Laserfiche WebLink
3.0 RESULTS AND DISCUSSION <br /> The results of the bench testing are discussed Hydrocarbons were removed by all <br /> treatments, but removal by Ozone and Peroxone was due primarily to destruction, while <br /> removal by Nitrogen (an inert gas) was due to volatilization Peroxone volatilized a <br /> smaller amount of hydrocarbons than did Ozone Cr(VI) was formed by treatment with <br /> Ozone and Peroxone (but not Nitrogen), but the amount vaned greatly when tests were <br /> repeated However, other tests indicate that untreated site soil can reduce Cr(VI), <br /> suggesting that natural attenuation of Cr(VI) is possible <br /> 3.1 Characterization of Soil and Groundwater <br /> The concentrations of hydrocarbons in untreated COMP7 soil and in untreated IP <br /> groundwater are shown in Table 4 The concentrations of metals and other parameters <br /> are given in Table 5 <br /> Table 4. Concentrations of Hydrocarbons in <br /> Untreated COMP? Soil and 11011 Groundwater <br /> Analyte Units Sam le <br /> __U_nfr_e_aTe__d Untreatec <br /> GW Soil <br /> TPH-d ppb 390 6300 <br /> TPH-g ppb 84000 700,000 <br /> Acetone ppb < 2,000 < 10,000 <br /> TBA ppb < 1,000 <25,000 <br /> MTBE ppb < 50 <250 <br /> Benzene ppb 2,500 <250 <br /> Toluene ppb 16,000 11,000 <br /> Ethylbenzene ppb 2,600 12,000 <br /> m,p-Xylenes ppb 9,000 45,000 <br /> o-Xylene ppb 4,100 19,000 <br /> NOTE ppb=pg/L for aqueous concentrations andµglkg for soil <br /> concentrations <br /> 3.2 Hydrocarbon Removal by Ozone and Peroxone <br /> The concentrations of hydrocarbons in the aqueous phase and off-gases collected over the <br /> first 80 minutes are given In Tables 6 and 7, respectively The Percent Removed is also <br /> given The percent removed from the aqueous phase for each hydrocarbon was <br /> calculated according to Eqn 9 and assumes that the amount of each hydrocarbon in the <br /> soil after treatment is negligible The Percent Volatilized during the first 80 minutes was <br /> calculated according to Eqn 10 Note that the concentration of hydrocarbons post- <br /> treatment was not measured in the soil phases because of difficulty of obtaining a post- <br /> treatment soil sample without significant loss of hydrocarbons due to volatilization <br /> PRIMA Environmental I 1 Eva] of Peroxone <br /> June 1,2005 ETIC-Exxon##3942 <br />