101 E MARINE VIEW DR SEPA 018 - 011 Geotech Report 2025-04-15

Geotechnical Engineering Evaluation NGA File No.988017 East Marine View Drive Warehouse May 19,2017 Everett,Washington Page 2 SITE CONDITIONS Surface Conditions The property consists of irregular-shaped parcel covering approximately 7.74 acres. The site is relatively level and currently occupied by a burnt down commercial warehouse building with large paved parking areas surrounding the old warehouse building. The ground surface within the property is generally covered with crushed rock, asphalt paving or concrete slabs with limited vegetation. The site is bounded to the north by the Snohomish River, to the east and west by commercial properties and to the south by East Marine View Drive. We observed indications of minor settlement and cracking within the existing pavements within the property. We also observed indications of minor ponding surface water within multiple areas within the site during our most recent site visit on March 30,2017. Subsurface Conditions Geology: The geologic units for this site are shown on the Geologic Map of the Marysville 7.5-Minute Ouadrangle, Snohomish County, Washington, by James P. Minard (USGS Miscellaneous Field Studies Map 1985). The site is mapped as Younger Alluvium and Estuarine Deposits (Qyal). The younger alluvium is described as sand, silt, and clay. Our explorations encountered sand and silt soils generally consistent with the description of Younger Alluvium deposits. Explorations: The subsurface conditions within the site were explored on March 30 through 31,2017 by monitoring two geotechnical borings performed by a track-mounted drill rig extending to approximate depths in the range of 86.5 and 91.5 feet below the existing ground surface. The approximate locations of the borings are shown on the Schematic Site Plan in Figure 2. A geologist from NGA was present during the explorations, examined the soils and geologic conditions encountered, obtained samples of the different soil types,and maintained logs of the borings. A Standard Penetration Test(SPT)was performed on each of the samples during drilling to document soil density at depth. The SPT consists of driving a 2-inch outer-diameter, split-spoon sampler 18 inches using a 140-pound hammer with a drop of 30 inches. The number of blows required to drive the sampler the final 12 inches is referred to as the"N"value and is presented on the boring logs. The N value is used to evaluate the strength and density of the deposit. The soils were visually classified in general accordance with the Unified Soil Classification System, presented in Figure 3. The boring logs are attached to this report and are presented as Figures 4 and 5. We present a brief summary of the subsurface conditions in the following paragraph. For a detailed description of the subsurface conditions,the test pit logs should be reviewed. NELSON GEOTECHNICAL ASSOCIATES, INC.