25 10 28 Slope Stability Review

1 Tower Center Blvd. 20th Floor East Brunswick, NJ 08816 732.727.8000 www.cmeusa1.com October 28, 2025 Chairman and Members of the West Orange Planning Board 66 Main Street West Orange, NJ 07052 Re: Application No. PB24-01 West Essex Highlands, LLC Warner Road Block 179, Lot 32 Review of Applicant’s Engineer’s Slope Stability Analysis Reports, the Objector’s Engineer’s Response Reports; and the Applicant’s Engineer’s Rebuttal Report Our File: 115.WRP0179.V01 Dear Planning Board: In accordance with your authorization, Geotechnical Engineers from our office have reviewed the Applicant’s and Objector’s Engineering reports concerning slope stability along the ridge line on the eastern side of the site in the area of proposed Building D. For the purpose of this memorandum, the Applicant is West Essex Highlands, LLC. (“Applicant”). The Applicant’s Engineer for analysis of the slope stability is Langan Engineering, LLC (“Langan”). The opposition is We Care (“Objector”). The Objector’s Engineer is Princeton Hydro (“Princeton Hydro”). INTRODUCTION The purpose of our work was to review the Applicant’s Engineer’s Stability Analysis Reports and the Objector’s Engineer’s Response reports and to: 1. Provide a technical opinion on the findings of each report. 2. Assess the need for additional evaluation by the Applicant. 3. Provide recommendations to the Board for the setting of requirements for monitoring and maintenance of the stability of the slopes during the construction and for maintenance thereafter. CME’s Geotechnical Engineers performed the following scope of work to accomplish this purpose: 1. We read and evaluated the reports submitted to the Planning Board as summarized in the list of references in the following section of this letter. 2. We visited the area of the site in question on October 2, 2025, along with Paul W. Anderson, PE, the Applicant’s Site Engineer, to evaluate conditions along the ridge in relation to the descriptions contained in the Applicant’s and the Objector’s reports.