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TABLE 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 Analyses (mg/m') <br /> scfm 1 (acfm) Te eF ID GRO Benzene Toluene Eth lbenzene Xylenes MTBE <br /> 10/06/04 235.55 214.43 120 6100TINF2 4,700 A 110 A 120 A 11 A 71 A <0.50 A <br /> 6100CINF2 1,600 A 41 A 39 A 3.6 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 /> 10/14/04 282.66 246.69 145 6100INF2101404 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 /> 11/04/04 217.15 202.93 105 6100AINF-110404 3,200 110 94 6.3 34 <0.50 A <br /> 6100ASYSINF-110404 1,000 34 30 2.3 12 <0.50 <br /> 6100AEFF-110404 160 A 4.3 A <0.50 A <0.12 A <0.12 A <0.14 A <br /> 11/11/04 123.66 112.19 122 6100CINF2111104 2,200 38 33 <5.0 9.5 <5.0 <br /> 6100EFF2111104 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <br /> O=Gasoline Range Organics(C4-C12) <br /> H=Methyl tertiary butyl ether <br /> C=inches of water column. <br /> mg(no=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: QAIQC Review: <br /> essure corrected influent flow rate Total influent air flow rate scfm'((406.8"WC-"WC)1406.8"WC) A=Data accepted without qualification <br /> temperature Corrected influent flow rate Pressure corrected flow rate '((460 R+68deg F)/(deg F+460 R)) 7=Data accepted with qualification <br /> '-Average vacuum R=Data rejected <br /> 1 Field data sheets record flow rate(inches ofwater column,units)into the SVE system using a differential pressure guage and pilot tube <br /> These readings were converted to flowrate(actin,units)in 2-inch diameter pipe <br /> [1]Primary and confirmation results varied 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 /> [3]The reported result for GRO is due to chromatographic peaks present in the gasoline quantitation range,however,the peaks present do not resemble the pattern for gasoline. <br /> [4]Extracted out of holding time. <br /> [5]The elevated reporting limits were the result of dilutions performed by the laboratory in order to quantitate a target analyte. <br /> ARCO 6100 04M Page 2 of 2 STRATUS <br />