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MAR-30-2000 16 37 CAMBRIA 510 420 9170 P 06/10 <br /> • Nevada Slte Results <br /> MTBE destruction results from the HI POx Pilot System are shown in Figure 2 as a function of <br /> applied ozone. <br /> 4500- <br /> 400, <br /> 3600 <br /> 3000 --4 WBE —=-79A —t,-TSF---a—Ac46gnP <br /> m 2500 <br /> q. <br /> 2000 <br /> 1000-- <br /> 0 <br /> 000 0 <br /> 0 20 40 60 80 100 120 <br /> Applied ozone(ppm) <br /> • Figure 2 Contaminate profile at Nevada from HiPOx Plot System <br /> The objective at the Nevada site was to reduce the MTBE concentration range from 40 to 200 <br /> ppb The range of desired discharge levels is consistent with the influent capacity for MTBE <br /> at the secondary treatment system. The effluent from the HiPOx system will be forwarded to <br /> the existing bioreactor system. The oxidation by-products t butyl alcohol (TBA), t-butyl <br /> formate (TBF) and acetone can be easily treated by the existing bioreactor system, therefore <br /> making it unnecessary to continue the oxidation process further to complete destruction <br /> Based on these test results, a 30 GPM HIPOx system was installed at the Nevada site for the <br /> wells with the higher MTBE concentration as a pretreatment to the existing bioreactor system <br /> The installed HiPOx system is fully automated with all process variables monitored and <br /> controlled by a single PLC. The system is equipped with a remote paging system notifying <br /> the operator of any system fault or out of limit condition The system was successfully <br /> installed and became fully operational on November 9, 1999 The system has been operating <br /> 24 hours a day, seven days a week with an overall reliability performance factor in excess of <br /> 95% The results are shown in Figure 3. <br /> Page 5 <br />