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GROUND ZERO ANALYSIS LOG OF WELL MW1 PROJECT GABBARD LOCATION 640 NORTH ELDORADO, STOCKTON CA PROJECT N0. 256 DATE DRILLED 12/13/00 LOGGED BY SEAN GARVEY REVIEWED BY JOHN P. LANE RG No. 6795 DRILLING COMPANY CASCADE ENVIRONMENTAL DRILLER ERNEST GUTIERREZ METHOD HOLLOW STEM AUGER BORE HOLE DIAMETER a IN DEPTH DRILLED 32 FT DEPTH TO WATER : INITIAL 23.5 FT STATIC 22.6 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 31 FT FILTER PACK TYPE 2/12 SAND INTERVAL 5 FT TO 32 FT SURFACE SEAL TYPE 2' BENTONITE: 3' CONCRETE INTERVAL 0 FT TO 5 FT COMMENTS: PAGE 1 OF i WELL DEPTH FID SAMPLE ID U.S.C. DESCRIPTION DETAIL FT. PPM BLOWCOUNT LOG 2 0-5.5/9.5' LEAN CLAY (CL): 10% FN, A SND; 90% FNS, H DRY 4 STRNGTH, N DLTNCY, M-H TGHNSS, M-H PLST, BRN, NPO, CL DRY 0 28 50 6 5.5/9.5-11/14.5' SILTY CLAY (CL/ML): 5% FN, A SND; 95% FNS, M-H DRY STRNGTH. N-SLW DLTNCY, M-H TGHNSS, M-H PLST• BRN, B NPO. DRY 10 21 0 32 CL/ML 40 12 j If/14.5-16/19.5' SILTY CLAY (CL/ML): 10-15% FN, A SND; 85-90% FNS, M-H DRY STRNGTH, N-SLW DLTNCY, M-H TGHNSS, M-H PLST, BRN, NPO. DRY 14 i 27 0 29 CL/ML 16 50 16/19.5-21/24.5' LEAN CLAY (CL): 5% FN, A SND; 95% FNS, H DRY STRNGTH, 18 N DLTNCY• M-H TGHNSS, M-H PLST• BRN• NPO, MST GAB-MWi-2 ' —_ 20 2! _ 28 CL 0 34 21/24.5-25' SILT (ML): 5% FN, A SND; 95% FNS, N DRY STRNGTH, R 22 DLTNCY, L TGHNSS, N PLST• BRN, NPO, WET 24 ML 30 25-26/29.5' WELL GRADED SAND (SW): 95-100% FN-CRS, A-SR, W 26 0 30 GROG SND; 0-5% FNS, BRN/WHT. NPO, WET SW 28- 26/29.5-32' LEAN CLAY (CLI: 0-5% FN, A SND; 95-100% FNS. H DRY STRNGTH. N DL NCY. M-H TGHNSS, M-H PLST, BRN. NPO, WET 30 f8 23 CL 32 0 216 3 �� D (j �, 0. JOHN P. `fit 34 , LANE No. 6795 38 Op CAQF�� 40