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Geotechnical Engineering Evaluation NGA File No. 1213420 <br /> CM Heating Additions January 8,2021 <br /> Everett,Washington Page 2 <br /> 4. Provided recommendations for site preparation and earthwork. <br /> 5. Provided recommendations for foundation support and soil bearing capacities. <br /> 6. Provided recommendations for temporary and permanent slopes. <br /> 7. Provided opinion on stormwater infiltration feasibility. <br /> 8. Provided general recommendations for site drainage and erosion control. <br /> 9. Documented the results of our findings, conclusions, and recommendations in a written <br /> geotechnical report. <br /> SITE CONDITIONS <br /> Surface Conditions <br /> The site consists of three adjacent rectangular-shaped parcels covering a total area of approximately <br /> 0.38 acres. The site is currently occupied by a single-family residence, a commercial structure, and <br /> asphalt parking areas within the northern, southern, and central portions of the site, respectively. The <br /> property is bordered by Broadway to the west, an alley to the east, and neighboring commercial parcels <br /> to the north and south. The site is relatively level to gently sloping. We did not observe surface water <br /> within the site during our site visit on December 4, 2020. <br /> Subsurface Conditions <br /> Geology:The Geologic Map of the Everett 7.5-Minute Quadrangle, Snohomish County, Washington, by <br /> James P. Minard (USGS, 1985), was reviewed for this site.The site is mapped as Vashon till.The Vashon <br /> till is described as a non-sorted mixture of clay, silt, sand, pebbles, cobbles, and boulders, all in variable <br /> amounts. Our explorations generally encountered dense,gray, silty sand with various amounts of gravel, <br /> which we interpreted as native glacial till at depth. <br /> Explorations: The subsurface conditions within the site were explored on December 4, 2020 with six <br /> hand augured explorations.The approximate locations of our explorations are shown on the Site Plan in <br /> Figure 2. <br /> A geologist from NGA was present during the explorations, examined the soils and geologic conditions <br /> encountered, obtained samples of the different soil types, and maintained logs of the explorations.The <br /> soils were visually classified in general accordance with the Unified Soil Classification System, presented <br /> in Figure 3.The logs of our test pits are attached to this report and are presented as Figure 4 and 5.We <br /> present a brief summary of the subsurface conditions in the following paragraph. For a detailed <br /> description of the subsurface conditions,the exploration logs should be reviewed. <br /> NELSON GEOTECHNICAL ASSOCIATES, INC. <br /> S � 2I <br />