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Ta <br /> Groundwater Monitoring Mand Analytical Results <br /> Chevron Service Station#9-0557 <br /> 139 South Center Street <br /> Stockton,California <br /> EXPLANATIONS: <br /> Groundwater monitoring data and laboratory analytical results prior to May 17,2000,were compiled from reports prepared by Blaine Tech Services,Inc. <br /> TOC=Top of Casing TPH-G=Total Petroleum Hydrocarbons as Gasoline (pph)=Parts per billion <br /> (ft.)=Feet B=Benzene ND=Not Detected <br /> GWE=Groundwater Elevation T=Toluene =Not Measured/Not Analyzed <br /> (msl)=Mean sea level E=Ethylbenzene <br /> DTW=Depth to Water X=Xylenes <br /> SPHT=Separate-Phase Hydrocarbon Thickness MTBE=Methyl tertiary butyl ether <br /> ** GWE was corrected for the presence of SPH; correction factor: [(TOC-DTW)+(SPHT x 0.80)1. <br /> ' Fecal coliforms measured in organisms per 100 milliliters(ml). <br /> 2 Chromatogram pattern indicates an unidentified hydrocarbon. <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 /> 5 Laboratory report indicates unidentified hydrocarbons C6-C12. <br /> b Laboratory report indicates weathered gasoline C6-Ci 2. <br /> 7 Laboratory report indicates gasoline C6-CI 2+unidentified hydrocarbons<C6. <br /> s Laboratory report indicates gasoline C6-C12. <br /> Laboratory report indicates constituents were analyzed by EPA Method 8260. <br /> 9-0557.x]V#386843 13 As of 07/16/01 <br />