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Cumulative Table of Well Data and Analytical Results Vertical Measurements are in feet. Analytical results are in parts per billion b e round Depth DATE Head Water To Notes TPH- Benzene Toluene Ethyl- Xylene Fecal MTBE Elev. Elev. Water Gasoline Benzene Coliform* TRIP BLANK 11/22/94 -- -- -- <50 <0.5 <0.5 <0.5 <0.5 -- 02/24/95 -- -- -- <50 <0.5 <0.5 <0.5 <0.5 - -- 05/16/95 -- -- -- -- <50 <0.5 <0.5 <0.5 <0.5 -- 08/03/95 -- -- -- <50 <0.5 <0.5 <0.5 <0.5 -- 11/16/95 -- -- - <50 <0.5 <0.5 <0.5 <0.5 02/22/96 -- -- -- <50 <0.5 <0.5 <0.5 <0.5 -- 05/07/96 -- -- -- -- <50 <0,5 <0.5 <0.5 <0.5 -- <2,5 08121!96 -- - -- <50 <0.5 <0.5 <0.5 < _- 09/24/96 -- __ __ 0.5 - <50 <0.5 <0.5 <0.5 <0.5 11/06/96 - -- -- -- <50 <0.5 <0.5 <0.5 <0.5 -- <Z,5 j 02/27/97 -- -- -- -- <50 <0.5 <0.5 <0.5 <0.5 -- <2.5 05/20/97 -- -- <50 <0.5 <0.5 <0.5 <0.5 -- <2.5 09/02/97 -- -- - -- <50 <0.5 <0.5 <0.5 <0.5 -- <2.5 11/24/97 -- -- -- <50 <0.5 <0.5 <0.5 <0.5 -- <2.5 02/11/98 -- -- -- <50 <Q.5 <D.5 <0.5 <0.5 -- <2.5 06/09/98 -- -- -- -- <50 <0.5 <0.5 <0.5 <0.5 -- <2.5 07/30/98 -- -- -- -- <50 <0.5 <0.5 <0.5 <0.5 - <2.5 11/10/98 -- -- -- <50 <0.5 <0.5 <0.5 <0.5 -- <2.5 02/17/99 - -- -- -- <50 <0.5 <0.5 <0.5 <0.5 -- <2.5 05/18/99 -- -- - <50 <0.5 <0.5 <0.5 <0.5 -- <2.5 *Fecal coliforms measured in organisms per 100 ml. Note: Blaine Tech Services, Inc. began routine monitoring of the groundwater wells at this site on November 1, 1994. Earlier field data and analytical results are drawn from the August 15, 1994 Groundwater Technology, Inc. report. The 12/28/95 and resurvey information is drawn from the Groundwater Technology, 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= Methyl t-butyl Ether Blaine Tech Services, Inc.990518-C-2 2nd-Q 1999 Monitoring at Chevron 9-0557 139 S.Center St.,Stockton,CA 13