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Table 1 <br /> Groundwater Monitoring Data and Analytical Results <br /> Chevron Service Station#9-6171 <br /> 6633 Pacific Avenue <br /> € i Stockton,California <br /> E� <br /> EXPLANATIONS <br /> a <br /> Groundwater monitoring data and laboratory analytical results prior to May 22,2000,were compiled from reports prepared by Blaine Tech Services,Inc <br /> E <br /> TOC=Top of Casing € B=Benzene TOG=Total Oil&Grease <br /> (ft)=Feet T=Toluene (ppb)=Parts per billion <br /> GWE=Groundwater Elevation E=,Ethylbenzene --=Not Measured/Not Analyzed <br /> (msi)—Mean sea level X=Xylenes QA=Quality Assurance/Trip Blank <br /> DTW=Depth to Water MTBE=Methyl tertiary butyl ether <br /> TPH-G=Total Petroleum Hydrocarbons as Gasoline EDB=Ethylene Dibromide <br /> * TOC elevations were surveyed in July of 2001,by Morrow Surveying Elevations are based on San Joaquin County Benchmark 12,a brass disc marking <br /> k 11 <br /> cos monument stamped"IN-4",in monument box on the east side of Pacific Avenue at the approximate centerline Benjamin Holt Drive,(Elevation= 11 02) <br /> E Chromatogram pattern indicates an unidentified hydrocarbon <br /> s Chromatogram patte7 indicates a gas and unidentified hydrocarbon 11 <br /> 3 Confirmation run " <br /> 4 Laboratory report indicates Bis=(2-Ethylhexyl)-Phthalate was detected at 15 ppb and Butyl-Benzy]-Phthalate was detected at 9 9 ppb <br /> 511 <br /> Gasoline range concentration reported peaks are representative of tetrachloroethane and trace amount of gasoline <br /> 1 � I <br /> e Laboratory report indicates discrete peaks <br /> ' MTBE by EPA Method 8260 <br /> 1 <br /> s MTBE by EPA Method 8260 was analyzed outside the EPA recommended holding time <br /> 9 Survey data unavailable <br /> 10 BTEX and MTBE byEPA Method 8260 t E <br /> i€ Laboratory report indicates the reported value for Toluene is suspected system contamination <br /> r ' <br /> E <br /> I <br /> i <br /> 9-6171 05121 Ale113104 <br />