2025 06 18 WEH Slope Stability Analysis Letter Report

Executive Summary of Global Stability Study for Eastern Slope near Building D West Essex – Highlands Development West Orange, New Jersey Langan Project No.: 101049801 14 January 2025 Revised 18 June 2025 Page 2 of 2 methods are utilized, and would be stable following the construction of Building D based on its anticipated structural loads and distance of Building D from the top of the slope. It should be noted that Langan’s study is based on the geotechnical subsurface data collected at accessible locations within the Study Area, the topographic survey data, currently existing site conditions and proposed building information made available to us. Any proposed changes in proposed structures (location, layout, loading, elevation) or existing slope conditions should be brought to our attention so that we can determine whether such changes affect our conclusions. Sincerely, Langan Engineering and Environmental Services, LLC Mark K. Seel, P.E. Vice President Ronald D. Boyer, P.E. Senior Principal / Senior Vice President Enclosure(s): Letter Report cc: John Cote, Michael Vitello, Adam Yoda / Langan NJ Certificate of Authorization No. 24GA27996400 \\langan.com\data\PAR\data8\101049801\Project Data\_Discipline\Geotechnical\Reports\2024 - Slope Stability Memorandum\2025-01-14 - Slope Stability Analysis Executive Summary.docx