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These three removal actions will be screened for their appropriateness in each of the three Areas A (sump only), C, and J, in Section 5.0. Sections 4.1, 4.2, and 4.3 provide a description of tasks involved in each of the three alternatives. 4.1 REUSE OF THE FACILITY This alternative involves the removal of the contents of the sumps/pit and a clean up of the facility for reuse by the client, as described in the following steps: • Removal and Disposal: Contents of the pit and sumps will be collected in 55-gallon drums and sent to an off-site permitted TSD facility for treatment and disposal. Contents from different sumps will be collected in separate containers and clearly labeled, before their transportation to the TSD facility. • Cleanup of the Pit/Stumps: The pit and sumps will be cleaned, using one or a combination of the following three techniques: Steam Cleaning: High pressure steam at temperatures between 300°F and 500 °F will be used to clean the surfaces. The condensate will be collected, analyzed for contaminant concentrations, and disposed of in accordance with the regulations for the specific contaminant. Sand Blasting: Sand blasting will involve abrasive cleaning of the surfaces of the pit, using sand and compressed air. Used sand will be collected and analyzed for the extent of contamination to determine a disposal method to achieve regulatory compliance. A wet blast can be used, in case excessive dust causes a problem. Chemical Cleaning: Nonflammable, commercially available solvents can be used to leach out the contaminants from the concrete surfaces of the pit, up to a depth of 1/2 to 1 inch of the concrete. Used solvents and leachate are collected and disposed of in compliance with regulations. All unaffected areas will be covered and protected during the cleaning operation. The clean-up will be conducted under a double-walled containment provided around the sump/pit being cleaned. Two layers of 20 mil-thick plastic sheets with an air gap placed between them will provide the double-walled containment. This containment will prevent migration of airborne particles/contaminants from affecting the environment outside the containment. Workers inside the containment area will be provided with compressed breathing air and level B protection, in accordance with the Occupational Safety and Health Administration (OSHA) regulations. These engineering controls and measure shall insure that the clean-up operation at Site 5 is not hazardous to public health or the environment. 13