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Gettler-Ryan Inc. Log of Boring MW-20 <br /> PROJECT: Tosco (76) Service Station No. 11195 LOCATION: 16500 South Interstate 5, Lathrop, CA <br /> GR PROJECT NO. : 140193.14 CASING ELEVATION: 19.63 feet (MSL) <br /> DATE STARTED: 12/10/02 WL (ft. bgs); 16.0 DATE; 12/10/02 TIME: 11:30 <br /> DATE FINISHED: 12/10/02 WL (ft. bgs); 9.72 DATE, 12/11/02 TIME: 10:10 <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 /> LD cn <br /> J U WELL DIAGRAM <br /> CL = W L) a GEOLOGIC DESCRIPTION <br /> U) JJ S Ca <br /> EL ❑ 30 E a <br /> � _ a a cC o <br /> o` i m cn cn c7 to <br /> Asphalt and base rock - 6 inches thick. T, A- > <br /> SM SILTY SAND WITH GRAVEL (SM) - brown (7.5YR 5/3), <br /> moist, dense; 60% fine sand, 20% silt, 20% gravel. cv <br /> N� c vo <br /> SILTY SAND (SM) - brown (7.5YR 5/3), moist, medium <br /> 4 dense; 75% sand, 25% silt. N =_ <br /> - - o <br /> 0 13 — <br /> SP POORLY GRA❑ED SAND (SP) - strong brown (7.5YR <br /> 5/6), moist, medium dense; 85% medium sand, S% silt. _ <br /> - o = <br /> 0 20 MW-20- <br /> S (10) <br /> W-20-S (10) o = <br /> � = m <br /> 12 4 =_ " <br /> ' SM SILTY SAND (SM) - strong brown (7.5YR 4/6), wet, <br /> .:� medium dense; 75-65% medium sand, 15-25% silt. <br /> In <br /> 0 21 MW-20- <br /> 1B S (15) Q <br /> 16 Color changes to dark brown (7.5YR 3/3), becomes a <br /> 60-70% fine sand, 30-40% silt. ro — <br /> 20 Bottom of boring at 20 feet bgs. <br /> (-x = Converted to equivalent standard penetration <br /> blows/foot,) <br /> 24- <br /> 2H <br /> JOB NUMBER: 140193.14 Page I of I <br />