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a Cumulative Table of Well Data and Analytical Results Vertical Measurements are in feel Anal I results are In E2rts per billion(ppb) z Well Ground Depth DATE Head Water To Notes TPH- Benzene Toluene Ethyl- Xylene Fecal MTBE ' Elev. Elev. Water Gasoline Benzene Coliform MW-7 12/28/95 11.08 -23.03 34.11 he 05/16/96 11.08 -22.12 33.20 -- 9700 350 97 750 880 -- <125 08/21/96 11.08 09/24/96 11.08 -19.59 30.67 -- 9800 450 66 790 500 - 110 11/06/96 11.08 -19.93 31.01 -- 8200 290 28 470 380 -» 54 'r 02/27/97 11.08 -14.74 25.82 -- 8700 340 51 510 390 - <100 05120/97 11.08 -15.30 26.38 -- 8200 296 60 460 410 - 110 09/02/97 11.08 -16.12 27.20 -- 6400 230 35 400 260 - 23 TRIP BLANK r1 11/22/94 -- -- -- <50 <0.5 <0.5 <0.5 <0.5 - - 02/24/95 -- .. __ <50 <0.5 <0.5 <0.5 <0.5 I'; 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 I° 08/21/96 -- - - __ <50 <0.5 <0.5 <0.5 <0.5 - - 09/24/96 -- -- -- - <50 <0.5 <0.5 <0.5 <0.5 11/06/96 - -- -- <50 <0.5 <0.5 <0.5 <0.5 - <2.5 02/27/97 -- -- -- -- <50 <0.5 <0.5 4.5 <0.5 - d.5 05/20/97 -- -- -- -- <50 <0.5 4.5 <0.5 <0.5 - <2.5 '. 09/02/97 - -- -- -- <50 <0.5 4.5 <0.5 <0.5 -- <2.5 , 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 1228/95 and resurvey information Is drawn from the Groundwater Technology, Inc. report. AUBREVIATIONS: TPH-Total Petroleum Hydrocarbons ND= Not detected at or above the minimum quantitatlon limit. See laboratory reports for minimum quantitation limits. MTBE Methyl t-butyl ether i r i k� r Blaine Tees Servioas,Inc.970902-F-i 3rd-01997 Monitoring at Chevron 9-0557 139 S.Center 5t.,Stocl aon,CA 6