This report presents cost and performance data for the application of on-site incineration at the Rose Disposal Pit Superfund Site (Rose Site) in Lanesborough, Massachusetts. A rotary kiln incinerator was operated from February 1994 to July 1994 as part of a remedial action.
The Rose site is a 1.5-acre section of a 14-acre residential lot located in Lanesborough, Massachusetts. From 1951 through 1959 and possibly later, wastes from a nearby manufacturer were disposed of in an open trench at the site. Soil at the Rose Site is contaminated with PCBs, as well as volatile organic compounds (VOCs) including trichloroethylene, benzene, and vinyl chloride. Measured concentrations of PCBs at the site were as high as 440,000 mg/kg.
In 1988, EPA signed a Record of Decision (ROD) specifying on-site incineration as the selected remedy for the contaminated soil at the Rose Site. In 1989, EPA released an Explanation of Significant Differences (ESD) which outlined EPA's agreement with the responsible party to conduct complete source remediation. To achieve complete source remediation, the responsible party excavated and incinerated a greater volume of contaminated soil than that specified in the ROD. The ROD set a Destruction and Removal Efficiency (DRE) standard for PCBs of 99.9999%.
The remediation activities performed at the Rose Site also included the construction and operation of a groundwater treatment system, However, unless otherwise indicated, only issues relating to on-site incineration are discussed in this report.
The excavated soil at the Rose Site was crushed and blended before incineration. The blended soil entered the rotary kiln at the flame end via a screw auger and passed through the kiln co-current with the exhaust gas. Kiln ash was quenched in a water bath, while the exhaust gases were directed to a secondary combustion chamber (SCC) for further destruction of contaminants in the waste feed.
The air pollution control train consisted of a cyclone separator for removal of larger particulate matter, a quench tower, a baghouse for removal of finer particulate matter, a second quench tower, and a wet scrubbing system designed to remove residual contaminants. Dust removed by the cyclone separator and the baghouse was discharged to the ash quench bath. Wastewater from the quench towers and the scrubbing system was also discharged to the ash quench bath. All of the solid waste generated by the system was removed with the incinerator ash and landfilled on site.
During its five months of operation, the incinerator processed approximately 51,000 tons of contaminated soil. Treatment performance and air monitoring data collected during this application indicated that all required performance and standards emissions were achieved.
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