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Table 19 <br /> Apartment Soil Vapor Extraction System-Soil Vapor Influent Analytical Data and Mass Recovery <br /> Parcel 2A-L&M OU <br /> 666 West Weber Avenue,Stockton,CA <br /> (In order to show best estimate,recovery calculations assume one-half of the detection limit when the compound is reported as less than the detection limit.) <br /> Definitions: <br /> <=Value is less than laboratory reporting limit <br /> --=Data not available <br /> lbs=Pounds <br /> MtBE=Methyl tert-butyl ether <br /> ppmv=Parts per million by volume <br /> scfm=Standard cubic feet per minute <br /> TPHg=Total petroleum hydrocarbons as gasoline <br /> TPHd=Total petroleum hydrocarbons as diesel <br /> Notes: <br /> a=System permitted under ATC number N-4878-2-0. Source test for air board. <br /> b=Diesel analyzed by Air Toxics LTD via EPA Method TO-17. <br /> c=Diesel sample collected on 9/22/11 <br /> Kiff Analytical Molecular Weights: Air Toxics Molecular Weights: <br /> TPHg=95 g/mol TPHd= 233 g/mol <br /> Benzene=78.1 g/mol <br /> MtBE=88.2 g/mol <br /> Specific Weight: <br /> Specific Weight of TPHg=6.1 pounds per gallon <br /> Specific Weight of benzene=7.4 pounds per gallon <br /> Specific Weight of MtBE=6.18 pounds per gallon <br /> Specific Weight of Diesel=7.18 pounds per gallon <br /> Equations: <br /> [Average of consecutive concentrations(ppmv)] <br /> Recovery Calculations- -------------------- -------------------- -------------------- X[Molecular Weight(g/mole)]X[1 lbs/453.59 g]X[1.2641 moles/1 cf]X[Average of consecutive Flow Rates(scfm)]X[60 min/hr]X[24 hr/day]=XX.XXX lbs/day <br /> [1,000,000 parts] <br /> I:\Tidewater\TW Stockton(P2A)\Engineering\ORM\Tables\O&M Tables 2011\3Q11\Parcel 2A OM Tables 3Q11.xlsx Page 2 of 2 <br />