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Table A-2 Soil Vapor Extraction System Emission Data ARCO Service Station No.548 1612 Hammer Lane,Stockton,California System Data TPH as Gasoline Benzene Effluent Effluent Hour Meter Influent ThermOx Extraction Concen- Emission Destruction Concen- Emission Destruction Is System Sample Date Reading Pressure op.Temp Flow Rate tration Rate Efficiency tration Rate Efficiency In Compliance 10 Sampled (hours) (in H2O) (°F) scim (p mv) lbs/da ) (percent) mv) (lbslda ) percent with SJVUAPCD EFFL 10/20/2003 23482.4 10.5 137 54.0 <2.8 0.05 99% <0.03 0.00 80% Yes EFFL 11/18/2003 24034.5 8.0 133 42.3 <2,8 0.04 99% <0.03 0.00 60% Yes EFFL 12/22/2003 24584.5 7.2 120 42.3 <2.8 0.04 99% <0.03 0.00 80% Yes EFFL 1/13/2004 25113.5 6.9 128 44.0 <2.8 0.04 78% <0.03 0.00 0% Yes EFFL 2/10/2004 25786 8.0 128 45.7 <2.8 0.04 7% <0.03 0.00 0% Yes EFFL 3/11/2004 26507 7.6 137 70.0 <14.0 0.31 NC <0.02 0.00 NC Yes EFFL 418!2004 27178.5 4.0 144 87.3 <14.0 0.39 NC <0.02 0.00 NC Yes EFFL 5/18/2004 28045.8 6.4 136 44.3 <14.0 0.20 NC <0.02 0.00 NC Yes EFFL 6/9/2004 28577.5 --- --- --- --- --- -•- Shut Down San Joaquin Valley unified Air Pollution Control District Permit#N-4124-1-0 Conditions are as follows: Either the VOC control efficiency shall not be less than 95%,or the total VOC emissions rate shall not exceed 2 pounds in any one day. The minimum operating temperature for the combustion chamber of the catalytic oxidizer shall be maintained at or above 600 degrees F. The total VOC emission rate from the soil remediation system served by the catalytic oxidizer shall not exceed 6.6 pounds in any one day, NC=cannot be calculated because influent concentration is less than,or equal to,the effluent concentration TPH =Total petroleum hydrocarbons ---=Not measured or analyzed scim =Standard cubic feet per minute in H2O =Inches water column ppmv =Parts per million by volume < =Below detection limit lbs =Pounds Table A-2 O&M-0548-20mr04 1 of 1