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C <br /> AMARIA <br /> Table 2. Vapor Extraction-Mass Removal Data- Shell-branded(Independent) Service Station,420 West Kettleman Lane, Lodi, California <br /> TPHe Benzene MTBE <br /> System TPHg Cumulative Benzene Cumulative MTBE Cumulative <br /> Operational Flow Hydrocarbon Concentrations Removal TPHg Removal Benzene Removal MTBE <br /> Date Time Rate TPHg Benzene MTBE Rate Removed Rate Removed Rate Removed <br /> (hours) (cfm) (Concentrations in ppmv) (lb/hour) (lb) (lb/hour) (lb) (lb/hour) (lb) <br /> 26-Nov-01 121 462 520 <1 0 280 0 321 3 88 0 000 0 003 0177 2 14 <br /> 27-Nov-01 240 457 250 <0 40 120 0 153 754 0 000 0 006 0 075 394 <br /> 28-Nov-01 240 449 200 <0 10 42 0 120 1042 0 000 0 007 0 026 4 55 <br /> 29-Nov-01 240 493 100 <0 10 20 0 066 1200 0 000 0 007 0 013 4 88 <br /> 30-Nov-01 12 5 446 210 0 057 20 0125 1357 0 000 0 008 0 012 503 <br /> (Total Pounds Removed; TPH = 1357 Benzene= 0.008 MTBE= 5.03 <br /> Abbreviations and Notes <br /> cfm=Cubic feet per minute <br /> TPHg=Total petroleum hydrocarbons as gasoline <br /> MTBE=Methyl tertiary butyl ether <br /> ppmv = Parts per mullion by volume <br /> lb = Pounds <br /> TPHg,Benzene,and MTBE analyzed by EPA Method 8260B from 1-liter tedlar bag samples <br /> TPHg I Benzene 1 MTBE removal rate=Rate based on Bay Area Air Quality Management District's Manual of Procedures for Soil Vapor Extraction dated July 17,199t <br /> Removal Rate=C(ppmv)x Q(cfm)x(Ilb-mole/386fe)x MW(lb/lb mole)x 60 mini ttr x 10 6 <br /> where C=concentration,Q=flow,MW=molecular weight(86 lb/lb-mole for TPHg 78 lb/lb-mole for benzene,88 Ib/lb-mole for MTBE) <br /> If a constituent was not detected,half of the detection limo was used as the concentration <br /> Cumulative TPHg/Benzene/MTBE removal=Removal rate multiplied by the hours of operation plus the previous total <br /> 1346 Page 1 of 1 <br />