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T 1 <br /> Groundwater Monitoring4wa and Analytical Results <br /> Chevron Service Station#9-6171 <br /> 6633 Pacific Avenue <br /> Stockton,California <br /> EXPLANATIONS <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 /> ft =Feet T=Toluene (ppb)=Parts per billion <br /> GWE=Groundwater Elevation E=Ethylbcnzenc --=Not Measured/Not Analyzed <br /> ( <br /> msl)=Mean sea level X=Xylenes QA=Quality Assurance/Tnp 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 /> 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 /> i Chromatogram pattern indicates an unidentified hydrocarbon <br /> Chromatogram pattern indicates a gas and unidentified hydrocarbon <br /> 3 Confirmation run <br /> ° Laboratory report indicates Bis-(2-Ethylhexyl)-Phthalate was detected at 15 ppb and Butyl-Benzyl-Phthalate was detected at 9 9 ppb <br /> 5 Gasoline range concentration reported,peaks are representative of tetrachloroethane and trace amount of gasoline <br /> 6 Laboratory report indicates discrete peaks <br /> 7 MTBE by EPA Method 8260 <br /> S MTBE by EPA Method 8260 was analyzed outside the EPA recommended holding time <br /> 9 Survey data unavailable <br /> 1° BTEX and MTBE by EPA Method 8260 <br /> 9 6171 xis/#385121 19 As of 07/15/03 <br />