241220_42 ERW_Stormwater Report FULL

NJ DEP 2-hr WQ Rainfall=1.25"241220_42 ERW Waymaker Printed 12/20/2024Prepared by Colliers Engineering & Design Page 52HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Reach 10R: Inflow Outflow Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 2 1 0 Inflow Area=2.619 ac 2.67 cfs 2.67 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

NJ DEP 2-hr WQ Rainfall=1.25"241220_42 ERW Waymaker Printed 12/20/2024Prepared by Colliers Engineering & Design Page 53HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Reach DP1-PR: Inflow Outflow Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 0.115 0.11 0.105 0.1 0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 Inflow Area=2.922 ac 0.11 cfs 0.11 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

NJ DEP 2-hr WQ Rainfall=1.25"241220_42 ERW Waymaker Printed 12/20/2024Prepared by Colliers Engineering & Design Page 54HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Reach DP2-PR: Inflow Outflow Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 0.046 0.044 0.042 0.04 0.038 0.036 0.034 0.032 0.03 0.028 0.026 0.024 0.022 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 Inflow Area=0.170 ac 0.04 cfs 0.04 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

NJ DEP 2-hr WQ Rainfall=1.25"241220_42 ERW Waymaker Printed 12/20/2024Prepared by Colliers Engineering & Design Page 55HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Pond BASIN: - Chamber Wizard Field A Chamber Model = ADS_StormTech MC-3500 d +Cap (ADS StormTech® MC-3500 d rev 03/14 with Cap volume) Effective Size= 70.4"W x 45.0"H => 15.33 sf x 7.17'L = 110.0 cf Overall Size= 77.0"W x 45.0"H x 7.50'L with 0.33' Overlap Cap Storage= 14.9 cf x 2 x 5 rows = 149.0 cf 77.0" Wide + 9.0" Spacing = 86.0" C-C Row Spacing 19 Chambers/Row x 7.17' Long +1.85' Cap Length x 2 = 139.93' Row Length +12.0" End Stone x 2 = 141.93' Base Length 5 Rows x 77.0" Wide + 9.0" Spacing x 4 + 18.0" Side Stone x 2 = 38.08' Base Width 9.0" Stone Base + 45.0" Chamber Height + 12.0" Stone Cover = 5.50' Field Height 95 Chambers x 110.0 cf + 14.9 cf Cap Volume x 2 x 5 Rows = 10,594.4 cf Chamber Storage 29,728.4 cf Field - 10,594.4 cf Chambers = 19,134.0 cf Stone x 40.0% Voids = 7,653.6 cf Stone Storage Chamber Storage + Stone Storage = 18,248.0 cf = 0.419 af Overall Storage Efficiency = 61.4% Overall System Size = 141.93' x 38.08' x 5.50' 95 Chambers 1,101.1 cy Field 708.7 cy Stone This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

NJ DEP 2-hr WQ Rainfall=1.25"241220_42 ERW Waymaker Printed 12/20/2024Prepared by Colliers Engineering & Design Page 56HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Pond BASIN: Inflow Outflow Discarded Primary Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 2 1 0 Inflow Area=2.619 ac Peak Elev=13.95' Storage=0.085 af 2.67 cfs 0.10 cfs 0.10 cfs 0.00 cfs This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

Stormwater Management Report | November 19, 2024 Appendix B Recharge Worksheet

Annual Groundwater Recharge Analysis (based on GSR-32) Project Name: Waymaker Select Township ↓ Average Annual P (in) Climatic Factor Description: Proposed Site Improvements ESSEX CO., WEST ORANGE TOWN 49.0 1.67 Analysis Date: 11/18/24 Land Segment Area (acres) TR-55 Land Cover Soil Annual Recharge (in) Annual Recharge (cu.ft) Land Segment Area (acres) TR-55 Land Cover Soil Annual Recharge (in) Annual Recharge (cu.ft) 1 0.319 Impervious areas Boonton 0.0 - 1 0.847 Impervious areas Boonton 0.0 - 2 2.773 Open space Boonton 14.9 150,467 2 2.245 Open space Boonton 14.9 121,817 3 Gravel, dirt Boonton - - 3 Gravel, dirt Boonton - - 4 Gravel, dirt Freehold - - 4 Open space Woodstown - - 5 Row Crop Woodstown - - 5 0 brush Adelphia - - 6 Impervious areas Woodstown - - 6 0 Brush Adelphia - - 7 Open space Woodstown - - 7 0 Brush Adelphia - - 8 0 brush Adelphia - - 8 0 Brush Adelphia Variant - - 9 0 brush Adelphia - - 9 0 Brush Adelphia - - 10 0 brush Adelphia - - 10 0 Brush Abbottstown - - 11 0 Brush Abbottstown - - 11 0 Brush Abbottstown - - 12 0 Brush Abbottstown - - 12 0 Brush Abbottstown - - 13 0 Brush Abbottstown - - 13 0 Brush Abbottstown - - 14 0 Brush Abbottstown - - 14 0 Brush Abbottstown - - 15 0 Brush Abbottstown - - 15 0 Brush Abbottstown - - Total = 3.1 Total Annual Recharge (in) Total Annual Recharge (cu-ft) Total = 3.1 Total Annual Recharge (in) Total Annual Recharge (cu.ft) 13.4 150,467 10.9 121,817 Procedure to fill the Pre-Development and Post-Development Conditions Tables % of Pre-Developed Annual Recharge to Preserve = 100% Total Impervious Area (sq.ft) 36,895 For each land segment, first enter the area, then select TR-55 Land Cover, then select Soil. Start from the top of the table Post-Development Annual Recharge Deficit= 28,650 (cubic feet) and proceed downward. Don't leave blank rows (with A=0) in between your segment entries. Rows with A=0 will not be displayed or used in calculations. For impervious areas outside of standard lots select "Impervious Areas" as the Land Cover. RWC= 3.59 (in) DRWC= 0.00 (in) Soil type for impervious areas are only required if an infiltration facility will be built within these areas. ERWC = 0.59 (in) EDRWC= 0.00 (in) Pre-Developed Conditions Post-Developed Conditions Recharge Efficiency Parameters Calculations (area averages) Annual Recharge Requirements Calculation ↓ New

e areas. ERWC = 0.59 (in) EDRWC= 0.00 (in) Pre-Developed Conditions Post-Developed Conditions Recharge Efficiency Parameters Calculations (area averages) Annual Recharge Requirements Calculation ↓ New Jersey Groundwater Recharge Spreadsheet Version 2.0 November 2003 This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.

Project Name Description Analysis Date BMP or LID Type Recharge BMP Input Parameters Root Zone Water capacity Calculated Parameters Recharge Design Parameters Parameter Symbol Value Unit Parameter Symbol Value Unit Parameter Symbol Value Unit BMP Area ABMP 5404.7 sq.ft Empty Portion of RWC under Post-D Natural Recharge ERWC 0.61 in Inches of Runoff to capture Qdesign 1.84 in BMP Effective Depth, this is the design variable dBMP 3.6 in ERWC Modified to consider dEXC EDRWC 0.00 in Inches of Rainfall to capture Pdesign 2.07 in Upper level of the BMP surface (negative if above ground) dBMPu 108.0 in Empty Portion of RWC under Infilt. BMP RERWC 0.00 in Recharge Provided Avg. over Imp. Area 36.5 in Depth of lower surface of BMP, must be>=dBMPu dEXC 117.0 in Runoff Captured Avg. over imp. Area 36.5 in Post-development Land Segment Location of BMP , Input Zero if Location is distributed or undetermined SegBMP 2 unitless BMP Calculated Size Parameters CALCULATION CHECK MESSAGES ABMP/Aimp Aratio 0.48 unitless Volume Balance-> Solve Problem to satisfy Annual Recharge BMP Volume VBMP 1,621 cu.ft dBMP Check---> OK Parameters from Annual Recharge Worksheet System Performance Calculated Parameters dEXC Check---> OK Post-D Deficit Recharge (or desired recharge volume) Vdef 28,650 cu.ft Annual BMP Recharge Volume 34,489 cu.ft BMP Location---> OK Post-D Impervious Area (or target Impervious Area) Aimp 11,326 sq.ft Avg BMP Recharge Efficiency 100.0% Represents % Infiltration Recharged OTHER NOTES Root Zone Water Capacity RWC 3.69 in %Rainfall became Runoff 78.5% % Pdesign is accurate only after BMP dimensions are updated to make rech volume= deficit volume. The portion RWC Modified to consider dEXC DRWC 0.00 in %Runoff Infiltrated 95.0% % of BMP infiltration prior to filling and the area occupied by BMP are ignored in these calculations. Results are Climatic Factor C-factor 1.67 no units %Runoff Recharged 29.2% % sensetive to dBMP, make sure dBMP selected is small enough for BMP to empty in less than 3 days. For land Average Annual P Pavg 49.0 in %Rainfall Recharged 22.9% % Segment Location of BMP if you select "impervious areas" RWC will be minimal but not zero as determined by Recharge Requirement over Imp. Area dr 9.3 in the 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

by Recharge Requirement over Imp. Area dr 9.3 in the 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 default the spreadsheet assigns the values of total deficit recharge volume "Vdef" 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 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 clik the "Default Vdef & Aimp" button. 11/18/24Waymaker Proposed Site Improvements Subsurface Infiltration Basin This document was created by an application that isn’t licensed to use novaPDF. Purchase a license to generate PDF files without this notice.