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0 <br /> TABLE 1 <br /> GROUND WATER MONITORING DATA ` <br /> E <br /> ARCO Service Station No.5469 <br /> 130 South Wilson Way,Stockton,California <br /> I <br /> Elevation Top of Well Static Water Groundwater Groundwater <br /> Well Top of Casing Screen Ethyl- Total <br /> Level Elevation Flow TPHG Benzene Toluene benzene Xylene MTBE[I] <br /> Number Date feet ms?) feet b s feet b s feet msl Direction ug/L.. r / L <br /> MW-8 96/25/01 16.46L ti L L <br /> 33 38.]0 21.64 E-NE NS NS NS N5 NS NS I <br /> Y 06/28/01 16.46 38.23 -21.77 NC <5000[61 2,300 <50[6] <50[6] <50[6] 1,600[2] <br /> P 09!14101 16.46 39.63 -23.17 NE <2,000[7) 980 7 <20[71 <20[7] <20[71 7,500[21 <br /> P 12/14/01 16.46 40.72 -24.26 NE 29,00018119118,000[91 640[9] 120[9] 470[9] 17,000[21 <br /> P 02/21/02 16.46 40.39 -23.93 E-NE 30,000 15,000 <200] <200] <20] 22,000[2] <br /> P 04/23/02 16.41 40.48 -24.02 NE 27,000[8] 16,000 <200 <200 <200 26,000[2][101 <br /> I <br /> MW-9 06/25/01 IG.21 59 37.91 -21.70 E-NE NS <br /> P 06/28/01 16.21 NS NS NS NS NS <br /> 38.05 -21.84 NC <50 <0.5 <0.5 <0.5 <0.5 <2.0[2] <br /> P 09/14/01 t6.21 39.51 -23.30 NE <50 <0.5 <0.5 <0.5 <p.5 <2.0[2] <br /> Y 12114/01 16.21 40.46 -24.25 NE <50 <D.SD <0.50 <0.50 <D..5 <2.0[2] <br /> P 02/21/02 16.21 40.64 -24.43 E-NE <50 3.3 <0.50 <0.50 < <br /> P 04/23/02 16.2 t 40.25 -24.04 NE 59[81 <0.50 <0.50 <0.50 <0.50 <0.50[2] <br /> 0.50 <0.50[2] I <br /> L <br /> 06/25/01 16.40 59 38.00 -21.60 E-NL NS NS NS NS NS NS <br /> 06/28/01 16.40 38.18 -21.78 NC <50 51 m.5 <0.5 <0.5 2 N3 <br /> 09/14/01 16.40 39.64 -23.24 NE 88 4.1 <0.5 <0.5 <0.5 44[2] <br /> 12114/01 16.40 40.52 -24.12 NE 77181 <0.50 <0.50 <0.50 <0.50 35[2] <br /> 02/21/02 16.40 40.50 -24.10 E-NE <50 1.2 <0.50 <0.50 <0.50 27[2] <br /> 04/23/02 16.40 40.47 -24.07 NE <50 1.2 <0.50 <br /> 0.50 <0.50 35[2] <br /> NS Q Not sampled <br /> bgs below ground surface NA Not analyzed <br /> pgll .micrograms per lifer <=Below detection limit for the analytical methods used. <br /> [7)MTBE was analyzed using USEPA Method 8020. <br /> NC-Not calculated <br /> 121 MTBE was analyzed using USEPA Method 8260. (10]The sample was diluted due to the presence ofhigh levels of target analytes resulting in elevated reporting limits <br /> [31 The value reported exceeds the calibration curve,but not the linear range. <br /> [41 Chromatogram Patient: Weathered Gasoline C6-C12. <br /> [5]The reporting limits for this satnpte have been raised due to the high level of a target compound. <br /> [6]The reporting limits)for this sample have been raised due to high levels ofnoa-target inieferents. <br /> [7]Sample was diluted due to high Levels of Benzene. <br /> [8]Hydrocarbon pattern is present in the requested fuel quantitation range but does not resemble the pattern of the requested fuel. <br /> [9]Sample was reanalyzed past EPA recommended holding time. <br /> I i <br /> Arco_5469_Quarterly Data <br /> 3 of 3 <br /> I <br />