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Record of Decision System (RODS)

ALLIED CHEMICAL & IRONTON COKE

Abstract

Site Name:  ALLIED CHEMICAL & IRONTON COKE
Address:  3330 S 3RD ST 
City & State:  IRONTON  OH  45638
County:  LAWRENCE
 
EPA ID:  OHD043730217
EPA Region:  05
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Amendment
ROD ID:  EPA/541/R-98/156
ROD Date:  09/30/1998
Operable Unit(s):  02
 
Media:  Solid Waste
 
Contaminant:  PAH
 
Abstract:  Please note that the text in this document summarizes the Record of Decision for the purposes of facilitating searching and retrieving key text on the ROD. It is not the officially approved abstract drafted by the EPA Regional offices. Once EPA Headquarters receives the official abstract, this text will be replaced.

The Allied Chemical & Ironton Coke site is located in Ironton, Ohio and covers approximately 95 acres. The site operated from 1920 until 1982 and consists of a dismantled Coke Plant and five lagoons that received process wastewater and hazardous solid waste from the former Coke Plant. A 4-acre waste pit called the Goldcamp Disposal Area is also part of the site and an operating AlliedSignal Tar Plant is located within the site boundaries. The Allied Chemical/Ironton Coke site is divided into two operable units (OUs), the Goldcamp Disposal Area (GDA) and the Coke Plant/Lagoon Area (CPLA).

The GDA Record of Decision (ROD) which describes the GDA site remedy was executed in September 1988. The CPLA remedy was finalized through a ROD signed in December 1990, and subsequently amended in July 1995. A second ROD Amendment was issued in September 1997 addressing the ROD soils at CPLA. A third ROD Amendment was issued in September 1998 addressing CPLA.
 
Remedy:  The selected revision for the 457,000 cubic yards of waste material in Lagoons 1-4 includes hot spot excavation and wetland development. The hot spot excavation includes the use of an alternative cleanup standard for carcinogenic polycyclic aromatic hydrocarbons (PAH) established in the 1990 Record of Decision (ROD) for the Coke Plant/Lagoon Area (CPLA) operable unit. The 1990 ROD provided an alternative cleanup standard of 97 ppm for PAH if the chosen remedy of in-situ bioremediation could not achieve the original cleanup standard of 0.97 ppm in a timely manner. The selected change would achieve the 97 ppm alternative cleanup standard with hot spot excavation of approximately 6,800 cubic yards of material. Coal/coke fines and hard tar discovered during the excavation of Lagoons 1-4 will be used as an alternative fuel. Soil from the excavation will be disposed of off-site in a solid waste landfill if the material is non-hazardous. If coal/coke fines, hard tar, or soils are determined to be hazardous they will be treated and/or disposed of appropriately.

After excavation, a wetland ecology will be developed in the Lagoon area. To ensure that the material remaining after the excavation is protective of ecological receptors, a wetland development workplan and yearly ecological reconnaissance will be required.

The selected revision of the incineration of material from Lagoon 5 includes recycling of soft tar back to coke plants, incineration of hard tar, off-site disposal of hard tar and debris commingled with soft tar at an approved hazardous waste landfill, and the use of the remaining coal/coke fines as an alternative fuel. Lagoon 5 contains soft tar and hard tar along with coal/coke fines and debris. The soft tar, which is a tar decanter sludge from the coke plants, is K087 listed waste. Pursuant to Resource Conservation and Recovery Act (RCRA) regulations, K087 listed waste may be recycled back to coke plants. If it appears that capacity is not available at coke plants to recycle the K087, and the soft tar cannot be recycled, it will be treated and/or disposed off site in an approved hazardous waste facility. Hard tar will be sent to an electric utility incinerator. Large debris and hard tar commingled with soft tar that does not meet the acceptance criteria of the recycling facility will be disposed off site at an approved hazardous waste landfill. The coal/coke fines present in Lagoon 5 will be used as an alternative fuel for boilers. If the alternative fuel is hazardous, it will be treated and/or disposed in an approved hazardous waste facility. Uncontaminated brick and concrete uncovered during the excavation of Lagoon 5 will be used as clean fill in Lagoon 5. Other types of debris discovered during the excavation will be disposed of off-site in an approved landfill.

The 8,800 cubic yards of tarry soils on top of Lagoon 5 will be separated by screening into three types of material (tar, debris, and product for use in cement kilns). The tar will be used as an alternative fuel. The debris, which consists of clean brick and concrete, will be placed back on site into the excavated Lagoon 5. Additional product from the tarry soils will be sent to cement kilns for use in their processes. Other types of debris excavated from Lagoon 5 will require disposal off-site in a landfill. The 30,000 cubic yards of site soils which was excavated near the former coke plant will also be placed in the Lagoon 5 excavation to achieve grade for wetland development.

The cost of excavation and wetland development for Lagoons 1-4 is $1.2 million. The cost savings for changing the remedy from in-situ bioremediation to this alternative is approximately $29 million. The present worthcosts of the Amended Lagoon 5 Alternative is $9 million. The cost savings in changing the remedy for Lagoon 5 from incineration to recycling/alternative fuel is approximately $22 million.
 
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