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Table 2. Soil Vapor • <br /> Extraction and Treatment System Effluent Data <br /> ARCO Station 2093,Tracy, CA <br /> I PH as asa in 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(°F) Rate(cfm) Flow Rate(cfm) (ppmv) (lbs/day) (percent) (ppmv) (lbs/day) (percent) <br /> 1/4/96 608 870 95 95 34 121 98% <br /> 1126/96 655 856 95 95 473 1 68 95% <br /> 2/26/96 590 904 45 75 25 070 96% <br /> 3/27/96 547 910 45 75 25 070 96% <br /> 4/15/96 671 895 47 74 37 0 10 99% _- <br /> 5/2/96 650 902 58 76 37 0 11 99% <br /> 5/15196 648 905 43 60 132 030 98% <br /> 6/3/96 650 902 36 63 12 003 100% <br /> 6/21/96 609 850 45 70 78 020 99% <br /> 7/10/96 627 901 47 65 1 I 4 028 98% <br /> 8/12/96 650 878 62 68 81 206 92% <br /> 9/16/96 696 832 72 80 145 043 98% <br /> 10/8/96 659 832 36 60 4 009 99% <br /> 11/5196 791 852 46 60 0 000 100% <br /> 12/20/96 732 778 49 63 18 004 97% .. ._ <br /> 1/13/97 787 798 49 60 0 000 100% <br /> 6/18/97 711 843 23 45 12 002 100% <br /> TPH—Total Petroleum Hydrocarbons <br /> cfm—Cubic Feet per minute <br /> ppmv—Parts per mttlion by volume <br /> -`-Not available or not analyzed <br /> Sample Calculations <br /> 4 Mass emission rate calculation <br /> lbs/day=("x"ppm)*(IE-6)•(molecular weight lb/lb-mol)*("y"cubic feet/min)* (24 hr/day)*(60 min/hr)*(Ib-mol/380 cubic feet) <br /> where"x"as effluent concentration in ppm and"y"is the flow rate,cfm <br /> Destruction efficiency calculation <br /> %=((Mass extraction rate lb/day-Mass emission rate lb/day)/(Mass extraction rate lb/day))*100 <br /> (EW tC05M5worke0pg5ttI SM032093 Aw) <br />