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Record of Decision System (RODS)

HANFORD 100-AREA (USDOE)

Abstract

Site Name:  HANFORD 100-AREA (USDOE)
Address:  100 AREA 
City & State:  BENTON COUNTY  WA  99352
County:  BENTON
 
EPA ID:  WA3890090076
EPA Region:  10
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Amendment
ROD ID:  EPA/541/R-97/044
ROD Date:  04/04/1997
Operable Unit(s):  01
 
Media:  Groundwater,Soil
 
Contaminant:  Radionuclides, cadmium, lead, zinc, chromium, mercury.
 
Abstract:  The U.S. Department of Energy's (DOE's) Hanford 100 Area lies at the north end of the Hanford Site in Benton County, Washington State. The 100 Area Superfund Site is composed of six non-contiguous reactor areas containing the nine retired plutonium production reactors and their ancillary facilities. Large amounts of cooling water flowed through the reactor cores and became contaminated with radionuclides and other waste. Soil and underlying groundwater were contaminated when cooling water was disposed in cribs and trenches and leaked from water transfer systems. Solid wastes contaminated with radionuclides were buried in unlined trenches.The Hanford Site was listed on the National Priorities List (NPL) in July 1989. The original remedy was finalized in 1995.
 
Remedy:  This amendment changes components of the selected remedy for the Hanford 100 Area radioactive liquid effluent disposal sites and clarifies the role of revegetation of remediated sites. The number of sites selected to receive the remedy of excavation, treatment, and on-site disposal has been changed from 37 to 71. In addition, the treatment step has been eliminated because it is not cost effective.
 
Text:  View full-text ROD [ 42K ]
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