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Cumulative Table of Well Data and Analytical Results Vertical Measurements are in feet Analytical results are In pans per billion b Well Ground Depth DATE Head Water To Notes TPH- Benzene Toluene Ethyl- Xylene TPM- MTBE Elev Elev Water Gasoline Benzene Diesel MW-1 02/12/96 7145 3987 31 58 -- ND ND ND ND ND ND ND 05/24/96 7145 4271 2874 -- <50 <0 5 064 <0 5 <0 5 2 8 08/22/96 7145 39 74 31 71 <50 <0 5 <0 5 <0 5 <0 5 -- <2 5 11/05/96 7145 39 74 31 33 -- <50 <0 5 <0 5 <0 5 <0 5 -- <2 5 MW-2 02/12/96 7274 3994 3280 -- ND ND ND ND ND NO ND 05/24/96 7274 42 56 3018 -- <50 064 1 5 <0 5 073 -- 13 08/22/96 72 74 3998 3276 -- <50 <0 5 <0 5 <0 5 <0 5 -- <2 5 11/05/96 7274 3998 3265 -- <50 <0 5 <0 5 <0 5 <0 5 -- <2 5 MW-3 02/12/96 6953 3991 2962 -- ND NO NO ND ND ND ND 05/24/96 69 53 4279 2674 -- <50 <0 5 <0 5 <0 5 <0 5 -- <2 5 08/22/96 69 53 39 82 2971 -- <50 <0 5 <0 5 <0 5 <0 5 -- <2 5 11/05/96 6953 -- -- Inaccessible -- -- -- -- -- -- -- MW-4 02/12/96 7088 39 93 3095 -- NO ND ND ND ND NO ND 05/24/96 7088 4275 2613 -- <50 <0 5 <0 5 <0 5 <0 5 -- <2 5 08/22/96 70 88 3970 31 18 -- <50 <0 5 <0 5 <0 5 <0 5 -- <2 5 11/05/96 7088 3970 3078 -- <50 <0 5 <0 5 <0 5 <0 5 -- <2 5 TRIP BLANK 05/24/96 -- -- -- -- <50 <0 5 <0 5 <0 5 <0 5 -- -- 08/22/96 -- -- -- -- <50 <0 5 <0 5 <0 5 <0 5 -- <2 5 11/05/96 -- -- -- -- <50 <0 5 <0 5 <0 5 <0 5 -- -- Note Blaine Tech Services, Inc began routine monitoring of the groundwater wells at this site on May 25, 1996 Earlier field data and analytical results are drawri prom tho May 6, 1996 Pacific Environmental Group, Inc report ABBREVIATIONS. TPH=Total Petroleum Hydrocarbons ND=Not detected at or above the minimum quantitation limit See laboratory reports for minimum quantitation limits MTBE=Mehtyl t-butyl ether Blaine Tech Services,Inc 961105-C-3 4th-Q 1996 Monitoring at Chevron 9-1452 334 East Main St Ripon,CA j