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`..� low WATERWORK WELLIBORING LAG PROJECT BJJ TRUCKING/STgCKTON LOCATION 2431 EAST MARIPOSA ROAD, STOCKTDN, CA PROJECT NO. 290 WELL/BORING NO. MWI SURFACE ELEVATI❑N NA FT WELLHEAD ELEVATION NA FT DATE DRILLED 01/15/91 REVIEWED BY NORA H. KATA13KA RCE 3B322 LOGGED BY KRYS M. HARDMAN DRILLING COMPANY SPECTRUM EXPLORATION DRILLER RAY LIVINGSTON METHOD HOLLOV STEM AUGER BORE HOLE DIAMETER M 1N DEPTH DRILLED 86,5 FT DEPTH TO WATER: INITIAL 75 FT STATIC 70.4 FT CASING TYPE F480 PVC DIAMETER _ 2 IN SCHEDULE 40 INTERVAL 0 FT TO 65 F7 SCREEN TYPE F480 PVC DIAMETER 2 IN SLOT SIZE 0,010 IN INTERVAL 65 FT TO 85 FT FILTER PACK TYPE #2/12 SILICA SAND INTERVAL_. 63.5 FT TO 85 FT SURFACE SEAL TYPE 2' HYDRATE BENTONITE CHIPS/CEMENT-SAND GROUT INTERVAL 0 FT TO __ 63.5 FT NOTES WELL DEPTH PID AMPLE ID U.S.G. SOIL DESCRIPTION DETAIL (FT.) (PPM) LOWCOUN LOG 0 0-0.5' ASPHALT 2 /GP0.5-0.5/5.0' GRAVEL FILL 0,5/5.0-5.5' LEAN TO FAT CLAY; <5% SND] >957 FNSj VH DRY STRNGTH4N DLTNCY] M-H TGHNSS, M-H PLSTj M STIFF-STIFFI BRN GRYj NPDI ❑RGANICSj DRY-MSTJ WEAK CEMENTATION) HOMO4 6 6 5.5-11.5/15' ELASTIC SILT; <5Z SND; >95% FNSj M DRY STRNGTH; SLW g DLTNCY; L TGHNSS] L PLSTj STIFF) M YLLV BRN] NPOj ORGANICS] MSTI WEAK CEMENTATION] SOME ORGANICS _ 8 MH 10 5 7 12 B 11.5/15,0-15.5' LEAN TO FAT CLAY] <57 SND; >95Z FNSj H-VH DRY STRNGTH; N DLTNCY] M-H TGHNSS; M-H PLSTj STIFF; DUSK YLLW BRNI NPOj ORGANICS] MST) WEAK CEMENTATION] HOMO 14 CL/CH 15.5-20.5' ELASTIC SILTS <57 SNDj >95% FNSj H DRY STRNGTHI SLV 16 e 5 DLTNCYI L-M TGHNSS; M PLSTj STIFFI LT ❑LIVE BRNj NPO 10 ORGANICS; MSTJ WEAK CEMENTATION; MOTTLED; SOME BLK ORGANICS 18 MH 20.5-21.5/25.0' ELASTIC SILT WITH SAND] <10% SA-SR, FN SNDj >90% FNSI M-H DRY STRNGTH] SLW DLTNCY] M TGHNSS] M PLSTI STIFF] LT OLIVE BRN; SL POI MSTJ WEAK CEMENTATION; 20 5 MOTTLED G --- $ MH 215/25.0-26.5/30.0' LEAN CLAYI <5% SNDI >95% FNSj H DRY STRNGTH] N-SLW 22 DLTNCY] M TGHNSS) M-H PLSTj V STIFF] LT OLIVE GRYj SL PO; MSTJ WEAK-M CEMENTAT[ON; HOMO 24 2b.5/30.0-31.0' ELASTIC SILTI <10% SNDj >90% FNSj M-H DRY STRNGTH] 9 SLW DLTNCY] M TGHNSS; M PLSTj V STIFF; M YLLW BRN P6 12 CL & LT OLIVE GRYj SL POj DRY-MSTJ MOTTLED 13 31.0-31.5/35.0' LEAN TO FAT CLAY] <5Z SNDj >95% FNSj H-VH DRY 28 STRNGTH] N DLTNCY] M-H TGHNSS; M-H PLSTj V STIFF] M _ YLLW BRN & LT ❑LIVE GRYj SL PQ) DRY-MST) MOTTLED 30 11 MH 15 16 CL/CH 31.5/35.0-36.5/40.8' ELASTIC SILT] <10Y. SND; >90% FNSj L-M DRY STRNGTH; 32 SLW-R DLTNCY] L-M TGHNSS] L-M PLSTj HRDj LT OLIVE; NPOj MSTJ WEAK CEMENTATION] HOMO; NO RECOVERY FROM 34 12 36 21 MH 30 36,5/40.0-46.0' SILT WITH SAND] <25Z SA-SR, FN, PRLY GRDD SND; >75% FNSj L-M DRY STRNGTH] SLW-R DLTNCY] L TGHNSS) L 38 PLSTj HRDj LT OLIVE; NPO] ORGANICS] MSTJ WEAK CEMENT- ATIONt MOTTLED 40 15 21 42 34 ML PAGE 1 OF 2