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• Table 2, Soil Vapor Extraction and Treatment System Effluent Data <br /> P y <br /> ARCO Facility 2133,Stockton,California <br /> TPH as Gasoline Benzene <br /> Effluent Emission Destruction Effluent Emission Destruction <br /> Pre-Catalyst Post-Catalyst Total System Flow Concentration Rate Efficiency Concentration Rate Efficiency <br /> Date Sampled Tem Tem Rate of>zi vbs/da tmy Obs/da t <br /> 1111195 748 780 100 11 042 98% 0 078 0 002 960/a <br /> 219/95 701 782 80 120 365 75% 027 0 006 95% <br /> 3/28195 753 771 80 071 002 99% <050 000002 100% <br /> 414/95 758 754 80 21 006 99% <050 000002 100% <br /> 5/3/95 653 726 100 56 2 13 88% 032 0 009 97% <br /> 5115/95 644 712 100 83 032 97% 0 051 0 002 99% <br /> 6112/95 745 775 100 14 005 99% <050 000003 100% <br /> 7/8/95 744 777 100 19 007 99% <050 000047 100% <br /> 8/22/95 740 943 100 17 065 98% 044 0 013 99% <br /> 9/19/95 752 838 100 57 022 99% <050 000047 100% <br /> 10/23/95 754 768 100 <50 005 100% <050 000047 100% <br /> 11/15/95 756 752 100 <50 005 100% <050 000047 100% <br /> 12/15/95 744 697 100 0 000 100% — -- <br /> 1/26196 745 728 100 96 036 92% -- -- <br /> 2/14/96 750 802 100 1 004 99% <br /> 3/27/96 758 651 100 59 022 4I% <br /> 1018196 742 643 100 06 002 98% <br /> TPH=Total Petroleum Hydrocarbons <br /> cfm=Cubic feet per minute <br /> ppmv=Parts per million by volumne <br /> "--"=Not available or not applicable <br /> Emission rates for values reported as ND are calculated using the detection limit <br /> Sample calculations <br /> Emission rats calculation <br /> lbs/day = ("x"ppm/1,000,000) *{"Q" ft'3/min)*("M W " lb/lb-mol)*(60 min/hr)*(24 hrlday)*(lb-mol/379 5 ft"3) <br /> where "x" is effluent concentration in ppmv <br /> "Q" is the system flow rate in ft"3/min <br /> "M W " is the molecular weight in Ib/lb-mol (100 2 for TPH-G,78 1 for benzene) <br /> Destruction efficiency calculation <br /> %= emoval rate,lb/da -Emission rate,1b/da /(Removal rate,lb/da *100 <br />