Current Conditions Risk Assessment for the 300-FF-5 Groundwater Operable Unit.

Miley, T. B. ; Bunn, A. L. ; Napier, R. A. ; Peterson, R. E. ; Becker, J. M.

Technical Information Center Oak Ridge Tennessee

关键词: Ground water;    Risk assessment;    Contaminants;    Remedial action;    Uranium;   

RP-ID  :  DE2008927499

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

This report updates a baseline risk assessment for the 300 Area prepared in 1994. The update includes consideration of changes in contaminants of interest and in the environment that have occurred during the period of interim remedial action, i.e., 1996 to the present, as well as the sub-regions, for which no initial risk assessments have been conducted. In 1996, a record of decision (ROD) stipulated interim remedial action for groundwater affected by releases from 300 Area sources, as follows: (a) continued monitoring of groundwater that is contaminated above health-based levels to ensure that concentrations continue to decrease, and (b) institutional controls to ensure that groundwater use is restricted to prevent unacceptable exposure to groundwater contamination. In 2000, the groundwater beneath the two outlying sub-regions was added to the operable unit. In 2001, the first 5-year review of the ROD found that the interim remedy and remedial action objectives were still appropriate, although the review called for additional characterization activities.