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+l <br /> COLUMBIA ANALYTICAL SERVICES,INC. <br /> Analytical Report <br /> Client: ARCO Products Company Service Request: 59702474 <br /> Project: 20805-114 009(r #20791 00/2130 STOCKTON Date Collected: 11/24197 <br /> Sample Matrix: Air Date Received: 1126197 <br /> BTEX and Total Volatile Hydrocarbons <br /> Sample Name INFWENT Units ppmV <br /> Lab Code S9702474-001 Bass. NA <br /> Test Notes <br /> Prep Analysis Dilution Date Data Result <br /> Analyte Method Method MRL Factor Extracted Analyzed Result Notes <br /> Benzene 5030 8020 0 l 2 NA 1126/97 <0 2 C1 <br /> Toluene 5030 8020 01 2 NA I V26/97 37 <br /> £thylbe=cna $030 8020 01 2 NA 11/26/97 12 <br /> Xylenes,Total 5030 8020 02 2 11/26/97 74 <br /> Total Volatile Hydrocarbons. <br /> Cl-05 5030 8015M 5 2 NA 1126/997 6 <br /> C6-C12 5030 8015M 5 2 NA 1126/97 390 <br /> TPH as Gasoline' 5030 8015M 5 2 NA 1126197 390 <br /> ' TPH as gasoline is defined as C6(benzene)through C 12(dodecane)and uses a <br /> malecailar weight of 100 to calculate the ppmv <br /> CL The MRI.was raised due to high analyte c ncentration regiururg sample dduttoL <br /> I <br /> I <br /> r� 1g:yp20097p <br /> 4 <br /> I <br /> II <br /> Page 4 <br />