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i ! i <br /> Table 6. Concentration of Hydrocarbons in A ueous Phase after Treatment. <br /> Analyte Concentration Percent Removed* <br /> Nitrogen zone Nitrogen Ozone <br /> Units Sparge Sparge Peroxone Sparge Sparge Peroxone <br /> TPH-d pg/L 600 100 <50 42 90 >95 <br /> TPH-g pg/L 680 790 89 9956 9949 9994 <br /> Acetone pg1L 37 1,100 990 -- — -- <br /> TBA pg/L < 10 22 < 10 -- — -- <br /> MTBE pg/L <05 <05 <05 -- -- -- <br /> Benzene ug1L <05 1 4 <06 >99 98 9994 >99 98 <br /> Toluene ug/L 4 0 17 <0 5 9998 9990 >99 99 <br /> Ethylbenzene gg/L 41 8 6 <0 5 9989 9977 >99 99 <br /> m,p-Xylenes µg/L 19 34 0 57 9986 99 75 99 996 <br /> o-Xylene 119 10 23 <0 5 9983 9962 >99 99 <br /> *Compared to mitial amount in soil and groundwater Assumes amount in soil is negligible after treatment <br /> Table 7. Concentration of Hydrocarbons in Off-Gases. <br /> Anal a Concentration Percent Volatilized in 1st 80 min* <br /> Units Nitrogen Sparge Ozone Sparge Ozone+ Peroxide Nitrogen Ozone Peroxone <br /> 0-40 min 40-80 min 0-40 min 41-81 min 0-00 min 41-81 min Sparge Sparge <br /> TPH-g pglL 6,7000 3300 3300 1300 850 17 57 26 5 <br /> Acetone µglL <200 < 100 < 100 <68 42 7 6 -- -- -- <br /> TBA pglL < 200 < 100 < 100 <68 <26 <2 -- -- -- <br /> MTBE gglL < 10 < 5 < 5 <34 < 13 <0 1 -- -- -- <br /> Benzene q& 140 44 210 100 74 28 67 124 31 <br /> Toluene gglL 840 300 640 280 170 2 8 61 54 10 <br /> Ethylbenzene ltglL 230 96 130 48 31 033 78 47 8 <br /> m,p-Xylenes µglL 670 300 98 27 18 <0 1 66 9 < 1 3 <br /> ,o-Xylene pg/L 1 270 140 59 19 13 <0 1 63 13 <2 2 <br /> *Based on initial amount in soil and groundwater <br /> PRIMA Environmental 13 Eval of Peroxone <br /> June 1,2005 ETIC-Exxon#3942 <br />