501 RIVERSIDE RD REGIONAL DISPOSAL COMPANY EVT TRANSFER FACILITY PHASE 1 SITE IMP Geotech Report 2025-07-28

RDC EVERETT TRANSFER FACILITY Everett,Washington INTRODUCTION This report contains the results of our geotechnical engineering services for the proposed Master Plan at Regional Disposal Company's pavement and stormwater improvements Everett g p Transfer Facility located in Everett, Washington. The project site is located between the BNSF railroad (RR)tracks and the Snohomish River at the end of Riverside Road. The project location is shown on the Vicinity Map, Figure 1. The site survey of existing conditions is shown on the Site Plan, Figure 2. Project Description We understand that Reid Middleton has been contracted by the Regional Disposal Company(RDC) to prepare a Master Plan to control stormwater discharge at their transfer facility in north Everett,Washington. The Master Plan will consist of pavement and stormwater system improvements with the ultimate goal of reducing turbid water runoff from leaving the site and discharging into the Snohomish River, as well as providing better conditions for operations. We understand that RDC leases the 15.77-acre Everett Transfer Facility site (Lot 8) from Snohomish County. RDC uses the site to load and offload refuse containers shipped by rail to and from the company landfill at Roosevelt, Washington. The RDC is proposing to pave the entire site in phases to control stormwater drainage, to improve water quality, and to improve the overall function of the site. Purpose and Scope The purpose of our services is to explore the subsurface conditions at the site as a basis for providing preliminary geotechnical recommendations for design of the pavement sections. Our geotechnical engineering services were completed in accordance with our proposal for the project, dated March 25, 2013. GeoEngineer's previously delineated wetlands at the site and prepared a Wetland Delineation I Report, dated May 6, 2013. FIELD EXPLORATION AND LABORATORY TESTING Field Explorations111 The subsurface conditions for the proposed pavement improvements were evaluated by drilling eight borings (B-1 through B-8). The borings were advanced to depths of 111/2 to 161 feet below existing site grades. The approximate locations of the explorations are shown on the Site Plan, Figure 2. A detailed description of the field exploration program is presented in Appendix A. Laboratory Testing I Soil samples were collected from the explorations,taken to our laboratory and examined to confirm or modify field classifications, as well as to evaluate engineering properties of the soil. Representative samples were selected for laboratory testing consisting of determination of moisture content, percent finer than No. 200 sieve, grain size distribution, Atterberg limits 1 GEOENGINEERSZ June 18,2013 Page 1 File No.4322-002-00 I