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COLUMBIA ANALYTICAL SERVICES,INC. <br />' Analytical Report <br /> Client: ARCO Products Company Service Request: 39701747 <br /> Project. 20805-146 010/TO#20682 0012168 STOCKTON Date Collected: NA <br /> Sample Matrix Aw Date Received: NA <br /> BTEX and Total Volatile Hydrocarbons <br /> Sample Name Method Blank Units ppmV <br /> Lab Code 5970912-VB 1 Basts NA , <br /> Test Notes <br /> Prep Analysts Dilution Date Date Result <br /> Analyte Method Method MRL Factor Extracted Analyzed Result Notes <br /> Benzene 5030 8020 01 1 NA 9/12197 <16 <br /> Toluene 5030 8020 01 1 NA 9/12/97 <16 <br /> Ethylbenzene 5030 8020 01 1 NA 9112197 <16 <br /> Xylenes,Total 5030 8020 02 1 NA 9/12/97 <33 <br /> • <br /> TPH as Gasoline' 5030 8015M 5 1 NA 9/12/97 <61 <br /> • TPH as gasoline is defined as C6(benzene)through C 12(dodecane)and uses a <br /> molecular weight of 100 to calculate the ppmv <br /> 1527/=97p <br /> Page 8 <br />