Lakehurst City Zoning Code
§ 25-16.9
Requirements for a Site Development Stormwater Plan.
[Amended 3-4-2021 by Ord. No. 2021-03]
a.
Submission of Site Development Stormwater Plan.
1.
Whenever an applicant seeks municipal approval of a site development that is subject to this section, the applicant shall submit all of the required components of the Checklist for the Site Development Stormwater Plan at subsection 25-16.9c 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 the Borough's land use ordinance or by the Pinelands Commission pursuant to N.J.A.C. 7:50-1.1 et seq.
2.
The applicant shall demonstrate that the site development project meets the standards set forth in this section.
b.
Site Development Stormwater Plan Approval.
The applicant's site development project shall be reviewed as a part of the subdivision or site plan review process by the municipal board or official from which municipal approval is sought. That municipal board or official shall consult the engineer retained by the Land Use Board to determine if all of the checklist requirements have been satisfied and to determine if the project meets the standards set forth in this section.
c.
Submission of the Site Development Stormwater Plan.
The following information shall be required:
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 Borough and the Pinelands Commission in CAD Format 15 or higher, registered and rectified to NJ State Plane Feet NAD 83 or Shape Format NJ 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.
1.
Topographic Base Map. The applicant shall submit a topographic base map of the site which extends a minimum of 300 feet beyond the limits of the proposed development, at a scale of one inch equals 200 feet or greater, showing one foot contour intervals. The map shall indicate the following: existing surface water drainage, shorelines, steep slopes, soils, highly erodible soils, perennial or intermittent streams that drain into or upstream of any Category One or Pinelands Waters, wetlands and floodplains along with their appropriate buffer strips, marshlands and other wetlands, pervious or vegetative surfaces, existing surface and subsurface human-made structures, roads, bearing and distances of property lines, and significant natural and manmade features not otherwise shown. The Borough or the Pinelands Commission may require upstream tributary drainage system information as necessary.
2.
Environmental Site Analysis. The applicant shall submit a written and graphic description of the natural and human-made features of the site and its environs. This description should include:
(a)
A discussion of environmentally critical areas, soil conditions, slopes, wetlands, waterways and vegetation on the site. Particular attention should be given to unique, unusual or environmentally sensitive features and to those that provide particular opportunities for or constraints on development; and
(b)
Detailed soil and other environmental conditions on the portion of the site proposed for installation of any stormwater BMPs, including, at a minimum: soils report based on onsite soil tests; locations and spot elevations in plan view of test pits and permeability tests; permeability test data and calculations; and any other required soil data (e.g., mounding analyses results) correlated with location and elevation of each test site; cross-section of proposed stormwater BMP with side-by-side depiction of soil profile drawn to scale and seasonal high water table elevation identified; and any other information necessary to demonstrate the suitability of the specific proposed structural and nonstructural stormwater management measures relative to the environmental conditions on the portion(s) of the site proposed for implementation of those measures.
3.
Project description and Site Plan(s). The applicant shall submit a map (or maps) at the scale of the topographical base map indicating the location of existing and proposed buildings, roads, parking areas, utilities, structural facilities for stormwater management and sediment control, and other permanent structures. The map(s) shall also clearly show areas where alterations will occur in the natural terrain and cover, including lawns and other landscaping, and seasonal high groundwater elevations. A written description of the site plan and justification for proposed changes in natural conditions shall also be provided.
4.
Land Use Planning and Source Control Plan.
(a)
This plan shall provide a demonstration of how the goals and standards of subsections 25-16.3 through 25-16.5 are being met. The focus of this plan shall be to describe how the site is being developed to meet the objective of controlling groundwater recharge, stormwater quality and stormwater quantity problems at the source by land management and source controls whenever possible.
5.
Stormwater Management Facilities Map. The applicant shall submit a map, at the same scale as the topographic base map, depicting the following information:
(a)
The total area to be disturbed, paved and/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 manage and dispose of stormwater; and
(b)
Details of all stormwater management facility designs, during and after construction, including discharge provisions, discharge capacity for each outlet at different levels of detention (if applicable) and emergency spillway provisions with maximum discharge capacity of each spillway.
6.
Calculations.
(a)
Comprehensive hydrologic and hydraulic design calculations for the pre-development and post-development conditions for the design storms specified in subsection 25-16.4 of this section.
(b)
When the proposed stormwater management control measures depend on the hydrologic properties of soils or require certain separation from the seasonal high-water table, then a soils report shall be submitted. The soils report shall be based on onsite boring logs or soil pit profiles. The number and location of required soil borings or soil pits shall be determined based on what is needed to determine the suitability and distribution of soils present at the location of the control measure.
7.
Maintenance and Repair Plan.
The design and planning of the stormwater management facility shall meet the maintenance requirements of subsection 25-16.10.
8.
Exception from Submission Requirements. The municipal official or board reviewing an application under this section may, in consultation with the municipality's review engineer, waive submission of any of these required components in subsection 25-16.9c1 thru 9c6 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.