Geotechnical Engineering Report Addendum No 1 Results of Testing 01 29 2025 submission

Soil Profile Report Project Name/#: Mavis #2296 - Additional Infiltration Testing Municipality: West Orange Project Location: 460 Prospect Avenue Block/Lot: Block: 105 Lot: 64.01 Driller: Sano Drilling Inspector: Maddie Trudnak / ECS Date of Observation: 1/14/2025 Lowest point in BMP (ft) = - Prepared by: JCY Maximum Impounded Water Depth (ft) = - Required Soil Profile Depth (ft) = 8.0 Exploration ID: TP-02 Elevation (ft) Existing Ground Level: 619.0 Elevations are approximate and based on Google Earth©. Proposed SWM Basin Bottom Level: - Seasonal High Water Table: - Termination: 611.0 Mark Most Top Elevation/Bottom Observed Water Table Soil Morphological USDA Soil Texture Hydraulically Elevation Elevation Note Observations Restrictive (ft.) (ft.) 10 YR 4/2 dark grayish Silt Loam 619.0/618.75 brown, moist, blocky, Topsoil, Fill hard

oist, blocky, Topsoil, Fill hard 7.5 YR 4/4 brown, Loamy Silt x 618.75/615.75 moist, blocky, very Fill, contains brick friable 5 YR 3/3 dark reddish Infiltration Test SANDY LOAM 615.75/611.0 Not encountered brown, moist, single at 615.0 grain, loose, 10% gravel

Soil Profile Report Project Name/#: Mavis #2296 - Additional Infiltration Testing Municipality: West Orange Project Location: 460 Prospect Avenue Block/Lot: Block: 105 Lot: 64.01 Driller: Sano Drilling Inspector: Maddie Trudnak / ECS Date of Observation: 1/14/2025 Lowest point in BMP (ft) = - Prepared by: JCY Maximum Impounded Water Depth (ft) = - Required Soil Profile Depth (ft) = 8.5 Exploration ID: TP-03 Elevation (ft) Existing Ground Level: 619.0 Elevations are approximate and based on Google Earth©. Proposed SWM Basin Bottom Level: - Seasonal High Water Table: - Termination: 610.5 Mark Most Top Elevation/Bottom Observed Water Table Soil Morphological USDA Soil Texture Hydraulically Elevation Elevation Note Observations Restrictive (ft.) (ft.) 10 YR 4/2 dark grayish Loamy Silt 619.0/618.5 brown, moist, blocky, Topsoil, contains roots loose

, moist, blocky, Topsoil, contains roots loose 10 YR 3/2 very dark grayish brown, moist, Fill, plastic sprinkler Silt Loam x 618.5/616.0 blocky, friable, 10% system gravel 5 YR 3/3 dark reddish brown, moist, single Sandy Silt 616.0/610.5 Not encountered Bucket refusal @ 8.5' bgs grain & blocky, loose, 50% gravel

Soil Profile Report Project Name/#: Mavis #2296 - Additional Infiltration Testing Municipality: West Orange Project Location: 460 Prospect Avenue Block/Lot: Block: 105 Lot: 64.01 Driller: Sano Drilling Inspector: Maddie Trudnak / ECS Date of Observation: 1/14/2025 Lowest point in BMP (ft) = - Prepared by: JCY Maximum Impounded Water Depth (ft) = - Required Soil Profile Depth (ft) = 12.0 Exploration ID: TP-04 Elevation (ft) Existing Ground Level: 618.0 Elevations are approximate and based on Google Earth©. Proposed SWM Basin Bottom Level: - Seasonal High Water Table: - Termination: 606.0 Mark Most Top Elevation/Bottom Observed Water Table Soil Morphological USDA Soil Texture Hydraulically Elevation Elevation Note Observations Restrictive (ft.) (ft.) 10 YR 3/2 very dark Silt Loam 618.0/617.7 grayish brown, moist, Topsoil blocky, loose

, moist, Topsoil blocky, loose 7.5 YR 5/4 brown, Sandy Loam 617.7/617.4 moist, blocky, loose, 5% Fill gravel 2.5Y 5/1 gray, moist, Fill, contains glass Silty Loam 617.4/617.0 blocky, loose, 90% bottles gravel 7.5 YR 3/1 very dark Clay Loam x 617.0/615.0 gray, moist, blocky, friable, 20% gravel 5 YR 3/3 dark reddish Sandy Silt 615.0/606.0 Not encountered brown, moist, single grain, loose, 40% gravel

Soil Profile Report Project Name/#: Mavis #2296 - Additional Infiltration Testing Municipality: West Orange Project Location: 460 Prospect Avenue Block/Lot: Block: 105 Lot: 64.01 Driller: Sano Drilling Inspector: Maddie Trudnak / ECS Date of Observation: 1/14/2025 Lowest point in BMP (ft) = - Prepared by: JCY Maximum Impounded Water Depth (ft) = - Required Soil Profile Depth (ft) = 9.0 Exploration ID: TP-05 Elevation (ft) Existing Ground Level: 616.0 Elevations are approximate and based on Google Earth©. Proposed SWM Basin Bottom Level: - Seasonal High Water Table: - Termination: 607.0 Mark Most Top Elevation/Bottom Observed Water Table Soil Morphological USDA Soil Texture Hydraulically Elevation Elevation Note Observations Restrictive (ft.) (ft.) Asphalt 616.0/615.2 10YR 6/2 light brownish Sandy Loam 615.2/615.0 Subgrade

615.2/615.0 Subgrade gray, moist, 90% gravel 10YR 5/1 gray, moist, Fill, contains brick, Sandy Loam 615.0/613.0 blocky & single grain, plastic, cobbles loose, 30% gravel 5YR 3/3 dark reddish brown, moist, blocky, Silty Clay Loam x 613.0/607.0 Not encountered Bucket refusal @ 9.0' bgs friable, 30% gravel and cobbles

Single Ring Infiltrometer Test Log ECS Project No.: 44:2100-A Project Location: 460 Prospect Avenue Project Name: Mavis #2296 Infiltration Testing - West Orange Township: West Orange Block/Lot: Testing per New Jersey Stormwater Best Management Practices Manual, Chapter 12, Subsection A5 (April 2022) TEST ID: TP-01A Soil Layer Classification: Sandy Loam Infiltration Test Elev.: 615.0 Date: 1/14/2025 Converted Water Level Field Recorded Calculated Time Per Field Observed Field Observed Averaged Hydraulic Water Trial Hydraulic MM SS .ss Drop Time 1-inch Water Level Drop Intake Rate Intake Rate Conductivity Rate Level Drop # Conductivity (in) (MM:SS.ss) (MM.mm) (inches/min) (inches/hr) (inches/hr) (inches/hr) 0.13 60 00 00 1 0.1 60:00.00 60.00 0.0021 0.13 0.04 0.13 60 00 00 2 0.1 60:00.00 60.00 0.0021 0.13 0.04

0.0021 0.13 0.04 0.04 0.13 60 00 00 3 0.1 60:00.00 60.00 0.0021 0.13 0.04 0.13 60 00 00 4 0.1 60:00.00 60.00 0.0021 0.13 0.04 TEST ID: TP-02A Soil Layer Classification: Sandy Loam Infiltration Test Elev.: 615.0 Date: 1/14/2025 Converted Water Level Field Recorded Calculated Time Per Field Observed Field Observed Averaged Hydraulic Water Trial Hydraulic MM SS .ss Drop Time 1-inch Water Level Drop Intake Rate Intake Rate Conductivity Rate Level Drop # Conductivity (in) (MM:SS.ss) (MM.mm) (inches/min) (inches/hr) (inches/hr) (inches/hr) 1.00 28 00 00 1 1.0 28:00.00 28.00 0.0357 2.14 0.73 1.00 53 46 00 2 1.0 53:46.00 53.77 0.0186 1.12 0.38