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APPENDIXB <br />LABORATORY INVESTIGATION <br />The lahoratory testing program was directed toward a quantitative and qualitat-ive <br />evaluati on o f the physical and mechanical properties of the soil s underlying the site and <br />to aid in verifying soi l classification. <br />Moisture Content: The natural water content was determined (ASTM D-2216) on a ll <br />samples of the materials recovered from the test pits, as summarized in Table B-1 . <br />TABLE B-1. MOISTURE CONTENT DATA <br />Test Pit Sample Estimated Moisture Test Pit Sample Estimated Moisture <br />Number Number Depth Content Number Number Depth Content <br />(feet) (percent) (feet) (percent) <br />TP -4 1 0 -3 8 TP -10 1 2½ -10½ 27 <br />TP -5 1 2-9 24 TP -10 2 10½ -17 24 <br />TP -5 2 9 -11½ 14 TP -11 1 11 -14½ 31 <br />TP -5 3 11 ½ -13½ 2 TP -11 2 14½-17½ 26 <br />TP -6 1 0 -4 15 TP -12 1 2½ -8 18 <br />TP -6 2 4 -12 25 TP -14 1 7-8½ 13 <br />TP -6 3 12 -17 27 TP -16 1 0-3 22 <br />TP -6 4 17 -18 33 TP -16 2 11 -17½ 32 <br />TP -7 1 0 -2½ 7 <br />TP -7 2 2½ -5½ 12 . <br />TP -8 1 0 -3 11 <br />TP -8 2 3-8½ 16 <br />TP -8 3 8½ -10½ 12 <br />Plasticity Index: Plasticity Index determinations (ASTM D-4318) were performed on two <br />samples of the subsurface soils to m easure the r ange of water contents over which these <br />materi a ls exhibit plasticity. The Atterberg Limit s were u sed to classify the soil in <br />accordance with the Unified Soil Classification System a nd t o evaluate the soil expan sion <br />potential. Results of t h ese tests a re presented o n Figure B-1 . <br />* * * * * * * * <br />LOWNEY AS::CCIATES <br />Environmental / Geotechnical / Engineering Services ---------------------Page B-1