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i <br /> QCOC Junuorl Msotl + [COC]L IGW VGW)—[COC JGW final VGW <br /> Yo Removed = 100 x Eqn 9 <br /> QCOC L-13011 Msoil +[COC]L GW VGW <br /> where <br /> [COC]unt soil= the compound of concern concentration (µg/kg) in untreated soil <br /> Mso,], =the mass of untreated soil (kg) <br /> [COC] unt GW =the compound of concern concentration (µg/L) in untreated <br /> groundwater <br /> VGW =the volume of untreated groundwater(L) <br /> [COC] GW,final =the compound of concern concentration (µg/L) in <br /> groundwater after treatment <br /> % Volatilized = 100 x QCOC]o_40rr„L VO-40rrun + [COC 140-soma V40-80 Run / Eqn 10 <br /> gCOC]Lntsotl Msorl +[COCILntGW VGW/ <br /> where <br /> [COC]„nt 5o,i=the COC concentration (µg/kg) in untreated soil <br /> Mso,,, =the mass of untreated soil (kg) <br /> [COC] unt GW =the COC concentration(µg/L) in untreated groundwater <br /> VGW =the volume of untreated groundwater(L) <br /> [COC]o-40n,,n =the COC concentration (µg/L) in off-gases collected from 0-40 <br /> min <br /> VO-40,n,n = the volume of off-gasses collected from 0-40 min <br /> [COC]44-$0,n,n =the COC concentration (µg/L) in off-gases collected from 40-80 <br /> min <br /> V40-80n„n =the volume of off-gasses collected from 40-80 mm <br /> Treating a mixture of site soil and water with mert nitrogen gas or the oxidants ozone or <br /> Peroxone significantly reduced the concentration of hydrocarbons in the aqueous phase <br /> Removal was greatest in the Peroxone test TPH-d, benzene, toluene, ethylbenzene, and <br /> o-xylene were not detected after Peroxone testing above their respective detection limits <br /> In contrast, all of the hydrocarbons present in untreated soil and groundwater (Table 4) <br /> were detected after Ozone testing and most were seen after nitrogen testing <br /> Removal of hydrocarbons from the Ozone and Peroxone test was primarily via <br /> destruction (oxidation), while removal from the Nitrogen test was via volatilization <br /> Evidence- for this is the formation of relatively high concentrations (990-1,100 µg/L) of <br /> acetone in the Ozone and Peroxone tests compared to the Nitrogen test, which had only <br /> • 37 µg/L of acetone (Acetone is a by-product of chemical oxidation) Furthermore, the <br /> percent of each hydrocarbon volatilized during the first 80 minutes of the test was <br /> generally much lower in the Ozone and Peroxone tests than in the Nitrogen test (Table 7) <br /> June I,2005 ETIC-Exxon#3942 <br />