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COLUMBIA ANALYTICAL SERVICES,INC <br /> Analytical Report <br /> Client ARCO Products Company P Y Service Request 59701961 <br /> Prolel-t 20805-114 008lTO920791 0012130 STOCKTON Date Collected 9/30/97 <br /> Sample Matrix Air Date Received 10/1/97 <br /> BTEX and Total Volatile Hydrocarbons <br /> Sample Name EFFLULNT Units mghO <br /> Lab Code S9701961-002 Basis NA <br /> Test Notes <br /> Prep Analvsis Dilution Date Date Result <br /> Analyte Method Method MRL Factor Extracted Analyzed Result Notes <br /> Benzene 5030 8020 0 4 1 NA 1011197 ND <br /> Toluene 3030 8020 0 4 1 NA 10/1/97 21 <br /> Ethylbenzene 5030 8020 05 1 NA 10/1/97 16 <br /> Xylenes Total 5030 8020 09 1 NA 10/1/97 6 3 <br /> Total Volatile HvdroLarbons <br /> C1-CS 5030 8015M 12 1 NA 10/1/97 18 <br /> C6-C12 5030 8015M 20 1 NA 10/1/97 340 <br /> TPH as Gasoline" 5030 8015M 20 1 NA 10/1/97 340 <br /> I <br /> r 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 /> IS22/020597P <br /> Page 5 <br />