Revised Stormwater Management Report

[Project Name Description Analysis Date | BMP or LID Type West Essex Highlands _|West Orange, Essex Coun’ 05/31/24 bm ae set — 7 5 —— Parameter Symbol Valu it Parameter Symbol Value Unit Parameter Symbol Value Unit Empty Portion EMP Area ABMP sq.ft lof RWC under Post-D | ERWC 0.39 Jin Hein aad design | 3.05 Natural Recharge Pt EMP Effective Depth, IERWC Modified to inches of Rainfall this is the design variable _| %8MP te Iconsider dEXC EDRWE eee" to capture Pdesion |iimeaeue| Upper level of the BMP Empty Portion surface (negative if above | deMPu lof RWC under In RERWC 0.00 |in aca hie wi 38.5 |in ground) IBMP_ Va. oven Imp ATeS | ae. Depth of lower surface of Runoff Captured BMP, must be>=dBMPu_| EXC ial Avg. over imp. Area 385 jin Post-development Land Segment Location of BMP : SegBMP lunitiess iu Zero Location is distnbuted orundetermined isfy Annual Recharge BMP Check-—> OK n dEXC Check-—-> OK Post-D Deficit Recharge (or desired recharge Vdef Jou.ft Ve 96,727 |cu.tt volume) me BMP Location—> Location is selected as distributed or undetermined Represents Post-D Impervious Area , JAvg BMP Recharge 4 Aimp sa.ft 100.0% |% Infitration (or target Impervious Area) Efficiency Recharged : eRaintall Reat Zone Wales Capsciy'| Rwc Nl lbecame Runoff rol design is accurate only ster EMP dimensions are updated to mickerech volum= deficit votume. The gertion IRWC Modified to: A Runoff consider dEXC RWC | gameoumma Infitrated eels oF EMP infitration prio filing and the area occupied ty BMP are ignored in these caeultions. Resulls are : PeRunoff pliniaticiactor, C-factor whe po units [Recharged_ 49% 1% jsensetive to BMP, make sure dMP selected is small enough for BMP to empty in less than 3 days. For land q Rainfall peverageAniiuel? Pavg oma Recharged Senoa% [Segment Location of BMP if you select “impervious areas” RWC wal be minimal but not zero as determined by Recharge Requirement on eee, lover Imp. Area ss : ine soil type and a shallow root zone for this Land Cover allowing consideration of lateral flow and other losses. How to solve for different recharge volumes: By defaull the spreadsheet assigns the values of total deficit recharge volume "def" and total proposed impervious area "Aimp” from the “Annual Recharge” sheet to "VdeF" and "Aimp" on this page. This allows solution for a single BMP to handle the entire recharge requirement assuming the runoff from

osed impervious area "Aimp” from the “Annual Recharge” sheet to "VdeF" 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 |ABMP or dBMP. To go back to the default configuration clk the "Default Vdef & Aimp" button.