[HISTORY: Adopted by the Mayor and Council of the Borough
of Wallington 4-19-2007 by Ord. No. 2007-03[1]. Amendments noted where applicable.]
GENERAL REFERENCES
Land use procedures — See Ch. 75.
Flood damage prevention — See Ch. 220.
Storm sewer protection — See Ch. 317.
Subdivision and land development — see Ch. 330.
Zoning — See Ch. 365.
[1]
Editor's Note: The introductory clause of this ordinance
provided as follows:
"The Borough of Wallington hereby amends their Land Development
Ordinance to include the following Stormwater Control Ordinance. The
following shall govern for instances where this chapter conflicts
with the existing Land Development Ordinance."
A.
Policy statement. Flood control, groundwater recharge and pollutant
reduction through nonstructural or low-impact techniques shall be
explored before relying on structural BMPs (best management practices).
Structural BMPs should be integrated with nonstructural stormwater
management strategies and proper maintenance plans. Nonstructural
strategies include both environmentally sensitive site design and
source controls that prevent pollutants from being placed on the site
or from being exposed to stormwater. Source control plans 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. It is the purpose of this chapter to establish minimum stormwater management requirements and controls for "major development," as defined in § 320-2 and to reduce the amount of nonpoint source pollution entering surface water and groundwater. Unmitigated stormwaters from areas altered by development may pose public health and safety threats. This chapter establishes the administrative mechanisms necessary for the Borough of Wallington to ensure proper stormwater management. This chapter is written to work in conjunction with current state and federal regulations. This chapter guides development in a manner that is proactive and minimizes harmful impacts to natural resources. Specifically, this chapter shall:
(1)
Reduce artificially induced flood damage to public health, life and
property;
(2)
Minimize increased stormwater runoff rates and volumes;
(3)
Minimize the deterioration of existing structures that would result
from increased rates of stormwater runoff;
(4)
Induce water recharge into the ground wherever suitable infiltration,
soil permeability and favorable geological conditions exist;
(5)
Prevent an increase in nonpoint source pollution
(6)
Maintain the integrity and stability of stream channels and buffers
for their ecological functions, as well as for drainage, the conveyance
of floodwater, and other purposes;
(7)
Control and minimize soil erosion and the transport of sediment;
(8)
Minimize public safety hazards at any stormwater detention facility
constructed pursuant to subdivision or site plan approval;
(9)
Maintain adequate base flow and natural flow regimes in all streams
and other surface water bodies to protect the aquatic ecosystem;
(10)
Protect all surface water resources from degradation; and
(11)
Protect groundwater resources from degradation and diminution.
C.
D.
Compatibility with other permit and ordinance requirements. Development
approvals issued for subdivisions and site plans pursuant to this
chapter 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 chapter shall be held to be the minimum requirements for the
promotion of the public health, safety and general welfare. This chapter
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 chapter 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.
Unless specifically defined below, words or phrases used in
this chapter shall be interpreted so as to give them the meaning they
have in common usage and to give this chapter its most reasonable
application. 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.
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 manufacturing of
agriculturally related products.
Structural device, measure, facility or activity that helps
to achieve stormwater management control objectives at a designated
site.
Those areas within boundaries accepted by the Department
pursuant to N.J.A.C. 7:8E-5B.
The geographic depiction of the boundaries for Coastal Planning
Areas, CAFRA Centers, CAFRA Cores and CAFRA Nodes pursuant to N.J.A.C.
7:7E-5B.3.
Waters of the state, including unnamed waterways that appear
on Soil Survey and USGS Topographic Quadrangle within the same HUC
14 watershed, 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).
The increase in soil bulk density by subjecting soil to greater
than normal loading.
A pedestrian-oriented area of commercial and civic uses serving
the surrounding municipality, generally including housing and access
to public transportation.
An agency designated by the County Board of Chosen Freeholders
to review municipal stormwater management plans and implementing ordinance(s).
The county review agency may either be:
The New Jersey Department of Environmental Protection.
A state development and redevelopment plan center, as designated
by the State Planning Commission, such as urban, regional, town, village
or hamlet.
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.
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 by any person,
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
lands, "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.
Any activity including the clearing, excavating, storing,
grading, filling or transportation of soil or any other activity that
causes soil to be exposed to the danger of erosion.
A geographic area within which stormwater, sediments or dissolved
materials drain to a particular receiving water body or to a particular
point along a receiving water body.
A neighborhood designated by the Urban Coordinating Council
"in consultation and conjunction with" the New Jersey Redevelopment
Authority pursuant to N.J.S.A. 55:19-69.
An area or feature which is of significant environmental
value, including but not limited to stream corridors; natural heritage
priority sites; habitat of endangered or threatened 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 Non-Game
Species Program.
The detachment and movement of soil or rock fragments by
water, wind, ice or gravity.
The permanent installation of ladders, steps, rungs or other
features that provide easily accessible means of egress from stormwater
management basins.
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.
A surface that has been covered with a layer of material
so that it is highly resistant to infiltration by water.
The process by which water seeps into the soil from precipitation
to a level below the normal root soil of plant species.
Any development that provides for ultimately disturbing one
or more acres of land or creates more than 1/4 acre of new impervious
coverage. "Disturbance" for the purpose of this rule is the placement
of impervious surface or exposure and/or movement of soil or bedrock
or clearing, cutting or removing of vegetation.
An action by an applicant providing compensation or offset
actions for on-site stormwater management requirements, where the
applicant has demonstrated the inability or impracticality of strict
compliance with the stormwater management requirements set forth in
N.J.A.C. 7:8 in an adopted regional stormwater management plan or
in this chapter and has received a waiver from strict compliance from
the Borough of Wallington. Mitigation for the purposes of this chapter
includes both the mitigation plan detailing how the project's
failure to strictly comply will be compensated and the implementation
of the approved mitigation plan.
Any city, borough, town, township or village.
An area designated by the State Planning Commission concentrating
facilities and activities which are not organized in a compact form.
Techniques that control or reduce stormwater runoff in the
absence of stormwater structures (e.g., basins and pipe conveyances),
such as minimizing site disturbance; preserving important site features
including, but not limited to, natural vegetation; reducing and disconnecting
impervious cover; minimizing slopes; utilizing native vegetation;
minimizing turf grass lawns; increasing time of concentration; and
maintaining and enhancing natural drainage features and characteristics.
A chemical element or compound, such as nitrogen or phosphorus,
which is essential to and promotes the development of organisms.
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, the Borough of Wallington or political subdivision of
this state subject to municipal jurisdiction pursuant to the Municipal
Land Use Law, N.J.S.A. 40:55D-1 et seq.
A document approved at the site design phase that outlines
the measures and practices used to control stormwater runoff at the
site.
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 man-made or man-induced alteration of the chemical, physical,
biological and radiological integrity of water to the extent that
the pollutant concentration or level violates either the Ground Water
Quality Standards (N.J.A.C. 7:9C) or the Surface Water Quality Standards
(N.J.A.C. 7:9B) of New Jersey.
The amount of water from precipitation that infiltrates into
the ground and is not evapotranspired.
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, water 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.
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 basin may either
be normally dry (that is, a detention basin or infiltration basin),
retain water in a permanent pool (a retention basin), or be planted
mainly with wetland vegetation (most constructed stormwater wetlands).
Any structural or nonstructural strategy, practice, technology,
process, program or other method intended to control or reduce stormwater
runoff and associated pollutants or to induce or control the infiltration
or groundwater recharge of stormwater or to eliminate illicit or illegal
non-stormwater discharges into stormwater conveyances.
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. A
stream buffer may encompass wetlands, may be contained within a floodplain
or floodway or may extend beyond a wetland, floodplain or floodway
boundary.
A stormwater management measure that involves control of
concentrated stormwater runoff or filtration, such as stormwater basins,
piped conveyance systems and manufactured stormwater devices, and
can include various types of basins, filters, surfaces and devices
located on individual lots in a residential development or throughout
a commercial, industrial or institutional development site in areas
not typically suited for larger, centralized structural facilities.
Endangered species are those whose prospects for survival
in New Jersey are in immediate danger because of a loss or change
in habitat, over-exploitation, predation, competition, disease, disturbance
or contamination. Assistance is needed to prevent future extinction
in New Jersey. Threatened species are those who may become endangered
if conditions surrounding them begin to or continue to deteriorate.
Habitats of endangered or threatened species are those identified
by the Department's Landscape Project as approved by the Department's
Endangered and Non-Game Species Program.
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 known as "buffer area."
A flood hazard area, which may be influenced by stormwater
runoff from inland areas, but which is primarily caused by the Atlantic
Ocean.
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, including but not
limited to the following:
The ocean and its estuaries, all springs, streams, wetlands
and bodies of surface water 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.
Design and performance standards for stormwater management measures:
(1)
Stormwater management measures for major development shall be developed to meet the erosion control, groundwater recharge, stormwater runoff quantity and stormwater runoff quality standards in § 320-4. To the maximum extent practicable, these standards shall be met by incorporating nonstructural stormwater management strategies into the design. If these strategies alone are not sufficient to meet these standards, structural stormwater management measures necessary to meet these standards shall be incorporated into the design along with the nonstructural strategies.
(2)
The standards in this chapter 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.
A.
Maintenance plan. The development shall incorporate a maintenance plan for the stormwater management measures incorporated into the design of a major development in accordance with § 320-10.
B.
Threatened and endangered species. Stormwater management measures
shall be implemented in order to avoid adverse impacts of concentrated
flow on habitat(s) 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.
C.
Exemptions. The following linear development projects are exempt from the groundwater recharge, stormwater runoff quantity and stormwater runoff quality requirements of Subsections F and G of this section:
(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, such as, but not limited to, wood chips,
unpacked gravel and porous pavement.
D.
Waiver from strict compliance:
(1)
A waiver from strict compliance from the groundwater recharge, stormwater runoff quantity and stormwater runoff quality requirements of Subsections F and G of this section 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:
(a)
The applicant demonstrates that there is a public need for the
project that cannot be accomplished by any other means;
(d)
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 Subsection D(1)(c) above within the upstream drainage area of the receiving stream, that would provide additional opportunities to mitigate the requirements of Subsections F and G of this section that were not achievable on site.
(2)
A waiver from strict compliance from such projects can only be obtained
if the applicant agrees to undertake a suitable mitigation measure
identified in the mitigation section of the Borough of Wallington's
Stormwater Management Plan. In such cases, the applicant must submit
a mitigation plan detailing how the project's failure to strictly
comply will be compensated. In cases where a waiver is granted, the
applicant should provide mitigation within the same watershed within
which the subject project is proposed. If mitigation within the same
watershed is not possible and/or practical, the applicant shall contribute
funding toward a regional stormwater control project or provide for
equivalent treatment at an alternate location or other equivalent
water quality benefit, in lieu of implementing the required stormwater
control measures on its specific site. Said mitigation must be reviewed
and agreed upon by the Borough of Wallington and Borough Engineer
prior to commencement of mitigation work.
E.
Nonstructural stormwater management strategies:
(1)
To the maximum extent practicable, the standards in Subsections F and G of this section shall be met by incorporating nonstructural stormwater management strategies set forth in Subsection E into the design. The applicant shall identify the nonstructural measures incorporated into the design of the project. If the applicant contends that it is not feasible for engineering, environmental or safety reasons to incorporate any nonstructural stormwater management measures identified in Subsection E(2) below into the design of a particular project, the applicant shall identify the strategy considered and provide a basis for the contention. In both cases, the applicant bears the burden of proving any impracticability.
(2)
Nonstructural stormwater management strategies incorporated into
site design shall:
(a)
Protect areas that provide water quality benefits or areas particularly
susceptible to erosion and sediment loss;
(b)
Minimize impervious surfaces and break up or disconnect the
flow of runoff over impervious surfaces;
(c)
Maximize the protection of natural drainage features and vegetation;
(d)
Minimize the decrease in the "time of concentration" from preconstruction
to post construction.
(e)
Minimize land disturbance including clearing and grading;
(f)
Minimize soil compaction;
(g)
Provide low-maintenance landscaping that encourages retention
and planting of native vegetation and minimizes the use of lawns,
fertilizers and pesticides;
(h)
Provide vegetated open-channel conveyance systems discharging
into and through stable vegetated areas;
(i)
Provide other source controls to prevent or minimize the use
or exposure of pollutants at the site in order to prevent or minimize
the release of those pollutants into stormwater runoff. Such source
controls include, but are not limited to:
[1]
Site design features that help to prevent accumulation of trash and debris in drainage systems, including features that satisfy Subsection E(3) below;
[2]
Site design features that help to prevent discharge of trash
and debris from drainage systems;
[3]
Site design features that help to prevent and/or contain spills
or other harmful accumulations of pollutants at industrial or commercial
developments; and
[4]
When establishing vegetation after land disturbance, applying
fertilizer in accordance with the requirements established under the
Soil Erosion and Sediment Control Act, N.J.S.A. 4:24-39 et seq., and
implementing rules.
(3)
Site design features identified under Subsection E(2)(i)[2] above 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 Subsection E(3)(c) below.
(a)
Design engineers shall use either of the following grates whenever
they use a grate in pavement or another ground surface to collect
stormwater from that surface into a storm drain or surface water body
under that grate:
[1]
The New Jersey Department of Transportation (NJDOT) bicycle-safe
grate, which is described in Chapter 2.4 of the NJDOT Bicycle Compatible
Roadways and Bikeways Planning and Design Guidelines (April 1996);
or
[2]
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 basin floors.
|
(b)
Whenever design engineers use a curb-opening inlet, the clear
space in that curb opening (or each individual clear space, if the
curb opening has two or more clear spaces) shall have an area of no
more than seven square inches, or be no greater than two inches across
the smallest dimension.
(c)
This standard does not apply:
[1]
Where the review agency determines that this standard would
cause inadequate hydraulic performance that could not practicably
be overcome by using additional or larger storm drain inlets that
meet these standards;
[2]
Where flows from the water quality design storm as specified in Subsection G(1) of this section 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:
[3]
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 Subsection G(1); or
[4]
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.
(4)
Any land area used as a nonstructural stormwater management measure to meet the performance standards in Subsections F and G of this section shall be:
(a)
Dedicated to a government agency
(b)
Subjected to a conservation restriction filed with the appropriate
county clerk's office; or
(c)
Subject to an approved equivalent restriction that ensures that
measure or an equivalent stormwater management measure approved by
the reviewing agency is maintained in perpetuity.
F.
Erosion control, groundwater recharge and runoff quantity standards:
(1)
This subsection contains minimum design and performance standards
to control erosion, encourage and control infiltration and groundwater
recharge, and control stormwater runoff quantity impacts of major
development.
(a)
The minimum design and performance standards for erosion control
are those established under the Soil Erosion and Sediment Control
Act, N.J.S.A. 4:24-39 et seq., and implementing rules.
(b)
The minimum design and performance standards for groundwater
recharge are as follows:
[1]
The design engineer shall, using the assumptions and factors for stormwater runoff and groundwater recharge calculations at § 320-5, 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 preconstruction to post
construction for the two-year storm is infiltrated.
[2]
This groundwater recharge requirement does not apply to projects within the "urban redevelopment area" or to projects subject to Subsection F(1)(b)[3] below.
[3]
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."
[4]
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 and
other subsurface structures in the vicinity or downgradient of the
groundwater recharge area.
(c)
Using the criteria for calculating stormwater runoff and groundwater recharge in § 320-5, the design engineer shall comply with at least one of the following standards:
[1]
Demonstrate through hydrologic and hydraulic analysis that for
stormwater leaving the site, post-construction runoff hydrographs
for the two-, ten- and one-hundred-year storm events do not exceed,
at any point in time, the preconstruction runoff hydrographs for the
same storm events;
[2]
Demonstrate through hydrologic and hydraulic analysis that there
is no increase, as compared to the preconstruction condition, in the
peak runoff rates of stormwater leaving the site for the two-, ten-
and one-hundred-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;
[3]
Design stormwater management measures so that the post-construction
peak runoff rates for the two-, ten- and one-hundred-year storm events
are 50%, 75% and 80%, respectively, of the preconstruction 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. The percentages
shall not be applied to post-construction stormwater runoff into tidal
flood hazard areas if the increased volume of stormwater runoff will
not increase flood damages below the point of discharge; or
[4]
In tidal flood hazard areas, stormwater runoff quantity analysis in accordance with Subsection F(1)(c)[1], [2] and [3] above shall only be applied if the increased volume of stormwater runoff could increase flood damages below the point of discharge.
(2)
Any application for a new agricultural development that meets the definition of major development at § 320-2 shall be submitted to the appropriate soil conservation district for review and approval in accordance with the requirements of this section and any applicable soil conservation district guidelines for stormwater runoff quantity and erosion control.
G.
Stormwater runoff quality standards:
(1)
Stormwater management measures shall be designed to reduce the post-construction
load of total suspended solids (TSS) in stormwater runoff by 80% of
the anticipated load from the developed site, expressed as an annual
average. Stormwater management measures shall only be required for
water quality control if an additional 1/4 acre of impervious surface
is being proposed on a development site. 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 Pollution Discharge Elimination System (NJPDES) rules, N.J.A.C.
7:14A, or in a discharge specifically exempt under a NJPDES permit
from this requirement. 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 1. The calculation of the volume of runoff may
take into account the implementation of nonstructural and structural
stormwater management measures.
|
Table 1: Water Quality Design Storm Distribution
| ||||
|---|---|---|---|---|
|
Time
(minutes)
|
Cumulative Rainfall
(inches)
|
Time
(minutes)
|
Cumulative Rainfall
(inches)
| |
|
0
|
0.0000
|
65
|
0.8917
| |
|
5
|
0.00873
|
70
|
0.9917
| |
|
10
|
0.0166
|
75
|
1.0500
| |
|
15
|
0.0250
|
80
|
1.0840
| |
|
20
|
0.0500
|
85
|
1.1170
| |
|
25
|
0.0750
|
90
|
1.1500
| |
|
30
|
0.1000
|
95
|
1.1750
| |
|
35
|
0.1333
|
100
|
1.2000
| |
|
40
|
0.1660
|
105
|
1.2250
| |
|
45
|
0.2000
|
110
|
1.2334
| |
|
50
|
0.2583
|
115
|
1.2417
| |
|
55
|
0.3583
|
120
|
1.2500
| |
|
60
|
0.6250
| |||
(2)
For purposes of TSS reduction calculations, Table 2 below presents the presumed removal rates for certain BMPs designed in accordance with the New Jersey Stormwater Best Management Practices Manual. The BMP Manual may be obtained from the address identified in § 320-7 or found on the Department's website at www.njstormwater.org. The BMP Manual and other sources of technical guidance are listed in § 320-7. TSS reduction shall be calculated based on the removal rates for the BMPs in Table 2 below. Alternative removal rates and methods of calculating removal rates may be used if the design engineer provides documentation demonstrating the capability of these alternative rates and methods to the review agency. A copy of any approved alternative rate or method of calculating the removal rate shall be provided to the Department at the following address: Division of Watershed Management, New Jersey Department of Environmental Protection, P.O. Box 418, Trenton, New Jersey, 08625-0418.
(3)
If more than one BMP in series is necessary to achieve the required
eighty-percent TSS reduction for a site, the applicant shall utilize
the following formula to calculate TSS reduction:
|
R = A + B — (A X B)/100
| ||||
|---|---|---|---|---|
|
Where
| ||||
|
R
|
=
|
total TSS percent load removal from application of both BMPs
| ||
|
A
|
=
|
the TSS percent removal rate (whole number) applicable to the
first (upstream) BMP
| ||
|
B
|
=
|
the TSS percent removal rate (whole number) applicable to the
second (downstream) BMP
| ||
|
In cases where three or more BMPs are used in series, the applicant
shall calculate the TSS reduction for the two most upstream BMPs in
the series using the above formula, then substitute the result (R)
of that calculation in the formula for "A" when calculating the combined
result with the next BMP in the series.
|
|
Table 2: TSS Removal Rates for BMPs
| ||
|---|---|---|
|
Best Management Practice
|
TSS Removal Rate
| |
|
Bioretention systems
|
90%
| |
|
Constructed stormwater wetland
|
90%
| |
|
Extended detention basin
|
40% to 60%
| |
|
Infiltration structure
|
80%
| |
|
Manufactured treatment device
|
See § 320-6B(1)
| |
|
Vegetative filter strip
|
60% to 80%
| |
|
Wet pond
|
50% to 90%
| |
(4)
If there is more than one on-site drainage area, the eighty-percent
TSS removal rate shall apply to each drainage area, unless the runoff
from the subareas converge on site, in which case the removal rate
can be demonstrated through a calculation using a weighted average.
(5)
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 nonstructural strategies and structural measures that optimize nutrient removal while still achieving the performance standards in Subsections F and G of this section.
(6)
Additional information and examples are contained in the New Jersey Stormwater Best Management Practices Manual, which may be obtained from the address identified in § 320-7.
(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)
Special water resource protection areas shall be established 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 within the associated HUC 14 drainage area. These areas shall
be established for the protection of water quality, aesthetic value,
exceptional ecological significance, exceptional recreational significance,
exceptional water supply significance, and exceptional fisheries significance
of those established Category One waters. These areas shall be designated
and protected as follows:
(a)
The applicant shall preserve and maintain a special water resource
protection area in accordance with one of the following:
[1]
A three-hundred-foot special water resource protection area
shall be provided on each side of the waterway, measured perpendicular
to the waterway from the top of the bank outwards or from the center
line of the waterway where the bank is not defined, consisting of
existing vegetation or vegetation allowed to follow natural succession.
[2]
Encroachment within the designated special water resource protection area under Subsection G(8)(a)[1] above shall only be allowed where previous development or disturbance has occurred (for example, active agricultural use, parking area or maintained lawn area). The encroachment shall only be allowed where applicant demonstrates that the functional value and overall condition of the special water resource protection area will be maintained to the maximum extent practicable. In no case shall the remaining special water resource protection area be reduced to less than 150 feet as measured perpendicular to the top of bank of the waterway or center line of the waterway where the bank is undefined. All encroachments proposed under this subparagraph shall be subject to review and approval by the Department.
(b)
All stormwater shall be discharged outside of and flow through
the special water resource protection area and shall comply with the
Standard for Off-Site Stability in the "Standards for Soil Erosion
and Sediment Control in New Jersey," established under the Soil Erosion
and Sediment Control Act, N.J.S.A. 4:24-39 et seq.
(c)
If stormwater discharged outside of and flowing through the
special water resource protection area cannot comply with the Standard
For Off-Site Stability in the "Standards for Soil Erosion and Sediment
Control in New Jersey," established under the Soil Erosion and Sediment
Control Act, N.J.S.A. 4:24-39 et seq., then the stabilization measures
in accordance with the requirements of the above standards may be
placed within the special water resource protection area, provided
that:
[1]
Stabilization measures shall not be placed within 150 feet of
the Category One waterway;
[2]
Stormwater associated with discharges allowed by this section
shall achieve a ninety-five-percent TSS post-construction removal
rate;
[3]
Temperature shall be addressed to ensure no impact on the receiving
waterway;
[4]
The encroachment shall only be allowed where the applicant demonstrates
that the functional value and overall condition of the special water
resource protection area will be maintained to the maximum extent
practicable;
[5]
A conceptual project design meeting shall be held with the appropriate
Department staff and Soil Conservation District staff to identify
necessary stabilization measures; and
[6]
All encroachments proposed under this section shall be subject
to review and approval by the Department.
(d)
A stream corridor protection plan may be developed by a regional stormwater management planning committee as an element of a regional stormwater management plan or by a municipality through an adopted municipal stormwater management plan. If a stream corridor protection plan for a waterway subject to Subsection G(8) of this section has been approved by the Department of Environmental Protection, then the provisions of the plan shall be the applicable special water resource protection area requirements for that waterway. A stream corridor protection plan for a waterway subject to Subsection G(8) shall maintain or enhance the current functional value and overall condition of the special water resource protection area as defined in Subsection G(8)(a)[1] above. In no case shall a stream corridor protection plan allow the reduction of the special water resource protection area to less than 150 feet as measured perpendicular to the waterway subject to this subsection.
A.
Stormwater runoff calculations:
(1)
In complying with the design and performance standards in § 320-4, the design engineer shall calculate stormwater runoff in accordance with 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 the NRCS National Engineering Handbook Section 4 –
Hydrology and Technical Release 55 – Urban Hydrology for Small
Watersheds; or
(b)
The Rational Method for peak stormwater runoff rate calculations
and the Modified Rational Method for stormwater runoff hydrograph
calculations. Use of the Rational Method and Modified Rational Method
are limited to drainage areas of 20 acres or less. Neither the Rational
Method nor Modified Rational Method shall be used to calculate runoff
volumes for groundwater recharge or stormwater runoff infiltration
purposes.
(c)
Alternative groundwater recharge calculation methods may be
used upon approval by the Borough Engineer.
(2)
For the purpose of calculating runoff coefficients and groundwater recharge, there is a presumption that the preconstruction 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 at Subsection A(1)(a) of this section and the Rational and Modified Rational Methods at Subsection A(1)(b) of this section. 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 have 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 calculating preconstruction 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
preconstruction stormwater runoff rates and/or volumes.
(4)
In calculating 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 within
the drainage area.
(5)
Calculation of stormwater runoff from unconnected impervious surfaces
shall be based, as applicable, upon the Two-Step Methodology as described
in the Department's current Stormwater Best Management Practices
Manual or the methodology as described in the NRCS Technical Release
55 – Urban Hydrology for Small Watersheds.
(6)
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. When selecting or calculating runoff coefficients,
the design engineer may calculate groundwater recharge in accordance
with the New Jersey Geological Survey Report GSR-32, A Method for
Evaluating Ground-Water 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 http://www.state.nj.us/dep/njgs/; or at New Jersey
Geological Survey, 29 Arctic Parkway, P.O. Box 427, Trenton, New Jersey
08625-0427; (609) 984-6587.
A.
Structural stormwater management measures:
(1)
Structural stormwater management measures shall be designed to take
into account the existing site conditions which may cause the measure
to fail, have an adverse effect on water quality or quantity, or cause
harm or damage to persons or property, 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; existing or former mines; significant
land fillings and the presence of solution-prone carbonate rocks (limestone).
(2)
Structural 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 § 320-8B(1)(d).
(3)
Structural 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. 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 2.5 inches in diameter.
(5)
Stormwater management basins shall be designed to meet the minimum safety standards for stormwater management basins at § 320-8.
(6)
Where tailwater will affect the hydraulic performance of a stormwater
management measure, the design engineer shall include such effects
in the design of said measure.
B.
Guidelines for stormwater management measures. Stormwater management measure guidelines are available in the New Jersey Best Management Practices Manual and other documents as described in § 320-7. Other stormwater management measures may be utilized, provided the design engineer demonstrates to the satisfaction of the review agency, in consultation with the Borough Engineer, that the proposed measure and its design will accomplish the required water quantity, groundwater recharge and water quality design and performance standards established by § 320-4 of this chapter.
(1)
Manufactured treatment devices may be used to meet the requirements of § 320-4 of this chapter, provided the pollutant removal rates are verified by the New Jersey Corporation for Advanced Technology and certified by the Department.
(2)
Nonverified manufactured treatment devices may also be used for purposes
other than underground discharge of stormwater, where such devices
provide a clear benefit to stormwater quality or flow control in a
manner that facilitates improved nonstructural stormwater management
controls on the site or avoids the need for approval of off-site mitigation.
The benefits of proposed nonverified manufactured treatment devices
must be proved to the satisfaction of the review agency, in consultation
with the Borough Engineer.
(3)
Manufactured treatment devices may be used only where the maintenance plan required by § 320-10 ensures that the manufactured device will be properly maintained for its functional lifespan and will be replaced as needed with management measures that are at least as effective as the original manufactured treatment device working in accordance with manufacturer's specifications.
A.
Primary technical guidance. Technical guidance for stormwater management measures can be found in the documents listed at Subsection A(1) and (2) below, which are available from Maps and Publications, New Jersey Department of Environmental Protection, 428 East State Street, P.O. Box 420, Trenton, New Jersey 08625, (609) 777-1038.
(1)
Guidelines for stormwater management measures are contained in the
New Jersey Stormwater Best Management Practices Manual, as amended.
Information is provided on stormwater management measures such as
bioretention systems, constructed stormwater wetlands, dry wells,
extended detention basins, infiltration structures, manufactured treatment
devices, pervious paving, sand filters, vegetative filter strips,
and wet ponds. This document is also available at www.njstormwater.org.
(2)
The New Jersey Department of Environmental Protection Stormwater
Management Facilities Maintenance Manual, as amended.
B.
Additional technical guidance. Additional technical guidance for
stormwater management measures can be obtained from the following:
(1)
The Standards for Soil Erosion and Sediment Control in New Jersey
promulgated by the State Soil Conservation Committee and incorporated
into N.J.A.C. 2:90. Copies of these standards may be obtained by contacting
the State Soil Conservation Committee or any of the soil conservation
districts listed in N.J.A.C. 2:90-1.3(a)4. The location, address and
telephone number of each soil conservation district may be obtained
from the State Soil Conservation Committee, P.O. Box 330, Trenton,
New Jersey 08625, (609) 292-5540, or the Bergen County Soil Conservation
District, 700 Kinderkamack Road, Suite 106, Oradell, New Jersey 07649,
(201) 261-4407.
(2)
The Rutgers Cooperative Extension Service, (732) 932-9306; and
(3)
The soil conservation districts listed in N.J.A.C. 2:90-1.3(a)4.
The location, address and telephone number of each soil conservation
district may be obtained from the State Soil Conservation Committee,
P.O. Box 330, Trenton, New Jersey, 08625, (609) 292-5540.
(4)
The United States Environmental Protection Agency, including the
National Management Measures to Control Nonpoint Source Pollution
from Urban Areas, available at the website: http://www.epa.gov/owow/nps/urbanmm/index.html.
(5)
Field guides of the United States Department of Agriculture, Natural
Resources Conservation Environmental Protection, 428 East State Street,
P.O. Box 420, Trenton, New Jersey 08625, (609) 777-1038.
(6)
Other similarly authoritative governmental or trade association sources
acceptable to the Borough of Wallington.
A.
General scope. This section sets forth requirements to protect public
safety through the proper design and operation of stormwater management
basins. This section applies to any new stormwater management basin.
B.
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 basin to
ensure proper functioning of the basin 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.
(d)
The trash rack shall be constructed and installed to be rigid,
durable and corrosion-resistant, and shall be designed to withstand
a perpendicular live loading of 300 pounds per square foot.
(2)
An overflow grate is intended to protect the opening in the top of
a stormwater management measure outlet structure. It 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 basins shall include escape provisions as follows:
(a)
If a structural stormwater management measure has an outlet structure, escape provisions shall be incorporated in or on the structure. With the prior approval of the reviewing agency and/or the Borough Engineer identified in Subsection C of this section, a freestanding outlet structure may be exempted from this requirement.
(b)
Safety ledges shall be constructed on the slopes of all new stormwater management basins having a permanent pool of water deeper than 2 1/2 feet. Such safety ledges shall be comprised of two steps. Each step shall be four to six feet in width. One step shall be located approximately 2.5 feet below the permanent water surface, and the second step shall be located one to 1.5 feet above the permanent water surface. See Subsection D of this section for an illustration of safety ledges in a stormwater management basin.
(c)
In new stormwater management basins, the maximum interior slope
for an earthen dam, embankment or berm shall not be steeper than three
horizontal to one vertical in accordance with N.J.A.C. 7:8-6.2(c)3.
(d)
An emergency drawdown method for detention basins is required
where the permanent pool will be more than 2.5 feet deep. This drawdown
method must consider downstream or off-site stability at the outfall
in accordance with the Standards for Soil Erosion and Sediment Control
in New Jersey.
C.
Variance or exemption from safety standards. A variance or exemption
from the safety standards for stormwater management basins may be
granted only upon a written finding by the appropriate reviewing agency
(municipality, county or Department) that the variance or exemption
will not constitute a threat to public safety.
D.
Illustration of safety ledges in a new stormwater management basin.
 |
A.
Submission of site development stormwater plan.
(1)
Whenever an applicant seeks municipal approval of a development subject to this chapter, the applicant shall submit all of the required components of the checklist for the site development stormwater plan at Subsection C below as part of the submission of the applicant's application for subdivision or site plan approval.
(2)
The applicant shall demonstrate through submission requirements that
the project meets the standards set forth in this chapter.
B.
Site development stormwater plan approval. The applicant's site
development project shall be reviewed as a part of the subdivision
or site plan review process by the municipal board or official from
which municipal approval is sought. That municipal board or official
shall consult the engineer retained by the Planning and/or Zoning
Board (as appropriate) to determine if all of the checklist requirements
have been satisfied and to determine if the project meets the standards
set forth in this chapter.
C.
Checklist requirements. The following information shall be required:
(1)
Existing site conditions base map, including topography and the following
information:
(a)
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.
(b)
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.
(2)
Environmental site analysis. A written and graphic description of
the natural and man-made features of the site and its environs. This
description should include a discussion of soil conditions, slopes,
wetlands, waterways and vegetation on the site. Particular attention
should be given to unique, unusual or environmentally sensitive features
and to those that provide particular opportunities or constraints
for development.
(3)
Project description and site plan(s). 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 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 of proposed
changes in natural conditions may also be provided.
(4)
Land use planning and source control plan. This plan shall provide a demonstration of how the goals and standards of §§ 320-3 through 320-6 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. The applicant should refer to the Borough of Wallington Stormwater Management Plan and the Borough of Wallington Stormwater Pollution Prevention Plan for additional requirements.
(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 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 predevelopment and post-development conditions for the design storms specified in § 320-4 of this chapter.
(b)
When the proposed stormwater management control measures (e.g.,
infiltration basins) depend on the hydrologic properties of soils,
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. The Borough
of Wallington shall be notified of site investigation activities and
given the opportunity to have a witness, either prior to approval
or as a condition of approval, as appropriate for the specific type
of measure. Subsequent to approval of the development, post-construction
bulk soil density and infiltration testing shall be required for all
infiltration measures that were used as justification for meeting
the recharge standard, to ensure that they were properly constructed.
(7)
Maintenance and repair plan. The design and planning of the stormwater management facility shall meet the maintenance requirements of § 320-10.
(8)
Waiver from submission requirements. The Borough of Wallington official or board reviewing an application under this chapter may, in consultation with the Borough Engineer, waive submission of any of the requirements in Subsection C(1) through (6) of this section 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 and designed
for ongoing use by the site owner(s) or operator(s) in performing
and documenting maintenance and repair, and by the Borough of Wallington
in ensuring implementation of the maintenance plan. The final maintenance
plan shall be updated and provided to the Borough of Wallington post
construction to include an evaluation based on the specifications
of the initial maintenance plan and as-built conditions.
(2)
The maintenance plan shall contain specific preventative maintenance tasks and schedules; cost estimates, including estimated cost of sediment, debris or trash removal; safety needs; identification of methods and disposal sites for materials removed during maintenance; maintenance requirements for created wetlands and other ecological systems; safety devices and systems; warranty and operational standards from the manufacturers of any manufactured treatment devices; and the name, address and telephone number of the person or persons responsible for preventative and corrective maintenance (including replacement) using maintenance guidelines for stormwater management measures from § 320-7, the Borough of Wallington Municipal Stormwater Management Plan, Borough of Wallington Stormwater Pollution Prevention Plan, any relevant regional stormwater management plan and the maintenance guidelines for stormwater management measures as described in the New Jersey Stormwater Best Management Practices Manual. If the maintenance plan identifies a person other than the developer (for example, a public agency or homeowners' association) as having the responsibility for maintenance, the plan shall include documentation of such person's agreement to assume this responsibility or of the developer's obligation to dedicate a stormwater management facility to such person under an applicable ordinance or regulation.
(3)
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.
(4)
If the person responsible for maintenance identified under Subsection B(2) above is not a public agency, the maintenance plan and any future revisions based on Subsection B(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.
(5)
Preventative and corrective maintenance shall be performed to maintain
the function of the stormwater management measure, including 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.
(6)
The person responsible for maintenance identified under Subsection B(2) above shall 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.
(7)
The person responsible for maintenance identified under Subsection B(2) above shall evaluate the effectiveness of the maintenance plan at least once per year and adjust the plan and the deed as needed.
(8)
The person responsible for maintenance identified under Subsection B(2) above shall retain and make available, upon request by any public entity with administrative, health, environmental or safety authority over the site, the maintenance plan and the documentation required by Subsection B(6) and (7) above.
(10)
Authorized representatives of the Borough of Wallington, including but not limited to the Borough Engineer, Superintendent of Public Works and Building Department Official, may enter the site as needed in order to conduct on-site inspections as discussed in Subsection D. The inspections shall be required to review and confirm that the information filed in the required reports as stated in Subsection B(6) are correct. Additional inspections and reviews may be made as deemed appropriate by the Borough of Wallington.
(11)
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 and enforce penalties
and/or liens as determined by the Borough of Wallington and described
below.
C.
Performance and maintenance guarantee. Nothing in this section 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.
D.
Maintenance access. The maintenance plan shall specifically provide
a specific municipal right of access, which may include stormwater
easements or covenants. Maintenance access shall be provided by the
property owner(s) for access regarding facility inspections and maintenance
as required. Easements and covenants shall be recorded with the Borough
of Wallington prior to issuance of a permit.
E.
Alteration of maintenance plan. Any alteration is maintenance responsibility
or alterations to maintenance plans and agreements must be reviewed
and approved by the Borough of Wallington Building Department Official
or the board that reviewed the application under this chapter in consultation
with the Borough Engineer, Superintendent of Public Works and Building
Department Official.
F.
Recording of information. All maintenance information and alterations to maintenance agreements shall be recorded with the office of the Borough of Wallington Building Department Official as described in Subsection B(8). Copies of the maintenance agreements and alterations to maintenance agreements shall be included in the applicant's stormwater management plans and documents. Recording of the maintenance agreements in accordance with this chapter shall be the responsibility of the owner.
A.
Penalties. Any person, firm or corporation who shall violate any provision of this chapter shall, upon conviction thereof, be punishable as provided in Chapter 1, Article II, General Penalty, of the Code of the Borough of Wallington. In fixing the fine provided hereunder, the Court shall consider the additional or extraordinary cost to the Borough resulting from the violation of the terms of this chapter, as such cost may be certified to the Court by the Superintendent of Public Works. Each day that a violation of this chapter continues after notice of such violation has been given shall be deemed a separate offense.[1]
B.
Responsibility for administration. The Superintendent of the Department
of Public Works, Borough Engineer and Building Department Official
shall administer, implement and enforce the provisions of this chapter.
Any powers granted or duties imposed upon the Superintendent of the
Department of Public Works, Borough Engineer or Building Department
Official may be delegated in writing to the person(s) or entities
acting in the best interest of or in the employment of the Borough
of Wallington.
C.
Enforcement of penalties and liens.
(1)
Should the applicant/owner fail to take the corrective actions, the
Borough of Wallington shall then have the right to take the available
appropriate remedies it deems necessary to correct the violations,
including fining the owner pursuant to penalties for violations of
the Borough of Wallington Land Development Ordinance and to assert
a lien on the subject property in an amount equal to the costs of
remedial actions. The lien shall be enforced in the manner provided
or authorized by law for the enforcement of common law liens on personal
property. The lien shall be recorded with the Borough of Wallington
and shall incur legal interest from the date of recording. The imposition
of any penalty shall not exempt the offender from compliance with
the provisions of this chapter, including assessment of a lien on
the property.
(2)
Whenever a structural BMP is not implemented, operated and/or maintained
in accordance with the stormwater management plan which has been approved
in accordance with this chapter. Any penalty invoked shall be in accordance
with penalties for violations of the Borough of Wallington Land Development
Ordinance.
This chapter shall take effect immediately upon the approval
by the county review agency or 60 days from the receipt of the ordinance
by the county review agency if the county review agency should fail
to act.
