250701_42 ERW_Stormwater Report

Engineering & Design USDA Classification System 100 %, fa) g “De _% Ko) silty clay clay loam \ loam © $ 10 fox silt loam S ey silt S o a 4S2B8GEEBZSEBS percent sand =

40 Eagle Ridge Way PROJECT: TEST PIT: TP-01 PAGE 1 OF 1 LOCATION: West Orange, NJ 300 Tice Blvd., Suite 101, Woodcliff Lake, NJ 07677 GROUNDWATER: DEPTH (ft) N/E At Completion (0 hrs.) N/E DEPTH (ft.) 0 WATER SYMBOL First Encountered DATE GROUND ELEVATION (ft): ELEV. FROM: +/-622 Survey PROJECT NO. 24006174A CONTRACTOR: Grabowski Construction, Inc. EQUIPMENT: Excavator FIELD OBSERVER: FSD CHECKED BY: AHE DATE STARTED 02/18/25 DATE FINISHED 02/18/25 DESCRIPTION 10YR 3/6 Silt Clay Loam, 40% coarse fragments, subangular blocky, friable. (moist) 5 10 120" -10.0 END OF TEST PIT AT 120 INCHES 15 20 25 30 NOTES: Exposed soils at surface. Boulders encountered from the ground surface up to 10 ft below existing grades. Stone backfill encountered at 10 ft below existing grades. Test pit terminated at the request of the general contractor. TEST PIT: TP-01 Perched Water Conditions - Not Encountered Est. Seasonal High Groundwater - Not Detected Form: CED-TP-GeoReport-No Remarks-R2.fdt 3/10/2022 PAGE 1 OF 1 Data File:

40 Eagle Ridge Way PROJECT: TEST PIT: TP-02 PAGE 1 OF 1 LOCATION: West Orange, NJ 300 Tice Blvd., Suite 101, Woodcliff Lake, NJ 07677 GROUNDWATER: DEPTH (ft) N/E At Completion (0 hrs.) N/E DEPTH (ft.) 0 WATER SYMBOL First Encountered DATE GROUND ELEVATION (ft): ELEV. FROM: +/-624 Survey PROJECT NO. 24006174A CONTRACTOR: Grabowski Construction, Inc. EQUIPMENT: Excavator FIELD OBSERVER: FSD CHECKED BY: AHE DATE STARTED 02/18/25 DATE FINISHED 02/18/25 DESCRIPTION 10YR 3/6 Silt Clay Loam, 20% coarse fragments, subangular blocky, friable. (moist) 5 108" 10 -9.0 END OF TEST PIT AT 108 INCHES DUE TO REFUSAL ON BEDROCK 15 20 25 30 NOTES: Exposed soils at surface. TEST PIT: TP-02 Perched Water Conditions - Not Encountered Est. Seasonal High Groundwater - Not Detected Form: CED-TP-GeoReport-No Remarks-R2.fdt 3/10/2022 PAGE 1 OF 1 Data File:

40 Eagle Ridge Way PROJECT: TEST PIT: TP-03 PAGE 1 OF 1 LOCATION: West Orange, NJ 300 Tice Blvd., Suite 101, Woodcliff Lake, NJ 07677 GROUNDWATER: DEPTH (ft) N/E At Completion (0 hrs.) N/E DEPTH (ft.) 0 WATER SYMBOL First Encountered DATE GROUND ELEVATION (ft): ELEV. FROM: +/-625 Survey PROJECT NO. 24006174A CONTRACTOR: Grabowski Construction, Inc. EQUIPMENT: Excavator FIELD OBSERVER: FSD CHECKED BY: AHE DATE STARTED 02/18/25 DATE FINISHED 02/18/25 DESCRIPTION 10YR 3/6 Brown Loamy Sand, 50% coarse fragments, subangular blocky, friable. (moist) 5 66" -5.5 END OF TEST PIT AT 66 INCHES DUE TO REFUSAL ON BEDROCK 10 15 20 25 30 NOTES: Exposed soils at surface. Boulders encountered fom the ground surface to 5.5 ft below existing grades. Single ring infiltration test performed at 3.5 ft below existing grades. TEST PIT: TP-03 Perched Water Conditions - Not Encountered Est. Seasonal High Groundwater - Not Detected Form: CED-TP-GeoReport-No Remarks-R2.fdt 3/10/2022 PAGE 1 OF 1 Data File:

40 Eagle Ridge Way PROJECT: TEST PIT: TP-04 PAGE 1 OF 1 LOCATION: West Orange, NJ 300 Tice Blvd., Suite 101, Woodcliff Lake, NJ 07677 GROUNDWATER: DEPTH (ft) N/E At Completion (0 hrs.) N/E DEPTH (ft.) 0 WATER SYMBOL First Encountered DATE GROUND ELEVATION (ft): ELEV. FROM: +/-622 Survey PROJECT NO. 24006174A CONTRACTOR: Grabowski Construction, Inc. EQUIPMENT: Excavator FIELD OBSERVER: FSD CHECKED BY: AHE DATE STARTED 02/18/25 DATE FINISHED 02/18/25 DESCRIPTION 10YR 3/6 Silt Clay Loam, 40% coarse fragments, blocky, friable. (moist) 5 108" 10 -9.0 END OF TEST PIT AT 108 INCHES DUE TO REFUSAL ON BEDROCK 15 20 25 30 NOTES: Exposed soils at surface Boulders encountered from the ground surface to 9 ft below existing grades. TEST PIT: TP-04 Perched Water Conditions - Not Encountered Est. Seasonal High Groundwater - Not Detected Form: CED-TP-GeoReport-No Remarks-R2.fdt 3/10/2022 PAGE 1 OF 1 Data File:

40 Eagle Ridge Way PROJECT: TEST PIT: TP-05 PAGE 1 OF 1 LOCATION: West Orange, NJ 300 Tice Blvd., Suite 101, Woodcliff Lake, NJ 07677 GROUNDWATER: DEPTH (ft) N/E At Completion (0 hrs.) N/E DEPTH (ft.) 0 WATER SYMBOL First Encountered DATE GROUND ELEVATION (ft): ELEV. FROM: +/-617 Survey PROJECT NO. 24006174A CONTRACTOR: Grabowski Construction, Inc. EQUIPMENT: Excavator FIELD OBSERVER: FSD CHECKED BY: AHE DATE STARTED 02/18/25 DATE FINISHED 02/18/25 DESCRIPTION 10YR 3/6 Silt Loam, 20% coarse fragments, subangular blocky, friable. (moist) 5 10 120" 150" -12.5 15 10YR 6/4 Silt Clay Loam, 0% coarse fragments, subangular blocky, friable. (GLEY1 8/N soil staining)(moist) END OF TEST PIT AT 150 INCHES DUE TO REFUSAL ON BEDROCK 20 25 30 NOTES: Exposed soils at surface. Boulders encountered from the ground surface to 10 ft. below existing grades. TEST PIT: TP-05 Perched Water Conditions - Not Encountered Est. Seasonal High Groundwater - Not Detected Form: CED-TP-GeoReport-No Remarks-R2.fdt 3/10/2022 PAGE 1 OF 1 Data File:

Appendix B In-situ Infiltration Test Result GEOTECHNICAL DATA REPORT | February 27, 2025

Colliers Engineering & Design Project Number: 24006174A Location: TP-03 Page: 1 of 1 Single Ring Infiltration Test Data: Date: 2/18/2025 1. Test No.: TP-03 2. Depth: 42" (3.5 ft) Soil Description: Loamy Sand 3. Presoak: Time Elapsed to Drain Completely (3"): 15 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) 5.7 1 10 37 6.2 2 9 40 6.2 3 9 37 6.2 4 9 40 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): 6.1 2.1 (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 | February 27, 2025

Appendix F Stormwater Conveyance System Conduit Outlet Protection Calculations Stormwater Management Report | October 18, 2024 – Revised December 20, 2024