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GEOPROBE SAMPLE COLLECTION AND DESCRIPTION LOG • SITE Agricultural Commissioner's Office BORING ID- SBA 392 South Moffat Blvd Manteca, California Drilling Date August 19, 1999 SAMPLE FID SAMPLE SAMPLE DEPTH SAMPLE READING ID TIME (Feet) TYPE ANALYSES (ppm) USCS SOIL DESCRIPTION S134-10 1300 10 SOIL NA 0 SW SAND Well-graded fine-coarse sand, golden brown,dry, no odor I TPHD, SAND Well-graded medium-coarse SB4-15 1315 15 SOIL TPHGIBTEX 1 SW sand, golden brown, dry, no odor 5 OXYS TPHD, CLAYEY SILT Gray, moist, petroleum 564-20 1345 20 SOIL TPHGIBTEX 60 ML odor 5 OXYS TPHD, SANDY SILT Fine sandy silt,gray,wet, S134-25 1400 25 SOIL TPHGIBTEX 140 SM slight petroleum odor 5 OXYS TPHD, SAND Poorly-graded fine sand,gray, S134-30 1415 30 SOIL TPHGIBTEX 45 SP „yet, slight petroleum odor 5 OXYS S64-35 1435 35 SOIL NA 15 Sp SAND Poorly-graded fine sand,gray, wet, slight petroleum odor TPHD, SANDY GRAVEL Well-graded sandy SB4-43 1500 43 SOIL TPHG/BTEX 0 GW gravel, medium-coarse sand and fine- 5 OXYS medium gravel, gray,wet, no odor Static groundwater at 18 8 feet GROUND TPHD, Collected groundwater-grab sample SB4-GW 1515 188 WATER TPHGIBTEX - - (petroleum sheen) Terminated soil 5 OXYS boring at 43 feet Sealed borehole with neat cement, b tremie NOTES FID=Flame ionization Detector Geologist Joseph Ramage R G #5856 ppm=parts per million Ramage Environmental USCS= Unified Soil Classification System Sample depths are in feet below ground surface Rig Geoprobe 5400 Direct Push Driller David Fisch(C-57#683865 TPHD=Total Petroleum Hydrocarbons-as-Diesel Fisch Environmental ' TPHG =Total Petroleum Hydrocarbons-as-Gasoline BTEX=Benzene,Toluene, Ethylbenzene,Xylenes 5 OXYs=Five Oxygenates(MTBE, ETRE, DIPE,TAME,TBA) NA=Not Submitted for Analysis