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i COLUMBIA ANALYTICAL SERVICES,INC <br /> Analytical Report <br /> • Client ARCO Products(,ompdnv Service Request: 59701961 <br /> Prolei,t 20805-114 OOg/ro920791 00/2130 STOCKTON Date Collected: 9/30197 <br /> SarnplL Matrix Air Date Received: 1011/97 <br /> BTEX and Total Volatile HY droedrbons <br /> Sample Mime INFLUENT Units PpmV <br /> Lab Code 59701961-001 Basis Nps <br /> Test Notes <br /> Prep Analysis Dilution Date Date Result <br /> Analyte Method Method MRL Factor Extracted Analyzed Result Notes <br /> Benzene 5030 8020 01 10 NA 10/1/97 ND <br /> Toluene 5030 8020 01 10 NA 10/1/97 48 <br /> Ethylbenzene 5030 8020 01 10 NA 10/1/97 15 <br /> Xylenes,Total 5030 8020 02 10 NA 1011/97 140 <br /> Total Volatile Hvdroc.arbons <br /> C'-C' <br /> 1-CS 5030 8015M 5 10 NA 10/1/97 <50 <br /> C6-C12 5030 9015M 5 10 NA 1011/97 780 <br /> TPH as Gasoline* X030 8015M 5 10 NA 10/1/97 780 <br /> i <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 /> I <br /> I <br /> . 1522/020597p <br /> Page 4 <br />