J_2024 05 09_West Orange Stormwater Management Plan

January 17, 2023 File No. 26.0092704.00 PSE&G – West Orange Station Page 3 Other than the thin (1’) sandy layer directly above the bedrock in Test Pit 201, all other soil permeability tests were in relatively fine grained soils and indicated very slow permeability rates and are considered restrictive and not conducive to infiltration. Note that a single ring and laboratory tube permeameter test performed Proactive by Design in Test Pit 201 at a depth of 4 feet were omitted as the results did not appear consistent with the loam soils encountered at this level and appeared to be in disturbed materials. Based on the results of the additional testing, it does not appear that the natural soils above the rock are conducive to infiltration. The following Plates are attached and complete this report addendum: Plate 1 - Plot Plan Plates 2A through 2E - Logs of Test Pits Respectfully submitted, GZA GeoEnvironmental, Inc. Christopher D. McLaughlin, P.E. Senior Project Manager Robert E. Schwankert, P.E. Consultant/Reviewer CDM:MRD/cdm (1 copy submitted via email) An Equal Opportunity Employer M/F/V/H Mark R. Denno, P.E. Principal

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TEST PIT LOG Engineers and Scientists PSE&G West Orange, NJ EXPLORATION NO.: TP-201 SHEET: 1 of 1 PROJECT NO: 26.0092704.00 REVIEWED BY: Chris McLaughlin Logged By: Alex Avelar Test Pit Location: See Plan Final Test Pit Depth (ft.): 6 Contractor: Furino and Sons, Inc. Operator: Matt Ground Surface Elev. (ft.): +605 Date Start - Finish: 1/6/2023 - 1/6/2023 Type of Excavator: Track Excavator Date Excavator Model: Depth (ft) Sample No. CAT 305E Sample Depth (ft.) 1/6/23 Stratum Depth (in.) 0-4 1 S1, T1 1.5 4-24 2 7 8 9 10 4" of 3/4" Clean gravel Fill - Dark yellowish brown (10YR, 3/4) loam, 15% gravel, moderate medium crumb, moist, cemented, abrupt smooth boundary, few fine to medium roots 60-72 S3, T3 6 Water Depth Content (ft) (%) 1 2 3 4 4 5 6 Sample Description and Identification 24-60 S2, T2 Stab.Time 6 Yellowish brown (10YR, 5/6) loam, 15% gravel, 15% cobbles, moderate medium crumb, moist, cemented, gradual smooth boundary 3 4 Groundwater Depth (ft.) Time Water Depth Dark yellowish brown (7.5YR, 4/4) loamy sand, 20% gravel, moderate medium crumb, moist, friable, few fine faint light gray (10YR, 7/2) mottles encountered throughout layer Excavator refusal atop basalt rock at 6' End of exploration at 6 feet. Isolated groundwater seepage encountered @ 6' 5 6 Single ring attempted @ 4' however soils appeared disturbed and test results were not considered to be representative of the natural soils. Tube Permeameter Test Results: <0.06 in/hr @ 1.5' >20 in/hr @ 6' 11 12 14 15 REMARKS 3B - MTA TEST PIT USDA; 1/17/2023; 10:21:02 AM 13 See Log Key for exploration of sample description and identification procedures. Stratification lines represent approximate boundaries between soil and bedrock types. Actual transitions may be gradual. Water level readings have been made at the times and under the conditions stated. Fluctuations of groundwater may occur due to other factors than those present at the times the measurements were made. Plate No.: 2A Remark GZA GeoEnvironmental, Inc.

TEST PIT LOG Engineers and Scientists PSE&G West Orange, NJ EXPLORATION NO.: TP-202 SHEET: 1 of 1 PROJECT NO: 26.0092704.00 REVIEWED BY: Chris McLaughlin Logged By: Alex Avelar Test Pit Location: See Plan Final Test Pit Depth (ft.): 10 Contractor: Furino and Sons, Inc. Operator: Matt Ground Surface Elev. (ft.): +606 Date Start - Finish: 1/5/2023 - 1/5/2023 Type of Excavator: Track Excavator Date Excavator Model: Depth (ft) Sample No. CAT 305E Sample Depth (ft.) 1/5/23 Stratum Depth (in.) 0-1 1 S1, T1 1.5 1-24 2 S2, T2 4 Sample Description and Identification 1" of Leaf litter and topsoil Reddish brown (5YR, 4/3) sandy clay loam, 10% gravel, moderate medium crumb, moist, friable, clear smooth boundary, few fine roots Reddish brown (5YR, 4/3) clay, 10% gravel, 5% cobbles, moderate medium subangular blocky, moist, firm 7 S3, T3 8 12 3 6 7 9 Excavator refusal atop basalt rock at 10' End of exploration at 10 feet. Groundwater not encountered 10 Single Ring Permeability Test Results: Failed to drain during presoak = <0.06 in/hr @ 4 ft. Tube Permeameter Test Results: 0.2 in/hr @ 1.5' <0.06 in/hr @ 4' 14 15 REMARKS 3B - MTA TEST PIT USDA; 1/17/2023; 10:21:02 AM 13 2 8 78-120 9 11 1 5 6 10 Water Depth Content (ft) (%) 4 24-78 5 8 Stab.Time NE Reddish brown (5YR, 4/3) clay loam, 15% gravel, moderate medium subangular blocky, moist, friable, gradual smooth boundary 3 4 Groundwater Depth (ft.) Time Water Depth See Log Key for exploration of sample description and identification procedures. Stratification lines represent approximate boundaries between soil and bedrock types. Actual transitions may be gradual. Water level readings have been made at the times and under the conditions stated. Fluctuations of groundwater may occur due to other factors than those present at the times the measurements were made. Plate No.: 2B Remark GZA GeoEnvironmental, Inc.

TEST PIT LOG Engineers and Scientists PSE&G West Orange, NJ EXPLORATION NO.: TP-203 SHEET: 1 of 1 PROJECT NO: 26.0092704.00 REVIEWED BY: Chris McLaughlin Logged By: Alex Avelar Test Pit Location: See Plan Final Test Pit Depth (ft.): 10 Contractor: Furino and Sons, Inc. Operator: Matt Ground Surface Elev. (ft.): +605 Date Start - Finish: 1/5/2023 - 1/5/2023 Type of Excavator: Track Excavator Date Excavator Model: Depth (ft) Sample No. CAT 305E Sample Depth (ft.) 1/5/23 Stratum Depth (in.) 0-2 1 2-32 2 S1, T1 Groundwater Depth (ft.) Time Water Depth Sample Description and Identification 2" of Leaf litter and topsoil Dark reddish brown (5YR, 3/4) silt loam, 15% gravel, moderate medium crumb, moist, friable, clear smooth boundary, few fine to medium roots 3 S2, T2 4 5 S3, T3 5 32-60 Reddish brown (2.5YR, 4/3) silty clay loam, 10% gravel, 5% cobbles, moderate medium subangular blocky, wet, friable, clear smooth boundary Reddish brown (2.5YR, 4/3) clay, 10% gravel, 5% cobbles, massive, wet, friable 6 7 8 11 12 3 4 5 6 60-120 8 9 Excavator refusal atop basalt rock at 10' End of exploration at 10 feet. Groundwater not encountered 10 Single Ring Permeability Test Results: Failed to drain during presoak = <0.06 in/hr @ 4 ft. Tube Permeameter Test Results: 0.2 in/hr @ 2' 0.1 in/hr @ 5' 14 15 REMARKS 3B - MTA TEST PIT USDA; 1/17/2023; 10:21:03 AM 13 1 7 9 10 Water Depth Content (ft) (%) 2 2 4 Stab.Time NE See Log Key for exploration of sample description and identification procedures. Stratification lines represent approximate boundaries between soil and bedrock types. Actual transitions may be gradual. Water level readings have been made at the times and under the conditions stated. Fluctuations of groundwater may occur due to other factors than those present at the times the measurements were made. Plate No.: 2C Remark GZA GeoEnvironmental, Inc.

TEST PIT LOG Engineers and Scientists PSE&G West Orange, NJ EXPLORATION NO.: TP-204 SHEET: 1 of 1 PROJECT NO: 26.0092704.00 REVIEWED BY: Chris McLaughlin Logged By: Alex Avelar Test Pit Location: See Plan Final Test Pit Depth (ft.): 8 Contractor: Furino and Sons, Inc. Operator: Matt Ground Surface Elev. (ft.): +604 Date Start - Finish: 1/4/2023 - 1/4/2023 Type of Excavator: Track Excavator Date Excavator Model: Depth (ft) CAT 305E 1/4/23 Sample No. Sample Depth (ft.) Stratum Depth (in.) S1, T1 0.5 0-2 2-8 1 2 8-41 3 S2, T2 3 4 S3, T3 4 Groundwater Depth (ft.) Time Water Depth Stab.Time 7 Sample Description and Identification 2" of Leaf litter and topsoil Fill - Reddish brown (5YR, 4/3) sandy clay loam, 25% gravel, moderate medium crumb, moist, firm, abrupt irregular boundary, few fine to medium roots Topsoil/Fill - Dark brown (7.5YR, 3/3) loam, 15% gravel, moderate medium crumb, moist, friable, common fine to medium roots Water Depth Content (ft) (%) 1 2 3 Reddish brown (5YR, 4/4) silt loam, 15% gravel, moderate medium crumb, wet, friable, abrupt wavy boundary 4 41-66 5 6 5 S4, T4 66-96 7 8 9 10 11 12 Reddish brown (5YR, 4/3) clay loam, 15% gravel, moderate medium crumb, wet, friable 6 S5, T5 8 6 7 - excavator refusal atop boulder or possible basalt bedrock @ 8 ft. End of exploration at 8 feet. Rapid groundwater seepage encountered @ 7' 8 Single Ring Permeability Test Results: Failed to drain during presoak = <0.06 in/hr @ 4 ft. Tube Permeameter Test Results: <0.06 in/hr @ 4' <0.06 in/hr @ 6' <0.06 in/hr @ 8' 14 15 REMARKS 3B - MTA TEST PIT USDA; 1/17/2023; 10:21:03 AM 13 See Log Key for exploration of sample description and identification procedures. Stratification lines represent approximate boundaries between soil and bedrock types. Actual transitions may be gradual. Water level readings have been made at the times and under the conditions stated. Fluctuations of groundwater may occur due to other factors than those present at the times the measurements were made. Plate No.: 2D Remark GZA GeoEnvironmental, Inc.

TEST PIT LOG Engineers and Scientists PSE&G West Orange, NJ Logged By: Alex Avelar Test Pit Location: See Plan Final Test Pit Depth (ft.): 10 Contractor: Furino and Sons, Inc. Operator: Matt Ground Surface Elev. (ft.): +603 Date Start - Finish: 1/4/2023 - 1/4/2023 Type of Excavator: Track Excavator Date Excavator Model: Depth (ft) Sample No. CAT 305E Sample Depth (ft.) Stratum Depth (in.) 1 2 3-32 S1, T1 2 4 S2, T2 4 5 S3, T3 5 10 11 12 13 14 Topsoil/Fill - Dark yellowish brown (10YR, 3/6) loam, 5% gravel, moderate medium crumb, moist, friable, clear, common fine to medium roots Fill - Brown (7.5YR, 4/4) silty clay loam, 15% gravel, moderate medium subangular blocky, moist, friable, abrupt irregular boundary, few fine roots 32-53 S4, T4 7 Water Depth Content (ft) (%) 1 2 3 4 Brown (2.5YR, 4/3) loam, 15% gravel, moderate medium crumb, friable 5 6 Reddish brown (5YR, 4/4) clay loam, 15% gravel, moderate medium subangular blocky, moist, friable 8 9 Sample Description and Identification 53-84 6 Stab.Time NE Topsoil/Fill - Dark brown (7.5YR, 3/4) silt loam, 10% gravel, massive, wet, friable, clear irregular boundary 3 7 Groundwater Depth (ft.) Time Water Depth 1/4/23 0-3 84-120 7 8 9 End of exploration at 10 feet. Groundwater not encountered 10 Single Ring Permeability Test Results: Failed to drain during presoak = <0.06 in/hr @ 3.7 ft. Failed to drain during presoak = <0.06 in/hr @ 5 ft. Tube Permeameter Test Results: <0.06 in/hr @ 4' <0.06 in/hr @ 7' 15 REMARKS 3B - MTA TEST PIT USDA; 1/17/2023; 10:21:04 AM EXPLORATION NO.: TP-205 SHEET: 1 of 1 PROJECT NO: 26.0092704.00 REVIEWED BY: Chris McLaughlin See Log Key for exploration of sample description and identification procedures. Stratification lines represent approximate boundaries between soil and bedrock types. Actual transitions may be gradual. Water level readings have been made at the times and under the conditions stated. Fluctuations of groundwater may occur due to other factors than those present at the times the measurements were made. Plate No.: 2E Remark GZA GeoEnvironmental, Inc.

SUBSURFACE INVESTIGATION WEST ORANGE SWITCHING STATION LIFECYCLE PROJECT West Orange, Essex County, New Jersey PSE&G August 8, 2022 File No. 26.0092704.00 PREPARED FOR: PSE&G 80 Park Plaza Newark, NJ 07101 GZA GeoEnvironmental Inc. 117 Canal Road │ South Bound Brook, NJ 08880 732-356-340 32 Offices Nationwide www.gza.com Copyright© 2022 GZA GeoEnvironmental Inc.

August 8, 2022 File No. 26.0092704.00 PSE&G 80 Park Plaza Newark, New Jersey 07101 Attention: Mr. Matthew Cieri Civil Project Engineer Report Subsurface Investigation West Orange Switching Station Lifecycle Project West Orange, Essex County, New Jersey PSE&G Introduction This report presents the results of a subsurface investigation performed by GZA GeoEnvironmental, Inc. (GZA) for improvements to the West Orange switching station located at 341 Mount Pleasant Avenue in West Orange, Essex County, New Jersey. The subject site is identified as Block 155, Lot 26.01 on the local tax map and is shown on the Site Location Map, Plate 1. Our work was performed in general accordance with our proposal dated May 13, 2022. Proposed Construction The Lifecycle project would reportedly consist of installation of a new 26kV switchgear and associated structures and equipment at the existing switching station. No other details were provided. An Equal Opportunity Employer M/F/V/H

August 8, 2022 File No. 26.0092704.00 PSE&G – West Orange, NJ Page 2 Proactive by Design Purpose and Scope of Work The purpose of our services was to: 1) explore the subsurface soil and groundwater conditions by performance of the five (5) requested test borings and three (3) test pits; 2) estimate the relevant geotechnical engineering properties of the encountered materials; 3) evaluate the site foundation requirements considering the anticipated construction and encountered subsurface conditions; 4) recommend appropriate types of foundations for support of the proposed equipment, and provide geotechnical-related foundation design and installation criteria, including an estimate of the Site Class as defined by the International Building Code 2018, New Jersey Edition, for seismic design purposes; 5) perform field permeability/percolation tests and/or collect tube samples for laboratory permeability testing at each test pit, if appropriate; 6) obtain samples from depths of approximately 3 and 8 feet from the three test pit locations and submit them to Geotherm USA for thermal resistivity testing; 7) arrange for a field resistivity survey to be performed at locations to be identified in the future; and 8) discuss appropriate earthwork considerations consistent with the proposed construction and encountered subsurface conditions. To accomplish these purposes, a subsurface exploration program consisting of five supervised test borings and three supervised test pits was performed. Prior to advancing the test borings, the areas were initially scanned with ground-penetrating radar. The boring locations were then hand excavated to about 3 feet prior to the start of sampling. The test borings were advanced through the hand excavations using mud-rotary drilling equipment mounted on an ATV drill rig and extended to depths of approximately 15 to 30 feet below the existing ground surface (bgs) at which point refusal was An Equal Opportunity Employer M/F/V/H