Feasibility Study for the Explosive Washout Plant Operable Unit (Building 489), Umatilla Depot Activity.
Abstract
This feasibility study (FS) for the Explosive Washout Plant (also designated as Building 489 or Site 5) Operable Unit at the U.S. Army Depot Activity at Umatilla (UMDA) has been prepared to evaluate potential remedial alternatives for mitigating explosive contamination at this site. It was conducted in accordance with the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA) as amended by the Superfund Amendments and Reauthorization Act of 1986 (SARA). This FS provides a summary of the remedial investigation and risk assessment information developed by USAEC/Dames & Moore, remedial action objectives, identification and screening of potential remediation technologies, and a detailed evaluation of alternatives assembled from the most promising technologies. The alternatives evaluated in detail are No Action, Sump Cleanout and Controlled Access, Hydroblasting, Hot Gas Decontamination and Demolition and Disposal. Each of the alternatives (except No Action and Sump Cleanout/Controlled Access) also include pretreatment steps (such as solvent flushing of process equipment and solvent wiping metal surfaces) and post treatment by demolition/disposal. The alternatives were evaluated for overall protection of human health and the environment; compliance. with applicable or relevant and appropriate requirements (ARARs); long-term effectiveness; reduction of toxicity, mobility, and volume; short-term effectiveness; implementability; and cost. With the exception of the No Action alternative, all the alternatives meet requirements for overall protection of human health and the environment, compliance with ARARs, short-term effectiveness and implementability.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 15, 1993
- Accession Number
- ADA298423
Entities
People
- Armand A. Balasco
- Lawrence R. Woodland
- Richard C. Bowen
Organizations
- Arthur D. Little