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SE 7 <br /> FLOW RATES AND ANALYTICAL RESULTS <br /> OF AIR SAMPLE ANALYSES-UNIT 2(SL NO 9230) <br /> ARCO Facility No 6100 <br /> 25775 South Patterson Pass Road <br /> Tracy,California <br /> Date Flowrate Influent Sample Analyse (Mg/M' <br /> scfrn)t (acfm) Tem °F ID GRO Benzene Toluene Ethlbenzene Xylenes MTBE <br /> 10/06/04 11111 21443 120 610OTINF2 4,700 A 110 A 120 A 11 A 71 A <0 50 A <br /> 6100CINF2 1,600 A 41 A 39 A 36 A 21 A <0 50 A <br /> 6100EFF210604 57 A <0 50 A <0 50 A <0 50 A <0 50 A <0 50 A <br /> 10/14/04 28266 24669 145 6LOOINF2101404 2,000[2,5] A 44[2,5] A 48[2,5] A 5 8[2,5] A 30[2,5] A <2 5[2,5] A <br /> 6100EFF2101404 <50[4] A <0 50[4] A <0 50[4] A <0 50[4] A <1 0[4] A <0 50[4] A <br /> 11/04/04 217 15 20293 105 6100AINF-110404 3,200 A Ho A 94 A 63 A 34 A <0 50 A <br /> 6100ASYSINF-I 10404 1,000 A 34 A 30 A 23 A 12 A <0 50 A <br /> 6100AEFF-110404 160 A 43 A <0 50 A <012 A <012 A <014 A <br /> 11/11/04 12366 112 19 122 6100CINF2111104 2,200 A 38 A 33 A <5 0 A 9 5 A <5 0 A <br /> 6100EFF2111104 <50 A <0 50 A <0 50 A <0 50 A <0 50 A <0 50 A <br /> GRO=Gasoline Range Organics(C4 C 12) <br /> BE=Methyl tertiary butyl ether <br /> C=inches of water column <br /> g/m'=milligrams per cubic meter <br /> Temp =Temperature in degree Fahrenheit <br /> Standard flow rate(scfm)measured using standard calibrated devices is converted to actual flow rate(acfm)using the following formulas QA/QC Review <br /> Pressure corrected influent flow rate Total influent air flow rate scf n*{(406 8'WC "WCY406 8"WC) A—Data accepted without qualification <br /> Temperature Corrected influent flow rate Pressure corrected flow rate "((460 R+68deg F)I(deg F+460 R)] J—Data accepted with qualification <br /> •=Average vacuum R=Data rejected <br /> 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(acfm units)in 2-inch diameter pipe <br /> [1]Primary 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 sample <br /> [31 the reported result for GRO is due to chromatographic peaks present in the gasoline quantttation range however the peaks present do not resemble the pattern for gasoline <br /> [4I Extracted out of holding time <br /> [51 The elevated reporting limits were the result of dilutions performed by the laboratory in order to quantitate a target analyte <br /> ARCO 6100_0&M Page 2 of 2 S MA WS <br />