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Tab <br /> Groundwater Monitoring Y Data and Analytical Results <br /> Chevron Service Station#9-8264 <br /> 3775 Tracy Boulevard <br /> 7 <br /> Vertical Measurements are in feet. Tracy,California Analytical results are in parts per billion(ppb) <br /> Well Ground Depth Total <br /> DATE Head Water To SPH SPH SPH Notes TPH- TPH- Benzene Toluene Ethyl- Xylenes MTBE TOG EPA EPA <br /> Elev. Elev. Water Thickness Removed Removed Diesel Gasoline Benzene (EPA 8020) 8270 8010 <br /> MW-4(cont) <br /> 02/12/98 17.89 11.19 6.70 -- -- -- -- 50** <100 <1.0 4.5 <1.0 . 12 190 - <br /> 06/09/98 17.89 3.51 14.38 -- -- -- -- 79** <50 <0.5 <0.5 <0.5 <0.5 570 - - - <br /> r <br /> 08/10/98 17.89 8.46 9.43 -- -- -- -- <50 150 33 1.7 <0.5 2.1 1100 - - <br /> 11/24/98 17.89 8.38 9.51 -- -- -- -- 100** <50 <0.5 <0.5 <0.5 <0.5 650 - - <br /> 03/05/99 17.89 9.14 8.75 -- --. -- 84.7** 54.9 <0.5 <0.5 <0.5 <0.5 62.2 - - <br /> t 06/01/99 17.89 8.42 9.55 0.10 0.05 0.05 -- -- - - -- - -" <br /> 08/30/99 17.72+ 8.26 9.48 0.03 0.05 0.10 -- - - -- - - - - <br /> 11/23/99 17.72 8.46 9.26 -- -- 0.10 -- 45,300** 105,000 590 17,500 3290 . 19,700 9370 - <br /> 02/02/00 17.72 8.80 8.92 -- 0.10 -- 160000** 114,000 735 15,500 2920 17,500 11800 - - <br /> 05/18/00 17.72 8.68 9.04 0.00 -- -- 9802 35,000' 140 3,400 1,200 8,000 3,100 -- -- -- <br /> **Chromatogram pattern indicated an unidentified hydrocarbon. <br /> +Elevation altered due to casing repairs. <br /> TRIP BLANK <br /> 05/24/96 -- - - -- -- -- <50 <0.5 <0.5 <0.5. <0.5 - -- - <br /> 08/20/96 <50 <0.5 <0.5 <0.5 <0.5 - - - <br /> 11/05/96 -- - -- -- -- -- -- - <50 <0.5 <0.5 <0.5 <0.5 - - <br /> 01/07/97 - -- -- -- -- -- - -- <50 <0.5 <0.5 <0.5 <0.5 <2.5 - - <br /> 02/07/97 -- -- - -- -- <50 <0.5 <0.5 <0.5 <0.5 <2.5 - - - <br /> 05/21/97 - - <50 <0.5 <0.5 <0.5 <0.5 <2.5 - - <br /> 08/27/97 -- - _- -• =- -- -- -- <50 <0.5 <0.5 <0.5 <0.5 <2.5 - <br /> 11/24/97 -- -- -- -- -- -- -- <50 <0.5 <0.5 <0.5 <0.5 <2.5 - <br /> 02112!98 - <br /> __ <50 <0.5 <0.5 <0.5 <0.5 <2.5 - <br /> -- -- -- � -- -- -- -- <br /> 06/09/98 =- -- - <50 <0.5 <0.5 <0.5 <0.5 <2.5 - <br /> 08/10/98 - -- - <50 <0.5 <0.5 <0.5 <0.5 <2.5 - <br /> 11/24/98 -- <50 <0.5 <0.5 <0.5 <0.5 <2.5 - - - <br /> 9-8264.xls/#386854 4 As of 05/18/00 <br />