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APPENDIX C <br />Laboratory Testing Results by EGLAB. Inc. <br />Laboratory testing was performed by EGLAB, Inc. The laboratory testing program was directed towards <br />providing quantitative data relating to the relevant engineering properties of the soils. Samples considered <br />representative of site conditions were tested in general accordance with American Society for Testing and <br />Materials (ASTM) procedure and/or California Test Methods (CTM), where applicable. The following <br />summary is a brief outline of the test type and the results are presented on the following pages. LGC has <br />reviewed the laboratory test data, procedures and results performed by EGLAB, Inc. (EGL) with <br />respect to the subject site and concurs with and accepts responsibility as geotechnical engineer of <br />record for their work (laboratory testing). <br />Moisture and Density Determination Tests: Moisture content (ASTM D2216) and dry density <br />determinations (ASTM D2937) were performed on relatively undisturbed samples obtained from the test <br />borings and/or trenches. The results of these tests are presented in the boring logs. Where applicable, only <br />moisture content was determined from undisturbed or disturbed samples. <br />Soil Classification: Soils were classified according the Unified Soil Classification System (USCS) in <br />accordance with ASTM Test Methods D2487 and D2488. This system uses relies on the Atterberg Limits <br />and grain size distribution of a soil. The soil classifications (or group symbol) are shown on the laboratory <br />test data, and boring logs. <br />Expansion Index: The expansion potential of selected samples were evaluated by the Expansion Index Test, <br />U.B.C. Standard No. 18-2 and/or ASTM D4829. Specimens are molded under a given compactive energy <br />to approximately the optimum moisture content and approximately 50 percent saturation or approximately <br />90 percent relative compaction. The prepared 1-inch-thick by 4-inch-diameter specimens are loaded to an <br />equivalent 144 psf surcharge and are inundated with tap water until volumetric equilibrium is reached. <br />Sample <br />Location <br />Sample <br />Description <br />Expansion <br />Index <br />Expansion Potential <br />B-LGC-2 @1-5' <br />Sandy SILT <br />101 <br />High <br />Maximum Densi , Tests: The maximum dry density and optimum moisture content of typical materials <br />were determined in accordance with ASTM D1557. <br />Sample <br />Location <br />Sample <br />Description <br />Maximum Dry <br />Density (pcf) <br />Optimum Moisture <br />Content (%) <br />B-LGC-3 @ 1-5' <br />Sandy CLAY <br />122.5 <br />12.5 <br />Pro' ity Counu 18 — 868 1 021 <br />� <br />