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Show EPA Region rv corxiucted a PCB cleanup at a Superfund site in Savanna.h. Georgia. The results of this cleanup are currently being evaluated by EPA. A SITE daronstration location will be selected after the evaluation of this data. EPA Developed Technologies In addition to the SITE dem::m.stration projects, there are several EPA developed technologies that sbJuld provide inno.rative and effective solutions to the cl~ of Superfund sites. 'l\«) of these will be discussed here: the IId:>ile i..rx:inerator and chanical detoxification with alkali polyetl¥lene glycol (APm). The EPA Mi:>ile IIx:inerator. EPA has built and operated a nd::>ile .,' •• • i itx:inerator to destroy bazardws organic substances. The system is IIOJIlted on four trailers. en the first trailer a 4-foot inside dianeter by l6-foot lang rotary kiln is :anmted which vaporizes waste at l800oF. The gas fran the kiln passes into a secondary ccnDustion chamber an a secorxi trailer where carbustion is carpleted at 2200oF. The third trailer contains a water spray for coolin] the flue gas, a filter for particulate rEm'Nal, and an alkaline scrubber for neutralization of aqid gases formed when chlorinated organics are incinerated. Gases are drawn through the systan by an iIXiuced draft fan which naintains a negative pressure thrc:ugOCut to ensure that IX) toxic gases escape. The cleaned gases are discharged tllrough a 40-foot high stack. Continuoo..s uonitors, uounted on the fourth trailer neasure tenperature, flow rate, and the carposition of stack gases. Autaratic and manual slnlt-down controls assure safe operations. The system was used at a site in Missouri to bunl CNer 2 million lbs of dioxin-bearing solids, includinJ soil, druns, arxl trash, and approxinately 180,000 lbs of dioxin-contaminated liquid wastes. The system daronstrat.ed 99.9999 percent IRE in the dioxin constituents of the wastes. While EPA has invested CNer $10 million in the developnent of this system, based on the experience gairied, a duplicate could be built at roughly half that cost. A number of engineering Changes have recently been made which slxmld significantly inprCNe the operation of the systan. Cyclones have been installed between the kiln and aftemurner to collect the heavy load of dust carry CNer that otherwise accumulates in the afterburner. This carryover fran burning dusty soils was causing considerable <Ja.m-ti.rre in the incinerator. Operating costs are expected to decline dramatically as capacity and reliability are increased and additional operating experience is obtained. Over one-third of these costs were for sarrpling and analysis necessary to prove that the process waters arx1 kiln ash should not be subject to regulation as a hazardoos waste. The rrr:::i:>ile incinerator is both a -technological and institutional success. l\bt only \\ere the wastes successfully destroyed but an effective plblic :participation program was instituted, a pennit was issued for the facility, ani the solid residues am scrubber waters were delisted. 8 |