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GROUND' ZERO ANALYSIS- LOG OF WELL MW7 PROJECT TUFF BOY LOCATION 5151 ALMONDWOOD DRIVE, MANTECA CA PROJECT NO. 335 DATE DRILLED 1/14/04 LOGGED BY SEAN GARVEY REVIEWED BY DRILLING COMPANY FISCH ENVIRONMENTAL DRILLER RICK BERTILLINO METHOD DIRECT PUSH BORE HOLE DIAMETER .. .., IN DEPTH DRILLED 19 FT DEPTH TO WATER : INITIAL - --8 FT STATIC 6.6 FT CASING TYPE - PVC DIAMETER 3/4 IN SCHEDULE 40 INTERVAL 0 FT TO -_ 4 FT SCREEN TYPE PVC DIAMETER T 3/4 w SLOT SIZE 0.010 IN INTERVAL 4 FT TO 19 FT FILTER PACK TYPE 2/12 INTERVAL 2.5 FT TO 19 FT SURFACE SEAL TYPE NEAT CEMENT OVER BENTONITE INTERVAL ---- -0 - FT TO 2.5 FT COMMENTS: PRE-PACK WELL SCREEN 2 5/8' ANNULAR SEAL CONTINUOUS CORE SAMPLING PAGE I OFA WELL DEPTH FID SAMPLE ID U.S.C. DESCRIPTION DETAIL FT. PPM BLOWCOUNT LOG 0-8' WELL GRADED SAND W/ CLAY (SW-SM); 85-90% FN-CRS, A-SR, W GRDD SND; 10-15% FNS; BRN, N-SL ODOR, MST-WET. 2 3.5 SLIGHT PRODUCT ODOR 4-8 FEET 4 SW-SC 6 250 T13MW7- 8 8'-10' CLAYEY SAND (SC); 80-85% FN-CRS, A-SR, W GRDD SND; 15-20% T13MW7-10 SC FNS; BRN/GRY, M ODOR, WET. 10 448 SW 10'-11' WELL GRADED SAND (SW); >95% FN-CRS, A-SR, W GRDD SND; <5% FNS; BRN/GRY, M ODOR, WET. ML 11'-12' SILT (ML); <5% FN, A. SND; >95% FNS; N DRY STRGTH; R DLTNCY; -12- L TGHNESS; N PIAST; GRY, M ODOR, WET. 12'-16' LEAN CLAY (CL); <5% FN, A. SND; >95X FNS; M-H DRY STRGTH; N- SLW DLTNCY; M-H TGHNESS; M-H PLAST; BRN, N-SL ODOR; MST. 14 21 TBMW7-1 CL 16 16'-17' WELL GRADED SAND (SW); >95% FN-CRS, A-SR, W GROD SND; <5% SW 10 FNS; BRN, NO ODOR, MST. SP 17'-18.9' POORLY GRADED SAND (SP); >95% F, A-SA, P GRDD SND; <5% FNS; 18 TBMW7-1 BRN, NO ODOR, MST. CL 18.9'-19' LEAN CLAY (CL); <5% FN, A, SND; >95% FNS; BRN, NO ODOR. 20- -22-1 24 26- -28- 30 30 GEp� 32 JOHN P. N� 34 LANE No. 67 36 38 40