Township of East Windsor, NJ Technical Standards for the Construction of Improvements

Prior to laying pipe,

Prior to installation of manhole and inlets,

Prior to back filling,

Grading;

Prior to rough grading,

After rough grading,

After fine grading,

Curb and sidewalk;

After forming sub-grade and prior to setting form,

After setting forms and prior to pouring concrete,

While pouring concrete (inspector shall be present),

Areas to be paved;

After forming sub-grade and prior to laying base or sub-base,

After laying sub-base or base and prior to laying top course,

Prior to laying top course,

Landscaping;

Prior to installation of trees and shrubs,

Prior to sowing grass seed.

No underground installation shall be covered until inspected and approved by the township engineer.

Where in the opinion of the township engineer materials must be tested for conformance with specifications the applicant shall be responsible for all costs charged by the testing agency.

All improvements which are not to be constructed and inspected under the New Jersey Uniform Construction Code or any duly promulgated subcode thereof and which are required as a condition of subdivision or site plan approval shall be inspected as herein provided. The cost of such inspection shall be borne by the applicant. In the event that the township engineer estimates the inspection fees on such required improvements will exceed $5,000 the applicant shall deposit with the township clerk cash or a certified check in an amount equal to five percent of the estimated cost of improvements to be inspected. Such estimated cost shall represent either the estimated amount as indicated on any posted performance guarantee in the case of the subdivision, or in the case of any other improvement, the estimated cost as determined from plans submitted for a building permit.

After a project is completed and a final inspection has been made to the satisfaction of the township engineer, the engineer will issue a certificate of approval. This certificate shall not be issued until the project is 100 percent completed.

§ 22-2A Traffic Control Devices.

[Ord. 1980-47; Ord. 1984]

All traffic control devices in the township whether temporary or permanent shall conform to the code herein established.

The township herein adopts by reference, without inclusion of the text herein, as its code requesting traffic control devices, the Manual on Uniform Traffic Control Devices for Streets and Highways, prepared by the U.S. Department of Transportation, as the same may from time to time be amended, supplemented or edited.

One copy of said code shall be available in the municipal clerk's office for use by the public.

§ 22-3 Surface Slopes.

[Ord. 1976-34]

In embankment areas the maximum surface slope shall be 3:1.

In paved areas minimum surface slope shall be as close to 0.7 percent as is feasible, but in no event shall it be less than 0.5 percent.

In turfed areas the minimum surface slope shall be as close to 2.0 percent as is feasible, but in no event shall it be less than 1.3 percent.

§ 22-4 Streets and Roads.

[Ord. 1976-34; Ord. 1981-13; Ord. 90-29; Ord. 1991-9; Ord. 2002-14]

§ 22-4.1 General.

The layout of roadways shall follow the configuration indicated on the "Zoning Map of the Township of East Windsor" as adopted on July 28, 1977. Where a street configuration is not shown on the said map, its layout shall conform to the requirements as set forth in whatever site plan or subdivision approval has been granted to the project.

All streets shall provide for at least one lane of vehicular traffic in each direction.

Street signs shall have reflectorized white letters on a green background. Both signs and poles shall be of nonferrous metal or galvanized steel. Signs shall be mounted on a two inch diameter post embedded in concrete, to a depth of 30 inches. The height from ground level shall be seven feet, six inches.

Street names and subdivision names shall not duplicate nor be phonetically similar to the names of existing streets or subdivisions. Any continuation of an existing street shall have the same street name unless specifically approved otherwise by the municipal agency empowered to grant site plan or subdivision approval.

Lights for illuminating streets, parking areas, driveways, walkways and other areas shall be of a type approved by the municipal agency empowered to grant site plan or subdivision approval and the electric utility company. The developer shall pay to the township an amount equal to the per street lighting unit installation charge, and the capital contribution to be paid by the township pursuant to the capital contribution program provided by the Jersey Central Power & Light Company, for each street lighting unit required to be installed by the developer either on or off site along a street, parking area, walkway or other area dedicated or to be dedicated to the township or county, pursuant to the approval of the zoning board of adjustment or the planning board, as the case may be. In addition, the developer shall also be required to make payments to a cash escrow fund established to fund the street light operating charges to be paid by the township to Jersey Central Power & Light Company. The initial payment to the cash escrow account shall be in a sufficient amount as calculated by the township engineer to cover the operating charges for a 24 month period. The cash escrow account shall be replenished as necessary until the township accepts the streets within the development. The payment required hereunder shall be paid in cash or as part of the performance guarantee of the developer pursuant to subsection 19-5.3, 19A-3.6 or 19A-4.28 of the General Ordinances of the Township of East Windsor, 1970. The payment required hereunder shall be made prior to the grant of final approval by the municipal agency empowered to grant site plan or subdivision approval and shall be held in escrow by the township treasurer until paid to Jersey Central Power & Light Company. Upon execution of an agreement between the township and Jersey Central Power & Light Company for the installation of street lighting fixtures and payment of the capital contribution, the township finance director shall release the monies paid for the installation charges and capital contribution hereunder to the township. In addition, the finance director shall release to the township the monies paid for the street light operating charges, on a current basis, as those charges become due.

§ 22-4.2 Classification of Streets.

Definitions. It shall be the duty of the municipal agency empowered to grant site plan or subdivision approval to classify proposed and existing streets according to their use. As a guide to the classification the following definitions should apply:

LOCAL STREET OR ROAD — A road used to provide access to abutting properties.

COLLECTOR STREET OR ROAD — A road used to distribute traffic from arterial roads to local streets; with controlled intersections at arterial streets and not primarily used for access to abutting properties.

MINOR COLLECTOR STREET OR ROAD — The maximum traffic expected is approximately 800 vehicles per day.

MAJOR COLLECTOR STREET OR ROAD — The maximum traffic expected is approximately 1,800 vehicles per day.

ARTERIAL STREET OR ROAD — A road used to connect localities with cross street intersections and accessways minimized, signalized and controlled and affording limited access to abutting properties.

§ 22-4.3 Design Criteria.

Design criteria for each street classification are as follows:

Criteria	Local Street	Minor Collector Street	Major Collector Street	Arterial
Right of Way Width two way	50 ft.	60-66 ft.	70-80 ft.	100-120 ft.
Pavement Width two way	30 ft.	36 ft.	46 ft.
Design Speed for Alignment and Sight Distance Calculations	30 mph	35 mph	50 mph	60 mph
Maximum Longitudinal Grade
Preference	8%	7%	4%	3%
Absolute	10%	8%	5%	3%
Minimum Longitudinal Grade
Preference	0.7%	0.7%	0.7%	0.7%
Absolute	0.5%	0.5%	0.5%	0.5%
Minimum Curb Return Radius at Intersections	15 ft.	20-25 ft.	25 ft.
Minimum Radius of Horizontal Curvature at Centerline of Road	200 ft.	400 ft.	850 ft.	1300 ft.
Minimum Tangent Between Reverse Curves	140 ft.	190 ft.	325 ft.	500 ft.
Curb Face Required	6 in.	6 in.	6-8 in.
Minimum Distance Face of Curb to Edge of Sidewalk	6.0 ft.	6.0 ft.	6.0 ft.
Barrier Island Required	No	No	No	Yes

§ 22-4.4 Pavement Thickness and Design.

General. Pavements shall be designed, based on traffic projections and soil conditions, for a minimum life of 15 years for local streets and 20 years for collectors. The American Association of State Highway and Transportation Officials design standards, shall apply unless another method is specifically approved by the township engineer. Three copies of the standards shall be available for inspection at the office of the township engineer.

In no case shall less than the following material and thickness be used:

1.	Local Street
	Surface Course	1 1/2" (Compacted) FABC-1 Mix No. 5 N.J. Dept. of Transportation Specifications
	Base Course	4 1/2" (Compacted) Bituminous Stabilized Base Mix No. 1 N.J. Dept. of Transportation Specifications
2.	Minor Collector Street
	Surface Course	2" (Compacted) FABC-1 Mix No. 5 N.J. Dept. of Transportation Specifications
	Base Course	5" (Compacted) Bituminous Mix No. 1 N.J. Dept. of Transportation Specifications
3.	Major Collector Street
	Surface Course	2" (Compacted) FABC-1 Mix No. 5 N.J. Dept. of Transportation Specifications
	Base Course	6" (Compacted) Bituminous Stabilized Base Mix No. 1 N.J. Dept. of Transportation Specifications
	Subbase Course	4" (Compacted) Type 5, Class "A" Stone Mix N.J. Dept. of Transportation Specifications
4.	Arterial Street (To be based on detailed design calculations)

§ 22-4.5 Street Intersections.

Street intersections shall be designed according to the following standards unless specifically approved otherwise by a municipal agency granting subdivision or site plan approval:

No more than two streets shall cross at the same point.

Street intersections shall be as close to 90 degree angles as is feasible but in no event shall they be at an angle less than 70 degrees. Measurements as to degrees shall be taken at the centerline of the intersection.

There shall be unobstructed sight along both roadways at an intersection and across their included corners for a distance sufficient to allow drivers to see each other. Depending on the traffic control devices at the intersection, i.e. stop signs, traffic signals, etc., the appropriate technical standard plates shall apply as said plates illustrate and tabulate various conditions of traffic control and speed. The required site distance shall be measured from three feet to ten feet above the road surface.

§ 22-4.6 Culs-de-Sac (Dead End Streets).

Culs-de-sac may not be used to provide access to more than 25 lots.

No cul-de-sac shall have a centerline length from an intersecting street centerline to center point of the closed end of the cul-de-sac of less than 100 feet nor more than 1,000 feet.

An end turn-around shall be provided with a pavement radius of not less than 45 feet and a property line radius of not less than 55 feet.

The center point of the cul-de-sac shall be at or to the left of the centerline of the street when viewed toward the closed end.

In the center of the turnaround a planting island equal in dimension, to the road cartway radius minus the road cartway width shall be provided, in lieu of excessive pavement. This island shall be planted in accordance with the standards set forth in section 22-27.

§ 22-5 Walks and Paths.

[Ord. 1976-34]

§ 22-5.1 Exception.

This section shall not apply to any walkway within the boundaries of a single family dwelling lot.

§ 22-5.2 Definitions.

SIDEWALK — A walk within the Right of Way of a public street.

PEDESTRIAN WALK — A walk outside the Right of Way of public streets.

PATH — A defined paved area used for non-motorized vehicles and/or pedestrians.

§ 22-5.3 Sidewalks.

Sidewalks shall be constructed on both sides of all street within a subdivision and entirely around the perimeter of all culs-de-sac, unless specifically approved otherwise by the agency granting subdivision approval.

Sidewalks shall have a slope from the curb line toward the private property ascending at the rate of one-quarter inch per foot.

The width of sidewalks shall be four feet unless specifically approved otherwise in writing by the agency granting subdivision or site plan approval.

Sidewalks shall be constructed of Portland cement concrete conforming to specifications outlined herein.

The minimum depth of sidewalks shall be four inches except at driveway locations where the minimum depth shall be six inches.

Preformed bituminous cellular joint fillers one-half inch thick shall be placed at intervals not exceeding 20 feet. Dummy (formed) joints shall be cut into the sidewalk at intervals not exceeding the width of the sidewalk.

The sidewalk subgrade shall be compacted prior to the placement of concrete. Any unsuitable material encountered shall be removed and replaced with gravel or other suitable material approved by the township engineer to a minimum depth of four inches.

Sidewalks shall be cured in a manner approved by the township engineer prior to pouring for a minimum of six days after pouring.

Forms for sidewalk shall be made of steel or wood and shall be braced so as to insure proper alignment and grade.

After being placed, the concrete shall be tamped, screened and finished to a true grade and surface. The finish shall be made with a wood float, followed by brushing with a wet soft-hair broom to a neat surface.

Material and gradation of fine and coarse aggregate for use in concrete shall conform to the applicable sections of the New Jersey State Department of Transportation Specifications (as referenced in subsection 22-1.7) except that the maximum size of coarse aggregate shall be three-quarter inch (3/4").

Standard Portland cement Type II or air-entrained Portland cement Type II A shall be used.

Concrete shall be mixed in the proportion, by volume on one part Portland cement, one and three quarter parts fine aggregate and three and one-half parts coarse aggregate. Water shall be added to insure adequate workability but in no case shall the slump be greater than three and one-half inches, and the minimum 28 day compressive strength shall be 3,500 pounds per square inch.

§ 22-5.4 Pedestrian Walks.

Walks on private property or common areas of Planned Unit or Planned Residential Developments shall be constructed at the locations and dimensions shown on the engineering plans as approved in subdivision or site plan approval.

The slope of such walks shall ordinarily be one-quarter inch per foot in a transverse direction.

The use of such walks to transmit surface storm water in a longitudinal direction shall not be permitted.

Material shall be Portland cement concrete unless specifically approved otherwise in site plan or subdivision approval.

All requirements contained in this section that are not specifically inconsistent with this subsection are also to be deemed applicable to pedestrian walks.

§ 22-5.5 Paths.

Improved paved areas on private property or common areas of Planned Developments shall be constructed at the locations and dimensions shown on the engineering plans as approved in subdivision or site plan approval.

The slope of such walks shall ordinarily be one-quarter inch per foot in a transverse direction.

The use of such walks to transmit surface storm water in a longitudinal direction shall not be permitted.

Material shall be Portland cement concrete or bituminous concrete and gravel as approved at subdivision or site plan approval.

If portland cement concrete is used the provisions of section 22-5.2 not specifically inconsistent with subsections 22-5.4 a to d shall be deemed applicable to paths.

If bituminous concrete and stone is used, the following minimum thickness shall apply:

Surface Course	1 1/2" (Compacted) FA-BC1 Mix No. 5 N.J. Dept. of Transportation Specifications
Base Course	4" (Compacted) Type 5, Class "A" Stone Mix N.J. Dept. of Transportation Specifications

§ 22-6 Aprons.

[Ord. 1976-34]

Portland cement concrete aprons shall be constructed between the curb and sidewalk at all driveways.

The minimum thickness of aprons shall be six inches.

Construction of such aprons shall be in accordance with the provisions of subsection 22-5.3 except as modified by any subsection of Section 22-6.

Width and curb line opening standards shall be consistent with those set forth in section 22-8.

§ 22-7 Curbs.

[Ord. 1976-34]

Curb shall be constructed on both sides of all streets within a subdivision and entirely around the perimeter of all culs-de-sac, unless specifically approved otherwise by the agency granting site plan and subdivision approval.

Outdoor parking areas shall ordinarily be curbed around their perimeter unless specifically approved otherwise by the agency granting site plan or subdivision approval. In the event curbing is not required, concrete bumper stops shall be provided for each parking space.

Portland cement concrete material conforming to the proportions and requirements in subsection 22-5.2 shall be used.

Curb size and detail shall be as shown in the Standard Construction details as duly promulgated.

Expansion joints shall consist of bituminous cellular joint filler one-half thick spaced at intervals not exceeding 30 feet.

Curb shall be cured in a manner approved by the township engineer prior to pouring for a minimum of seven days after the pour.

Forms for curb shall be steel or wood and shall be braced to insure proper alignment and grade.

After pouring concrete, it shall be spaded so as to ensure the elimination of air pockets between the forms and concrete. Before the concrete has thoroughly set, the forms on the exposed concrete shall be removed and the front and top sides shall be finished with a wood float and steel trowel to make a uniform finish.

Belgium block curb may be used in lieu of cement concrete curbing provided that it is set in a cement mortar mix. Use of this type of curb is to be specifically approved by the agency granting site plan or subdivision approval.

Curb ramps for the physically handicapped, in accordance with N.J. State Statutes, shall be provided when undertaking construction or reconstruction of streets, curbs, or sidewalks.

Design Criteria for curb ramps shall include:

A sight distance study to insure that curb ramps are placed in such a location that motorists clearly see wheelchair occupants when they cross the roadway.

The curb ramp area should be kept clear of utilities, relocating existing utilities if necessary, so as to provide maximum visibility of and for curb ramp users.

Transitions from the sidewalk to the curb ramp or to the landing area must be gradual.

Curb ramps shall be placed at all intersections and crosswalks.

Two curb ramps will be constructed at each corner, one on each street within the crosswalk area. If the ramp cannot be constructed within the existing crosswalk, the crosswalk shall be modified to include the ramp.

Where feasible the ramp shall be parallel to the sidewalk and out of the normal pedestrian path.

The curb ramp surface shall be constructed with a rough broom finish.

§ 22-8 Driveways.

[Ord. 1976-34]

§ 22-8.1 General.

Driveways shall be so located as to avoid further traffic congestion, undue interference with, or restriction of the free movement of normal road traffic.

Driveways shall be constructed where there are no sharp curves, or steep grades, and where sight distance in conjunction with driveway access would be adequate for safe traffic operation in accordance with the duly promulgated plates indicating the minimum corner clearances and driveway spacings for developed areas.

§ 22-8.2 Safe Sight Distance for Vehicles Exiting from Driveways.

The required sight distance shall measure 3.75 feet to 4.5 feet above the road surface from a vehicle stopped ten feet in back of the edge of pavement. A table of such distances is shown in the plates as promulgated.

§ 22-8.3 Pavement Thickness and Design.

Pavements shall be designed based on traffic projections and soil conditions, and for a minimum life of 15 years. Design standard references are as indicated in subsection 22-4.4 "a". In no case shall less than the following material and thickness be used unless specifically approved by the agency granting site plan or subdivision approval.

Residential Zones.

Two inches (Compacted) bituminous concrete FABC-1 Surface Coarse. Mix No. 5 and, 5" of Type 5, Class "A" Soil Aggregate meeting the requirements of the N.J. Dept. of Transportation specifications or, six inches Portland cement concrete mix as required for Portland cement concrete sidewalks (Section 22-5).

Commercial Zones

Two inches (Compacted) bituminous concrete FABC-1 Surface Coarse. Mix No. 5 and, six inches of Type 5, Class "a" Soil Aggregate meeting the requirements of the N.J. Dept. of Transportation specifications, or two inches (Compacted) FABC-1 Surface Coarse. Mix No. 5 and, three inches (Compacted) bituminous stabilized base coarse, Mix No. 1 meeting the requirements of the N.J. Dept. of Transportation specifications.

Industrial Zones

Two inches (Compacted) bituminous concrete FABC-1 Surface Coarse Mix No. 5 and four inches (Compacted) bituminous Stabilized Base Coarse Mix No. 1 meeting the requirements of the N.J. Dept. of Transportation specifications.

Bituminous concrete surface and/or base coarse are to be compacted using a five ton roller for Residential Zones and a ten ton roller for Commercial and Industrial Zones, unless specifically approved otherwise in writing by the township engineer.

§ 22-8.4 Widths.

General. Driveway dimensions shall be adequate to accommodate the volume and character of the daily flow of vehicles anticipated.

Driveways serving large volumes of daily traffic or traffic over 25 percent of which is truck traffic shall be required to use high to maximum dimensions as indicated in the following table. Driveways serving low daily traffic volumes or traffic less than 25 percent of which is truck traffic shall be permitted to use low to minimum dimensions.

	One-Way Operation		Two-Way Operation
	Curbline opening (ft)	Driveway width (ft)	Curbline opening (ft)	Driveway width (ft)
1-2 Family Residence	12-15	10-13	12-30	10-26
5-10 Family Residence	12-15	10-13	12-30	10-26
10 Family or over Residence	12-30	10-26	24-36	20-30
Commercial/Industrial	24-50	15-34	26-50	24-46
Service Stations	15-38	12-34	24-38	20-34

Driveways are to be paved full width.

§ 22-8.5 Profile.

All grades on driveways shall be sufficiently flat to prevent dragging of any vehicle undercarriage. The maximum permitted gradients for driveways are shown on the plates as promulgated.

§ 22-9 Off Street Parking Areas.

[Ord. 1976-34; Ord. 1978-37; Ord. 1983-6,]

§ 22-9.1 General.

Requirements in this section shall be read in conjunction with and shall be deemed to be supplemental to the requirements and standards set forth in sections 20-5.3 and 20-5.4 of the East Windsor Township Zoning Ordinance.

§ 22-9.2 Size of Spaces and Aisle Width.

The minimum stall width and depth shall be nine and 18 feet respectively, except for the following uses:

Retail store: 10 feet by 18 feet.

Hospital or sanitarium: 10 feet by 18 feet.

Club, nightclub or lounge: 10 feet by 20 feet.

The minimum width of access aisles shall conform to the following requirements:

	Aisle Width
Parking Angle (degrees)	One-Way Traffic (Feet)	Two-Way Traffic (Feet)
0 (Parallel Parking)	12	24
30	14	24
45	14	24
60	18	24
90 (Perpendicular Parking)	24	24

Spaces shall be striped with lines four inches wide, and double striped between spaces with lines two feet on center. A hairpin striping configuration shall be made at the head of the double stripe.

§ 22-9.3 Pavement Thickness and Design.

The standards set forth in subsection 22-8.3 shall be deemed to apply to thickness and design as to pavement in the construction of off-street parking areas.

§ 22-9.4 Fire Lanes.

Every commercial or industrial building or group of contiguous buildings on a single lot the total gross floor area of which is over 20,000 square feet and the facade(s) of which abut(s) on a parking area, or which is only separated from such parking area by a pedestrian walkway, shall have a fire line in each parking area abutting such facade or walkway. The fire lane shall be at least 12 feet wide and shall be so designed as to provide full access to every side of the building bordering on a parking area for fire and other emergency vehicles. The perimeter of fire lanes shall be clearly delineated in paint and the words "Fire Lane" shall be placed adjacent thereto at least every 100 linear feet. The fire lane shall not include loading areas as approved pursuant to any development applications.

§ 22-10 Storm Drainage Flow and Facilities.

[Ord. 1976-34; Ord. 1988-16; Ord. 1998-28; Ord. 2006-4]

§ 22-10.1 General.

All installations shall be properly connected to an approved system.

Drainage facilities are to be designed and constructed considering future development within the drainage area, and so as not to cause adverse flooding, erosion, silting or damaging effects to a roadway or lands that are being developed or improved.

An access to all drainage facilities shall be dedicated to the township by a deed of easement providing no less than a 30 foot wide area in order to permit access for the purposes of maintaining, repairing and correcting drainage facilities.

§ 22-10.2 Location.

Inlet spacings in streets shall not exceed 350 feet or a design inlet flow of 6.0 C.F.S., whichever condition is more stringent.

Access manholes shall not exceed a spacing of 400 feet. Manholes shall further be required at junctions of storm sewer pipes or at changes in direction of storm sewer pipe.

Sufficient inlets shall be installed at each street intersection to avoid flow across intersections.

§ 22-10.3 Construction.

Inlets and manholes shall be constructed in accordance with New Jersey State Department of Transportation Specifications for Road and Bridge Construction, current edition, and any amendments thereto. Inlet and manhole details are shown in the plates as promulgated. Catch basins are not permitted unless specifically approved in writing by the township engineer.

Inlet casting curb height shall be two inches greater than curb face specified unless specifically approved in writing by the township engineer.

Inlet and manhole casting material shall conform to the applicable sections of the New Jersey State Department of Transportation Specifications.

Ends of pipe starting or terminating in an open channel shall have suitable headwalls/endwalls as illustrated in the plates as promulgated.

Reinforced concrete junction chambers shall be constructed in lieu of standard circular manholes where several large diameter pipes intersect or in any other circumstances where standard circular manholes are not feasible. Design drawings shall be submitted to the township engineer for approval.

The minimum and maximum velocity of flow in closed conduits and open channel shall conform to the following:

Type of Channel	Minimum Velocity	Maximum Velocity
Closed conduits	2.5 fps	8 fps.
Open channel (earth)	2.5 fps.	6 fps.
Open channel (lined)	2.5 fps.	10 fps.

The minimum size of storm drain pipe shall be 15 inch diameter or equivalent, unless specifically approved in writing by the township engineer.

The minimum type of pipe shall be reinforced concrete, Class III conforming to the latest ASTM - C76 designation.

The minimum depth of cover over a pipe shall be two feet.

Detention/retention basins may be required to avoid adverse conditions resulting from increased storm water flow.

On plots of land where the water table is suspected to be high and/or drainage conditions are poor, a detailed analysis of the site by a professional engineer may be required prior to the issuance of a building permit.

Where in the opinion of the township engineer the subgrade upon which pipe is to be laid is unsuitable as an acceptable bearing surface, a layer of specified thickness of 3/4" crushed stone or bank-run gravel will be required.

Joints for reinforced concrete pipes shall be made using rubber gaskets or mastic, as approved by the township engineer. Cement mortar joints shall not be permitted unless specifically approved in writing by the township engineer.

§ 22-10.4 Design Criteria.

Hydrologic analysis for the design of storm drain systems (exclusive of retention/detention basins) shall be made using the "Rational Formula", unless an alternate method is requested by the applicant and approved in writing by the township engineer.

The "Rational Formula", i.e. Q=Aci has as its components:

Q	-	Peak storm water discharge of a watershed in cubic feet per second (cfs) based on a minimum storm frequency of 15 years.
A	-	Area of watershed in acres.
c	-	Coefficient of runoff as determined by analysis but in no case less than the values given in Table 1.
i	-	Intensity of rainfall in inches per hour based on a 12 minute time of concentration unless existing conditions and analysis permits a longer period.

Table 1 Coefficient of Runoff Values (c)
	Type of Surface	Minimum Value of c
A.	Soil Cover and Types
	Pavement	0.95
	Stone	0.35
	Sand (bare)	0.30
	Sand (with vegetation)	0.20
	Loam (bare)	0.35
	Loam (with vegetation)	0.25
	Gravel (bare)	0.30
	Gravel (with vegetation	0.20
	Clay (bare)	0.35
	Clay (with vegetation)	0.30
B.	Land Uses
	Agricultural	0.25
	Park/Recreation	0.20
	Residential (Low Density)	0.30
	Residential (Medium Density)	0.40
	Residential (High Density)	0.50
	Commercial/Industrial	0.70
	P.D.	To be determined by detailed analysis

Hydraulic analysis for the sizing of open and closed conduits shall be based on the "Manning Formula," unless an alternative method is requested and approved in writing by the township engineer. Conduits shall be designed flowing full but not under pressure.

The "Manning Formula," i.e. Q = a 1.486 R 2/3 S 1/2 has as its components:

Q	-	Flow in conduit in cubic feet per second.
a	-	Cross-sectional area of water flow through conduit in square feet.
R	-	Hydraulic radius of conduit in feet, i.e. Area divided by wetted perimeter.
S	-	Slope of conduit in feet per foot.
V	-	Average velocity of water in conduit in feet per second.
n	-	Roughness coefficient of the conduit. Values shall not be greater than those shown in Table 2.

Table 2 n values for Manning Formula
Type of Pipe	Minimum Value of n
Concrete	0.013
Asbestos Cement	0.013
Corrugated Metal (1/2" corr.)
0% paved	0.028
25% paved	0.024
50% paved	0.021
100% paved	0.015
Cast Iron (clean)	0.015

§ 22-10.5 through § 22-10.7. (Reserved) [1]

[1]

Editor's Note: Former subsections 22-10.5, Detention/Retention Facilities, 22-10.6, Outflow from Drainage Not to Affect Quality Standards, and 22-10.7, Maintenance of Detention/Retention Basins, previously codified herein, were repealed in their entirety by Ordinance No. 2006-4. See Section 22-10A for regulations pertaining to detention/retention basins.

§ 22-10A Stormwater Control.

[Ord. 2006-4]

§ 22-10A.1 Scope and Purpose.

Policy Statement. Flood control, groundwater recharge, and pollutant reduction through nonstructural or low impact techniques shall be explored before relying on structural BMPs. 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.

Purpose. It is the purpose of this section to establish minimum stormwater management requirements and controls for "major development," as defined in subsection 22-10A.2.

Applicability.

This section shall be applicable to all site plans and subdivisions for the following major developments that require preliminary or final site plan or subdivision review:

Nonresidential major developments; and

CAFRA CENTERS, CORES OR NODES

Aspects of residential major developments that are not preempted by the Residential Site Improvement Standards at N.J.A.C. 5:21.

This section shall also be applicable to all major developments undertaken by the Township of East Windsor.

Compatibility with Other Permit and Ordinance Requirements. Development approvals issued for subdivisions and site plans pursuant to this section 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 section shall be held to be the minimum requirements for the promotion of the public health, safety, and general welfare. This section 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 section 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.

§ 22-10A.2 Definitions.

Unless specifically defined below, words or phrases used in this section shall be interpreted so as to give them the meaning they have in common usage and to give this section 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.

CAFRA PLANNING MAP

Shall mean 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.

Shall mean those areas within boundaries accepted by the Department pursuant to N.J.A.C. 7:8E-5B.

COMPACTION

Shall mean the increase in soil bulk density.

CORE

Shall mean a pedestrian-oriented area of commercial and civic uses serving the surrounding municipality, generally including housing and access to public transportation.

COUNTY REVIEW AGENCY

Shall mean an agency designated by the County Board of Chosen Freeholders to review municipal stormwater management plans and implementing ordinance(s). The county review agency may either be:

A county planning agency; or

A county water resource association created under N.J.S.A. 58:16A-55.5, if the ordinance or resolution delegates authority to approve, conditionally approve, or disapprove municipal stormwater management plans and implementing ordinances.

DEPARTMENT

Shall mean the New Jersey Department of Environmental Protection.

DESIGNATED CENTER

Shall mean a State Development and Redevelopment Plan Center as designated by the State Planning Commission such as urban, regional, town, village, or hamlet.

DESIGN ENGINEER

Shall mean 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.

DEVELOPMENT

Shall mean 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.

DRAINAGE AREA

Shall mean 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.

ENVIRONMENTALLY CRITICAL AREAS

Shall mean 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 well head 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.

EMPOWERMENT NEIGHBORHOOD

Shall mean 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.

EROSION

Shall mean the detachment and movement of soil or rock fragments by water, wind, ice or gravity.

IMPERVIOUS SURFACE

Shall mean a surface that has been covered with a layer of material so that it is highly resistant to infiltration by water.

INFILTRATION

Shall mean the process by which water seeps into the soil from precipitation.

MAJOR DEVELOPMENT

Shall mean any "development" that provides for ultimately disturbing one or more acres of land. 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.

MUNICIPALITY

Shall mean any city, borough, town, township, or village.

NODE

Shall mean an area designated by the State Planning Commission concentrating facilities and activities which are not organized in a compact form.

NUTRIENT

Shall mean a chemical element or compound, such as nitrogen or phosphorus, which is essential to and promotes the development of organisms.

PERSON

Shall mean any individual, corporation, company, partnership, firm, association, Township of East Windsor, 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.

POLLUTANT

Shall mean 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, ground waters or surface waters of the State, or to a domestic treatment works. "Pollutant" includes both hazardous and nonhazardous pollutants.

RECHARGE

Shall mean the amount of water from precipitation that infiltrates into the ground and is not evapotranspired.

SEDIMENT

Shall mean 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.

SITE

Shall mean the lot or lots upon which a major development is to occur or has occurred.

SOIL

Shall mean all unconsolidated mineral and organic material of any origin.

STATE DEVELOPMENT AND REDEVELOPMENT PLAN METROPOLITAN PLANNING AREA (PA1)

Shall mean 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.

STATE PLAN POLICY MAP

Is defined as the geographic application of the State Development and Redevelopment Plan's goals and statewide policies, and the official map of these goals and policies.

STORMWATER

Shall mean 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.

STORMWATER RUNOFF

Shall mean water flow on the surface of the ground or in storm sewers, resulting from precipitation.

STORMWATER MANAGEMENT BASIN

Shall mean 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).

STORMWATER MANAGEMENT MEASURE

Shall mean 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.

TIDAL FLOOD HAZARD AREA

Shall mean a flood hazard area, which may be influenced by stormwater runoff from inland areas, but which is primarily caused by the Atlantic Ocean.

URBAN COORDINATING COUNCIL EMPOWERMENT NEIGHBORHOOD

Shall mean a neighborhood given priority access to State resources through the New Jersey Redevelopment Authority.

URBAN ENTERPRISE ZONES

Shall mean 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.

URBAN REDEVELOPMENT AREA

Previously developed portions of areas:

Delineated on the State Plan Policy Map (SPPM) as the Metropolitan Planning Area (PA1), Designated Centers, Cores or Nodes;

Designated as CAFRA Centers, Cores or Nodes;

Designated as Urban Enterprise Zones; and

Designated as Urban Coordinating Council Empowerment Neighborhoods.

WATERS OF THE STATE

Shall mean the ocean and its estuaries, all springs, streams, wetlands, and bodies of surface or ground water, whether natural or artificial, within the boundaries of the State of New Jersey or subject to its jurisdiction.

WETLANDS or WETLAND

Shall mean an area that is inundated or saturated by surface water or ground water 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.

§ 22-10A.3 General Standards.

Design and Performance Standards for Stormwater Management Measures.

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 subsection 22-10A.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.

The standards in this section 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.

§ 22-10A.4 Stormwater Management Requirements for Major Development.

The development shall incorporate a maintenance plan for the stormwater management measures incorporated into the design of a major development in accordance with subsection 22-10A.10.

Stormwater management measures shall avoid adverse impacts of concentrated flow on habitat for threatened and endangered species as documented in the Departments' Landscape Project or Natural Heritage Database established under N.J.S.A. 13:1B-15.147 through 15.150, particularly Helonias bullata (swamp pink) and/or Clemmys muhlnebergi (bog turtle).

The following linear development projects are exempt from the groundwater recharge, stormwater runoff quantity, and stormwater runoff quality requirements of subsections 22-10A.4f and 22-10A.4g:

The construction of an underground utility line provided that the disturbed areas are revegetated upon completion;

The construction of an aboveground utility line provided that the existing conditions are maintained to the maximum extent practicable; and

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.

A waiver from strict compliance from the groundwater recharge, stormwater runoff quantity, and stormwater runoff quality requirements of subsections 22-10A.4f and 22-10A.4g 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:

The applicant demonstrates that there is a public need for the project that cannot be accomplished by any other means;

The applicant demonstrates through an alternatives analysis, that through the use of nonstructural and structural stormwater management strategies and measures, the option selected complies with the requirements of subsections 22-10A.4f and 22-10A.4g to the maximum extent practicable;

The applicant demonstrates that, in order to meet the requirements of subsections 22-10A.4f and 22-10A.4g, existing structures currently in use, such as homes and buildings, would need to be condemned; and

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 paragraph d3 above within the upstream drainage area of the receiving stream, that would provide additional opportunities to mitigate the requirements of subsections 22-10A.4f and 22-10A.4g that were not achievable on-site.

Nonstructural Stormwater Management Strategies.

To the maximum extent practicable, the standards in subsection 22-10A.4f and subsection 22-10A.4g shall be met by incorporating nonstructural stormwater management strategies set forth at subsection 22-10A.4e 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 paragraph 2 below into the design of a particular project, the applicant shall identify the strategy considered and provide a basis for the contention.

Nonstructural stormwater management strategies incorporated into site design shall:

Protect areas that provide water quality benefits or areas particularly susceptible to erosion and sediment loss;

Minimize impervious surfaces and break up or disconnect the flow of runoff over impervious surfaces;

Maximize the protection of natural drainage features and vegetation;

Minimize the decrease in the "time of concentration" from preconstruction to post construction. "Time of concentration" is defined as the time it takes for runoff to travel from the hydraulically most distant point of the watershed to the point of interest within a watershed;

(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:

Site design features that help to prevent accumulation of trash and debris in drainage systems, including features that satisfy subsection 22-10A.4e3 below;

Site design features that help to prevent discharge of trash and debris from drainage systems;

Site design features that help to prevent and/or contain spills or other harmful accumulations of pollutants at industrial or commercial developments; and

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.

Site design features identified under subsection 22-10A.4e2(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 22-10A.4e3(c) below.

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:

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

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 inches 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.

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.

This standard does not apply:

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;

Where flows from the water quality design storm as specified in subsection 22-10A.4g1 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 four and five-eighths inches long and one and one-half inches wide (this option does not apply for outfall netting facilities); or

A bar screen having a bar spacing of 0.5 inches.

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 22-10A.4g1; or

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.

Any land area used as a nonstructural stormwater management measure to meet the performance standards in subsections 22-10A.4f and 22-10A.4g shall be dedicated to a government agency, subjected to a conservation restriction filed with the appropriate County Clerk's office, or 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.

Guidance for nonstructural stormwater management strategies is available in the New Jersey Stormwater Best Management Practices Manual. The BMP Manual may be obtained from the address identified in subsection 22-10A.7, or found on the Department's website at www.njstormwater.org.

Erosion Control, Groundwater Recharge and Runoff Quantity Standards.

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.

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.

The minimum design and performance standards for groundwater recharge are as follows:

The design engineer shall, using the assumptions and factors for stormwater runoff and groundwater recharge calculations at subsection 22-10A.5, either:

(i)

Demonstrate through hydrologic and hydraulic analysis that the site and its stormwater management measures maintain 100 percent of the average annual preconstruction groundwater recharge volume for the site; or

(ii)

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.

This groundwater recharge requirement does not apply to projects within the "urban redevelopment area," or to projects subject to paragraph (3) below.

The following types of stormwater shall not be recharged:

(i)

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

(ii)

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.

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.

In order to control stormwater runoff quantity impacts, the design engineer shall, using the assumptions and factors for stormwater runoff calculations at subsection 22-10A.5, complete one of the following:

Demonstrate through hydrologic and hydraulic analysis that for stormwater leaving the site, post-construction runoff hydrographs for the 2-, 10-, and 100-year storm events do not exceed, at any point in time, the preconstruction runoff hydrographs for the same storm events;

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 2-, 10-, 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;

Design stormwater management measures so that the post-construction peak runoff rates for the 2-, 10- and 100-year storm events are 50, 75 and 80 percent, 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. 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

In tidal flood hazard areas, stormwater runoff quantity analysis in accordance with paragraphs (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.

Any application for a new agricultural development that meets the definition of major development at subsection 22-10A.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. For the purposes of this section, "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 manufacturing of agriculturally related products.

Stormwater Runoff Quality Standards.

Stormwater management measures shall be designed to reduce the post-construction load of total suspended solids (TSS) in stormwater runoff by 80 percent 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 one-quarter 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)
0	0.0000
5	0.0083
10	0.0166
15	0.0250
20	0.0500
25	0.0750
30	0.1000
35	0.1330
40	0.1660
45	0.2000
50	0.2583
55	0.3583
60	0.6250
65	0.8917
70	0.9917
75	1.0500
80	1.0840
85	1.1170
90	1.1500
95	1.1750
100	1.2000
105	1.2250
110	1.2334
115	1.2417
120	1.2500

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 subsection 22-10A.7, or found on the Department's website at www.njstormwater.org. The BMP Manual and other sources of technical guidance are listed in subsection 22-10A.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, PO Box 418, Trenton, New Jersey, 08625-0418.

If more than one BMP in series is necessary to achieve the required 80 percent 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, and
A	=	the TSS percent removal rate applicable to the first BMP
B	=	the TSS percent removal rate applicable to the second BMP.

Table 2: TSS Removal Rates for BMPs
Best Management Practice	TSS Percent Removal Rate
Bioretention Systems	90
Constructed Stormwater Wetland	90
Extended Detention Basin	40-60
Infiltration Structure	80
Manufactured Treatment Device	See subsection 22-10A.6c
Sand Filter	80
Vegetative Filter Strip	60-80
Wet Pond	50-90

If there is more than one on-site drainage area, the 80 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.

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 22-10A.4f and 22-10A.4g.

Additional information and examples are contained in the New Jersey Stormwater Best Management Practices Manual, which may be obtained from the address identified in subsection 22-10A.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.

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 HUC14 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:

The applicant shall preserve and maintain a special water resource protection area in accordance with one of the following:

A 300-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 centerline of the waterway where the bank is not defined, consisting of existing vegetation or vegetation allowed to follow natural succession is provided.

Encroachment within the designated special water resource protection area under paragraph (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 centerline of the waterway where the bank is undefined. All encroachments proposed under this subparagraph shall be subject to review and approval by the Department.

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.

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:

Stabilization measures shall not be placed within 150 feet of the Category One waterway;

Stormwater associated with discharges allowed by this section shall achieve a 95 percent TSS post-construction removal rate;

Temperature shall be addressed to ensure no impact on the receiving waterway;

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.

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 22-10A.4g8 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 22-10A.4g8 shall maintain or enhance the current functional value and overall condition of the special water resource protection area as defined in subsection 22-10A.4g8(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.

(e)

Paragraph g8 does not apply to the construction of one individual single family dwelling that is not part of a larger development on a lot receiving preliminary or final subdivision approval on or before February 2, 2004, provided that the construction begins on or before February 2, 2009.

§ 22-10A.5 Calculation of Stormwater Runoff and Groundwater Recharge.

Stormwater runoff shall be calculated in accordance with the following:

The design engineer shall calculate runoff using one of the following methods:

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

The Rational Method for peak flow and the Modified Rational Method for hydrograph computations.

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 at subsection 22-10A.5a1(a) and the Rational and Modified Rational Methods at subsection 22-10A.5a1(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 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).

In computing 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 volumes.

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 and other methods may be employed.

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.

Groundwater recharge may be calculated in accordance with the following:

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.

§ 22-10A.6 Standards for Structural Stormwater Management Measures.

Standards for structural stormwater management measures are as follows:

Structural stormwater management measures shall be designed to take into account the existing site conditions, including, for example, 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).

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 one-third the width of the diameter of the orifice or one-third 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 subsection 22-10A.8d.

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, 7.4, and 7.5 shall be deemed to meet this requirement.

At the intake to the outlet from the stormwater management basin, the orifice size shall be a minimum of two and one-half inches in diameter.

Stormwater management basins shall be designed to meet the minimum safety standards for stormwater management basins at subsection 22-10A.8.

Stormwater management measure guidelines are available in the New Jersey Stormwater Best Management Practices Manual. Other stormwater management measures may be utilized provided the design engineer demonstrates that the proposed measure and its design will accomplish the required water quantity, groundwater recharge and water quality design and performance standards established by subsection 22-10A.4 of this section.

Manufactured treatment devices may be used to meet the requirements of subsection 22-10A.4 of this section, provided the pollutant removal rates are verified by the New Jersey Corporation for Advanced Technology and certified by the Department.

§ 22-10A.7 Sources for Technical Guidance.

Technical guidance for stormwater management measures can be found in the documents listed at paragraphs 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; telephone (609) 777-1038.

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.

The New Jersey Department of Environmental Protection Stormwater Management Facilities Maintenance Manual, as amended.

Additional technical guidance for stormwater management measures can be obtained from the following:

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;

The Rutgers Cooperative Extension Service, (732) 932-9306; and

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.

§ 22-10A.8 Safety Standards for Stormwater Management Basins.

This subsection sets forth requirements to protect public safety through the proper design and operation of stormwater management basins. This subsection applies to any new stormwater management basin.

Requirements for Trash Racks, Overflow Grates and Escape Provisions.

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:

The trash rack shall have parallel bars, with no greater than six inch spacing between the bars.

The trash rack shall be designed so as not to adversely affect the hydraulic performance of the outlet pipe or structure.

The average velocity of flow through a clean trash rack is not to exceed two and one-half 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.

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 lbs./ft. sq.

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:

The overflow grate shall be secured to the outlet structure but removable for emergencies and maintenance.

The overflow grate spacing shall be no less than two inches across the smallest dimension.

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 lbs./ft. sq.

For purposes of this paragraph 3, escape provisions means the permanent installation of ladders, steps, rungs, or other features that provide easily accessible means of egress from stormwater management basins. Stormwater management basins shall include escape provisions as follows:

If a stormwater management basin has an outlet structure, escape provisions shall be incorporated in or on the structure. With the prior approval of the reviewing agency identified in subsection 22-10A.8c a freestanding outlet structure may be exempted from this requirement.

Safety ledges shall be constructed on the slopes of all new stormwater management basins having a permanent pool of water deeper than two and one-half 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 two and one-half feet below the permanent water surface, and the second step shall be located one to one and one-half feet above the permanent water surface. See subsection 22-10A.8d for an illustration of safety ledges in a stormwater management basin

In new stormwater management basins, the maximum interior slope for an earthen dam, embankment, or berm shall not be steeper than 3 horizontal to 1 vertical.

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.

Illustration of Safety Ledges in a New Stormwater Management Basin.

§ 22-10A.9 Requirements for a Site Development Stormwater Plan.

Submission of Site Development Stormwater Plan.

Whenever an applicant seeks municipal approval of a development subject to this section, the applicant shall submit all of the required components of the Checklist for the Site Development Stormwater Plan at subsection 22-10A.9c below as part of the submission of the applicant's application for subdivision or site plan approval.

The applicant shall demonstrate that the project meets the standards set forth in this section.

The applicant shall submit four copies of the materials listed in the checklist for site development stormwater plans in accordance with subsection 22-10A.9c of this section.

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 ordinance.

Checklist Requirements. The following information shall be required:

Topographic 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 1 inch = 200 feetor 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 flood plains 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.

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.

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 ground water elevations. A written description of the site plan and justification of proposed changes in natural conditions may also be provided.

Land Use Planning and Source Control Plan. This plan shall provide a demonstration of how the goals and standards of subsections 22-10A.3 through 22-10A.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.

Stormwater Management Facilities Map. The following information, illustrated on a map of the same scale as the topographic base map, shall be included:

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.

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.

Calculations.

Comprehensive hydrologic and hydraulic design calculations for the predevelopment and post-development conditions for the design storms specified in subsection 22-10A.4 of this section.

When the proposed stormwater management control measures (e.g., infiltration basins) depends 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.

Maintenance and Repair Plan. The design and planning of the stormwater management facility shall meet the maintenance requirements of subsection 22-10A.10.

Waiver from Submission Requirements. The municipal official or board reviewing an application under this ordinance may, in consultation with the municipal engineer, waive submission of any of the requirements in subsections 22-10A.9c1 through 22-10A.9c6 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.

§ 22-10A.10 Maintenance and Repair.

Applicability.

Projects subject to review as in subsection 22-10A.1c of this section shall comply with the requirements of subsections 22-10A.10b, 22-10A.10c and 22-10A.10d.

General Maintenance.

The design engineer shall prepare a maintenance plan for the stormwater management measures incorporated into the design of a major development.

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). Maintenance guidelines for stormwater management measures are available 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.

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.

If the person responsible for maintenance identified under subsection 22-10A.10b2 above is not a public agency, the maintenance plan and any future revisions based on subsection 22-10A.10b7 below shall be recorded upon the deed of record for each property on which the maintenance described in the maintenance plan must be undertaken.

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.

The person responsible for maintenance identified under subsection 22-10A.10b2 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.

The person responsible for maintenance identified under subsection 22-10A.10b2 above shall evaluate the effectiveness of the maintenance plan at least once per year and adjust the plan and the deed as needed.

The person responsible for maintenance identified under subsection 22-10A.10b2 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 subsections 22-10A.10b6 and 22-10A.10b7 above.

The requirements of subsections 22-10A.10b3 and 22-10A.10b4 do not apply to stormwater management facilities that are dedicated to and accepted by the municipality or another governmental agency.

10.

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.

All detention/retention basins for stormwater drainage in any multifamily residential use development or nonresidential use developments shall be owned and maintained by a condominium, homeowner's association or other private individual or group. All detention/retention basins for stormwater drainage located within or as a part of a solely single-family residential use development shall be dedicated to the Township of East Windsor. Prior to the acceptance of any stormwater facility by the Township of East Windsor, same shall be certified by the township engineer to have been constructed in accordance with the requirements and specifications of this section. In addition, prior to the issuance of any certificate of occupancy, the developer shall post with the Township of East Windsor an amount to be determined in accordance with the formula set forth below for maintenance for 25 years to be placed in an escrow account maintenance, which funds shall be utilized for the maintenance of such detention/retention facility.

The fees required by Schedule "A"[1] set forth below shall be for the purpose of reimbursing the township for direct fees, costs, charges and expenses for the maintenance of a detention/retention facility including, but not limited to routine mowing, maintenance of landscaping, general maintenance concerning inlets, cleaning of property and long range maintenance on a periodic basis.

[1]

Editor's Note: Schedule A, referred to herein, is included as an attachment to this chapter.

The escrow amount required by Schedule "A"[2] shall be deposited with the township prior to the issuance of any certificates of occupancy. All funds shall remain in an interest bearing escrow account. The entire amount of any interest shall be applied to the purposes for which it was originally deposited.

[2]

Editor's Note: Schedule A, referred to herein, is included as an attachment to this chapter.

All costs, expenses, charges and fees incurred by the township for the maintenance of a detention/retention basin shall be charged against the escrow fund established for the maintenance of such a basin.

The township will conduct maintenance programs at its discretion and shall maintain liability insurance on the basin out of the funds so created. The maintenance programs may include:

Routine mowing of the property. Mowing costs shall be estimated at the rate of one acre per hour. The cost per hour for township labor and equipment shall be multiplied by the number of acres to be mowed. A base number shall also be included for the mobilization and the maintenance of the equipment.

Maintenance of landscaping. The cost shall be based upon the number of hours for landscape maintenance multiplied by a rate per hour for labor and equipment. Any and all additional stock which shall be necessary to replace approved landscaping shall also be charged against the fund.

General maintenance. The cost for general maintenance shall be based upon a one-hour mobilization time together with the total number of hours expended times the rate per hour for township labor and equipment.