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C Tab] <br /> Groundwater Monitoring Data and Analytical Results <br /> Chevron Service Station#9-8264 <br /> 3775 Tracy Boulevard <br /> Vertical Measurements are in feet. Tracy,California Analytical results are in parts per billion( Pb) <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-1 <br /> 05/24/96 19.41 9.01 10.40 -- -- -- <50 <50 <0.5 <0.5 <0.5 <0.5 <2.5 <5000 <5.0-<10 <0.5-<5.0 <br /> 08/20/96 19.41 8.03 11.38 -- - -- <50 <50 <0.5 <0.5 <0.5 <0.5 <2.5 12,000 <5.0-<10 <0.5-<1.0 <br /> 11/05/96 19.41 8.56 10.85 -- -- -- <50 <50 <0.5 <0.5 <0.5 <0.5 <2.5 <5000 <5.0-<10 <0.5-<1.0 <br /> 01/07/97 19.41 10.25 9.16 -- -- - <50 <50 <0.5 <0.5 <0.5 <0.5 <2.5 <5000 <5.0-<10 <0.5-<5.0 <br /> 02/07/97 19.41 10.43 8.98 -- -- -- -- <50 <50 <0.5 <0.5 <0.5 <0.5 <2.5 <5000 <0.5-<5.0 <br /> 05/21/97 19.41 8.46 10.95 -- -- -- -- <50 <50 <0.5 <0.5 <0.5 <0.5 <2.5 <5000 - <0.5-<5.0 <br /> 08/27/97 19.41 8.45 10.96 -- -- -- -- <50 <50 <0.5 <0.5 <0.5 <0.5 <2.5 <5000 <5.0-<10 <0.5-<5.0 <br /> 11/24/97 19.41 8.73 10.68 -- - -- -- 110** <50 <0.5 <0.5 <0.5 <0.5 <2.5 <5000 <5.0-<10 <0.5-<5.0 <br /> 02/12/98 19.41 10.47 8.94 -- -- -- -- <50 <50 <0.5 <0.5 <0.5 <0.5 <2.5 <5000 <5.0-<10 <0.5-<5.0 <br /> 06/09/98 19.41 2.58 16.83 -- -- -- -- <50 <50 <0.5 <0.5 <0.5 <0.5 <2.5 <5000 <5.0-<10 <0.5-<5.0 <br /> 08/10/98 19.41 8.46 10.95 -- -- -- - <50 <50 <0.5 <0.5 <0.5 <0.5 <2.5 <5000 <5.0-<10 <0.5-<5.0 <br /> 11/24/98 19.41 8.41 11.00 -- -- -- 60** <50 <0.5 <0.5 <0.5 <0.5 <2.5 37,000 <5.0-<10 <0.5-<5.0 <br /> 03/05/99 19.41 9.19 10.22 - -- -- *** <50 <50 <0.5 <0.5 <0.5 <0.5 <2.0 <5000 <10-<50 <0.5-<5.0 <br /> 06/01/99 19.41 8.65 10.76 -- -- - <50 <50 <0.5 <0.5 <0.5 <0.5 <5.0 <5000 <10-<50 <0.5-<5.0 <br /> 08/30/99 19.41 8.29 11.12 -- -- -- -- <50 <50 <0.5 <0.5 <0.5 <0.5 <2.5 <5000 <5.0-<10 <0.5-<5.0 <br /> 11/23/99 19.41 8.54 10.87 -- -- -- -- <50 <50 <0.5 <0.5 <0.5 <0.5 <2.5 <5000 <5.0-<10 <0.5-<5.0 <br /> 02/02/00 19.41 7.99 11.42 -- -- -- <50 <50 <0.5 <0.5 <0.5 <0.5 <2.5 <5000 <5.0-<10 <0.5-<5.0 <br /> 05/18/00 19.41 8.78 10.63 0.00 -- -- <50 <50 <0.50 <0.50 <0.50 <0.50 <2.5 <5,000 <5.0-<10 <0.50-<2.0 <br /> MW-2 <br /> 05/24/96 18.98 9.07 9.91 -- -- -- -- <50 <50 <0.5 <0.5 <0.5 <0.5 <2.5 -- <br /> 09/20/96 18.98 7.98 11.00 -- -- -- - <50 <50 <0.5 <0.5 <0.5 <0.5 <2.5 - <br /> 11/05/96 18.98 8.29 10.69 -- -- -- - <50 <50 <0.5 <0,5 <0.5 <0.5 <2.5 <br /> 01/07/97 18.98 10.13 8.85 -- - -- <50 <50 <0.5 <0.5 <0.5 <0.5 <2.5 - - <br /> **Chromatogram pattern indicated an unidentified hydrocarbon. <br /> ***insufficient preservative to reduce the sample pH to less than 2. Sample was analyzed within 14 days of sampling,but beyond the 7 days <br /> recommended for Benzene,Toluene,and Ethylbenzene. <br /> 9-8264.xls/#386854 1 As of 05/18/00 <br />