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Ta <br /> Groundwater Monitoring 16and Analytical Results <br /> Chevron Service Station #9-0557 • <br /> 139 South Center Street <br /> Vertical Measurements are in feet. Stockton,California <br /> Well Ground Depth Analytical results are in parts per billion(ppb) <br /> DATE Head Water To Notes TPH- Benzene Toluene Ethyl- Xylenes MTBE Fecal <br /> Eley. Elev. Water Gasoline Benzene Coliform <br /> MW-8 <br /> 11/24/97 11.28 -16.85 28.13 ** <50 <0.5 <0.5 <0.5 <0.5 Q.5 -- <br /> 02/11/98 11.28 -14.53 25.81 -- 1200 57 9.0 4.7 6.8 <15 _ <br /> 06/09/98 11.28 -10.72 22.00 *** 480 16 2.3 3.0 <50 40.00 <br /> 07/30/98 11.28 -10.62 21.90 -- 160 3.7 0.79 1.9 0.53 <2.5 <br /> 11/10/98 11.28 -11.63 22.91 -- <50 <0.5 <0.5 <0.5 <0.5 <2.5 -- <br /> 02/17/99 11.28 -10.82 22.10 -- 230 26 3.7 2.3 3.0 8.50 <br /> 05/18/99 11.28 -9.92 21.20 -- 400 6.2 4.0 2.3 5.0 22.00 <br /> 08/30/99 11.28 -11.04 22.32 -- <50 <0.5 <0.5 <0.5 <0.5 <5.0 -- <br /> 12/02/99 11.28 -11.71 22.99 -- <50 <0.5 <0.5 <0.5 <0.5 <5.0 <br /> 02/02/00 11.28 -11.53 22.81 <50 <0.5 <0.5 <Q.5 <0.5 <2.5 _- <br /> 05/17/00 11.28 -9.48 20.76 - <50.0 <0.500 <0.500 <0.500 <0,500 <2.50 <br /> 08/14/00 11.28 -10.59 21.87 -- <50 <0.50 <0.50 <0.50 <0.50 <2.5 _ <br /> **Oxygenates by EPA 8260 and Methanol by EPA 8015 were not detected;see lab report for detection limits. <br /> *** Oxygenates by EPA 8260 were not detected;see lab report for detection limits. <br /> I <br /> 9-0557.xls/#386843 14 As of 08/14/00 <br />