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Table 1 <br /> Groundwater Monitoring Data and Analytical Results <br /> Chevron Service Station#9-6171 <br /> # 6633 Pacific Avenue <br /> Stockton,California <br /> EXPLANATIONS <br /> 'I - <br /> Groundwater monitoring data and laboratory analytical results prior to May 22,2000,were compiled from reports prepared by Blaine Tech Services,Inc <br /> TOC=Top of Casing B=Benzene TOG=Total Oil&Grease <br /> ({l)—Feet T=Toluene (ppb)=Parts per billioin <br /> GWE=Groundwater Elevation ' i E=Ethylbenzene --=Not Measured/Not Analyzed <br /> (msl)=Mean sea level H X=Xylenes QA=Quality Assurance/Tnp Blank <br /> DTW=Depth to Water f 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 /> cos monument stamped"IN-V in monument box on the east side of Pacific Avenue at the approximate centerline Benjamin Holt Drive,(Elevation= 11 02) <br /> Chromatogram pattern indicates an unidentified hydrocarbon <br /> r <br /> Chromatogram pattern indicates a gas and unidentified hydrocarbon t <br /> 3 Confirmation run i <br /> Laboratory report indicates Bis-(2-Ethylhexyl)-Phthalate was detected at 15 ppb and Butyl-Benzyl-Phthalate was detected at 9 9 ppb <br /> s Gasoline range concentration reported,peaks are representative of tetrachloroethane and trace amount of gasoline <br /> c Laboratory report indicates discrete peaks i r <br /> 7 MTBE by EPA Method 8260 <br /> a MTBE by EPA Method 8260 was analyzed outside the EPA recommended holding time - <br /> 9 Survey data unavailable IIS II <br /> 10 BTEX and MTBE by EPA Method 8260 <br /> ii Laboratory report indicates the reported value for Toluene is suspected system contamination <br /> „ t <br /> i <br /> , 1f <br /> i ' I <br /> r <br /> t - <br /> f <br /> I 1 <br /> i <br /> 3 <br /> i <br /> 9-6171 085121 0 Ale/13/04 <br /> l <br />