Superfund Record of Decision (EPA Region 10): Commencement Bay Nearshore/Tideflats Site, operable unit 4, Ruston/North Tacoma Study Area, WA, June 1993

Technical Report · Tue Jun 01 04:00:00 EDT 1993

OSTI ID:6951848

This decision document presents the selected remedial action for the Ruston/North Tacoma Study Area, in Ruston and Tacoma, Washington. The EPA has divided the Commencement Bay/Nearshore Tideflats Superfund site into seven operable units (OU's) in order to facilitate the investigation, analysis, and cleanup of this very large site. Four of these OU's are associated with the Asarco smelter: OU 02 - Asarco Tacoma Smelter; OU 04 - Asarco Off-Property (Ruston/North Tacoma Study Area); OU 06 - Asarco Sediments; and OU 07 - Asarco Demolition. The remedy described in this ROD addresses OU 04 and involves the cleanup of arsenic and lead contaminated soils and slag in the Study Area, the residential community surrounding the smelter. This remedy will address the principal threat posed by conditions at the site, which is the ingestion of contaminated soil and dust.

• Research Organization: Environmental Protection Agency, Washington, DC (United States). Office of Emergency and Remedial Response
• OSTI ID: 6951848
• Report Number(s): PB-94-964626/XAB; EPA/ROD/R--10-93/062
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540250* -- Environment
Terrestrial-- Site Resource & Use Studies-- (1990-)
ADMINISTRATIVE PROCEDURES
DECISIONS AND ORDERS
GROUND WATER
HAZARDOUS MATERIALS
HYDROGEN COMPOUNDS
LAND POLLUTION
LAWS
MATERIALS
OXYGEN COMPOUNDS
POLLUTION
POLLUTION LAWS
REMEDIAL ACTION
US SUPERFUND
WATER