Accession Number : ADA298423

Title :   Feasibility Study for the Explosive Washout Plant Operable Unit (Building 489), Umatilla Depot Activity.

Descriptive Note : Final rept. 19 May 92-15 Dec 93,

Corporate Author : LITTLE (ARTHUR D) INC CAMBRIDGE MA

Personal Author(s) : Woodland, Lawrence R. ; Balasco, Armand A. ; Bowen, Richard C.

PDF Url : ADA298423

Report Date : 15 DEC 1993

Pagination or Media Count : 179

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.

Descriptors :   *CHEMICAL CONTAMINATION, *WATER POLLUTION, *SOIL POLLUTION, *EXPLOSIVE ORDNANCE DISPOSAL, RISK, DECONTAMINATION, TOXIC HAZARDS, WASTE WATER, DEMOLITION, ARMY FACILITIES, ENVIRONMENTAL IMPACT, FEASIBILITY STUDIES, SURFACE WATERS, SOLVENTS, HOT GASES, ENVIRONMENTAL MANAGEMENT, CHEMICAL ORDNANCE, ENVIRONMENTAL PROTECTION, WATER QUALITY, LAND USE, TNT, SOIL TESTS, CONCENTRATION(CHEMISTRY), HIGH EXPLOSIVES, SLUDGE, FLUSHING, WATER ANALYSIS.

Subject Categories : Soil Mechanics
      Ammunition and Explosives
      Water Pollution and Control
      Logistics, Military Facilities and Supplies

Distribution Statement : APPROVED FOR PUBLIC RELEASE