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T1 <br /> Groundwater Monitorin and Analytical Results i <br /> Tosco(Former BP)Service Station#111192 <br /> 1403 Country Club Boulevard <br /> Stockton,California <br /> EXPLANATIONS. <br /> Groundwater monitoring data and laboratory analytical results prior to November 11,2001,were complied by reports prepared by Blaine Tech Services,Inc <br /> TOC=Top of Casing B=Benzene -- Not Measured/Not Analyzed <br /> (ft)=Feet <br /> T=Toluene ND=Not detected <br /> DTW=Depth to Water <br /> E-$thylbenzene PP=Pre-purge sample <br /> GWE=Groundwater Elevation <br /> X=Xylenes D=Duplicate sample <br /> (msl)=Mean sea level MTBE=Methyl tertiary butyl ether QA=Quality AssurancelTnp Blank <br /> i <br /> TPH-G=Total Petroleum Hydrocarbons as Gasoline (ppb)=Parts per billion <br /> * TOC elevations were surveyed on September 20,2001,by Virgil Chavez Land Surveying The benchmark for the survey was a City of Stockton benchmark, <br /> being a disk in monument box,in the intersection of Country Club Boulevard and Pershing Avenue,(Benchmark Elevation=4 71 feet,NGVD 29) <br /> 1 MTBE by EPA Method 8260 <br /> 2 Laboratory report indicates gasoline C6-C12 <br /> I Original sample bottles broken, resampled <br /> TPH-G and BTEX by EPA Method 8260 <br /> S TPH-G,BTEX and MTBE by EPA Method 8260 <br /> 6 Additional analyses by EPA Method 8260 <br /> 7 Laboratory report indicates discrete peak @ MTBE <br /> 8 Laboratory report indicates hydrocarbon pattern is present in the requested fuel quantitation range but does not resemble the pattern of the requested fuel <br /> 9 Laboratory report indicates the concentration indicated for this analyte is an estimated value above the calibration range of the instrument <br /> 11192 xls1#180288 13 As of 11/15/02 <br />