2870 24 Amending and Supplementing Chapter 25 Section 29 of the Township of West Orange Municipal Code Stormwater Mgmt RedLined 2

22 1. The applicant shall utilize the National Oceanographic and Atmospheric Administration (NOAA), National Weather Service’s Atlas 14 Point Precipitation Frequency Estimates: NJ, in accordance with the location(s) of the drainage area(s) of the site. This data is available at: https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html?bkmrk=nj; and 2. The applicant shall utilize Table 5: Current Precipitation Adjustment Factors below, which sets forth the applicable multiplier for the drainage area(s) of the site, in accordance with the county or counties where the drainage area(s) of the site is located. Where the major development lies in more than one county, the precipitation values shall be adjusted according to the percentage of the drainage area in each county. Alternately, separate rainfall totals can be developed for each county using the values in the table below. NOTE: The municipality may instead wish to abbreviate this table along with the text in Item 2 above to reflect only the relevant information, depending on the location of the municipality. The current precipitation adjustment factors added to the ordinance shall be those found in N.J.A.C. 7:8-5.7(c) as Table 5-5. Table 5: Current Precipitation Adjustment Factors County Current Precipitation Adjustment Factors 2-year Design Storm 10-year Design Storm 100-year Design Storm Atlantic 1.01 1.02 1.03 Bergen 1.01 1.03 1.06 Burlington 0.99 1.01 1.04 Camden 1.03 1.04 1.05 Cape May 1.03 1.03 1.04 Cumberland 1.03 1.03 1.01 Essex 1.01 1.03 1.06 Gloucester 1.05 1.06 1.06 Hudson 1.03 1.05 1.09 Hunterdon 1.02 1.05 1.13 Mercer 1.01 1.02 1.04 Middlesex 1.00 1.01 1.03 Monmouth 1.00 1.01 1.02 Morris 1.01 1.03 1.06 Ocean 1.00 1.01 1.03 Passaic 1.00 1.02 1.05 Salem 1.02 1.03 1.03 Somerset 1.00 1.03 1.09