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TABLE 2 <br /> Historical Groundwater Monitoring & Analytical Data <br /> ARCO Service Station No, 2130 <br /> 7906 N. EL Dorado Street, Stockton, CA <br /> Notes: <br /> GRO = Gasoline range organics <br /> B = Benzene <br /> T = Toluene <br /> E = Ethylbenzene <br /> X = Total xylenes <br /> MTBE = Methyl tert-butyl ether <br /> TBA = Tert-butyl alcohol <br /> DIPE = Di-isopropyl ether <br /> ETBE = Ethyl tert-butyl ether <br /> TAME = Tert-amyl methyl ether <br /> 1 ,2-DCA = 1 ,2 Dichloroethane <br /> EDB = 1 ,2-Dibromoethane <br /> P/NP = Purged/Not Purged <br /> D. O. = Dissolved Oxygen <br /> DTW = Depth to Water <br /> GWE = Calculated groundwater elevation = TOC - Depth to Water + 0.75'(Measured SPH Thickness); assuming a specific gravity of 0.75 for SPH <br /> SPH = Separate phase hydrocarbons <br /> TOC = Top of casing (surveyed) <br /> ft-MSL = feet above mean sea level <br /> pg/L = Micrograms per liter <br /> < = Analyte was not detected above the specified method reporting limit <br /> - = Not measured or analyzed <br /> = Raised method reporting limit (MRL) due to high analyte concentration requiring sample dilution. <br /> ' = Raised MRL due to matrix interference . <br /> ' = The sample contains discrete non-fuel components eluting in the gasoline range, quantified as gasoline. <br /> The chromatogram does not match the typical gasoline fingerprint. <br /> [1 ] = Not sampled, as well is scheduled to be abandoned . <br /> [2] MtBE was analyzed using USEPA Method 8260B. <br /> [3] Chromatogram Pattern Weathered Gasoline Cl <br /> [4] Benzene, toluene, ethylbenzene and total xylenes were analyzed using USEPA Method 8260B. <br /> [5] Chromatogram Pattern : Unidentified Hydrocarbons C6-C12 <br /> [6] Hydrocarbon pattern is present in the requested quantitation range but does not resemble the pattern of the requested fuel. <br /> NA = Not analyzed <br /> FP = Free Product <br /> S = Sheen <br /> 02130 4Q06 Tables 1-2.xls Page 23 of 24 SECOR <br />