Revised Stormwater Management Report

[Project Name West Essex High! Description lands ‘harge BMP Input Param i me Water capacity Cal charge Desig Parameter Symbol Valu Unit Parameter Symbol Parameter Symbol Value _ Unit Empty Portion BMP Area ABMP sa.ft lof RWC under Post | ERWC 0.39 |in ent Qdesign | 0.60 fin Natural Recharge EMP Effective Depth, ERWC Modified to 5 finches of Rainfall this is the design variable | 75MP hi consider dEXC EDRWC on" to capture Paesion [acgaoa| Upper level of the BMP Empty Portion surface (negative if above | dBMPu in lof RWC under innit | RERWC | 0.00 —|in oe 26.5 ground) BRE Wg. over Imp. Area BE Depth of lower surface oF F Runoff Captured EMP, mustbe>=dBMPu_| XC in JAvg. over imp. Area me Post-development Land [Segment Location of BMP SegBMP unitiess Input Zere if Location is distriouted for undetermined IBMP Volume ABMP Check-—> OK "2.440 [cu ft i na a rs dEXC Check—> OK Post-D Deficit Recharge (or desired recharge Vaer loutt oe eee 110,323 |ourt volume) BMP Location—-> Location is selected as distributed or undetermined - Represents | ri 7] Post-D Impervious Area lAvg BMP Recharge i imp sat : 100.0% |2 infiltration (or target impervious Area) Efficiency Fae el | ; F FaRainfall Root Zonie Water Gapeicity RWG: eae its jbecame Runoff. ee i [Pdesign is accurate only after BMP dimensions are updated to make rech volume= deficit velume. The portion IRWC Modified to a Runoff consider dEXC ORWO: | iiecoomas” bil ot 14° inition prior to fing andthe area occupied by BMP are ignored in these calculations. Results are cimmatie: rector Cefactor, 1.67 [mounts IRechanged 58% ly, sensetive to UBMP, make sure dEMP selected is small enough for BMP to empty in less than 3 days. Ferland 5 Rainfall Average Annis P Fava 0 Recharged iy Segment Location of BM yeu seteet“impervious areas" RWC vl 9 minimal bul not zero as determined by Recharge Requirement z ree ln lover Imp. Area 2 i the soil type and a shallow root zone for this Land Cover allowing consideration of lateral flow and other How to solve for different recharge volumes: By default the spreadsheet assigns the values of total deficit recharge volume “VdeF" and total proposed impervious area "Aimp" from the "Annual Recharge" sheet to "der" and "Aimp" on this page. This allows solution for a single BMP to handle the entire recharge requirement assuming the runoff from entire impervious area is available to

Annual Recharge" sheet to "der" and "Aimp" on this page. This allows solution for a single BMP to handle the entire recharge requirement assuming the runoff from entire impervious area is available to the BMP. , {To solve for a smaller BMP or a LID-IMP to recharge only part of the recharge requirement, set Vdef to your target value and Aimp to impervious area directly connected to your infiltration facility and then solve for JABMP or dBMP. To go back to the default configuration clik the "Default Vdef & Aimp* button.