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GSI GeoStrategies, Inc Log of Boring B-7 <br /> PROJECT BP Oil Statron Ato 11191 LOCATION 1469 East Hammer Lane, Stockton, CA <br /> GSI PROJECT NO 4300701 SURFACE ELEVATION <br /> DATE STARTED 2-2-95 WL (ft bgs) BATE TIME <br /> DATE FINISHED 2-2-95 WL (ft bgs) DATE TIME <br /> DRILLING METHOD 6 75" dra hallow-stem auger TOTAL DEPTH 515 Feet <br /> DRILLING COMPANY Geo-EnvironmentalOrrf6ng GEOLOGIST S Carter <br /> w <br /> M <br /> y I'_ <br /> z to <br /> y a -1 Uj J _j GEOLOGIC DESCRIPTION REMARKS <br /> 4 G d <br /> L w o <br /> m a d <br /> o� i _ o <br /> cn c!)Ol � <br /> Pavement - 4' asphalt 2 base rock <br /> CL CLAY (CL) - black (10 YR 2/1) damp medium <br /> plasticity, medium stiff to stiff, 70-80% Clay 20-30% <br /> fine to medium sand, roots <br /> ML <br /> 5 4 <br /> 11 <br /> 0 i5 137-t3 5 SILT (ML) -- dark brown (10 YR 3/3), very stiff, <br /> moist, 90-95% slit, 5-10% fine sand, roots <br /> 10- <br /> 5 <br /> 0 107 BT-115 Color change to dark yellowish brown (10 YR 4/4), <br /> minor oxide staining, roots <br /> 15 8 <br /> 0 20 BT-18 5 Becoming hard light to moderate calcification <br /> 20 11 <br /> 0 28 B7-215 SM SILTY SAND (SM) - dark yellowish brown (10 YR <br /> 4/8), dense, moist, 80-70% fine sand 30-40% silt <br /> minor oxide stains <br /> 25 11 <br /> 0 45 87-28 5 As above <br /> SP <br /> Driller notes hard drilling at 28 to 28 5 feet <br /> 3C 25 <br /> 0 0/5 B7-31 SAND (SP) - grayish brown (10 YR 5/2), very dense, <br /> damp, 95-100% fine sand, trace to 5% silt <br /> S� <br /> SM <br /> 35 <br /> JOB NUMBER 4300 701 Page 1 of 2 <br />