Public Township Council Meeting — Packet

DRAFT PROPOSED REVISIONS – OCTOBER 2011 assuming full development under existing zoning and land use ordinances in the drainage area; (3) Design stormwater management measures so that the post-construction peak runoff rates for the 2-, 10-, and 100-year storm events are 50, 75 and 80 percent, respectively, of the preconstruction peak runoff rates. The percentages apply only to the post-construction stormwater runoff that is attributable to the portion of the site on which the proposed development or project is to be constructed. The percentages shall not be applied to post- construction stormwater runoff into tidal flood hazard areas if the increased volume of stormwater runoff will not increase flood damages below the point of discharge; or (4) In tidal flood hazard areas, stormwater runoff quantity analysis in accordance with 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. 2. Any application for a new agricultural development that meets the definition of major development at subsection 25-29.2 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. g. Stormwater Runoff Quality Standards. 1. Stormwater management measures shall be designed to reduce the post-construction load of total suspended solids (TSS) in

g. Stormwater Runoff Quality Standards. 1. Stormwater management measures shall be designed to reduce the post-construction load of total suspended solids (TSS) in stormwater runoff by eighty (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 (1/4) acre of impervious surface is being proposed on a development site. The requirement to reduce TSS does not apply to any stormwater runoff in a discharge regulated under a numeric effluent limitation for TSS imposed under the New Jersey Pollution Discharge Elimination System (NJPDES) rules, N.J.A.C. 7:14A, or in a discharge specifically exempt under a NJPDES permit from this requirement. The water quality design storm is one and one-quarter (1.25) inches of rainfall in two (2) 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 Cumulative Cumulative Time Rainfall Time Rainfall (Minutes) (Inches) (Minutes) (Inches) 0 0.0000 65 0.8917 5 0.0083 70 0.9917 10 0.0166 75 1.0500 15 0.0250 80 1.0840 20 0.0500 85 1.1170 25 0.0750 90 1.1500 30 0.1000 95 1.1750 35 0.1330 100 1.2000 165