2202 100TH ST SW Geotech Report 2022-10-25

4 Subsurface Exploration, Geologic Hazard,and Stephens Everett Property Preliminary Geotechnical Engineering Report Everett, Washington Project and Site Conditions practices in effect in this area at the time our report was prepared. No other warranty, express or implied, is made. 2.0 PROJECT AND SITE DESCRIPTION The project site is comprised of three Snohomish County Tax Parcels (Nos. 0053820000-4300, -4400, and -4500) located southeast of the intersection 100th Street SW and 23rd Avenue West located in Everett, Washington, as shown on the attached "Vicinity Map" (Figure 1). These parcels are visually delineated by 100th Street SW to the north, residential properties to the east and south, and 23rd Avenue West to the west. Combined, the parcels are rectangular in shape and have an approximate area of 1.5 acres. Our attached "Existing Site and Exploration Plan" (Figure 2) illustrates the property boundaries and various existing features. Each parcel is undeveloped and moderately vegetated with alder and cottonwood trees, and understory shrubs and bushes. Site topography slopes gently downward toward existing, elongated, wetland areas located in the eastern-central portion of the project site. Overall vertical relief across the site is approximately 12 feet. We understand the site is currently being considered for development of a new 11,865-square-foot, manufacturing building located near the southwest corner of the project site. According to conceptual layout drawings provided to us, other site features will include paved parking and driveway areas, loading dock, utilities, sidewalks, and landscaping. 3.0 SUBSURFACE EXPLORATION Our field studies were conducted for this project in March 2019 and included excavating seven exploration pits. The various types of sediments, as well as the depths where the characteristics of the sediments changed, are indicated on the exploration logs presented in the Appendix attached to this report. The depths indicated on the logs where conditions changed may represent gradational variations between sediment types. If changes occurred between sample intervals in our explorations, they were interpreted. Our explorations were approximately located in the field by measuring from known site features depicted on the preliminary plans referenced earlier. The locations of our explorations are shown on Figure 2 relative to existing site features. Figure 3 presents our exploration locations relative to the proposed development. The conclusions and recommendations presented in this report are based, in part, on the explorations completed for this study. The number, locations, and depths of the explorations were completed within site and budgetary constraints. Because of the nature of exploratory work below ground, extrapolation of subsurface conditions between field March 29,2019 ASSOCIATED EARTH SCIENCES,INC. TG/ms-180567E001-2-Projects1201805671 KE1 WP Page 2