Incineration of Explosives-Contaminated Soil and Reactive RCRA Waste at the Former Weldon Spring Ordnance Works

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Courtesy of Weston Solutions, Inc

ABSTRACT

This paper presents the results of a Combustion Risk Assessment (CRA) and Trial Burn Testing Program for a transportable hazardous waste incinerator at the former Weldon Spring Ordnance Works (WSOW), Missouri, USA. From 1942 to 1945, the Ordnance Works was the largest TNT manufacturing plant in the world, producing approximately 1 million pounds of TNT per day. The Transportable Incineration System (TIS-20), owned and operated by Roy F. Weston, Inc., was used to treat a total of 71,900 tons of TNT-contaminated soil and 79,000 linear feet of wooden TNT pipeline. The Trial Burn testing program included stack sampling for particulate, metals, organics, nitroaromatics, and dioxins. The CRA evaluated the direct and indirect exposure to actual emissions for 10 different receptor scenarios. The Trial Burn testing was successful in demonstrating that all measured emissions were below the regulatory standards. The CRA was successful in demonstrating that exposures to the measured emissions were well below the regulatory-determined risk limit (1E10-6 or 1-in-one million) for all receptor scenarios. Regulatory approval was granted for continuous operations at a reduced feed rate, immediately following the Trial Burn. Approval for full-scale operations was granted within 31 days of completion of the Trial Burn. The coordination among the Missouri Department of Natural Resources (MDNR), U.S. Environmental Protection Agency (EPA) Region VII, Roy F. Weston, Inc. (WESTON®), IT Corporation, and the U.S. Army Corps of Engineers (USACE) allowed for the expedited review of Trial Burn data to permit the continuous operation of the incinerator with no shutdown period following the Trial Burn.

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