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Table 2 Soil Vapor p Extraction and Treatment System Effluent Data ARCO Facility 21133, Stockton, California TPH as Gasoline Benzene Effluent Emission Destruction Effluent Emission Destruction Pre-Catalyst Post-Catalyst Total System Concentration Rate Efficiency Concentration Rate Efficiency Date Sampled Temp(°F) Temp(°1) Flow Rate(cfm) (ppmv) (lbs/day) (percent) (ppmv) (lbs/day) (percent) 1/11/95 748 780 100 11 042 98% 0 078 0 002 96% 2/9195 701 782 80 120 365 75% 027 0 006 95% 3/28/95 753 771 80 071 002 99% <050 000002 100% 414/95 758 754 80 2 1 006 99% <050 000002 100% 5/3/95 653 726 100 56 2 13 88% 032 0 009 97% 5115/95 644 712 100 83 032 97% 0051 0 002 99% 6112/95 745 775 100 14 005 99% <050 000003 100% 7/8/95 744 777 100 19 007 99% <050 000047 100% 8122/95 740 943 100 17 065 98% 044 0 013 99% 9/19/95 752 838 100 57 022 99% <050 000047 100% 10/23/95 754 768 100 <50 005 100% <050 000047 100% 11/15/95 756 752 100 <50 005 100% <050 000047 100% 12/15/95 744 697 100 0 000 100% -- 1/26/96 -1/26/96 745 728 l00 96 036 92% -- -- -- 2/14/96 750 802 100 1 004 99% -- -- -- 3/27/96 758 651 100 5 9 022 41% -- -- -- 10/8/96 742 643 100 06 002 98% -- -- TPH =Total Petroleum Hydrocarbons cfm=Cubic feet per minute ppmv=Parts per million by volumne "--"=Not available or not applicable Emission rates for values reported as ND are calculated using the detection limit Sample calculations- Emission rate calculation lbs/day=("x"ppm/1,000,000)*("Q" ft^31mm)*("M W"Ib/lb-mol)*(60 mut/hr)*(24 hr/day)*(Ib-mol/379 5 ft^3) where "x"is effluent concentration in ppmv "Q" is the system flow rate in f1^3/min "M W" is the molecular weight in lb/1b-mol (100 2 for TPH-G,78 1 for benzene) Destruction efficiency calculation %=((Removal rate, lb/day-Emission rate, Ib/day)/(Removal rate,Ib/day))*100