420, Trenton, New Jersey 08625-0420.
A.
Site design features identified under § 109-254F above, or alternative designs in accordance with § 109-254G above, 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. For exemptions to this standard see § 109-258A(2) below.
(1)
Design engineers shall use one 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:
(a)
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; or
(b)
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 drains. Examples of ground surfaces
include surfaces of roads (including bridges), driveways, parking
areas, bikeways, plazas, sidewalks, lawns, fields, open channels,
and stormwater system floors used to collect stormwater from the surface
into a storm drain or surface water body.
(c)
For curb-opening inlets, including curb-opening inlets in combination
inlets, 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.
(2)
The standard in Subsection A(1) above does not apply:
(a)
Where each individual clear space in the curb opening in existing
curb-opening inlet does not have an area of more than nine square
inches;
(b)
Where the municipality agrees that the standards would cause
inadequate hydraulic performance that could not practicably be overcome
by using additional or larger storm drain inlets;
(c)
Where flows from the water quality design storm as specified
in N.J.A.C. 7:8 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:
a rectangular space 4 5/8 inches long and 1.5 inches wide (this
option does not apply for outfall netting facilities); or a bar screen
having a bar spacing of 0.5 inch. Note that these exemptions do not
authorize any infringement of requirements in the Residential Site
Improvement Standards for bicycle-safe grates in new residential development
[N.J.A.C. 5:21-4.18(b)2 and 5:21-7.4(b)(1)];
(d)
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 N.J.A.C. 7:8; or
(e)
Where the New Jersey Department of Environmental Protection
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.
A.
This section sets forth requirements to protect public safety through
the proper design and operation of stormwater management BMPs. This
section applies to any new stormwater management BMP.
B.
The provisions of this section are not intended to preempt more stringent municipal or county safety requirements for new or existing stormwater management BMPs, Municipal and county stormwater management plans and ordinances may, pursuant to their authority, require existing stormwater management BMPs to be retrofitted to meet one or more of the safety standards in § 109-259C(1), (2), and (3) for trash racks, overflow grates, and escape provisions at outlet structures.
C.
Requirements for trash racks, overflow grates and escape provisions.
(1)
A trash rack is a device designed to catch trash and debris
and prevent the clogging of outlet structures. Trash racks shall be
installed at the intake to the outlet from the stormwater management
BMP to ensure proper functioning of the BMP outlets in accordance
with the following:
(a)
The trash rack shall have parallel bars, with no greater than
six-inch spacing between the bars;
(b)
The trash rack shall be designed so as not to adversely affect
the hydraulic performance of the outlet pipe or structure;
(c)
The average velocity of flow through a clean trash rack is not
to exceed 2.5 feet per second under the full range of stage and discharge.
Velocity is to be computed on the basis of the net area of opening
through the rack; and
(d)
The trash rack shall be constructed of rigid, durable, and corrosion-resistant
material and designed to withstand a perpendicular live loading of
300 pounds per square foot.
(2)
An overflow grate is designed to prevent obstruction of the
overflow 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 less 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.
(3)
Stormwater management BMPs shall include escape provisions as
follows:
(a)
If a stormwater management BMP has an outlet structure, escape provisions shall be incorporated in or on the structure. Escape provisions include the installation of permanent ladders, steps, rungs, or other features that provide easily accessible means of egress from stormwater management BMPs. With the prior approval of the municipality pursuant to Subsection D, a freestanding outlet structure may be exempted from this requirement;
(b)
Safety ledges shall be constructed on the slopes of all new stormwater management BMPs having a permanent pool of water deeper than 2 1/2 feet. 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 Subsection E for an illustration of safety ledges in a stormwater management BMP; and
(c)
In new stormwater management BMPs, the maximum interior slope
for an earthen dam, embankment, or berm shall not be steeper than
three horizontal to one vertical.
D.
Variance or exemption from safety standard. A variance or exemption
from the safety standards for stormwater management BMPs may be granted
only upon a written finding by the municipality that the variance
or exemption will not constitute a threat to public safety.
E.
Safety ledge illustration.
|
Elevation View - Basin Safety Ledge Configuration
 |
A.
Submission of site development stormwater plan.
(1)
Whenever an applicant seeks municipal approval of a development subject to this article, the applicant shall submit all of the required components of the checklist for the site development stormwater plan at § 109-260C below as part of the submission of the application for approval.
(2)
The applicant shall demonstrate that the project meets the standards
set forth in this article.
B.
Site development stormwater plan approval. The applicant's site development
project shall be reviewed as a part of the review process by the municipal
board or official from which municipal approval is sought. That municipal
board or official shall consult the municipality's review engineer
to determine if all of the checklist requirements have been satisfied
and to determine if the project meets the standards set forth in this
article.
C.
Submission of site development stormwater plan and checklist requirements.
The following information shall be required:
(1)
Topographic and existing site conditions base map. The reviewing
engineer may require upstream tributary drainage system information
as necessary. It is recommended that the topographic base map of the
site be submitted which extends a minimum of 200 feet beyond the limits
of the proposed development, at a scale of one inch equals 200 feet
or greater, showing two-foot contour intervals. The map as appropriate
may indicate the following: existing surface water drainage, shorelines,
steep slopes, soils, erodible soils, perennial or intermittent streams
that drain into or upstream of the Category One waters, wetlands and
floodplains along with their appropriate buffer strips, marshlands
and other wetlands, pervious or vegetative surfaces, existing man-made
structures, roads, bearing and distances of property lines, and significant
natural and man-made features not otherwise shown.
(a)
Hydrology.
[1]
Perennial or intermittent streams as shown on the USGS 7.5 Minute
Quadrangle Maps and as indicated in the Soil Survey of Hunterdon County,
New Jersey.
[2]
Special water resource protection areas along all waters designated
Category One at N.J.A.C. 7:9B and perennial or intermittent streams
that drain into or upstream of the Category One waters as shown on
the USGS Quadrangle Maps or in the County Soil Surveys.
[3]
Wetlands, transition areas, NJDEP linear non-tidal wetlands,
marshlands and NJDEP Letter of Interpretation findings.
[4]
FEMA flood data, 100-year floodplains and floodways and New
Jersey flood hazard area.
[5]
Geometry of on-site drainage areas.
(b)
Boundaries and buffers.
[1]
Appropriate buffers to streams, rivers, wetlands, marshlands,
ponds, lakes and other water bodies as specified in pertinent ordinances,
rules, regulations, statutes or other provisions of law imposed by
local, county, state or federal agencies.
[2]
Existing and proposed bearing and distances of property lines.
[3]
Existing and proposed conservation, maintenance, construction,
reconstruction, sight, utility, drainage and right-of-way easements
and dedications.
(d)
Geology and soils (as indicated in the Soil Survey of Hunterdon
County).
[1]
Steep slopes, slopes of 10% or greater.
[2]
Soil types.
[3]
Highly erodible soils, with an erodibility factor (K) of 0.40
or less.
[4]
Drainage class and recharge potential.
[5]
Colloidal soils.
[6]
Depth to bedrock.
[7]
Seasonal high-water table.
[8]
Soils subject to dynamic compaction and compacted soils.
[9]
Soil pH.
[10]
Shrink swell potential.
[11]
Deeply fractured bedrock.
[12]
Hardpans and plough pans.
(e)
Existing man-made structures and activities.
[1]
Existing buildings and significant permanent man-made features.
[2]
Roads by classification, parking areas and other impervious
surfaces.
[3]
Bridges and culverts.
[4]
Utilities, subsurface and above ground.
[5]
Mining/quarry operations and blasting areas.
[6]
Acid or other hazardous runoff.
[7]
Areas of fill and buried debris.
[8]
Wellheads and associated groundwater withdrawal pipes, discharges
and BMPs of existing stormwater utilities.
[9]
Groundwater mounding.
[10]
Septic systems and wells of adjacent lots.
[11]
Sanitary lines.
[12]
Previous land use (agricultural, industrial, commercial).
(2)
Environmental site analysis.
(a)
A written and graphic description of the natural and man-made
features of the site and its surroundings shall be prepared for the
Planning Board by the applicant at the applicant's expense and shall
accompany all preliminary site plan and subdivision plats. The environmental
impact statement, at a minimum, shall include the following:
[Amended 12-27-2023 by Ord. No. 13-2023]
[1]
Aquatic ecology, including water conditions and aquatic populations.
[2]
Surface and subsurface hydrogeology.
[3]
Potable water supply.
[4]
Wetlands, woodlands, slopes, geology.
[5]
Soils and soil conditions, including capabilities and limitations.
[6]
Topography.
[7]
Vegetation, forested areas, suitable animal habitats.
[8]
Areas identified as suitable habitats for rare, threatened or
endangered species.
[9]
Waterways.
[10]
Existing land use.
[11]
Any particular past or present use that involved
the disposal of solid waste or toxic or hazardous materials, such
as a dump, disposal site, or manufacturing operation, and how this
past or present use relates to the site's aesthetics and history.
(b)
Particular attention should be given to unique, unusual, or
environmentally critical areas and to those that provide particular
opportunities or constraints for development. Water quality shall
be described with reference to standards of the Department and soils
shall be described with reference to Soil Conservation Service categories
and characteristics.
(3)
Project description and site plans. 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. This plan shall provide a demonstration of how the goals and standards of §§ 109-253 through 109-255 are being met. The focus of this plan shall be to describe how the site is being developed to meet the objective of controlling groundwater recharge, stormwater quality and stormwater quantity problems at the source by land management and source controls whenever possible.
(5)
Stormwater management facilities map. The following information,
illustrated on a map of the same scale as the topographic base map,
shall be included:
(a)
Total area to be disturbed, paved or built upon, proposed surface
contours, land area to be occupied by the stormwater management facilities
and the type of vegetation thereon, and details of the proposed plan
to control and dispose of stormwater.
(b)
Details of all stormwater management facility designs, during
and after construction, including discharge provisions, discharge
capacity for each outlet at different levels of detention and emergency
spillway provisions with maximum discharge capacity of each spillway.
(6)
Calculations.
(a)
Comprehensive hydrologic and hydraulic design calculations for the pre-development and post-development conditions for the design storms specified in § 109-254 of this article.
(b)
When the proposed stormwater management control measures depend
on the hydrologic properties of soils or require certain separation
from the seasonal high-water table, then a soils report shall be submitted.
The soils report shall be based on on-site boring logs or soil pit
profiles. The number and location of required soil borings or soil
pits shall be determined based on what is needed to determine the
suitability and distribution of soils present at the location of the
control measure.
(7)
Maintenance and repair plan. The design and planning of the stormwater management facility shall meet the maintenance requirements of § 109-261.
(8)
Waiver from submission requirements. The municipal official or board reviewing an application under this article may, in consultation with the municipality's review engineer, waive submission of any of the requirements in § 109-260C(1) through (6) of this article when it can be demonstrated that the information requested is impossible to obtain or it would create a hardship on the applicant to obtain and its absence will not materially affect the review process.
B.
General maintenance.
(1)
The design engineer shall prepare a maintenance plan for the
stormwater management measures incorporated into the design of a major
development. This plan shall be separate from all other documents,
in a format suitable for recording in the County Clerk's office, and
designed for ongoing use by the site owners or operators in performing
and documenting maintenance and repair, and by the municipality in
ensuring implementation of the maintenance plan. The maintenance plan
shall be updated and provided to the municipality post-development
to include an evaluation based on the specifications of the initial
maintenance plan and as-built conditions subject to approval by the
review agency.
(2)
The maintenance plan shall contain specific preventative maintenance
tasks and schedules; cost estimates, including estimated cost of sediment,
debris, or trash removal; and the name, address, and telephone number
of the person or persons responsible for preventative and corrective
maintenance (including replacement). The plan shall contain information
on BMP location, design, ownership, maintenance tasks and frequencies,
and other details as specified in Chapter 8 of the NJ BMP Manual,
as well as the tasks specific to the type of BMP, as described in
the applicable chapter containing design specifics.
(3)
If the maintenance plan identifies a person other than the property
owner (for example, a developer, a public agency or homeowners' association)
as having the responsibility for maintenance, the plan shall include
documentation of such person's or entity's agreement to assume this
responsibility, or of the owner's obligation to dedicate a stormwater
management facility to such person under an applicable ordinance or
regulation.
(4)
Responsibility for 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. The individual property
owner may be assigned incidental tasks, such as weeding of a green
infrastructure BMP, provided the individual agrees to assume these
tasks; however, the individual cannot be legally responsible for all
of the maintenance required.
(5)
If the party responsible for maintenance identified under § 109-261B(3) above is not a public agency, the maintenance plan and any future revisions based on § 109-261B(7) below shall be recorded upon the deed of record for each property on which the maintenance described in the maintenance plan must be undertaken.
(6)
Preventative and corrective maintenance shall be performed to
maintain the functional parameters (storage volume, infiltration rates,
inflow/outflow capacity, etc.) of the stormwater management measure,
including, but not limited to, repairs or replacement to the structure;
removal of sediment, debris, or trash; restoration of eroded areas;
snow and ice removal; fence repair or replacement; restoration of
vegetation; and repair or replacement of nonvegetated linings.
(7)
The party responsible for maintenance identified under § 109-261B(3) above shall perform all of the following requirements:
(a)
Maintain a detailed log of all preventative and corrective maintenance
for the structural stormwater management measures incorporated into
the design of the development, including a record of all inspections
and copies of all maintenance-related work orders;
(b)
Evaluate the effectiveness of the maintenance plan at least
once per year and adjust the plan and the deed as needed; and
(c)
Retain and make available, upon request by any public entity with administrative, health, environmental, or safety authority over the site, the maintenance plan and the documentation required by § 109-261B(6) and (7) above.
(8)
The requirements of § 109-261B(3) and (4) do not apply to stormwater management facilities that are dedicated to and accepted by the municipality or another governmental agency, subject to all applicable municipal stormwater general permit conditions, as issued by the Department. Additional guidance can be found at https://www.njstormwater.org/maintenance_guidance.htm.
(9)
In the event that the stormwater management facility becomes
a danger to public safety or public health, or if it is in need of
maintenance or repair, the municipality shall so notify the responsible
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 his designee.
The municipality, in its discretion, may extend the time allowed for
effecting maintenance and repair for good cause. If the responsible
person fails or refuses to perform such maintenance and repair, the
municipality or county may immediately proceed to do so and shall
bill the cost thereof to the responsible person. Nonpayment of such
bill may result in a lien on the property.
C.
Maintenance guarantee. Nothing in this subsection shall preclude
the municipality in which the major development is located from requiring
the posting of a performance or maintenance guarantee in accordance
with N.J.S.A. 40:55D-53.
The Zoning Officer is authorized to make site inspections and
take such actions that are necessary in order to enforce the provisions
of this article. A prompt investigation shall be made by the appropriate
personnel of West Amwell of any person or entity believed to be in
violation hereof. If, upon inspection, a condition which is in violation
of this article is discovered, a civil action may be filed in the
special part of the Superior Court, or in the Superior Court, if the
primary relief sought is injunctive or if penalties may exceed the
jurisdictional limit of the special civil part, by the filing and
serving of appropriate process. Nothing in this article shall be construed
to preclude the right of West Amwell pursuant to N.J.S.A. 26:3A2-25
to initiate legal proceedings hereunder in municipal court. The violation
of any section or subsection of this article shall constitute a separate
and distinct offense independent of the violation of any other section
or subsection, or of any order issued pursuant to this article. Each
day a violation continues shall be considered a separate offense.
Any person, firm or corporation violating any provisions of
this article shall, upon conviction, be subject to a fine of not less
than $100 nor more than $2,000, a term of imprisonment not exceeding
90 days, or by a period of community service not exceeding 90 days,
or any combination thereof for each violation, and in addition shall
pay all costs and expenses involved in the case. Each day that any
such violation continues after the expiration of an abatement notice
or after initial construction shall be deemed a distinct and separate
offense. Nothing herein contained shall prevent the Township from
taking such other lawful action as is necessary to prevent or remedy
any violation.
Each section, subsection, sentence, clause and phrase of this
article is declared to be an independent section, subsection, sentence,
clause and phrase, and the finding or holding of any such portion
of this article to be unconstitutional, void, or ineffective for any
cause, or reason, shall not affect any other portion of this article.
This article shall be in full force and effect from and after
its adoption and any publication as required by law.
