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COLUMBIA ANALYTICAL SERVICES,INC <br /> Analytical Report <br /> Client AR(-O Products Campanv Service Request S9701961 <br /> ProleLt 20805-114 008JTOl120791 00/2130 STOCKTON <br /> Date Collected 9/30/97 <br /> Sample Matrix Air Date Received 10/1/97 <br /> BTEX and Total Volatile Hydrocarbons <br /> Sdmple Name INFLUENT Units mg/m3 <br /> Lab Code S9701961-001 Basis NA <br /> Test Notes <br /> Prep Analysis Dilution Date Date Result <br /> AnalvteMethod Method MRL Factor Extracted Analyzed Result Notes <br /> Benzene 5030 8020 04 10 NA 10/1/97 ND <br /> Toluene 5010 8020 04 10 NA 10/1/97 180 <br /> Ethylhenzene 5030 8020 05 10 NA 10/l/97 65 <br /> Xylenes Total 5030 8020 09 10 NA 10/1/97 620 <br /> Total Volatile Hvdrowrbons <br /> Cl -05 5030 8015M 12 10 NA 10/1/97 <120 <br /> . C6-C12 5030 8015M 20 to NA 10/1/97 3200 <br /> TPH as Gasoline* 5030 8015M 20 10 NA 10/1/97 3200 <br /> * TPH as gasoline is defined as C6(benzene)through C 12(dodecane)and uses a <br /> mole,,ular weaeht of 100 to calculate the ppmv <br /> 1 <br /> 1522M20597p <br /> Page 3 <br />