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GROUND ZERO ANALYSIS LOG OF BORING SB25/VAPOR WELL VW6 PROJECT KNOWLES—ROEK LOCATION 102 S. WILSON WAY, STOCKTON CA PROJECT NO. 95-008 DATE DRILLED 10/06/95 LOGGED BY LOIS FRANK REVIEWED BY GREG P STAHL R• NO 5023 DRILLING COMPANY SPECTRUM EXPLORATION DRILLER DOUG SHEARER/RANDY NORTON METHOD Nrninw ,,u AIIrF9 BORE HOLE DIAMETER 10 IN DEPTH DRILLED 60 FT DEPTH TO WATER : INITIAL NA FT STATIC FT CASING TYPE PVC F480 DIAMETER 4 IN SCHEDULE 40 INTERVAL 0 FT TO 30 FT SCREEN TYPE PVC F460 DIAMETER 4 IN SLOT SIZE 0.10 IN INTERVAL 30 FT TO so FT FILTER PACK TYPE PEA GRAVEL INTERVAL 2B FT TO 60 FT SURFACE SEAL TYPE NEAT CEMENT OVER BENTONITE INTERVAL o FT TO 28 FT COMMENTS: PAGE 1 OFA_ WELL I DEPTH PID SAMPLE 10 U.S.C. DESCRIPTION DETAIL FT. PPM BLOWCOUNT LOG 2 0-11.5/15' ELASTIC SILT/LEAN CLAY: 5% FN, SA—SR, PRLY GRDD SND; IPA 95% FNS; M—H DRY STRNGTH; N—SLW DLTNCY; M—H TGHNSS; M—H PLST; STIFF; BRN—BLK-. NPO; DRY—MST; WEAK CEMENT- 4 ATION; HOMO: CaCO3 0 MH/CL 3 6 5 8 8 10 0 SB25-10.5' 6 12 Is 12- 14— 71.5/15-28' ELASTIC SILT; 5% FN, SA—SR, PRLY GRDD SND; 95% FNS; 58M DRY STRNGTH; N—SLW DLTNCY; L—M TGHNSS; M—H PLST; 4 STIFF; DRY—MST; WEAK CEMENTATION; HOMO; YLLW BRN; 16 8 N—SL PO r 4 18 MH 20 B1 5825-20.5' 4 7 12 22 24 71 3 26 pp 26-26.5/30' POORLY GRADED SAND; 95% FN—M, SA—SR, PRLY GRDD SND; 5P M DNS; 5% FNS; CRY BRN; M PO; ORY—MST; WEAK CEMENTATION; HOMO 28- 26.5/30-31.5/35- ELASTIC SILT; 10% FN. SA—SR. PRLY GRDD SND; 90% FNS; M DRY STRNGTH; SLW DLTNCY; L—M TGHNSS; M—H PLST: STIFF—V STIFF; YLLW BRN; M—STRNG PO; MST: M CEMENT- - 30 SB25-30.5' ATION; HOMO >2500 4 12 NH 15 —32- 140 4— 31.5/35-41.5' SILTY SAND; 65% FN—M, SA—SR. PRLY GRDD SND; M DNS; 15% FNS; YLLW BRN; M—STRNG P0; MST; M CEMENTATION; >2500 4 HOMO 36 6 38SM >2500