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GROUND ZERO ANALYSIS LOG OF WELL MW4 PROJECT GABBARD LOCATION 640 NORTH ELDORADO, STOCKTON CA PROJECT NO. 256 DATE DRILLED 12/14/00 LOGGED BY SEAN GARVEY REVIEWED BY JOHN P. LANE RG No. 6795 DRILLING COMPANY CASCADE ENVIRONMENTAL DRILLER ERNEST GUTIERRE2 METHOD HOLLOW STEM AUGER BORE HOLE DIAMETER a IN DEPTH DRILLED 32 FT DEPTH TO WATER : INITIAL 25.5 FT STATIC 22.0 FT CASING TYPE PVC F480 DIAMETER 2 IN SCHEDULE 40 INTERVAL 0 FT TO 7 FT SCREEN TYPE PVC F480 DIAMETER 2 IN SLOT SIZE 0 010 IN INTERVAL 7 FT TO 32 FT FILTER PACK TYPE 2/12 SAN12 INTERVAL 5 FT TO 32 FT SURFACE SEAL TYPE 2' BENTONITE• 3' CONCRETE INTERVAL 0 FT TO 5 FT COMMENTS: PAGE 1 OF-1— WELL F1WELL DEPTH FID SAMPLE ID U.S.C. DESCRIPTION DETAIL FT. PPM BLOWCOUNT LOG 2 0-6/9.5' LEAN CLAY (CL): 0-5% FN, A SND; 95-IDO% FNS,.H fog DRY STRNGTH. N DLTNCY, M TGHNSS. M PLST. 9RN, NPO. DRY 4 CL 1 0 2 2B 6 4 i i — = g i — i 10 36 0 50 6/9,5-16/19.5' SANDY LEAN CLAY (CL): 20-30% FN. A. PRLY GRDD SND; 70-80% FNS, M-H DRY STRNGTH, N-SLW DLTNCY, M-H TGHNSS, M-H PLST, BRN. NPO, DRY 12 CL _14- 27 0 33 16 45 16/19.5-21/24.5' SILTY CLAY (CL/ML): 10-15% FN, A SND; 85-90% FNS, 18 M DRY STRNGTH, SLW DLTNCY, M TGHNSS, M PLST, BRN, NPO, MST GAB-MW4-20' 20 IS CL/ML 20 0 28 22 21/24.5-26/29.5' SILT (ML): D-5% FN, A SND; 95-100% FNS, N DRY 24 STRNGTH, R DLTNCY, L TGHNSS. N PLST, BRN, NPO 23 27 ML 26 0 50 = 28 30 16 SW 26/29.5-31.5' WELL GRADED SAND (SW): 95-100% FN-CRS, A-SR, W 0 2p GRDD SND; 0-5% FNS, BRN/WHT, NPO, WET — 18 32 0 23 ML 31.5-32' SILT (ML): 5-10% SND; 90-95% F! Ip��Y TH, R DLTNCY, L TGHNSS. N PLST, B ,` ,"iA5T C0 34 ¢ JOHN P. 36 . LANE No. 6795 4 38 "S"J, Qc� SOF OA4aFG 40