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• Ta1 <br /> Groundwater Monitoring and Analytical Results <br /> Chevron Service Station#9-9840 <br /> 4344 Waterloo Road <br /> Stockton,California <br /> EXPLANATIONS <br /> Groundwater monitoring data and laboratory analytical results prior to June 22,2000,were compiled from reports prepared by Blaine Tech Services,Inc <br /> TOC=Top of Casing TPH-G=Total Petroleum Hydrocarbons as Gasoline MTBE=Methyl tertiary butyl ether <br /> (ft)=Feet B=Benzene <br /> (ppb)=Parts per billion <br /> GW E=Groundwater Elevation T=Toluene -=Not Measured/Not Analyzed <br /> (ms])=Mean sea level E=Ethylbenzene QA=Quality Assurance/Trip Blank <br /> DTW—Depth to Water X=Xylenes <br /> Laboratory report indicates gasoline C6-C12+unidentified hydrocarbons C6-C12 <br /> Z MTBE by EPA Method 8260 <br /> 3 Laboratory report indicates gasoline C6-C12 <br /> 4 Laboratory report indicates gasoline <br /> 5 Laboratory report indicates unidentified hydrocarbons C6-C12 <br /> 6 BTEX and MTBE by EPA Method 8260 <br /> Data provided by Secor International,inc <br /> 9-9840 xls/#386846 5 As of 04/11/03 <br /> I <br />