Source: https://www.ecode360.com/14994937
Timestamp: 2018-06-24 22:44:56
Document Index: 569514734

Matched Legal Cases: ['§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 279', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', 'art 630', '§ 407', 'art 630', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 2011', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407', '§ 407']

§ 407-1 Scope and purpose.
§ 407-2 Requirements for site development stormwater plan.
§ 407-3 Methodologies for calculation of stormwater runoff rate and volume, stormwater runoff quality, and groundwater recharge.
§ 407-4 Stormwater management performance standards for major development.
§ 407-5 Design, construction, and safety standards for structural stormwater management measures.
§ 407-6 Inspection, maintenance and repair of stormwater management measures.
§ 407-7 Definitions.
§ 407-9 When effective.
§ 407-10 Appendices.
§ 407-11 Additional sources for technical guidance.
Chapter 407: Stormwater Control
[HISTORY: Adopted by the Township Committee of the Township of Washington 11-9-2010 by Ord. No. 2010-08. [1]Amendments noted where applicable.]
407a Fee Schedule
Editor's Note: This ordinance superseded former Ch. 407, Stormwater Control, adopted 5-8-2007 by Ord. No. 2007-02.
Chapter 407 : Stormwater Control
Increases of stormwater runoff, soil erosion and nonpoint source pollutants have occurred in the past as a result of land development and contribute to the degradation of the water resources of Washington Township and downstream municipalities.
Certain lands of Washington Township lie within the Pinelands Area, and therefore, development in this portion of Washington Township is subject to the requirements of the Pinelands Protection Act (N.J.S.A. 13:18A-1 et seq.) and the implementing regulations and minimum standards contained in the Pinelands Comprehensive Management Plan (N.J.A.C. 7:50-1.1 et seq.) [CMP]. The purpose and intent of these regulations and standards is to promote orderly development of the Pinelands so as to preserve and protect the significant and unique natural, ecological, agricultural, archaeological, historical, scenic, cultural and recreational resources of the Pinelands.
Pinelands Area resources are to be protected in accordance with Pinelands Comprehensive Management Plan at N.J.A.C. 7:50 et seq., New Jersey's Stormwater Management Rules at N.J.A.C. 7:8-1.1 et seq. and New Jersey's surface water quality antidegradation policies contained in the New Jersey Surface Water Quality Standards at N.J.A.C. 7:9B-1.1 et seq. Permitted uses shall maintain the ecological character and quality of the Pinelands, including good water quality and natural rates and volumes of flow.
Increased stormwater rates and volumes and the sediments and pollutants associated with stormwater runoff from future development projects within the Pinelands Area have the potential to adversely affect Washington Township's streams and water resources and the streams and water resources of downstream municipalities.
It is in the public interest to regulate the discharge of stormwater runoff from major development projects, as defined in § 279-7 of this chapter, conducted within the Pinelands Area, as provided in this chapter, in order to control and minimize increases in stormwater runoff rates and volumes, to maintain groundwater recharge, and to control and minimize soil erosion, stream channel erosion and nonpoint source pollution associated with stormwater runoff.
Therefore, it is the purpose of this chapter to establish minimum stormwater management requirements and controls for major development, consistent with the statewide stormwater requirements at N.J.A.C. 7:8, the regulations and standards contained in the Pinelands CMP, and the provisions of the adopted Master Plan and land use ordinances of Washington Township.[1]
Editor's Note: See Ch. 275, Land Development.
Through this chapter, Washington Township has established the following goals for stormwater control:
To assure the adequacy of existing and proposed culverts and bridges and other instream structures;
To restore, protect, maintain and enhance the quality of the streams and water resources of Washington Township and the ecological character and quality of the Pinelands Area;
To minimize pollutants in stormwater runoff from new and existing development in order to restore, protect, enhance and maintain the chemical, physical and biological integrity of the surface water and groundwater of Washington Township, to protect public health and to enhance the domestic, municipal, recreational, industrial and other uses of water; and
In order to achieve the goals for stormwater control set forth in this chapter, Washington Township has identified the following management techniques:
All major development projects undertaken by Washington Township shall comply with this chapter. (Note: This clause is intended to provide consistency with DEP's stormwater management requirements. As per normal practice, all development within the Pinelands Area which is undertaken by a Pinelands Area municipality shall comply with all of the requirements of the CMP.)
Procedures. In addition to other development review procedures set forth in the Code of Washington Township, major developments located within the Pinelands Area shall comply with the stormwater management requirements and specifications set forth in this chapter. New agricultural development that meets the definition of major development in § 407-7 of this chapter shall be submitted to the appropriate Soil Conservation District for review and approval in accordance with the requirements of N.J.A.C. 7:8-5.4(b).
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[2] and do not relieve the applicant of the responsibility to secure required permits or approvals for activities regulated by any other applicable ordinance, code, rule, regulation, statute, act or other provision of law.
Editor's Note: See Articles VIII and IX of Chapter 275, Land Development.
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 ordinance, 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 or stringent provisions or higher standards shall control.
In the event that a regional stormwater management plan(s) is prepared and formally adopted pursuant to N.J.A.C. 7:8-1.1 et seq. for any drainage area(s) or watershed(s) of which Washington Township is a part, the stormwater provisions of such a plan(s) shall be adopted by Washington Township within one year of the adoption of a Regional Stormwater Management Plan (RSWMP) as an amendment to an area-wide water quality management plan. Local ordinances proposed to implement the RSWMP shall be submitted to the Commission for certification within six months of the adoption of the RSWMP per N.J.A.C. 7:8 and the Pinelands CMP (N.J.A.C. 7:50.)
Whenever an applicant seeks municipal approval of a site development that is 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 applicant's application for subdivision or site plan approval. These required components are in addition to any other information required under any provisions of Chapter 275, Land Development, or by the Pinelands Commission pursuant to N.J.A.C. 7:50-1.1 et seq.
Site development stormwater plan approval. The applicant's site development stormwater plan shall be reviewed as a part of the subdivision or site plan review process by the municipal board or official from whom municipal approval is sought. That municipal board or official shall consult the engineer retained by the Planning and 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.
Checklist requirements. Any application for approval of a major development shall include at least the following information. All required engineering plans shall be submitted to the Washington Township and the Pinelands Commission in CAD Format 15 or higher, registered and rectified to New Jersey State Plane Feet NAD 83 or Shape Format New Jersey State Plan Feet NAD 83, and all other documents shall be submitted in both paper and commonly used electronic file formats such as pdf, word processing, database or spreadsheet files. Three copies of each item shall be submitted.
Topographic base map. The applicant shall submit a topographic base map of the site which extends a minimum of 300 feet beyond the limits of the proposed development, at a scale of one inch equals 200 feet or greater, showing one-foot contour intervals. The map shall indicate the following: existing surface water drainage, shorelines, steep slopes, soils, highly erodible soils, perennial or intermittent streams that drain into or upstream of any Category One or Pinelands waters, wetlands and floodplains along with their appropriate buffer strips, marshlands and other wetlands, pervious or vegetative surfaces, existing surface and subsurface human-made structures, roads, bearing and distances of property lines, and significant natural and man-made features not otherwise shown. Washington Township or the Pinelands Commission may require upstream tributary drainage system information as necessary.
Detailed soil and other environmental conditions on the portion of the site proposed for installation of any stormwater BMPs, including, at a minimum, soils report based on on-site soil tests; locations and spot elevations in plan view of test pits and permeability tests; permeability test data and calculations; and any other required soil data (e.g., mounding analyses results) correlated with location and elevation of each test site; cross-section of proposed stormwater BMP with side-by-side depiction of soil profile drawn to scale and seasonal high water table elevation identified; and any other information necessary to demonstrate the suitability of the specific proposed structural and nonstructural stormwater management measures relative to the environmental conditions on the portion(s) of the site proposed for implementation of those measures.
The applicant shall submit a detailed land use planning and source control plan which provides a description of how the site will be developed to meet the erosion control, groundwater recharge and stormwater runoff quantity and quality standards at § 407-4 through use of nonstructural or low-impact development techniques and source controls to the maximum extent practicable before relying on structural BMPs. The land use planning and source control plan shall include a detailed narrative and associated illustrative maps and/or plans that specifically address how each of the following nine nonstructural strategies identified in Subchapter 5 of the NJDEP Stormwater Management Rules (N.J.A.C. 7:8-5) and set forth below {Subsection C(4)(a)[1] through [9]} will be implemented to the maximum extent practicable to meet the standards at § 407-4 of this chapter on the site. If one or more of the nine nonstructural strategies will not be implemented on the site, the applicant shall provide a detailed rationale establishing a basis for the contention that use of the strategy is not practicable on the site.
Minimize the decrease in the pre-development "time of concentration";
For sites where stormwater will be generated from high pollutant loading areas or where stormwater will be exposed to source material, as defined in § 407-7 of this chapter, the applicant shall also demonstrate in the land use planning and source control plan that the requirements of § 407-4 have been met.
The use of nonstructural strategies to meet the performance standards in § 407-4 of this chapter is not required for development sites creating less than one acre of disturbance. However, each application for major development and any other application where Washington Township otherwise requires a landscaping plan shall contain a landscaping or revegetation plan in accordance with the CMP standards at N.J.A.C. 7:50-6.24(c). In addition, the applicant shall demonstrate that, at a minimum, existing trees and vegetation on the development site will be preserved and protected according to the minimum standards established by provisions of Chapter 275, Land Development, or by conditions of zoning or variance approval.
Calculations (groundwater recharge and stormwater runoff rate, volume and quality). The applicant shall submit comprehensive hydrologic and hydraulic design calculations for the pre-development and post-development conditions for the design storms specified in § 407-3. The standards for groundwater recharge and stormwater runoff rate, volume and quality required by § 407-4 shall be met using the methods, calculations and assumptions provided in § 407-3.
Inspection, maintenance and repair plan. The applicant shall submit a detailed plan describing how the proposed stormwater management measure(s) shall meet the maintenance and repair requirements of § 407-6 of this chapter. Said plan shall include, at a minimum, the following elements:
Exception from submission requirements. An exception may be granted from submission of any of these required components [except Subsection C(7) above, Inspection, maintenance, and repair plan] if its absence will not materially affect the review process. However, items required pursuant to the application requirements in the Pinelands CMP [N.J.A.C. 7:50-4.2(b)] shall be submitted to the New Jersey Pinelands Commission unless the Executive Director waives or modifies the application requirements.
In complying with the stormwater runoff quantity and rate standards in § 407-4B, the design engineer shall calculate the stormwater runoff rate and volume using the USDA Natural Resources Conservation Service (NRCS) Runoff Equation, Runoff Curve Numbers, and Dimensionless Unit Hydrograph, as described in the NRCS National Engineering Handbook Part 630 - Hydrology and Technical Release 55 - Urban Hydrology for Small Watersheds, incorporated herein by reference, as amended and supplemented. Alternative methods of calculation may be utilized, provided that such alternative methods are at least as protective as the NRCS methodology when considered on a regional stormwater management basis.
When selecting or calculating runoff curve numbers (CNs) for pre-developed project site conditions, the project site's land cover shall be assumed to be woods in good condition. However, another land cover may be used to calculate runoff coefficients if:
All pre-developed land covers shall be assumed to be in good hydrologic condition and, if cultivated, shall be assumed to have conservation treatment.
In calculating pre-developed site stormwater runoff, the design engineer shall include the effects of all land features and structures, such as ponds, wetlands, depressions, hedgerows, and culverts, that affect pre-developed site stormwater runoff rates and/or volumes.
In complying with the stormwater runoff quality standards in § 407-4F(1), the design engineer shall calculate the stormwater runoff rate and volume using the USDA Natural Resources Conservation Service (NRCS) Runoff Equation, Runoff Curve Numbers, and Dimensionless Unit Hydrograph, as described in the NRCS National Engineering Handbook Part 630 - Hydrology and Technical Release 55 - Urban Hydrology for Small Watersheds, as amended and supplemented.
For purposes of TSS reduction calculations, Table 2 presents the presumed removal rates for certain BMPs designed in accordance with the New Jersey BMP Manual. The BMP Manual may be obtained from the address identified in § 407-11A or found on the NJDEP's website at www.njstormwater.org. TSS reduction shall be calculated based on the removal rates for the BMPs in Table 2.
Alternative stormwater management measures, removal rates and methods of calculating removal rates may be used if the design engineer provides documentation demonstrating the capability of these alternative rates and methods to Washington Township. Any alternative stormwater management measure, removal rate or method of calculating the removal rate shall be subject to approval by Washington Township and a copy shall be provided to the following:
The Division of Watershed Management, New Jersey Department of Environmental Protection, PO Box 418 Trenton, NJ. 08625-0418; and
The New Jersey Pinelands Commission, PO Box 7, New Lisbon, NJ. 08064.
[Source: 7:8-5.5(c) and New Jersey BMP Manual Chapter 4]
40 to 60 (final rate based upon detention time; see NJ BMP Manual, Chap. 9)
Pollutant removal rates as certified by NJDEP; see § 407-3
50 to 90 (final rate based upon pool volume and detention time, see NJ BMP Manual)
Nutrient removal rates for stormwater BMPs. For purposes of post-development nutrient load reduction calculations, Table 2 presents the presumed removal rates for certain BMPs designed in accordance with the New Jersey BMP Manual. If alternative stormwater BMPs are proposed, the applicant shall demonstrate that the selected BMPs will achieve the nutrient removal standard required in § 407-4F.
In complying with the groundwater recharge requirements in § 407-4C(1)(a), the design engineer may calculate groundwater recharge in accordance with the New Jersey Groundwater Recharge Spreadsheet (NJGRS) computer program incorporated herein by reference as amended and supplemented. Information regarding the methodology is available in § 407-10A or from the New Jersey BMP Manual.
In complying with the groundwater recharge requirements in § 407-4C(l)(b), the design engineer shall:
When calculating groundwater recharge or stormwater runoff for pre-developed site conditions, the design engineer shall use the following criteria:
When selecting land covers or calculating runoff curve numbers (CNs) for pre-developed project site conditions, the project site's land cover shall be assumed to be woods. However, another land cover may be used to calculate runoff coefficients if:
To the maximum extent practicable, the performance standards in this § 407-4 for major development shall be met by incorporating the nine nonstructural strategies identified in Subchapter 5 of the New Jersey Stormwater Management Rules (N.J.A.C. 7:8-5), and set forth in § 407-2C(4)(a), into the design. The applicant shall identify within the land use planning and source control plan required by § 407–2C(4) of this chapter how each of the nine nonstructural measures will be incorporated into the design of the project to the maximum extent practicable.
If the applicant contends that it is not practical for engineering, environmental or safety reasons to incorporate any of the nine nonstructural strategies into the design of a particular project, the applicant shall provide a detailed rationale establishing a basis for the contention that use of the strategy is not practical on the site. This rationale shall be submitted in accordance with the checklist requirements established by § 407-2 to Washington Township. A determination by Washington Township that this rationale is inadequate or without merit shall result in a denial of the application unless one of the following conditions is met:
The land use planning and source control plan is amended to include a description of how all nine nonstructural measures will be implemented on the development site, and the amended plan is approved by Washington Township;
The land use planning and source control plan is amended to provide an alternative nonstructural strategy or measures that is not included in the list of nine nonstructural measures, but still meets the performance standards in § 407-4, and the amended plan is approved by Washington Township; or
The land use planning and source control plan is amended to provide an adequate rationale for the contention that use of the particular strategy is not practical on the site, and the amended plan is approved by Washington Township.
In addition to all other requirements of this section, each applicant shall demonstrate that, at a minimum, existing trees and vegetation on the development site will be preserved, protected and maintained according to the minimum standards established by provisions of Chapter 275, Land Development, or by conditions of zoning or variance approval. Existing trees and vegetation shall be protected during construction activities in accordance with the Standard for Tree Protection During Construction provided in the New Jersey State Soil Conservation Committee Standards for Soil Erosion and Sediment Control in New Jersey, which is incorporated herein by reference, as amended and supplemented.
In addition to all other requirements of this section, each application for major development, and any other application where Washington Township otherwise requires a landscaping plan, shall contain a landscaping or revegetation plan in accordance with the Pinelands CMP standards at N.J.A.C. 7:50-6.24(c).
Any land area used as a nonstructural stormwater management measure to meet the performance standards in § 407-4 shall be dedicated to a government entity; shall be subjected to a conservation easement filed with the appropriate County Clerk's office; or shall be subjected to an equivalent form of restriction approved by Washington Township that ensures that that measure, or equivalent stormwater management measure is maintained in perpetuity, as detailed in § 407-6 of this chapter.
Guidance for nonstructural stormwater management strategies is available in the New Jersey BMP Manual, which may be obtained from the address identified in § 407-11A or found on the NJDEP's website at www.njstormwater.org.
Exception for major development sites creating less than one acre of disturbance. The use of nonstructural strategies to meet the performance standards in § 407-4 of this chapter is not required for major development creating less than one acre of disturbance. However, the following requirements shall be met:
Each application for major development and any other application where Washington Township otherwise requires a landscaping plan shall contain a landscaping or revegetation plan prepared in accordance with the Pinelands CMP standards [N.J.A.C. 7:50-6.24(c)];
Each applicant shall demonstrate that, at a minimum, existing trees and vegetation on the development site will be preserved and protected according to the minimum standards established by provisions of Chapter 275, Land Development, or by conditions of zoning or variance approval; and
In addition, the design engineer, using the assumptions and factors for stormwater runoff and groundwater recharge calculations contained in § 407-3, shall either:
Demonstrate through hydrologic and hydraulic analysis that the post-developed stormwater runoff hydrographs from the project site for the two- , ten- , and one-hundred-year storms do not exceed, at any point in time, the site's pre-developed runoff hydrographs for the same storms;
There is no increase in pre-developed stormwater runoff rates from the project site for the two- , ten- , and one-hundred-year storms; and
Any increased stormwater runoff volume or change in stormwater runoff timing for the two- , ten- , and one-hundred-year storms will not increase flood damage at or downstream of the project site. When performing this analysis for pre-developed site conditions, all off-site development levels shall reflect existing conditions. When performing this analysis for post-developed site conditions, all off-site development levels shall reflect full development in accordance with current zoning and land use ordinances; or
Demonstrate that the peak post-developed stormwater runoff rates from the project site for the two- , ten- , and one-hundred-year storms are 50%, 75% and 80%, respectively, of the site's peak pre-developed stormwater runoff rates for the same storms. Peak outflow rates from on-site stormwater measures for these storms shall be adjusted where necessary to account for the discharge of increased stormwater runoff rates and/or volumes from project site areas not controlled by the on-site measures. These percentages do not have to be applied to those portions of the project site that are not proposed for development at the time of application, provided that such areas are:
In tidal flood hazard areas, a stormwater runoff quantity analysis in accordance with Subsection B(4)(a), (b), and (c) above shall only be applied if the increased volume of stormwater runoff could increase flood damages below the point of discharge.
The standards for stormwater runoff quantity and rate required by this section shall be met using the methods, calculations and assumptions provided in § 407-3.
For all major developments, with the exception of those described in § 407-4C(4) below, the design engineer, using the assumptions and factors for stormwater runoff and groundwater recharge calculations contained in § 407-3, shall either:
Demonstrate through hydrologic and hydraulic analysis that any increase in the project site's stormwater runoff volume for the two-year, twenty-four-hour storm from pre-developed to post-developed conditions is infiltrated on site.
The standards for groundwater recharge required by this section shall be met using the methods, calculations and assumptions provided in § 407-3.
Erosion control standards. The minimum design and performance standards for erosion control are those established under the Soil Erosion and Sediment Control Act, N.J.S.A. 4:24-39 et seq., and its implementing regulations, N.J.A.C 2:90-1.1 through 2:90-1.4.
The standards for stormwater runoff quality required by this section shall be met using the methods, calculations, assumptions and pollutant removal rates provided in § 407-3.
The TSS reduction requirement in § 407-4F(2) shall not apply to any stormwater runoff in a discharge regulated under a numeric effluent limitation for TSS imposed under the NJPDES rules (N.J.A.C. 7:14A) or in a discharge specifically exempt under a NJPDES permit from this requirement.
The stormwater runoff quantity and rate standards in § 407-4B shall still be met for all major development sites.
This subsection applies to the following areas of a major development as defined in § 407-7 of this chapter:
For a major development in areas described in Subsection F(1)(a) or (b) above, in addition to the infiltration requirements specified in § 407-4B(2) and the groundwater recharge requirements specified in § 407-4C, the applicant shall demonstrate in the land use planning and source control plan required in § 407-2C(4) that the following requirements have been met:
The stormwater runoff from the areas described in Subsection F(1)(a) and (b) above is segregated to the maximum extent practicable from the stormwater runoff generated from the remainder of the site such that co-mingling of the stormwater runoff from the areas described in Subsection F(1)(a) and (b) above and the remainder of the site will be minimized;
The stormwater runoff from or co-mingled with the areas described in Subsection F(1)(a) and (b) above for the water quality design storm, defined in § 407-3B, Table 1, shall be subject to pretreatment by one or more of the following stormwater BMPs, designed in accordance with the New Jersey BMP Manual to provide ninety-percent TSS removal:
If the potential for contamination of stormwater runoff by petroleum products exists on site, prior to being conveyed to the pretreatment BMP required in § 407-4F(2)(d) above, the stormwater runoff from the areas described in Subsection F(1)(a) and (b) above shall be conveyed through an oil/grease separator or other equivalent manufactured filtering device to remove the petroleum hydrocarbons. The applicant shall provide the reviewing agency with sufficient data to demonstrate acceptable performance of the device.
Threatened and endangered species and associated habitat standards. Stormwater management measures shall address the impacts of the development on habitat for threatened and endangered species, in accordance with N.J.A.C. 7:8-5.2(c), N.J.A.C. 7:50-6.27, and 7:50-6.33 and 7:50-6.34.
Exceptions from strict compliance from the groundwater recharge, stormwater runoff quantity, and stormwater runoff quality requirements established by this chapter may be granted, at the discretion of the Washington Township and subject to approval by the Pinelands Commission, provided that all of the following conditions are met:
The exception is consistent with that allowed by Washington Township;
Washington Township has an adopted and effective municipal stormwater management plan in accordance with N.J.A.C. 7:8-4.4, which includes a mitigation plan in accordance with N.J.A.C. 7:8-4.2(c)11, and is also certified by the Pinelands Commission. The mitigation plan shall identify what measures are necessary to offset the deficit created by granting the exception, and the municipality shall submit a written report to the county review agency and the NJDEP describing the exception and the required mitigation. Guidance for developing municipal stormwater management plans, including mitigation plans, is available from the NJDEP, Division of Watershed Management and the New Jersey BMP Manual.
In lieu of the required mitigation, a monetary in-lieu contribution may be provided by the applicant to Washington Township in accordance with the following:
The amount of the in-lieu contribution shall be determined by Washington Township, but the maximum in-lieu contribution required shall be equivalent to the cost of implementing and maintaining the stormwater management measure(s) for which the exception is granted;
The in-lieu contribution shall be used to fund an off-site stormwater control mitigation project(s) located within the Pinelands Area, within the same drainage area as the development site, and shall meet or exceed the equivalent recharge, quality or quantity performance standards which is lacking on the development site. Such mitigation project shall be identified by Washington Township in Washington Township's adopted municipal stormwater management plan. The stormwater control project to which the monetary contribution will be applied shall be identified by Washington Township at the time the exception is granted. The applicant shall amend the project description and site plan required in § 407-2C(3) to incorporate a description of both the standards for which an on-site exception is being granted and of the selected off-site mitigation project.
Washington Township shall expend the in-lieu contribution to implement the selected off-site mitigation project within five years from the date that payment is received. Should Washington Township fail to expend the in-lieu contribution within the required time frame, the mitigation option provided in § 407-4H(1)(c)[2] of this chapter shall be void, and Washington Township shall be prohibited from collecting in-lieu contributions.
Manufactured treatment devices, provided that their pollutant removal rates are verified by the New Jersey Corporation for Advanced Technology and certified by the NJDEP.
Structural stormwater management measures shall be designed and constructed to be strong, durable, and corrosion resistant (measures that are consistent with the relevant portions of the Residential Site Improvement Standards at N.J.A.C. 5:21-7.3, 5:21-7.4, and 5:21-7.8 shall be deemed to meet this requirement); to minimize and facilitate maintenance and repairs; and to ensure proper functioning.
For all stormwater management measures at a development site, each applicant shall submit a detailed inspection, maintenance and repair plan consistent with the requirements of § 407-5 of this chapter.
Establishment of attractive landscaping in and around the basin that mimics the existing vegetation and incorporates native Pinelands plants, including but not limited to the species listed in N.J.A.C. 7:50-6.25 and 7:50-6.26.
After all construction activities and required field testing have been completed on the development site, as-built plans depicting design and as-built elevations of all stormwater management measures shall be prepared by a licensed land surveyor and submitted to the Municipal Engineer. Based upon the Municipal Engineer's review of the as-built plans, all corrections or remedial actions deemed by the Municipal Engineer to be necessary due to the failure to comply with the standards established by this chapter and/or any reasons of public health or safety shall be completed by the applicant. In lieu of review by the Municipal Engineer, Washington Township reserves the right to engage a professional engineer to review the as-built plans. The applicant shall pay all costs associated with such review.
A stormwater infiltration BMP shall be sited in suitable soils verified by field testing to have permeability rates between one and 20 inches per hour. If such site soils do not exist or if the design engineer demonstrates that it is not practical for engineering, environmental or safety reasons to site the stormwater infiltration BMPs in such soils, then the stormwater infiltration BMPs may be sited in soils verified by field testing to have permeability rates in excess of 20 inches per hour, provided that a bioretention system, designed, installed and maintained in accordance with the New Jersey BMP Manual, is installed to meet one of the following conditions:
The pre-development field test permeability rate shall be determined according to the methodologies provided in § 407-10C(3) of this chapter;
After all construction activities have been completed on the site and the finished grade has been established in the infiltration BMP, post-development field permeability tests shall also be conducted according to the methodologies provided in § 407-10C(3) of this chapter;
The design engineer shall conduct a mounding analysis, as defined in § 407-7, of all stormwater infiltration BMPs. The mounding analysis shall be conducted in accordance with the requirements in § 407-10C(3)(l). Where the mounding analysis identifies adverse impacts, the stormwater infiltration BMP shall be redesigned or relocated, as appropriate.
If the design engineer determines that, for engineering, environmental or safety reasons, temporary stormwater management facilities and sediment basins cannot be constructed on the site, the stormwater infiltration basin may be placed into operation prior to the complete stabilization of its drainage area, provided that the basin's bottom during this period is constructed at a depth at least two feet higher than its final design elevation. All other infiltration BMP construction requirements in this section shall be followed. When the drainage area is completely stabilized, all accumulated sediment shall be removed from the infiltration BMP, which shall then be excavated to its final design elevation in accordance with the construction requirements of this section and the performance standards in § 407-4.
Safety ledges shall be constructed on the slopes of all new structural stormwater management measures having a permanent pool of water deeper than 2 1/2 feet. Such safety ledges shall be comprised of two steps. Each step shall be four to six feet in width. One step shall be located approximately 2 1/2 feet below the permanent water surface, and the second step shall be located 1 1/2 feet above the permanent water surface. See C(5)(a) below, for an illustration of safety ledges in a stormwater management basin.
Applicability. Projects subject to review pursuant to § 407-1C of this chapter shall comply with the requirements of Subsections B and C below.
The design engineer shall prepare an inspection, maintenance and repair plan for the stormwater management measures, including both structural and nonstructural measures incorporated into the design of a major development. This plan shall be submitted as part of the checklist requirements established in § 407-2C. Inspection and maintenance guidelines for stormwater management measures are available in the New Jersey BMP Manual.
The person responsible for inspection, maintenance and repair identified under Subsection B(2) above shall submit the updated inspection, maintenance and repair plan and the documentation required by Subsection B(2) and (3) above to Washington Township once per year.
In the event that the stormwater management measure becomes a public health nuisance or danger to public safety or public health, or if it is in need of maintenance or repair, Washington Township 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 the Municipal Engineer's designee. Washington Township, at 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 within the allowable time, Washington Township may immediately proceed to do so with its own forces and equipment and/or through contractors. The costs and expenses of such maintenance and repair by Washington Township shall be entered on the tax roll as a special charge against the property and collected with any other taxes levied thereon for the year in which the maintenance and repair was performed.
Requirements for inspection, maintenance and repair of stormwater BMP's that rely on infiltration.
The required payment of fees to a municipal stormwater fund in an amount equivalent to the cost of both ongoing maintenance activities and necessary structural replacements. The fee schedule is attached.[1]
Editor's Note: The fee schedule can be found at the end of this chapter.
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.
In the case of development on agricultural land, i.e. lands used for an agricultural use or purpose as defined at N.J.A.C. 7:50-2.11, "development" means any activity that requires a state permit; any activity reviewed by the County Agricultural Boards (CAB) and the State Agricultural Development Committee (SADC), and municipal review of any activity not exempted by the Right to Farm Act, N.J.S.A. 4:1C-1 et seq.
Any division of land into five or more lots; any construction or expansion of any housing development of five or more dwelling units; any construction or expansion of any commercial or industrial use or structure on a site of more than three acres; or any development, grading, clearing or disturbance of an area in excess of 5,000 square feet. "Disturbance" for the purpose of this chapter is the placement of impervious surface or exposure and/or movement of soil or bedrock or clearing, cutting or removing of vegetation.
An area or feature which is of significant environmental value, including but not limited to stream corridors; natural heritage priority sites; habitat of endangered or threatened animal species; threatened or endangered plants of the Pinelands pursuant to N.J.A.C. 7:5-6.27(a); large areas of contiguous open space or upland forest; steep slopes; and wellhead protection and groundwater recharge areas. Threatened and endangered habitat constitutes habitat that is critical for the survival of a local population of threatened and endangered species or habitat that is identified using the Department's Landscape Project as approved by the Department's Endangered and Nongame Species Program, whichever is more inclusive. Threatened and endangered wildlife shall be protected in conformance with N.J.A.C. 7:50-6.33.
Acts necessary to prevent, limit, remedy or compensate for conditions that may result from those cases where an applicant has demonstrated the inability or impracticality of strict compliance with the stormwater management requirements set forth in N.J.A.C. 7:8, in an adopted regional stormwater management plan, or in a local ordinance which is as protective as N.J.A.C. 7:8, and an exception from strict compliance is granted by the Township of Washington and the Pinelands Commission.
The rate at which water moves through a saturated unit area of soil or rock material at hydraulic gradient of one, determined as prescribed in N.J.A.C. 7:9A-6.2 (tube permeameter test), N.J.A.C. 7:9A-6.5 (pit-bailing test) or N.J.A.C. 7:9A-6.6 (piezometer test). Alternative permeability test procedures may be accepted by the approving authority, provided that the test procedure attains saturation of surrounding soils, accounts for hydraulic head effects on infiltration rates, provides a permeability rate with units expressed in inches per hour and is accompanied by a published source reference. Examples of suitable sources include hydrogeology, geotechnical, or engineering text and design manuals, proceedings of American Society for Testing and Materials (ASTM) symposia, or peer-review journals. Neither a soil permeability class rating test, as described in N.J.A.C. 7:9A-6.3, nor a percolation test, as described in N.J.A.C. 7:9A-6.4, are acceptable tests for establishing permeability values for the purpose of complying with this chapter.
Any dredged spoil, solid waste, incinerator residue, filter backwash, sewage, garbage, refuse, oil, grease, sewage sludge, munitions, chemical wastes, biological materials, medical wastes, radioactive substances (except those regulated under the Atomic Energy Act of 1954, as amended (42 U.S.C. § 2011 et seq.), thermal waste, wrecked or discarded equipment, rock, sand, suspended solids, cellar dirt, industrial, municipal, agricultural, and construction waste or runoff, or other residue discharged directly or indirectly to the land, groundwaters or surface waters of the state or to a domestic treatment works. "Pollutant" includes both hazardous and nonhazardous pollutants.
A particle size category consisting of mineral particles which are between 0.05 and 2.0 millimeters in equivalent spherical diameter; also a soil textural class having 85% or more of sand and a content of silt and clay such that the percentage of silt plus 1.5 times the percentage of clay does not exceed 15, as shown in § 407-10C(1) [USDA Soil Textural Triangle].
The Planning and Zoning Board or other board, agency or official of Washington Township with authority to approve or disapprove subdivisions, site plans, construction permits, building permits or other applications for development approval. For the purposes of reviewing development applications and ensuring compliance with the requirements of this chapter, Washington Township may designate the Municipal Engineer or other qualified designee to act on behalf of Washington Township.
The maximum penalty upon conviction of violation under this chapter shall be by one or more of the following: fine not to exceed $2,000, imprisonment in the county jail or at any place provided by the Township for the detention of prisoners for a term not exceeding 90 days, or a period of community service not exceeding 90 days.
Except as otherwise noted, each and every day in which a violation of any provision of this chapter shall constitute a separate violation.
The maximum penalty stated in this section is not intended to state an appropriate penalty for each and every violation. At the discretion of the Judge of the Municipal Court, any lesser penalty including a nominal penalty or no penalty at all, may be appropriate for a particular case or violation.
Approval by the county review agency in accordance with __________.
NJDEP nonstructural strategies point system. The New Jersey Stormwater Management Rules at N.J.A.C. 7:8-5.2(a), and § 407-4A of this chapter, require nonstructural stormwater management strategies to be incorporated into the site design of a major development. A total of nine strategies are to be used to the maximum extent practical to meet the groundwater recharge, stormwater quality and stormwater quantity requirements of the Rules prior to utilizing structural stormwater management measures. The New Jersey Nonstructural Stormwater Management Strategies Point System (NSPS) provides a tool to assist planners, designers and regulators in determining that the strategies have been used to the "maximum extent practical" at a major development as required by the Rules. Refer online to http://www.njstormwater.org for information on the NSPS.
A zone of saturation which exists immediately below a hydraulically restrictive horizon and which has an upper surface that is at a pressure greater than atmospheric, either seasonally or throughout the year.
A particle-size category consisting of mineral particles which are smaller than 0.002 millimeters in equivalent spherical diameter. Also, a soil textural class having more than 40% clay, less than 45% sand, and less than 40% silt, as shown in § 407-10C(1) [USDA Soil Textural Triangle].
A soil textural class having 27 to 40% clay and 20 to 45% sand, as shown in § 407-10C(1) [USDA Soil Textural Triangle].
A soil textural class, as shown in § 407-10C(1) [USDA Soil Textural Triangle], that has a maximum of 85% to 90% sand with a percentage of silt plus 1.5 times the percentage of clay not in excess of 15; or a minimum of 70% to 85% sand with a percentage of silt plus 1.5 times the percentage of clay not in excess of 30.
A soil textural class having 35% or more of clay and 45% or more of sand, as shown in § 407-10C(1) [USDA Soil Textural Triangle].
A soil textural class, as shown in § 407-10C(1) [USDA Soil Textural Triangle], that has a maximum of 20% clay, and the percentage of silt plus twice the percentage of clay exceeds 30, and contains 52% or more sand; or less than 7% clay, less than 50% silt, and between 43% and 52% sand.
A particle-size category consisting of mineral particles which are between 0.002 and 0.05 millimeters in equivalent spherical diameter. It also means a soil textural class having 80% or more of silt and 12% or less of clay, as shown in § 407-10C(1) [USDA Soil Textural Triangle].
A soil textural class having 50% or more of silt and 12% to 27% of clay; or 50% to 80% of silt and less than 12% of clay, as shown in § 407-10C(1) [USDA Soil Textural Triangle].
A soil textural class having 40% or more of clay and 40% or more of silt, as shown in § 407-10C(1) [USDA Soil Textural Triangle].
A soil textural class having 27% to 40% of clay and less than 20% of sand, as shown in § 407-10C(1) [USDA Soil Textural Triangle].
The system of classifying soil texture used by the United States Department of Agriculture which defines 12 soil textural classes based upon the weight percentages of sand, silt and clay in that portion of the soil which passes through a sieve with two-millimeter openings. The soil textural classes are shown graphically on the USDA Soil Textural Triangle, as shown in § 407-10C(1).
Characterized by a dry soil which is resistant to pressure; can be broken in the hands only with difficulty; not breakable between the thumb and forefinger.
All soil test pits and soil permeability results shall be performed under the direct supervision of a professional engineer. All soil logs and permeability test data shall be accompanied by a certification by a professional engineer. The results and location (horizontal and vertical) of all soil test pits and soil permeability tests, both passing and failing, shall be reported to Washington Township.
Each soil test pit log shall report the depth to seasonally high water level, either perched or regional, and the static water level based upon the presence of soil mottles or other redoximorphic features, and observed seepage or saturation. Where redoximorphic features, including soil mottles resulting from soil saturation are present, they shall be interpreted to represent the depth to the seasonal high water table unless soil saturation or seepage is observed at a higher level. When the determination of the seasonally high water table shall be made in ground previously disturbed by excavation, direct observation of the static water table during the months of January through April shall be the only method permitted.
Stormwater infiltration BMPs shall not be installed in soils that exhibit artesian groundwater conditions. A permeability test shall be conducted in all soils that immediately underlie a perched zone of saturation. Any zone of saturation which is present below a soil horizon which exhibits an in-place permeability of less than 0.2 inches per hour shall be considered an artesian zone of saturation unless a minimum one-foot thick zone of unsaturated soil, free of mottling or other redoximorphic features and possessing a chroma of four or higher, exists immediately below the unsuitable soil.
A minimum of one permeability test shall be performed at each soil test pit location. The soil permeability rate shall be determined using test methodology as prescribed in N.J.A.C. 7:9A-6.2 (tube permeameter test), 7:9A-6.5 (pit-bailing test) or 7:9A-6.6 (piezometer test). When the tube permeameter test is used, a minimum of two replicate samples shall be taken and tested. Alternative permeability test procedures may be accepted by the approving authority, provided that the test procedure attains saturation of surrounding soils, accounts for hydraulic head effects on infiltration rates, provides a permeability rate with units expressed in inches per hour and is accompanied by a published source reference. Examples of suitable sources include hydrogeology, geotechnical or engineering text and design manuals, proceedings of the American Society for Testing and Materials (ASTM) symposia, or peer-review journals. Neither a soil permeability class rating test, as described in N.J.A.C. 7:9A-6.3, nor a percolation test, as described in N.J.A.C. 7:9A-6.4, are acceptable tests for establishing permeability values for the purpose of complying with this chapter.
A groundwater mounding analysis shall be provided for each stormwater infiltration BMP. The groundwater mounding analysis shall calculate the maximum height of the groundwater mound based upon the volume of the maximum design storm. The professional engineer conducting the analysis shall provide the Municipal Engineer with the methodology and supporting documentation for the mounding analysis used and shall certify to Washington Township, based upon the analysis, that the groundwater mound will not cause stormwater or groundwater to breakout to the land surface or cause adverse impact to adjacent surface water bodies, wetlands or subsurface structures, including but not limited to basements and septic systems. If there is more than one infiltration BMP proposed, the model shall indicate if and how the mounds will interact. The mounding analysis shall be calculated using the most restrictive soil horizon that will remain in place within the explored aquifer thickness unless alternative analysis is authorized by the Municipal Engineer. The mounding analysis shall be accompanied by a cross-section of the infiltration BMP and surrounding topography, and the mound analysis shall extend out to the point(s) at which the mound intersects with the preexisting maximum water table elevation.
The applicant shall demonstrate that stormwater infiltration BMPs meet the seventy-two-hour drain time requirement established in § 407-5B(1) of this chapter.
Bioretention systems; Used in conjunction with a bioretention system, the infiltration basin takes the place of the standard underdrain;
Where flows from the water quality design storm as specified in § 407-3 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:
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 § 407-3 of this chapter; or
New Jersey BMP Manual available from the Division of Watershed Management, New Jersey Department of Environmental Protection, PO Box 418, Trenton, New Jersey 08625; or online at http://www.njstormwater.org.
NJDEP Stormwater Management Facilities Maintenance Manual available from the Division of Watershed Management, New Jersey Department of Environmental Protection, PO Box 418, Trenton, New Jersey 08625; or online at http://njedl.rutgers.edu/ftp/PDFs/1188.pdf.
New Jersey Pinelands Commission, PO Box 7, 15 Springfield Road, New Lisbon, New Jersey 08064; hone: 609-894-7300; website: http://www.state.nj.us/pinelands.
State Soil Conservation Committee Standards for Soil Erosion and Sediment Control in New Jersey available from all State Soil Conservation Districts (including Burlington County Soil Conservation District, Tiffany Square, Suite 100, 1289 Route 38, Hainesport, New Jersey 08036; phone: 609-267-7410; fax 609-267-3347; website: http://bscd.org).