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WATERWORK WELL/BORING LOG PROJECT TRI VALLEY GROVERS-STOCKTON LOCATION 8 MILE ROAD, STOCKTON; CA PROJECT NO. 62103-1 WELL/BORING NO. TVGS-MW3 SURFACE ELEVATION NS FT WELLHEAD ELEVATION NS FT DATE DRILLED 06/26/90 REVIEWED BY RUSSELL W. JUNCAL, RG 3864 LOGGED BY JOHN GIORGI DRILLING COMPANY SPECTRUM EXPLORATION, INC. DRILLER RAY LIVINGSTON METHOD HOLLOW STEM AUGER BORE HOLE DIAMETER 8 I DEPTH DRILLED 81 FT DEPTH TO WATER, INITIAL 62.5FT STATIC FT CASING TYPE PVC F480 DIAMETER 2 I SCHEDULE 40 INTERVAL 0 FT TO 57.5 FT SCREEN TYPE PVC F480 DIAMETER 27N SLOT SIZE 0.00 1N INTERVAL 57.5 FT TO 77.5 FT FILTER PACK TYPE SAND INTERVAL 55.5 FT TO 81 FT SURFACE SEAL TYPE NEAT CEMENT OVER BENTONITE INTERVAL 0 FT TO 55.5 FT NOTES WELL DEPTH PID SAMPLE ID U.S.G. DETAIL (FT.) (PPM) LOWCOUN LOG SOIL DESCRIPTION O 0-5.5' FAT CLAYS <5% SNDJ >95% FNSI VH DRY STRNGTHI N-SLW DLTN- CY; H TGHNSS; H PLSTI HRDI BLK NPOI ORGI DRYS N HCL REAC- 2 TION M CEMENTATION HOMO CH 4 5.5-6.3' SILTY SAND; >60Y„ SA-SR-R, M HRDNSS SNDA WELL GRDD; <40% 6 SM FNSI FIRMI DRK YLLW BRW NPO; N ORG; MST; N HCL REACTION WEAK CEMENTATIONI HOMO; FEDX STAINING 8 6.3-16' ELASTIC SILT; <5% SNDj >95% FNSi L DRY STRNGTW N DLTNCYj M TGHNSS; M PLSTI FIRMI DRK YLLW BRN; NPOj N ORGI MSTI N 1O HCL REACTIONS WEAK CEMENTATION; HOHOI FEDX STAININGI V SND LENSE AT 15.3' MH 12 14 16 16-16.5/20' POORLY GRADED SANDS >95%, SA-SR-R, F-M, M HRDNSS SNDA PR- LY GRDD; <5% FNSI M-DRK YLLW BRNI NPO; N ORG; MSTI N HCL 18 SP REACTION WEAK CEMENTATION;HOMOI FEDX STAIN E CONTACT 16' 16.5/20-21.5/25' LEAN-FAT CLAYI <5% SNDI >95L FNSI H DRY STRNGT4 SLV DL- 20TNCYI M-H TGHNSS; M PLSTI HRDj DRK YLLW BRN NPO; N ORG MSTI N-WEAK HCL REACTION; WEAK CEMENTATION HOMI71 FEDX CL/CH STAINING; BLK STAININGI TR WHT VEINING 22 21.5/25-26.5/30'LEAN CLAY; <57. SND; >95% FNS; M DRY STRNGTW SLW DLTNCYj M TGHNSS; M PLSTI HRDI DRK YLLV BRNI NPQ N ORGI MSTI N- WEAK HCL REACTION WEAK-M CEMENTATION; HOMOI WHT VEIN- 24 INGI 1' SND LENSEI TR BLK STAINING 26 CL 26.5/30-36.5/40'ELASTIC SILTS <5% SND; >95% FNSI L DRY STRNGTHI SLW-R DL- TNCYI M TGHNSS; M PLSTI HRD; LT-DRK YLLW BRNI NPO; N ORG; 2H HSTF N-VEAK HCL REACTION; VEAK-M CEMENTATION; HOMO TR BLK STAININGu WHT VEINING PROMINENT; MTTLD FEDX AND BLK STAINING 30 32 MH 34 - 36 36.5/40-41' LEAN CLAYS <27.. SND; >997 FNS; H DRY STRNGTHI SLV DLTNCYI M TGHNSS; M-H PLSTI HRDI DRK YLLW BRN NPO; N ORG; MSTI N 38 HCL REACTION WEAK CEMENTATION HOMO; FEDX AND ELK STAIN 40 CL 41-46.5/50' CLAYEY SANDS >60-70%, SR-R, F-M, M HRDNSS SND; WELL GRDD; 42 SC <30-40% FNSI M YLLW BRN NPOi N ORG; MSTI N HCL REACTION; WEAK CEMENTATION; HOMO; FEDX STAINING PAGE OF 2