Geotech Report 05 23 2023

SOR CONSULTING ENGINEERS, INC. Geotechnical Engineering - Materials Testing - Forensic Studies 98 Sand Park Rd., Cedar Grove, NJ 07009 (973) 239-6001 Fax (973) 239-8380 www.sorlabs.com Kamil Sor, Ph.D. Orhun Sor, P.E. Atilla Sencar, P.E. May 23, 2023 Job No. 23-C-16 Report No. 23-C-17 Garden Homes 820 Morris Turnpike, Suite 301 Short Hills, NJ 07078 Attention: Mark Hoffman E-Mail: MarkH@gardenhomes.com Re: Subsurface Investigation Report Subsurface Stormwater Management System West Orange, New Jersey INTRODUCTION Sor Consulting Engineers, Inc. (SCE) is pleased to present the results of a subsurface investigation performed for a proposed stormwater management system to be constructed at a site in West Orange, New Jersey. The site is identified as Lot 32, Block 179 on the municipal tax maps. Based on a concept plan dated September 23, 2022, the proposed development will reportedly include a combination of stormwater detention basins as well as underground perforated pipes installed at various locations beneath pavements. PURPOSE AND SCOPE OF WORK The purpose of this study was to: e explore the subsurface soil and groundwater conditions within the proposed stormwater management system area; e estimate the geotechnical engineering properties of the encountered subsurface materials including soil permeability; e estimate the depth to the seasonal high water table; and e present recommendations for stormwater infiltration system design.