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i • , <br /> TABLE I <br /> GROUNDWATER MONITORING DATA <br /> Former ARCO Service Station No, 548 <br /> 1612 Hammer Lane, Stockton,California <br /> Well Elevation Static Top Elevation Groundwater <br /> Sample of Top Water of of Flow Ethyl- Total <br /> Number Date of Casing Level Screen Groundwater Direction TPHG Benzene Toluene benzene Xylenes MTBE III Observations <br /> Analytical results in micrograms per liter. P=Purge. <br /> TPHG-Total petroleum hydrocarbons as gasoline. NP=No purge. <br /> MTBE-Methyl tertiary butyl ether. ¢-Below detection limits used by laboratory. <br /> Elevation datum is mean sea level. <br /> Measurements in feet. Sample designations: <br /> NA-Not analyzed. MW-4(34)-Well 1D and sample depth(feet). <br /> NM-Not measured. FP-Free product. <br /> NE-Not evaluated. S- Sheen. <br /> #-Bailer blank. O-Obvious product odor. <br /> -Raised MRL due to matrix interference. <br /> **-The sample contains a lower boiling point hydrocarbon mixture quantified as gasoline;the chromatogram does not match the typical gasoline fingerprint. <br /> ***-Raised MRL due to high analyte concentration requiring sample dilution. <br /> [1)MTBE was analyzed using USEPA Method 8020. <br /> [2)MTBE was analyzed using USEPA Method 8260. <br /> [3]Hydrocarbon pattern is present in the requested fuel quantitation range,but does not resemble the pattern of the requested fuel. <br /> [4]The sample was diluted due to the presence of high levels of target analytes resulting in elevated reporting limits. <br /> [5]The sample was diluted due to the presence of high levels of non-target analytes resulting in elevated reporting limits. <br /> 1 <br /> Arco_0548_Quarter1y_Data.X[S <br /> 10 of 10 <br />