241018_42 ERW_Stormwater Report_compiled

NJ DEP 2-hr WQ Rainfall=1.25"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 71HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Pond Basin 1: (new Pond) Inflow Primary Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 2 1 0 Inflow Area=1.926 ac Peak Elev=13.80' Storage=0.067 af 1.82 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.

NJ DEP 2-hr WQ Rainfall=1.25"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 72HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Summary for Pond Basin 2: (new Pond) Inflow Area = 0.693 ac, 38.96% Impervious, Inflow Depth = 0.48" for WQ event Inflow = 0.85 cfs @ 1.03 hrs, Volume= 0.028 af Outflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 100%, Lag= 0.0 min Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routed to Reach DP1-P : (new Reach) Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 15.38' @ 2.45 hrs Surf.Area= 0.031 ac Storage= 0.028 af Plug-Flow detention time= (not calculated: initial storage exceeds outflow) Center-of-Mass det. time= (not calculated: no outflow) Volume Invert Avail.Storage Storage Description #1A 14.00' 0.029 af 34.75'W x 39.22'L x 3.50'H Field A 0.109 af Overall - 0.037 af Embedded = 0.073 af x 40.0% Voids #2A 14.50' 0.037 af ADS_StormTech SC-740 +Cap x 35 Inside #1 Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap 35 Chambers in 7 Rows 0.066 af Total Available Storage Storage Group A created with Chamber Wizard Device Routing Invert Outlet Devices #1 Primary 15.40' 2.5" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads #2 Primary 16.30' 6.0" Vert. Orifice/Grate X 2.00 C= 0.600 Limited to weir flow at low heads #3 Primary 17.05' 3.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=14.00' (Free Discharge) 1=Orifice/Grate ( Controls 0.00 cfs) 2=Orifice/Grate ( Controls 0.00 cfs) 3=Sharp-Crested Rectangular Weir ( Controls 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.

NJ DEP 2-hr WQ Rainfall=1.25"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 73HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Pond Basin 2: (new Pond) - Chamber Wizard Field A Chamber Model = ADS_StormTech SC-740 +Cap (ADS StormTech® SC-740 with cap length) Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cf Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap 51.0" Wide + 6.0" Spacing = 57.0" C-C Row Spacing 5 Chambers/Row x 7.12' Long +0.81' Cap Length x 2 = 37.22' Row Length +12.0" End Stone x 2 = 39.22' Base Length 7 Rows x 51.0" Wide + 6.0" Spacing x 6 + 12.0" Side Stone x 2 = 34.75' Base Width 6.0" Stone Base + 30.0" Chamber Height + 6.0" Stone Cover = 3.50' Field Height 35 Chambers x 45.9 cf = 1,607.9 cf Chamber Storage 4,769.7 cf Field - 1,607.9 cf Chambers = 3,161.8 cf Stone x 40.0% Voids = 1,264.7 cf Stone Storage Chamber Storage + Stone Storage = 2,872.6 cf = 0.066 af Overall Storage Efficiency = 60.2% Overall System Size = 39.22' x 34.75' x 3.50' 35 Chambers 176.7 cy Field 117.1 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"240924_42 ERW Waymaker Printed 10/17/2024Prepared by Colliers Engineering & Design Page 74HydroCAD® 10.20-4b s/n 04431 © 2023 HydroCAD Software Solutions LLC Pond Basin 2: (new Pond) Inflow Primary Hydrograph Time (hours) 727068666462605856545250484644424038363432302826242220181614121086420 Flow (cfs) 0.95 0.9 0.85 0.8 0.75 0.7 0.65 0.6 0.55 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 Inflow Area=0.693 ac Peak Elev=15.38' Storage=0.028 af 0.85 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 | October 18, 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: 10/17/24 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 1.167 Impervious areas Boonton 0.0 - 2 2.773 Open space Boonton 14.9 150,467 2 1.451 Open space Boonton 14.9 78,734 3 Gravel, dirt Boonton - - 3 0.474 Gravel, dirt Boonton 6.9 11,787 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 8.1 90,520 Procedure to fill the Pre-Development and Post-Development Conditions Tables % of Pre-Developed Annual Recharge to Preserve = 100% Total Impervious Area (sq.ft) 50,835 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= 59,947 (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= 3.50 (in) DRWC= 0.00 (in) Soil type for impervious areas are only required if an infiltration facility will be built within these areas. ERWC = 0.58 (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 = 0.58 (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 5263.0 sq.ft Empty Portion of RWC under Post-D Natural Recharge ERWC 0.61 in Inches of Runoff to capture Qdesign 0.30 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 0.39 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 17.4 in Depth of lower surface of BMP, must be>=dBMPu dEXC 117.0 in Runoff Captured Avg. over imp. Area 17.4 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 0.46 unitless Volume Balance-> Solve Problem to satisfy Annual Recharge BMP Volume VBMP 1,579 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 7,121 cu.ft Annual BMP Recharge Volume 63,423 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 174.7% % 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 38.9% % 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 30.6% % 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 1.7 in the soil type and a shallow root zone for this Land Cover allowing consideration of lateral flow and other losses. Waymaker Proposed Site Improvements

by Recharge Requirement over Imp. Area dr 1.7 in the soil type and a shallow root zone for this Land Cover allowing consideration of lateral flow and other losses. Waymaker Proposed Site Improvements 10/17/24 Subsurface Infiltration Basin 1 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. 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 1363.0 sq.ft Empty Portion of RWC under Post-D Natural Recharge ERWC 0.61 in Inches of Runoff to capture Qdesign 0.30 in BMP Effective Depth, this is the design variable dBMP 2.4 in ERWC Modified to consider dEXC EDRWC 0.00 in Inches of Rainfall to capture Pdesign 0.39 in Upper level of the BMP surface (negative if above ground) dBMPu 60.0 in Empty Portion of RWC under Infilt. BMP RERWC 0.00 in Recharge Provided Avg. over Imp. Area 17.4 in Depth of lower surface of BMP, must be>=dBMPu dEXC 66.0 in Runoff Captured Avg. over imp. Area 17.4 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 0.12 unitless Volume Balance-> Solve Problem to satisfy Annual Recharge BMP Volume VBMP 273 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 7,121 cu.ft Annual BMP Recharge Volume 16,425 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 45.2% % 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 10.1% % 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 7.9% % 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 1.7 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: