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Record of Decision System (RODS)



Address:  5025 EVANSTON AVE 
City & State:  MUSKEGON  MI  49442
EPA ID:  MID006030373
EPA Region:  05
NPL Status:  Currently on the Final NPL
ROD Type:  Amendment
ROD ID:  EPA/AMD/R05-92/198
ROD Date:  07/22/1992
Operable Unit(s):  01
Media:  Soil Sludge
Contaminant:  SVOCs
Abstract:  SITE HISTORY/DESCRIPTION: The 85-acre Bofors Nobel site contains an active specialty chemical production plant in Egelston Township, Muskegon County, Michigan. Site features include an unused landfill, an active ground water pumping and treatment system, and 10 abandoned sludge lagoons. Onsite wetlands lie within the floodplain of Big Black Creek, which runs through the southern portion of the site. The site overlies a lacustrine aquifer, a potential drinking water source, which has been contaminated as aresult of site activities. From 1960 to 1976, the plant produced alcohol- based detergents, saccharin, pesticides and dye intermediates, discharging sludge, wastewater, and waste liquids into the 10 onsite lagoons. Subsequent state investigations identified eight of the onsite lagoons as potential sources of ground water contamination. In 1976, the state restricted wastewater discharge from the site, and a ground water pump and treatment system was installed to pretreat waste prior to discharge to the POTW andto treat contaminated ground water in the lacustrine aquifer. This ROD amends a 1990 ROD written by the state, which consisted of onsite incineration and onsite landfilling of lagoon area soil, construction of RCRA-type secure landfill cells to hold non-incinerated material and ash from the incinerated sludge, and construction of an onsite ground water treatment facility with extraction and onsite treatment of contaminated ground water. Since that time, an EPA predesign site investigation was conducted as part of the remedial design which revealed that a larger volume of contaminated material was present at the site than was originally believed, and that there would be inconsistent treatment of contaminated material with the same level of risk. Additionally, the cost and logistics involved in incineration were greater than originally believed, and the large increase in volume would also significantly lessen the effective reduction in risk achieved by incineration. A subsequent final ROD will address other contaminated soil and establish clean-up criteria for ground water. This ROD amendment replaces incineration as the treatment technology for soil and sludge. The primary contaminants of concern affecting the soil and sludge are semi-VOCs including benzidine and dichlorobenzidine. PERFORMANCE STANDARDS OR GOALS: EPA has determined that landfilling of contaminated soil and sludge without treatment provides the equivalent level of protection to human health and the environment from site-related risks as that provided by the remedy in the 1990 ROD. Ground water clean-up criteria will be addressed in a subsequent final ROD. INSTITUTIONAL CONTROLS: Not applicable.
Remedy:  SELECTED REMEDIAL ACTION: The selected amended remedial action for this site includes excavation and onsite disposal of approximately 767,000 cubic yards of contaminated sludge and soil in onsite RCRA-type secure landfill cells, constructed as part of the original remedial action; expanding and upgrading the unused landfill adjacent to the lagoon area to meet the RCRA standards; storing lesser contaminated material in the unused landfill; installing extraction wells downgradient of the unused landfill as a tertiary leachate containment system; and monitoring the landfill and existing leachate collection system. This ROD amendment does not address any issue associated with ground water treatment. The estimated present worth cost for this amended remedial action is $45,498,216, which includes an annual O&M cost of $89,030 for 3 years.
Text:  View full-text ROD [ 28K ]
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