600 RIVERSIDE RD Geotech Report 2022-10-25

Landau Associates , 1.0 INTRODUCTION This report summarizes the results of geotechnical engineering services conducted by Landau Associates, Inc. (LAI) for the Port of Everett's (Port) Riverside Business Park Public Access Trails and Roadway Improvements project in Everett, Washington. The general project location is shown on the Vicinity Map (Figure 1). The general configuration of the project area that is the subject of this report is shown on the Site and Exploration Plan (Figure 2). This report has been prepared based on our discussions with KPFF and the Port; a base map of the project area provided by KPFF; data collected during our field investigation; our familiarity with geologic conditions within the vicinity of the project area; and our experience on similar projects. 1.1 Project Description LAI understands that the Port intends to develop the Riverside Business Park with roads, trails, and utilities to service the lots that the Port plans to offer for sale. The Port also intends to transfer the roads, stormwater pond, and utility and stormwater infrastructure to the City of Everett for ownership and maintenance. We understand that the following project elements require geotechnical input: • Improvements to the fronting streets, including new curb, gutter, and sidewalk along the north -south and east -west portions of River Road (sidewalk making trail segment "E"), relocating the cul-de-sac at the end of 8th Street to the west (i.e., shortening of 8th Street), new curb, gutter, sidewalk (trail segment "I"), and new asphalt pavement along 8th Street. (This element of the project was constructed prior to this geotechnical report being finalized). • Relocation of a power duct bank from Lot 5 into 8th Street and upsizing of an existing water main in 8th Street. (This element of the project was constructed prior to this geotechnical report being finalized). • Relocation of an existing sewer lift station to just east of the proposed 8th Street cul-de-sac location. (This element of the project was constructed prior to this geotechnical report being finalized). • New storm drain lines, manholes, and pump station. It is our understanding that the depths of the proposed storm drain lines will be approximately 3 to 5 ft below ground surface (bgs), and the depths of the proposed pump stations will be approximately 12 to 13.5 ft bgs. (This element of the project was constructed prior to this geotechnical report being finalized). • A new trail with viewpoints that begins at the 8th Street cul-de-sac and follows the Snohomish River in a northerly direction (trail segments C, D, F, G, H, J, and K). 1.2 Scope of Services KPFF retained LAI to assess subsurface conditions at the project site and develop environmental and geotechnical recommendations suitable to support design and construction of the above described project elements. Specifically, our proposed scope of services includes the following specific tasks: Geotechnical Engineering Report 0121030.010.011 Riverside Business Park March 22, 2018 Public Access Trails and Roadway Improvements 1-1 1 1 1 C!