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WATERWORK WELL/BORING LOG PROJECT TRI VALLEY GROVERS-STOCKTON L❑CATION 8 MILE ROAD, STOCKTON, CA PROJECT NO, 62103-1 WELL/BORING NO. TVGS-MW2 SURFACE ELEVATI❑N 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 I DEPTH DRILLED 76.5FT DEPTH TO WATER INITIAL 62 FT STATIC 60 FT CASING TYPE PVC F480 DIAMETER 2 I SCHEDULE 40 INTERVAL 0 FT TO S5 FT SCREEN TYPE PVC F480 DIAMETER 21 SLOT SIZE 0,010 IN INTERVAL 55 FT TO 75 FT FILTER PACK TYPE SAND INTERVAL 53 FT TO 75 FT SURFACE SEAL TYPE NEAT CEMENT OVER BENTONITE INTERVAL 0 FT TO 53 FT NOTES WELL DEPTH PID SAMPLE ID U.S.G. SOIL DESCRIPTION DETAIL (FT.) (PPM) BLOWCOUNI LOG 0 0-6.5/10' FAT CLAY; <2Z SND; >98Z FNS; VH DRY STRNGTHI N DLTNCY; M TGHNSS; M PLST) HRDI BRN BLK) NPO; N ORG; MST; N HCL REAC- TION) WEAK CEMENTATION; HOMO; BLK STAINING 2 4 CH 6 6.5/10-10.5LEAN CLAY; <10% SND; >90% FNS; VH DRY STRNGTW SLW DLTNCYI M TGHNSS; M PLST; HRD; DRK YLLW BRN; NPO; N ORG; MST; N HC S REACTION; WEAK CEMENTATION; HOMO C 10 L SM 10.5-11.5/15' SILTY SAND; >60%, SA-SR-R, F, M HRDNSS SND} PRLY GRDD; <40% FNS; V SFTj OLIVE BRW NPOI N ORG) MSTI N HCL REACTION 12 WEAK CEMENTATIONI HOMO; FEOX STAININGI TR BLK STAINING 14 11.5/15-16' LEAN CLAY) <57 SND; >95% FNS; H DRY STRNGTW SLW DLTNCY; M TGHNSS; M PLSTI HRD; OLIVE-DRK BRN-ORNGI NPO; N ORGI MST CL N HCL REACTION; WEAK CEMENTATION; HOMO-STRATIFIED; BLK 16 ---- STAININGI FEOX STAINING SH 16-16.3' LEAN CLAY; <10% SND; >90% FNS; H DRY STRNGTH; SLW DLTNCY; M TGHNSS; M PLSTI HRD; DRK YLLV BRN; NPO; N ORGI MST; N 18 HCL REACTION; WEAK CEMENTATION; HOMO 16.3-16.5/20' SILTY SANDI >80/, SA-SR-R, F, M HRDNSS SND; PRLY GRDD; <20% 2O ML FNS; M YLLW BRNI NPO; N ORG; MST; N HCL REACTION; WEAK CE- MENTATION; HOMO; F SND 22 16.5/20-21.5/25' SILT) <57 SND; >95Z FNS; H DRY STRNGTH; SLW DLTNCY; L TGH- NSS) L PLST; HRDI DRK YLLW BRNI NPO; N ORGI MST; N HCL RE- ACTION; WEAK CEMENTATION; HOMO; WHT VEINING; BLK STAINING 24 26 CL i 21.5/25-26.5/30'LEAN CLAY; <5Z SND) >95% FNS; H DRY STRNGTHI SLW DLTNCY; M TGHNSS; M PLSTI HRD; DRK YLLV BRN; NPO; N ORG) MST; N 28 i� HCL REACTION; WEAK CEMENTATION; HOMO i i i 30 CL 32 /'-26.5/30-31.5/35'LEAN CLAY; <57 SND; >957 FNS) H DRY STRNGTHI SLW DLTNCY; M TGHNSS; M PLSTI FIRMI DRK YLLW BRNI NPO; N ORGI MST; i� STRNG HCL REACTIONI WEAK CEMENTATION; HOMO; BLK STAINING 34 36 CL 31.5/35-36.5/40'LEAN CLAY) <5Z SND) >95Y. FNS; H DRY STRNGTHI SLW DLTNCY; i M TGHNSS) M PLSTI HRD) DRK YLLV BRN; NPO; N ORQ MST; N- STRNG HCl REACTION WEAK-M CEMENTATION WHT VEINING; CAL- 38 AL38 CITE; BLK STAINING 36.5/40-41' LEAN CLAY) <10% SND) >90% FNS) M DRY STRNGTW SLW-R DLTN- 40 CL CYI M TGHNSS) M PLST; HRDI M YLLV BRN; NPOI N ORGI MSTI N ___- HCL REACTION WEAK CEMENTATIONI HOMOI BLK STAINING 42 CL / 41-41.5/45' LEAN CLAY; <10% SND) >90% FNS) M DRY STRNGTHI SLV DLTNCY; / M TGHNSS M PLSTI HRD; M YLLW BRW NPOI N ORGI MST; STRNG HCL REACTION WEAK CEMENTATIONI HOMOI TR BLK STAINING PAGE t OF 2