251203_42 ERW_Stormwater Report

Colliers Engineering & Design Project Number: 24006174A Location: TP-102 Page: 1 of 1 Single Ring Infiltration Test Data: Date: 8/28/2025 1. Test No.: TP-102 2. Depth: 36" (3.0 ft) Soil Description: Silt Clay Loam 3. Presoak: Time Elapsed to Drain Completely (3"): 1 min 4. Rate of Fall Data For 1" Drop: (Min. of 3 Meas. & Elapsed Time has Stabilized; min. 2 consecutive meas. within 5 sec.) Elapsed Time Observed Field Intake Rate Meas. # (min) (sec) (in/hr) 1 2 0 30.0 2 2 0 30.0 30.0 3 2 0 If 2 consecutive meas. are >60 min, the test is ended & Observed Field Intake Rate is <1 in/hr. 5. Conversion to Hydraulic Conductivity (per chart below): a. Average Stabilized Observed Field Intake Rate (in/hr): b. Soil Hydraulic Conductivity (in/hr): 30.0 10.3 (5a. x 0.3424 = 5b.) Source: New Jersey Stormwater Best Management Practices Manual, Chapter 12: Soil Testing Criteria, pg. 47, (April 2022). Notes: Test performed in 6" dia. metal ring with height of 6", set 3" into undisturbed soil layer.

Colliers Engineering & Design is a trusted provider of multi-discipline engineering, design and consulting services providing customized solutions for public and private clients through a network of offices nationwide. For a full listing of our office locations, please visit colliersengineering.com 1 877 627 3772 Civil/Site • Traffic/Transportation • Governmental • Survey/Geospatial Infrastructure • Geotechnical/Environmental • Telecommunications • Utilities/Energy GEOTECHNICAL DATA REPORT | November 25, 2025

Appendix F Stormwater Conveyance System HydroCAD Output – Failure Condition Conduit Outlet Protection Calculations Stormwater Management Report | October 18, 2024 – Last Revised December 3, 2025

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PR 1B-I PR 1B-P PR 2-P 10R PR 1A-P 1P DP2-PR BASIN - FAILURE DP1-PR Subcat Reach Pond Link Routing Diagram for 251202_42 ERW Waystone - Future Rainfall Prepared by Colliers Engineering & Design, Printed 12/3/2025 HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC

251202_42 ERW Waystone - Future Rainfall Prepared by Colliers Engineering & Design HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Area Listing (selected nodes) Area (acres) CN Description (subcatchment-numbers) 1.539 0.705 0.355 0.492 3.092 74 89 98 98 84 >75% Grass cover, Good, HSG C (PR 1A-P, PR 1B-P, PR 2-P) Gravel roads, HSG C (PR 1A-P, PR 1B-P, PR 2-P) Paved parking, HSG C (PR 1B-I) Roofs, HSG C (PR 1B-I) TOTAL AREA Printed 12/3/2025 Page 2

251202_42 ERW Waystone - Future Rainfall Prepared by Colliers Engineering & Design HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Soil Listing (selected nodes) Area (acres) Soil Group Subcatchment Numbers 0.000 0.000 3.092 0.000 0.000 3.092 HSG A HSG B HSG C HSG D Other PR 1A-P, PR 1B-I, PR 1B-P, PR 2-P TOTAL AREA Printed 12/3/2025 Page 3

251202_42 ERW Waystone - Future Rainfall NOAA 24-hr D 25-Year Rainfall=6.44" Prepared by Colliers Engineering & Design HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Printed 12/3/2025 Page 4 Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment PR 1A-P: Runoff Area=13,167 sf 0.00% Impervious Runoff Depth=3.97" Flow Length=203' Tc=5.9 min CN=78 Runoff=1.36 cfs 0.100 af Subcatchment PR 1B-I: Runoff Area=36,906 sf 100.00% Impervious Runoff Depth=6.20" Flow Length=136' Tc=1.5 min CN=98 Runoff=5.73 cfs 0.438 af Subcatchment PR 1B-P: Runoff Area=77,195 sf 0.00% Impervious Runoff Depth=4.07" Flow Length=195' Tc=7.7 min CN=79 Runoff=7.74 cfs 0.602 af Subcatchment PR 2-P: Runoff Area=7,405 sf 0.00% Impervious Runoff Depth=3.76" Flow Length=84' Slope=0.0833 '/' Tc=4.6 min CN=76 Runoff=0.76 cfs 0.053 af Reach 10R: Inflow=11.97 cfs 1.040 af Outflow=11.97 cfs 1.040 af Reach DP1-PR: Inflow=6.11 cfs 1.069 af Outflow=6.11 cfs 1.069 af Reach DP2-PR: Inflow=0.76 cfs 0.053 af Outflow=0.76 cfs 0.053 af Pond 1P: BASIN - FAILURE Peak Elev=17.80' Storage=0.332 af Inflow=11.97 cfs 1.040 af Outflow=5.27 cfs 0.969 af Total Runoff Area = 3.092 ac Runoff Volume = 1.193 af Average Runoff Depth = 4.63" 72.60% Pervious = 2.244 ac 27.40% Impervious = 0.847 ac

NOAA 24-hr D 25-Year Rainfall=6.44" 251202_42 ERW Waystone - Future Rainfall Prepared by Colliers Engineering & Design HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Printed 12/3/2025 Page 5 Summary for Subcatchment PR 1A-P: Runoff = 1.36 cfs @ 12.13 hrs, Volume= Routed to Reach DP1-PR : 0.100 af, Depth= 3.97" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hr D 25-Year Rainfall=6.44" Area (sf) 9,975 3,192 13,167 13,167 CN 74 89 78 Description >75% Grass cover, Good, HSG C Gravel roads, HSG C Weighted Average 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.6 100 0.0725 0.30 Sheet Flow, Grass: Short n= 0.150 P2= 3.44" 0.3 103 0.1090 5.32 Shallow Concentrated Flow, Unpaved Kv= 16.1 fps 5.9 203 Total Subcatchment PR 1A-P: Hydrograph Runoff 1.36 cfs NOAA 24-hr D 25-Year Rainfall=6.44" Runoff Area=13,167 sf Runoff Volume=0.100 af Runoff Depth=3.97" Flow Length=203' Tc=5.9 min CN=78 Flow (cfs) 1 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours)

251202_42 ERW Waystone - Future Rainfall NOAA 24-hr D 25-Year Rainfall=6.44" Prepared by Colliers Engineering & Design HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment PR 1A-P: Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 1.00 0.07 0.00 2.00 0.15 0.00 3.00 0.24 0.00 4.00 0.34 0.00 5.00 0.44 0.00 6.00 0.55 0.00 7.00 0.68 0.00 8.00 0.84 0.02 9.00 1.02 0.06 10.00 1.28 0.14 11.00 1.67 0.31 12.00 3.09 1.19 13.00 4.77 2.51 14.00 5.16 2.85 15.00 5.42 3.07 16.00 5.60 3.23 17.00 5.76 3.37 18.00 5.89 3.48 19.00 6.00 3.58 20.00 6.10 3.67 21.00 6.20 3.75 22.00 6.29 3.83 23.00 6.37 3.90 24.00 6.44 3.97 25.00 6.44 3.97 26.00 6.44 3.97 27.00 6.44 3.97 28.00 6.44 3.97 29.00 6.44 3.97 30.00 6.44 3.97 31.00 6.44 3.97 32.00 6.44 3.97 33.00 6.44 3.97 34.00 6.44 3.97 35.00 6.44 3.97 36.00 6.44 3.97 37.00 6.44 3.97 38.00 6.44 3.97 39.00 6.44 3.97 40.00 6.44 3.97 41.00 6.44 3.97 42.00 6.44 3.97 43.00 6.44 3.97 44.00 6.44 3.97 45.00 6.44 3.97 46.00 6.44 3.97 47.00 6.44 3.97 48.00 6.44 3.97 49.00 6.44 3.97 50.00 6.44 3.97 51.00 6.44 3.97 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.03 0.08 0.71 0.16 0.08 0.06 0.05 0.04 0.03 0.03 0.03 0.03 0.02 0.02 0.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time Precip. Excess (hours) (inches) (inches) 52.00 6.44 3.97 53.00 6.44 3.97 54.00 6.44 3.97 55.00 6.44 3.97 56.00 6.44 3.97 57.00 6.44 3.97 58.00 6.44 3.97 59.00 6.44 3.97 60.00 6.44 3.97 61.00 6.44 3.97 62.00 6.44 3.97 63.00 6.44 3.97 64.00 6.44 3.97 65.00 6.44 3.97 66.00 6.44 3.97 67.00 6.44 3.97 68.00 6.44 3.97 69.00 6.44 3.97 70.00 6.44 3.97 71.00 6.44 3.97 72.00 6.44 3.97 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Printed 12/3/2025 Page 6