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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-MWI SURFACE ELEVATION NS FT WELLHEAD ELEVATION NS FT DATE DRILLED 06/25/90 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 IN DEPTH DRILLED 80 FT DEPTH TO WATER, INITIAL 63 FT STATIC FT CASING TYPE PVC F480 DIAMETER 2I SCHEDULE 40 INTERVAL 0 FT TO 60 FT SCREEN TYPE PVC F480 DIAMETER 2IN SLOT SIZE 0,0101N INTERVAL 60 FT TO 80 FT FILTER PACK TYPE SAND INTERVAL 58 FT TO 80 FT SURFACE SEAL TYPE NEAT CEMENT OVER BENTONITE INTERVAL 0 FT TO 58 FT NOTES CONTINUOUS SAMPLING WELL DEPTH PID SAMPLE ID U.S.G. SOIL DESCRIPTION DETAIL (FT.) (PPM) BLOWCOUNT LOG 0 0-1.5/2' FAT CLAY; <5% SND; >95% FNSI VH DRY STRNGTH; N-SLV DLTN- CH CY; H TGHNSS; H PLST; HRD; DUSKY YLLW BRW NPO; DRG; MST; N HCL REACTION; WEAK CEMENTATION HOMO 2 1.5/2-4.5/5' LEAN CLAY; <30% SND; >70% FNS; VH DRY STRNGTH; SLW DLTN- CL CY; M TGHNSS; H PLST; HRD; DRK YLLV BRN NPO; N ORG; HST; 4 N HCL REACTION; WEAK CEMENTATION; HOMO 4.5/5-9/10.5' CLAYEY SAND; >677 SA-SR, H HRDNSS SND; WELL GRDD; <33% 6 FNS; H-DRK YLLW BRN; NPO; N ORG; HST; N HCL REACTION; WEAK CEMENTATION; HOMO SC 8 9/10.5-14' LEAN CLAY; <5% SND; >957 FNS; H DRY STRNGTH; N-SLV DLTN- 10 CY; H TGHNSS; M PLST; HRD; DUSKY YLLW W/ ORNG STAINING; NPO; N ORG; MST; N HCL REACTION; WEAK CEMENTATION; BLOCKY; DISSEMINATED FEOX STAINING 12 CL 14-14.5/15' ELASTIC SILT; <10% SND; >90% FNS; M DRY STRNGTH; SLW-R DL TNCY; M TGHNSS; L-H PLST; HRD; M-DRK YLLW BRN; NPO; N ORG; 14 MST; N HCL REACTION WEAK CEMENTATION; HOMO HH 14.5/15-17.5' LEAN CLAY; <5% SND; >95% FNS; H DRY STRNGTH; N DLTNCY; M TGHNSS; M PLST; HRD/ M BRN; NPO; N ORG; MST; N HCL REAC- 16 CL TION WEAK CEMENTATION; HOMO 18 ---- 17.5-20.5' LEAN CLAY; <5% SND; >95% FNS; H DRY STRNGTH; SLW DLTNCY; M TGHNSS; H PLST; HRD; DRK YLLV BRN; NPO; N OPG; MST-VET; CL WEAK-STRNG HCL REACTION WEAK-M CEMENTATION; BLOCKY 20 20.5-24' SILT; <5% SND; >957 FNS; L DRY STRNGTH; N-SLV DLTNCY; L TGHNSS; N PLST; HRD; DUSKY YLLW; NPO; N ORG; MST; STRNG 22 ML HCL REACTION; M CEMENTATION BLOCKY; CMTD FRCD CLAY 24 24-27,5' SILT; <5% SND; >957 FNS; L DRY STRNGTH; N-SLW DLTNCY; L TGHNSS; N PLST; HRDj M YLLW BRN; NPIb N ORG; MST; N HCL 26 ML REACTION; VEAK-M CEMENTATION; BLODKY; BLK STAINING 28 27.5-33' LEAN CLAY; <5% SND; >95% FNS; H DRY STRNGTH; SLW DLTNCY; M TGHNSS; H PLST; HRD; M YLLV BRN; NPO; N ORG; HST; N HCL REACTION; WEAK CEMENTATION HOMO; BLK STAINING 30 CL 32 SC 33-34' CLAYEY SAND; >67%„ SA-SR, F-M, M HRDNSS SND; WELL GRDD; 34 <33% FNS; PALE YLLW BRN NPO; N ORG MST; N HCL REACTION CL WEAK CEMENTATION; HOMO 36 34-34.5/35' SANDY LEAN CLAY; <40% SND; >60% FNS; H DRY STRNGTH; R DL- CL TNCY; M TGHNSS; M PLST; HRD; DRK YLLW BRN; NPO; N ORG; MST; N HCL REACTION WEAK CEMENTATION; HOMO; BLK STAINING 38 FEOX STAINING 34.5/35-38/38,5'LEAN CLAY WITH SAND; >20% SND1 <807 FNS; H DRY STRNGTH; 4(] SLV DLTNCY; M TGHNSS; L PLST; HRDI M-DRK YLLV BRN; NPO; N ORG; MST; N HCl REACTION WEAK-M CEMENTATION BLOCKY; BLK STAINING 42 sM 38/38.5-43/44' SILTY SAND; 1801 SR-R, M HRDNSS SND; WELL GRDD; <201 FNS; M YLLW BRN; NPO; N ORG; MST; N HCL REACTION; WEAK CEMEN- TATION; HOMO; FEOX STAINING PAGE 1 OF 2_