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Geotechnical Engineering Report <br /> lrerracon <br /> Merrill Creek Operations Base Expansion • Everett, Washington <br /> ' December 14, 2020 • Terracon Project No. 81205012 GeoReport <br /> Procedural standards noted below are for reference to methodology in general. In some cases, <br /> variations to methods were applied because of local practice or professional judgment. Standards <br /> I noted below include reference to other, related standards. Such references are not necessarily <br /> applicable to describe the specific test performed. <br /> ASTM D2216 Standard Test Methods for Laboratory Determination of Water (Moisture) <br /> Content of Soil and Rock by Mass <br /> ASTM D422 Standard Test Method for Particle-Size Analysis of Soils <br /> The laboratory testing program included examination of soil samples by an engineer. Based on <br /> the material's texture and plasticity, we described and classified the soil samples in accordance <br /> with the Unified Soil Classification System. <br /> I <br /> I <br /> I <br /> I <br /> I <br /> I <br /> I <br /> I <br /> I <br /> I <br /> I <br /> Responsive • Resourceful • Reliable EXPLORATION AND TESTING PROCEDURES 2 of 2 <br />