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TA*6 i <br /> FLOW RATES AND ANALYTICAL RESULTS <br /> OF AIR SAMPLE ANALYSES-UNIT 1(SL NO 9321) <br /> ARCO Facility No 6100 <br /> 25775 South Patterson Pass Road <br /> Tracy,California <br /> Date Flowrate Influent Vacuums Sample Analyses m n <br /> scfrn 1 acfm Tem "WC ID GRO 7 Benzene Toluene Eth lbenzene Xylenes MTBE <br /> GRO=Gasoline Range Organics(C4 C12) <br /> TBE=Methyl tertiary butyl ether <br /> WC=inches of water column <br /> mg/ml=milligrams per cubic meter <br /> Temp =Temperature in degree Fahrcnheit <br /> Standard flow rate(scfm)measured using standard calibrated devices is converted to actual flow rate(acftn)using the following formulas QA/QC Review <br /> ressure corrected influent flow rate _ Total influent air flow rate scfm*{(406 B WC "WC)/406 8'WC] A=Data accepted without qualification <br /> Temperature Corrected influent flow rate = Pressure corrected flow rate *{(460 R+68deg F)1(deg F+460 R)) 7=Data accepted with qualification <br /> of Total=Total flow from field R=Data refected <br /> TO Cat=Total field flow+Dilution Air <br /> *=Average vacuum <br /> i Field data sheets record flow rate(inches of water column units)into the SVE system using a differential pressure guage and pitot tube <br /> These readings were converted to flowrate(actin,units)in 2 inch diameter pipe <br /> tlj Pnmary and confirmation results vaned by greater than 40%Relative Percent Difference(RPD) <br /> (2]Reporting limits were raised due to high level of analyte present in the sampt <br /> [3]Estimated value less than reporting limits but over the method detection lmuts <br /> [4]The reported results may be biased low since the analyses for these analytes were performed beyond the U S EPA recommended holding time <br /> ARCO 6100_O&M Page 2 of 2 STRATUS <br />