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GROUND ZERO ANALYSIS LOG OF WELL MW5 PROJECT TUFF BOY LOCATION 5151 ALMONDWOOD DRIVE, MANTECA CA PROJECT NO 335 _ DATE DRILLED _]./13/04 LOGGED BY SEAN GARVEY REVIEWED BY DRILLING COMPANY FISCH ENVIRONMENTAL DRILLER DAVE FISCH METHOD HOLLOW STEM AUGER BORE HOLE DIAMETER 8 IN DEPTH DRILLED 20 FT DEPTH TO WATER INITIAL 10 FT STATIC 6.5 FT CASING TYPE PVC DIAMETER 2 IN SCHEDULE 40 INTERVAL 0 FT TO _ 4 FT_ SCREEN TYPE PVC __ DIAMETER 2 IN SLOT SIZE 0.010 IN INTERVAL 4 FT TO 19 FL FILTER PACK TYPE #3SAND- INTERVAL 2.5 FT TO 19 FT_ SURFACE SEAL TYPE NEAT CEMENT OVER BENTONITE INTERVAL 0 FT TO 25 fL COMMENTS CONTINUOUS CORE SAMPLING BY DIRECT PUSH PAGE I OF I WELL DEPTH FID SAMPLE ID USC DESCRIPTION DETAIL FT pPM) BLOWCOUNT LOG 0-03. ASPHALT 0 3'-8' WELL GRADED SAND W/ SILT (SW-SM) 85-90% FN-CRS, A-SR, W 2 GRDD SND, 10-15% F S BRN, NO O bR, MST-WET 30 - 4-SW-SM 6 26 TBMW5-8 8 8'-12' WELL GRADED SAND (SW), >95% FN-CRS, A-SR, W GRDD SND, <5X FNS, BRN, NO ODOR, WET 10 20 SW 12 12'-16' SILT (ML), <5% SND, >95X FNS N DRY STRGTH, R DLTNCY, L TGHNESS, N PLAST, BRN, NO ODOR, WET 14 35 ML 16 16'-195' WELL GRADED SAND (SW), >95X FN-CRS, A-SR, W GRDD SND, <5% FNS, BRN, NO ODOR, WET 18 43 SW TBMW5-20 20 43 — 19 5'-20' SILT (ML), <5% FN-CRS, A-SR, SND, >95X FNS, N DRY STRGTH, R DLTNCY, L TGHNESS, N PLAST, BRN, NO ODOR, WET —22- -24- -26- 28— _30- 32- -34- 36— _38- 40 2242628303234363840