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Gettler-Ryan. Inc. Log of Boring MW-18 <br /> PROJECT: Tosco (78) Service Station No. 11195 LOCATION: 18500 South Interstate 5, Lathrop, CA <br /> GR PROJECT NO. : 140193.14 CASING ELEVATION: 18.9 feet (MSL) <br /> DATE STARTED: 12/10/02 WL (ft. bgs): 15.0 DATE: 12/10/02 TIME: 08:40 <br /> DATE FINISHED: 12/10/02 WL (ft. bgs): 9.39 DATE: 12/11/02 TIME, 10:00 <br /> DRILLING METHOD: 8 in. Hollow Stem Auger TOTAL DEPTH: 20 feet <br /> DRILLING COMPANY: Cascade Drilling GEOLOGIST: Andrew Smith <br /> LU <br /> * m <br /> C) <br /> -' WELL DIAGRAM <br /> a w C-) GEOLOGIC DESCRIPTION <br /> H d d J <br /> a O O 4 H <br /> 111 w r-iJ Q 4 (D Cn <br /> a m Cr7 (fi C7 [n <br /> Asphalt and base rock - 8 inches thick. n., <br /> SM SILTY SAND WITH GRAVEL ISM} - brown (7.5YR 5/3), �' 'n, n �I <br /> moist, dense; 60% fine sand, 25% gravel, 15% silt. m w <br /> phi <br /> i U <br /> lb <br /> nl� lb <br /> C <br /> fi <br /> 4- <br /> 0 20 Becomes medium dense. = o <br /> — c <br /> — m <br /> 0 18 MW-18- o = a <br /> S (10.5) <br /> U <br /> ` CL CLAY (CL) - grayish brown (IOYR 512), wet, stiff; 95% <br /> clay, 5% silt. <br /> V _ <br /> �'7 -c = <br /> U — <br /> 0 If MW-18- <br /> S (15) <br /> W-18-S (15) N <br /> ML SILT WITH SAND (ML) - grayish brown (10YR 5/2), _ <br /> wet, very stiff; 75-80% silt, I5-20% fine sand. _ <br /> 0 21 m <br /> 20 r <br /> Bottom of boring at 20 feet bgs. <br /> (x = Converted to equivalent standard penetration <br /> blows/foot.) <br /> 24- <br /> 2B- <br /> JOB <br /> 42BJOB NUMBER: 140193.14 Page 1 0f 1 <br />