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Table 1 <br /> Groundwater Monitoring Data <br /> 1995 to Present <br /> ARCO Service Station No 2130 <br /> 7906 North EI Dorado Street, Stockton, California <br /> Elevation Static Water Groundwater Ethyl- Total <br /> Well Top of Casing Top of Screen Level Elevation TPHG Benzene Toluene benzene Xylene MTBE <br /> Number Date (feet msl) (feet bgs) feet bgs) (feet msl) ug1L pg/L g/L L L <br /> F L Observations <br /> VW-8 05/20/97 NM 4000 4481 NE 25,000 480 290 260 3,900 <120* No FP,No S <br /> VW-8 09/01/98 NM 4023 NE NA NA NA NA NA NA NA <br /> VW-8 12/02/98 NM 3869 NE NA NA NA NA NA NA NA <br /> VW-8 03/31/99 NM 3750 NE NA NA NA NA NA NA NA <br /> VW-8 06/04/99 NM 3656 NE NA NA NA NA NA NA NA <br /> VW-8 09/02/99 NM 4099 NE NA NA NA NA NA NA NA <br /> VW-8 11/29/99 NM 3914 NE NA NA NA NA NA NA NA <br /> VW-8 03/16/00 NM 3524 NE NA NA NA NA NA NA NA <br /> VW-8 06/26/00 NM 3780 NE NA NA NA NA NA NA NA <br /> VW-8 09/28/00 NM 42 03 NE NA NA NA NA NA NA NA <br /> VW-12 05/20/97 NM 55 00 4378 NE 1,500 150 1 58 <1* <6* No FP,No S <br /> VW-12 09/01/98 NM 4065 NE NA NA NA NA NA NA NA <br /> VW-12 12/02/98 NM 3766 NE NA NA NA NA NA NA NA <br /> VW-12 03/31/99 NM 3757 NE NA NA NA NA NA NA NA <br /> VW-12 06/04/99 NM 35 36 NE NA NA NA NA NA NA NA <br /> VW-12 09/02/99 NM 3993 NE NA NA NA NA NA NA NA <br /> VW-12 11/29/99 NM 38 09 NE NA NA NA NA NA NA NA <br /> VW-12 03/16/00 NM 3423 NE NA NA NA NA NA NA NA <br /> VW-12 06/26/00 NM 3668 NE NA NA NA NA NA NA NA <br /> VW-12 09/28/00 NM 4094 NE NA NA NA NA NA NA NA <br /> ms]=mean sea level [I Not sampled,as well is scheduled to be abandoned <br /> bgs=below ground surface [21 MTBE was analyzed using US EPA Method 8260 <br /> pg/L=Analytical results in micrograms per liter [3)Chromatogram Pattern Weathered Gasoline C6-C12 <br /> MTBE was analyzed using USEPA Method 8020 NE=Not evaluated <br /> =Below detection limit for the analytic methods used NA—Not analyzed <br /> *—Raised method reporting limit(MRL)due to high analyte concentration requiring sample dilul€on FP=Free product <br /> **=Raised MRL due to matrix interference S=Sheen <br /> ***=The sample contains discrete non-fuel components eluting to the gasoline range quantified as gasoline <br /> The chromatogram does not match the typical gasoline fingerprint <br /> PAVILION1MyDocumentslARCOU 1301QTRLY1200012130Q300 Delta <br /> Page 10 of 10 11/22100 <br />