251203_42 ERW_Stormwater Report

GEOTECHNICAL DATA REPORT (Stormwater Conditions) November 25, 2025 42 Eagle Ridge Way Block 106; Lot 24.01 Township of West Orange Essex County, New Jersey Prepared for: Waystone Realty LLC 42 Eagle Ridge Way West Orange, NJ 07052 Prepared by: _______________________________ Francisco Sanchez-Dominici New Jersey Professional Engineer License No. GE061874 _______________________________ Ahmed Elmekati New Jersey Professional Engineer License No. GE053487 Colliers Engineering & Design, Inc. 300 Tice Blvd, Suite 101 Woodcliff Lake, NJ 07677 Main: 845-352-0411 Colliersengineering.com Project No. 24006174A

Revisions Revision Date Description Prepared by Checked by 1 11/25/25 Revised per Michaela Nicodemo comments FSD AHE 0 09/25/25 Initial release (signed) FSD AHE CED Project No. 24006174A

Table of contents Introduction ........................................................................................................................................................................ 1 Available Information ........................................................................................................................................................ 1 Site and Project Description ............................................................................................................................................ 1 Stormwater Subsurface Exploration ............................................................................................................................. 1 Subsurface Conditions ..................................................................................................................................................... 1 Soil Stratification ............................................................................................................................................................. 1 General Groundwater Observations ............................................................................................................................. 2 Seasonal High Groundwater Table ............................................................................................................................... 2 In-situ Infiltration Testing ................................................................................................................................................. 2 Proposed Stormwater Facilities ..................................................................................................................................... 2 Measured Field Intake Rate ............................................................................................................................................ 2 Closing .................................................................................................................................................................................. 3 Limitations ........................................................................................................................................................................... 3 GEOTECHNICAL DATA REPORT | November 25, 2025

Table Table 1. Summary of Groundwater Observations ..................................................................................................... 2 Table 2. Summary of In-Situ Infiltration Tests ............................................................................................................. 3 Drawing B-01-ELP.................................................................................................................................. Exploration Location Plan Appendix Appendix A .................................................................................................................................................... Test Pit Logs Appendix B ......................................................................................................................................Test Pit Photographs Appendix C ......................................................................................................................... Single Ring Infiltration Logs GEOTECHNICAL DATA REPORT | November 25, 2025

Introduction In accordance with our proposal dated August 15, 2025, Colliers Engineering & Design, Inc. (CED), performed a subsurface exploration program for the proposed stormwater infiltration facilities in support of the proposed development located at 42 Eagle Ridge Way, Township of West Orange, Essex County, New Jersey. The program was undertaken to explore the infiltration characteristics of the soils at locations selected by the Site Civil Engineer. This report presents a summary of the data collected during CED’s field presence and the results of the performed in-situ infiltration tests. Available Information 1. Drawing titled, “Preliminary and Final Major Site Plan for 42 Eagle Ridge Way”, by Colliers Engineering & Design, dated October 18, 2024. Site and Project Description The project site is located at 42 Eagle Ridge Way, Township of West Orange, Essex County, New Jersey. The site is identified as Block 106, Lot 24.01 on the corresponding tax map. Eagle Ridge Way bounds the site towards Northwest. A residential development is located on the northeast side of the site. Wooded areas are located along the southeast and southwest sides of the side. The site is currently a vacant lot. Surface grades generally slope downward from El. 626± towards West to El. 612± towards East. We understand stormwater management facilities are proposed on the east side of the site. Stormwater Subsurface Exploration CED performed a subsurface exploration program consisting of two test pits, TP-101 and TP-102, within the footprint of the proposed stormwater management facilities. The test pits were performed at locations selected by the Site Civil Engineer and extended up to 6 ft below existing surface grades where bedrock was encountered. Our representative located the test pits based on existing site features and handheld GPS equipment. Drawing B-01-ELP presents the locations of the test pits. The test pits were performed by Grabowski Construction, Inc. of West Orange, New Jersey, on August 28, 2025, under a direct contract with the client. The test pits were performed under the continuous observation of CED representative, Mr. Francisco Sanchez-Dominici, PE. The test pits were backfilled upon completion. Subsurface Conditions Soil Stratification The site soils were exposed at the surface at the test pit locations. Soils encountered within the test pits generally

pits were backfilled upon completion. Subsurface Conditions Soil Stratification The site soils were exposed at the surface at the test pit locations. Soils encountered within the test pits generally consist of silt loam/silt clay loam, varying amounts of sand/gravel/boulders. The test pits were terminated due to refusal encountered on bedrock at depths of up to 6 ft below existing grades. GEOTECHNICAL DATA REPORT | November 25, 2025 Page 1

The test pit logs are presented in Appendix A. Soils encountered were classified in the field in general accordance with the USDA Soil Classification System, a summary of which is presented in Appendix A. Photographs of the test pits are presented in Appendix B. General Groundwater Observations Groundwater conditions were not encountered within the test pits during the time of our onsite presence. Table 1 presents a summary of our observations. Groundwater observations noted above reflect the conditions at the time of our onsite presence. Note that groundwater levels can fluctuate with locations, seasonal changes, precipitation, nearby construction activities, foreign influences such as leakage into and out of utilities, and other factors. Pockets or seams of gravels, sands, silts, or open fractures and joints can store and transmit “perched” groundwater flow or seepage. Seasonal High Groundwater Table Evidence of seasonal high groundwater table was not encountered within the test pits. Table 1. Summary of Groundwater Observations Location Ground Elevation (ft) Measured Groundwater Depth (ft)* Measured SHGW Depth (ft)** TP-101 613± N.E. N.D. TP-102 615.5± N.E. N.D. * N.E.: Not Encountered ** N.D.: Not Detected In-situ Infiltration Testing A total of two in-situ infiltration tests were performed within the test pits at a depth of 3 ft below existing grades. The single ring infiltrometer tests were performed in accordance with Chapter 12 of the New Jersey BMP Manual. A summary of the performed single ring infiltrometer tests is presented in Table 2. Measured Field Intake Rate Appendix C presents the details of the infiltration tests and corresponding results. Table 2 presents a summary of these results. GEOTECHNICAL DATA REPORT | November 25, 2025 Page 2

Table 2. Summary of In-Situ Infiltration Tests. Location ID Test Depth (ft) TP-101 3 TP-102 3 Soil Description Test Type Measured Field Intake Rate (in/hr) Silt Loam Single Ring 2.2 in/hr Silt Clay Loam Single Ring 30 in/hr (see logs for full description) Closing The data presented in this report is based on field observations. The number, location, and depth of the explorations were completed as requested by the project team. Limitations This data report and all supporting documentation have been prepared exclusively for the use of Waystone Realty LLC pursuant to the Agreement between Colliers Engineering & Design (DBA Maser Consulting) and Waystone Realty LLC. All provisions set forth in the Agreement and the General Terms and Conditions attached thereto are incorporated herein by reference. No warranty, express or implied, is made herein. The field observations and data contained in this report are based on limited exploration of the subsurface at the referenced project site, at the locations and depths indicated in this report. The explorations indicate subsurface conditions at the specific locations, depths, and times explored. This report is intended to serve as a data report. CED is not responsible for any claims, damages, or liability associated with interpretation of subsurface data or reuse of the subsurface data or engineering analysis without the expressed written authorization of CED. This data report and related documentation are instruments of service. The subject matter of this data report is limited to the facts and matters stated herein. The scope of this subsurface exploration did not include geotechnical interpretation or evaluation of the findings, or investigation or evaluation of any environmental issues, such as wetlands, or hazardous or toxic materials on, below, or in the vicinity of the subject site. Any statements in this report or supporting documentation regarding odors or unusual or suspicious items or conditions observed are strictly for information only GEOTECHNICAL DATA REPORT | November 25, 2025 Page 3

Drawing GEOTECHNICAL DATA REPORT | November 25, 2025

& Design, Engineering S Architecture, Surveying, CT Landscape P.C. Architecture, E NO RT H Engineering & Design www.colliersengineering.com W Copyright © 2025. Colliers Engineering & Design All Rights Reserved. This drawing and all the information contained herein is authorized for use only by the party for whom the services were contracted or to whom it is certified. This drawing may not be copied, reused, disclosed, distributed or relied upon for any other purpose without the express written consent of Colliers Engineering & Design. Doing Business as C O N S U L T I N G N ENGINEERS + SURVEYING PROTECT YOURSELF ALL STATES REQUIRE NOTIFICATION OF EXCAVATORS, DESIGNERS, OR ANY PERSON PREPARING TO DISTURB THE EARTH'S SURFACE ANYWHERE IN ANY STATE R TP-102 TP-101 STATE REQUIRED FILE NUMBER 2024\24006174A\Geotechnical\Explorations\B-EXPL.dwg\B-01 (42ERW) (2) By: NAJIB.ARSALAN . . . . . . . . . . . . . . . . . . . . . . . DATE REV DRAWN BY . DESCRIPTION FOR STATE SPECIFIC DIRECT PHONE NUMBERS VISIT: WWW.CALL811.COM EXPLORATION LOCATION PLAN FOR LEGEND: GENERAL NOTES: 1. BASE PLANS BASED ON DRAWING TITLED "SOIL EROSION & SEDIMENT CONTROL PLAN" DATED MAY 22, 2025, BY COLLIERS ENGINEERING & DESIGN. WAYSTONE REALTY LLC TP-1XX BLOCK 106; LOT 20.03 42 EAGLE RIDGE WAY TOWNSHIP OF WEST ORANGE ESSEX COUNTY, NEW JERSEY TEST PIT LOCATION (AUGUST, 2025) 2. THIS DRAWING IS PART OF COLLIERS ENGINEERING & DESIGN'S REPORT (PROJECT NO. 24006174A) AND SHOULD ONLY BE USED IN CONJUNCTION WITH THE REPORT. WOODCLIFF LAKE 3. TEST PIT SERIES TP-1XX PERFORMED BY GRABOWSKI CONSTRUCTION, INC. ON AUGUST 28, 2025, UNDER CONTINUOUS OBSERVATION OF CED. 300 Tice Boulevard Suite 101 Woodcliff Lake, NJ 07677 Architecture, Surveying, & Engineering Design, CT Landscape P.C. Architecture, Engineering Phone: 845.352.0411 & Design COLLIERS ENGINEERING & DESIGN, INC. DOING BUSINESS AS MASER CONSULTING SCALE: 4. TEST PITS BACKFILLED WITH CUTTINGS UPON COMPLETION. DATE: DRAWN BY: CHECKED BY: NA FSD AS SHOWN 11/25/25 PROJECT NUMBER: 24006174A 60 0 60 SHEET TITLE: DRAWING NAME: B-EXPL FIELD BOOK: XX PAGE: XX EXPLORATION LOCATION PLAN SCALE : 1" = 60' Linear unit of measure: US Survey Foot (1 ft = 1200/3937 m) UNAUTHORIZED ONLY MAPS WITHALTERATION THE LAND SURVEYOR OR ADDITION OR PROFESSIONAL TO A SURVEY