US EPA

1427152 

Technical Report 

Silos 1 and 2 removal action: Implementation of a non-time critical removal action at a federal facility 

Nixon, DA; Heckendorn, LA; Allen, RB 

1992 

NTIS/02987671 

GRA and I 

GRA and I 

One of the Remedial Investigation/Feasibility Study (RI/FS) identified operable units, Operable Unit 4, at the Fernald Environmental Management Project (FEMP) includes the two K-65 Silos (Silos 1 and 2), the metal oxide silo (Silo 3), the unused Silo 4 and the potentially contaminated soils surrounding the waste storage sites. It was determined by the Department of Energy (DOE), as the lead agency at the FEMP, that a non-time critical removal action was necessary for Silos 1 and 2. The scope of this removal action can be broadly defined as ''reducing the chronic radon emissions and the control of potential releases of residues from Silos 1 and 2.'' The removal action was conducted pursuant to the Consent Agreement Under CERCLA 120 and 106 (a) between the DOE and United States Environmental Protection Agency (US EPA) as Removal Number 4: Silos 1 and 2. An Engineering Evaluation/Cost Analysis (EE/CA) for the K-65 Silos Removal Action was prepared to evaluate the removal action alternatives, using the preliminary RI/FS data, to support the selection of the preferred alternative. The objective of this removal action as stated in the EE/CA were as follows: To reduce routine emissions of radon from the K-65 Silos to maximum extent practical within the context of the removal action. To decrease, mitigate, or otherwise control the threat of K-65 residues released in significant quantities as a result of dome failure caused by a tornado. As selected by the K-65 Silos EE/CA, the alternative implemented for this removal action consisted of covering the K-65 residues with a gas barrier material, a bentonite slurry, that is retarding the emanation of radon gas into the space between the residues and the silos domes. 

Containment Systems; *Feed Materials Production Center; *Radon; *Remedial Action; Bentonite; Compliance; Containment; Cost Estimation; Emission; Feasibility Studies; High-Level Radioactive Wastes; Monitoring; Radiation Protection; Radium 226; Regulations; Slurries; Storage Facilities; Thorium 230; US Superfund; Uranium 234; Uranium 238; Waste Retrieval; Meetings; EDB/052002; EDB/420205; EDB/054000