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Geotechnical Engineering Report <br /> Merrill Creek Operations Base Expansion <br /> 7100 Hardeson Road <br /> Everett, Washington <br /> Terracon Project No. 81205012 <br /> December 14, 2020 <br /> INTRODUCTION <br /> This report presents the results of our subsurface exploration and geotechnical engineering <br /> services performed for the proposed building expansion of the Merrill Creek Operations Base <br /> located at 7100 Hardeson Road in Everett, Washington. The purpose of these services is to <br /> provide information and geotechnical engineering recommendations relative to: <br /> • Subsurface soil conditions . Floor slab design and construction <br /> • Groundwater conditions • Seismic considerations and liquefaction <br /> • Site preparation and earthwork • Lateral earth pressures <br /> • Foundation design and construction • Pavement design and construction <br /> The geotechnical engineering Scope of Services for this project included the advancement of two <br /> soil borings to depths of approximately 26% and 41% feet below existing site grades. We had <br /> previously identified the potential for soft pond sediments beneath the southern portion of the <br /> building expansion and recommended the deeper boring; however, soft pond sediments were not <br /> encountered during drilling. <br /> Maps showing the site and boring locations are shown in the Site Location and Exploration <br /> Plan sections, respectively. The results of the laboratory testing performed on soil samples <br /> obtained from the site during the field exploration are included on the boring logs and as separate <br /> graphs in the Exploration Results section. <br /> SITE CONDITIONS <br /> The following description of site conditions is derived from our site visit in association with the <br /> field exploration and our review of publicly available geologic and topographic maps. <br /> Responsive • Resourceful • Reliable 1 <br />