Risk assessment guidance document for the UMTRA project groundwater remediation phase
Technical Report
·
OSTI ID:10141917
The purpose of the groundwater remedial activities at the Uranium Mill Tailings Remedial Action (UMTRA) sites is to reduce, control, or eliminate risks to human health and the environment. This is in accordance with Subpart B of 40 CFR 192. According to this regulation, the need for groundwater restoration is based upon US Environmental Protection Agency (EPA)-defined groundwater cleanup standards and must be consistent with the National Environmental Policy Act (NEPA) process. Risk assessments will be used in the UMTRA Groundwater Program to aid in the evaluation of sites. Risk assessments are conducted for four purposes: (1) Preliminary risk assessments are used to aid in prioritizing sites, scope data collection, end determine if a site presents immediate health risks. (2) Baseline risk assessments provide a comprehensive integration and interpretation of demographic, geographic, physical, chemical, and biological factors at a site to determine the extent of actual or potential harm. This information Is used to determine the need for remedial action. (3) Risk evaluation of remedial alternatives is performed to evaluate risks to humans or the environment associated with the various remedial strategies. (4) After remediation, an evaluation of residual risks is conducted. The information gathered for each of these risk evaluations is used to determine the need for subsequent evaluation. Several sites may be eliminated after a preliminary risk assessment if there is no current or future threat to humans or the environment. Likewise, much of the data from a baseline risk assessment can be used to support alternate concentration limits or supplemental standards demonstrations, or identify sensitive habitats or receptors that may be of concern in selecting a remedy.
- Research Organization:
- USDOE Albuquerque Field Office, NM (United States). Uranium Mill Tailings Remedial Action Project Office
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-91AL62350
- OSTI ID:
- 10141917
- Report Number(s):
- DOE/UMTRA--400680-0000; ON: DE93010591
- Country of Publication:
- United States
- Language:
- English
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