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1 v <br /> 1 <br /> A S S 0 C I A T E S I N C <br /> achieved by the thermal oxidizer was 9 2 inches of mercury, based on the information contained on <br /> the field monitoring data sheets contained in Attachment 3 <br /> Based on influent flowrate of 100 cfm, average influent concentration of TPHg of 430 ppmv, and <br /> using the values supplied by SunStar Labs of 24 5 liters of vapor per mole of TPHg and a <br /> molecular weight of 86 27 grams per mole of TPHg yields <br /> = 430 1 TPHq x 100 ft3 x 60 min x 28 32 1 air x 1 mole TPHg x 86 27g x 1 Ib <br /> 1,000,000 1 air min 1 hour 1 ft 24 5 1 vapor mole TPHg 454 g <br />' = 0 57 Ib TPHg x 2,030 hours = 1,157 lbs of TPHg during third quarter 2003 <br /> hour <br /> 1 Total TPHg removed via vapor extraction since system startup on December 19, 2002 <br />' = 400 Ib TPHg fourth quarter 2002 + 3,558 lbs of TPHg first quarter 2003 + 1,270 Ibs second quarter 2003+ <br /> 1,157 lbs of THg third quarter 2003 = 6,385 pounds of TPHg removed since the startup of the system <br />' The same calculation for benzene with 24 5 liters of vapor per mole and a molecular weight of 78 <br /> grams per mole is shown below <br /> = 0 651 benzene x 100ft3 x 60 rain x 28 32 1 air x 1 mole benzene x7. -8g- x 1 Ib <br /> 1,000,000 1 air min 1 hour 1 ft3 24 5 1 vapor mole benzene 454 g <br /> = 0 0007 Ib benzene x 2,030 hours = 1 5 Ib of benzene during third quarter 2003 <br /> I hour <br /> Total benzene removed via vapor extraction since system startup on December 19, 2002 <br />' = 3 8 Ib benzene fourth quarter 2002+ 10 lbs of benzene first quarter 2003+3 2 Ib benzene second quarter 2003 <br />' + 1 5 lbs benzene third quarter 2003 = 18 5 pounds of benzene removed since the startup of the system <br /> Water Treatment System <br />' From June 25 to September 30, 2003, the average groundwater extraction rate from the vapor <br /> extraction system knockout drum was approximately 24 gallons per hour and the total groundwater <br /> 1 discharged to the City of Stockton sewer system was approximately 48,941 gallons <br /> Assuming 48,941 gallons of groundwater were extracted from vapor wells VW1 through VW4 <br /> and the average influent concentrations of TPHg and total BTEX between June 25 and <br /> September 30 were approximately 2,036 ppb and 78 5 ppb, respectively, the following <br /> calculation can be used to approximate the amount of TPHg and BTEX removed from the <br /> 1 groundwater at the site between June 25 and September 30, 2003 <br /> w lwordpro1625961quanlyl3gr-2003 doc 6 <br />