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Table 2. Soil Vapor Extraction and Treatment System Effluent Data <br /> ARCO Station 2093,Tracy, CA <br /> 1 11-1 as Gasoline Benzene <br /> Effluent Destruction Effluent Emission Destruction <br /> Pre-Catalyst Post-Catalyst .Manifold Flow Total System Concentration Emission Rate Efficiency Concentration Rate Efficiency <br /> Date Temp(°F) Temp(OF) Rate(cfm) Flow Rate(cfm) (ppmv) (lbs/day) (percent) (ppmv) (lbs/day) (percent) <br /> 1/4/96 608 870 95 95 34 1.21 98% -- -- __ <br /> 1/26/96 655 856 95 95 47.3 1.68 95% <br /> 2/26/96 590 904 45 75 25 0.70 96% <br /> 3/27196 547 910 45 75 25 0.70 96% -- -- __ <br /> 4/15/96 671 895 47 74 3.7 0.10 99% -- -- __ <br /> 5/2/96 650 902 58 76 3.7 0.11 99% -- -- __ <br /> 5/15/96 648 905 43 60 13.2 0.30 98% <br /> 6/3/96 650 902 36 63 1.2 0.03 100% <br /> 6/21/96 609 850 45 70 7.8 0.20 99% -- -- .. <br /> 7/10/96 627 901 47 65 11.4 0.28 98% <br /> 8/12196 650 878 62 68 81 2.06 92% <br /> 9/16/96 696 832 72 80 14.5 0.43 98% <br /> 10/8/96 659 832 36 60 4 0.09 99% <br /> 1.115196 791 852 46 60 0 0.00 100% <br /> 12/20/96 732 778 49 63 1.8 0.04 97% -- - -_ <br /> 1/13/97 787 798 49 60 0 0.00 100% <br /> TPI I=Total Petroleum Hydrocarbons <br /> cfm=Cubic feet per minule <br /> ppmv=Pans per million by volumne <br /> =Not measured <br /> Sample Calculations: <br /> Mass emission rate calculation: <br /> lbs/day=("x"ppm)*(I E-6)*(molecular weight lb/lb-mol) ("y"cubic feet/min)* (24 hr/day)*(60 min/hr)*(Ib-mol/380 cubic feet) <br /> where"x"is effluent concentration in ppm and"y"is the flow rate,cfm <br /> Destruction efficiency calculation: <br /> %_((Mass extraction rate ib/day-Mass emission rate lb/day)/(Mass extraction rate Ib/day))*100 <br /> tE:V4RCO$MSworkcopy1Gl9BkVes2t193.xhw) <br />