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• i • <br /> Table 2. Soil Vapor Extraction and Treatment System Effluent Data <br /> ARCO Station 2093,Tracy, CA <br /> I PH as aso ine Benzene <br /> Effluent Destruction Effluent Emission Destruction <br /> Prc-Catalyst Post-Catalyst Manifold I lots Iotal System Concentration Emission Rdtc Efficic.nc.y Concentration Rale EffretcnLy <br /> Date Temp(°F) Temp(°F) Rate(cfm) Flow Rate(rfm) (ppmv) (lbs/day) (percent) (ppmv) (lbs/day) (percent) <br /> 1/4/96 608 870 95 95 34 1 21 98% -- -- _. <br /> 1126196 655 856 95 95 473 1 68 95% <br /> 2126196 590 904 45 75 25 070 96% <br /> 3127/96 547 910 45 75 25 070 96% <br /> 4/15196 671 895 47 74 3 7 0 10 99% <br /> 512196 650 902 58 76 3 7 0 11 99% <br /> 5115/96 648 905 43 60 13 2 030 98% <br /> 6/3196 650 902 36 63 1 2 003 100% -- _ <br /> 6/21196 609 850 45 70 7 8 020 99% <br /> 7/10196 627 901 47 65 1 1 4 028 98% <br /> 8/12196 650 878 62 68 91 206 92% <br /> 9116196 696 832 72 80 145 043 98% - - - <br /> 1018196 659 832 36 60 4 009 99% <br /> 11/5/96 791 852 46 60 0 000 100% -- - <br /> 12/20/96 732 778 49 63 1 8 004 97% -- -- _ <br /> 1113/97 787 798 49 60 0 000 100% <br /> 6118/97 787 798 23 45 12 002 100% <br /> j 7/24/97 604 677 43 60 0 1 000 100% -- -- <br /> 8128/97 726 856 60 60 8 5 0 19 96% <br /> 9/10197 785 845 60 60 7 016 96% <br /> 10/15/97 608 670 65 65 95 023 95% <br /> 11/17/97 618 665 1 60 1 60 1 3 1 007 97% 1 -- __ <br /> TPH=Total Petroleum Hydrocarbons <br /> cfm=cubic feet per minute <br /> ppmv=parts per million by volume <br /> =Not available or not applicably <br /> Sample Calculations <br /> Mass emission raie calculation <br /> lbs/day=("x"ppm)*(l E-6)*(molecular weight IbIlb-mol)*("y"cubic feet/mm)* (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 lb/day-Mass emission rate Ib/day)/(Mass extraction rate Ib/day)}*100 <br /> (E U4RC0EM\YVontcopy161961Ves2043 xiw) <br />