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-� .,� _ .�. w. � �■ err ■■� 1� � � � � � � � <br /> Table 3. COC Removal. Aqueous Results. <br /> Anal a Concentration, 1L <br /> y enze m,p- <br /> TPH-g Benzene Toluene ne Xylenes o-Xylene Acetone TBA MTBE <br /> LUntreated Site Materials <br /> Sad < 1,000 <5 <5 <5 <5 <5 <200 <500 <5 <br /> Groundwater 23,000 2300 1300 460 2200 560 <,600 <300 < 15 <br /> Control <br /> 0 hr 21000 2200 1200 360 2000 510 <600 <300 < 15 <br /> 225hrs nm nm nm nm nm nm <200 nm nm <br /> 425 hrs nm nm nm nm nm nrn <200 nm nm <br /> 6 25 hrs 15000 2000 1100 280 1800 470 <600 <300 < 15 <br /> Nitrogen Sparge <br /> 0 hr 22000 2200 1300 560 1 2100 510 <600 <300 <15 <br /> 225hrs nm nm nm nm nm nm 34 nm nm <br /> 425hrs nm nm nm nm nm nm 19 nm nm <br /> 625 hrs <50 <05 <05 <05 <05 <05 < 10 < 10 <05 <br /> Ozone Sparge <br /> 0 hr 22000 2200 1300 370 2100 530 <600 <300 < 15 <br /> 225hrs nm nm nm nm nm nm 450 nm nm <br /> 425hrs nm nm nm nm nm nm 440 nm nm <br /> 625 hrs <50 <05 <05 <05 <05 <05 1 390 < 10 <05 <br /> Table 4 COC Removal Off-Gas Results <br /> Analyte Concentration, IL %Volatilized in First hour <br /> Nitrogen Sparge Ozone Sparge Nitrogen Ozone <br /> 0-30 min 30-60 shin 0-30 min 30-60 min Sparge Sparge <br /> TPH-g 1,6000 470 16 < 10 71 05 <br /> Benzene 1600 79 8 8 <0 1 81 3 <br /> Toluene 790 41 <0 1 <0 1 69 <0 2 <br /> Eth (benzene 310 15 <0 1 <0 1 59 <0 4 <br /> m, -X lens 990 55 <0 1 <0 1 55 <0 1 <br /> o-X lene 180 12 <01 <61 44 <03 <br /> Acetone <40 <40 76 <2 -- — <br /> TBA < 100 < 100 <5 <5 — <br /> MTBE <2 <2 <0 1 <0 1 -- -- <br /> • Percent volatilized =100*(mass volatilized in 60 mm)/mass at Time 0) <br /> PRIMA Environmental 8 Eva]of Ozone <br /> January 27,2005 ENSR-Unocal 5099 <br />