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• Geotechnical Engineering Report January 8,2021 <br /> Glint Car Wash and Sonic Everett,Everett,Washington RGI Project No.2020-643-1 <br /> APPENDIX A <br /> FIELD EXPLORATION AND LABORATORY TESTING <br /> On December 15, 2020, RGI explored the subsurface soil conditions at the site by <br /> observing the drilling of eight borings to a maximum depth of 16 feet below existing <br /> grade. The boring locations are shown on Figure 2. The boring locations were <br /> approximately determined by measurements from existing property lines and paved <br /> roads. <br /> A geologist from our office conducted the field exploration and classified the soil <br /> conditions encountered, maintained a log of each exploration, obtained representative <br /> soil samples, and observed pertinent site features. All soil samples were visually classified <br /> in accordance with the Unified Soil Classification System (USCS). <br /> Representative soil samples obtained from the explorations were placed in closed <br /> containers and taken to our laboratory for further examination and testing. As a part of <br /> the laboratory testing program,the soil samples were classified in our in house laboratory <br /> based on visual observation,texture, and the limited laboratory testing described below. <br /> Moisture Content Determinations <br /> Moisture content determinations were performed in accordance with the American <br /> Society of Testing and Materials D2216-10 Standard Test Methods for Laboratory <br /> Determination of Water (Moisture) Content of Soil and Rock by Mass (ASTM D2216) on <br /> representative samples obtained from the exploration in order to aid in identification and <br /> correlation of soil types. The moisture content of typical sample was measured and is <br /> reported on the boring logs. <br /> Grain Size Analysis <br /> A grain size analysis indicates the range in diameter of soil particles included in a <br /> particular sample. Grain size analyses for the greater than 75 micrometer portion of the <br /> samples were performed in accordance with American Society of Testing and Materials <br /> D422 Standard Test Method for Particle-Size Analysis of Soils (ASTM D422) on four of the <br /> samples,the results of which are attached in Appendix A. <br /> Corporate Office <br /> 17522 Bothell Way Northeast <br /> Bothell,Washington 98011 <br /> Phone 425.415.0551• Fax 425.415.0311 <br /> 161ww.rilev-group.com <br />