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a *E6 . FLOW RATES AND ANALYTICAL RESULTS OF AIR SAMPLE ANALYSES Former ARCO Station No 6100 25775 South Patterson Pass Tracy,California System Influent System Date Flowrate Influent Vacuum Sample ID Anal ses (mg/m3 acfin t (scfm) Tem °F "WC GRO Benzene Toluene Eth lbenzene Xylenes. MTBE 05/16/05 19189 17932 10500 19040 6100 AINF 29,000 A 160 A 140 A <100 A 130 A <100 A 6100 A SYS INF 22,000 A 120 A 120 A <100 A 110 A <100 A 6100 A SYS EFF <50 A <0 50 A <0 50 A <0 50 A <0 50 A <0 50 A 06/14/05 27720 25019 12500 24470 6100 A Inf 29,000 A 720 A 970 A 94 A 620 A 12 A 6100 A Sys Inf 3,100 A 62 A 88 A 96 A 57 A <5 0 A 6100 A Eff <50 A <0 50 A <0 50 A <0 50 A <0 50 A <0 50 A 07/06/05 33800 29256 15000 6800 016100AINF 35,000 A 610 A <25 A 170 A 910 A <25 A 06100ASYSINF 9,600 A 160 A 290 A 45 A 250 A <10 A 06100AEFF <50 A <0 50 A <0 50 A <0 50 A 064 A <0 50 A 08/02/05 23925 20051 17000 8160 6100AINF 47,000 A 550 A 750 A 150 A 980 A <25 A 6100ASYSINF 15,000 A 130 A 430 A 66 A 450 A <10 A 6100AEFF <50 A <0 50 A <0 50 A <0 50 A <0 50 A <0 50 A 09/06/05 11900 11679 7800 12240 6100AINF 10,000[1] A 160[1] A 350[1] A 59[1] A 370[1] A <5 0[L] A 6100ASYSINF 24,000[1] A 440[1] A 880[1] A 140[1] A 890[1] A <I0[1] A 6100AEFF <50 A <0 50 A <0 50 A <0 50 A <1 0 A <0 50 A The SVE system was non-operational between 9119105 and 1217105 due to blower malfunction 12/07/05 2871 24851 15000 748 6100 A INF 9,100[l] A 77[1] A 150[1] A 19[1] A 180[1] A <5 0[l] A 6100ASYSINF 31,000[1] A 200[1] A 430[1] A 64[1] A 690[1] A <10[l] A 6100 A EFF <50 A <0 50 A <0 50 A <0 50 A <1 0 A <0 50 A C=inches of water column Temp =Temperature in degree Fahrenheit QA/QC Review mg/m3=milligrams per cubic meter A=Data accepted without qualification Flow rate(acfm)measured using standard calibrated devices is converted to standard flow rate(scfm)using the following formula 3=Data accepted with qualification empemture Corrected influent flaw rate = Measured flow rate •{(460 R*66deg F)/(deg F{460 R)} R=Data refected Since flow rate is measured on the positive side of the liquid ring blower package,vacuum correction is not applied [II Reporting limits were raised due to high level of analyte present to the sample i Field data sheets record flow rate in feet per minute measured using an anemometer These readings were converted to flowrate(acfm units)in 4-inch diameter pipe Arco-6 l00_Quarterly_0&M50{)cfm Page 1 of 1 57'R/1TU5 I