Groundwater Remedial Action Completion
You will need the free Adobe Reader to view the files on this page. See EPA's PDF page to learn more."Guidance for Evaluating Completion of Groundwater Restoration Remedial Actions," (November 2013)
The purpose of this document is to provide guidance for EPA Regions on how to determine when a groundwater restoration remedial action is complete. This guidance recommends evaluating contaminant of concern (COC) concentration levels on a well-by-well basis to assess whether aquifer restoration is complete. In general, to determine that a groundwater restoration remedial action is complete, EPA Regions should use monitoring well-specific conclusions to provide a technical and scientific basis supporting the Agency's conclusion that the groundwater has met and will continue to meet cleanup levels for all COCs in the future.
The Groundwater Remedy Completion Strategy is part of a suite of groundwater guidance being developed by EPA to help focus resources on the information and decisions needed to effectively complete groundwater cleanups. This document follows the Groundwater Roadmap (2011) and the Guidance for Evaluating Completion of Groundwater Restoration Remedial Actions (November 2013). The strategy recommends step-wise planning and decision-making processes for evaluating Superfund groundwater remedy performance, operation and progress toward attainment of remedial action objectives and associated cleanup levels in a reasonable timeframe.
"Methods for Evaluating the Attainment of Cleanup Standards, Vol. 2: Ground Water," (July 1992).
Office of Policy, Planning, and Evaluation Publication EPA/230-R-92-014
Available on-line from OSWER (http://epa.gov/superfund/policy/remedy/pdfs/230r-92014-s.pdf)
This document provides site managers and their contractors with statistical methods for evaluating whether ground water remediation has met pre-established cleanup standards for one or more chemical contaminants at a hazardous waste site. The statistical methods allow for decision making under uncertainty and permit valid extrapolation of information that can be defended and used with confidence to determine whether the site meets the cleanup standard. This document, the second in a series, provides sampling and data analysis methods for the purpose of verifying attainment of a cleanup standard in ground water. The first volume addressed evaluating attainment in soils and solid media.
"Methods for Monitoring Pump-and-Treat Performance," June 1994.
Office of Research and Development Publication EPA/600/R-94/123, NTIS Order Number PB95-125456.
Available on-line from OSWER:
Part 1 - Introduction and Monitoring Hydraulic Containment (http://epa.gov/superfund/health/conmedia/gwdocs/pdfs/ptmethods.pdf)
Part 2 - Monitoring Aquifer Restoration, Evaluating Restoration Success/Closure, Chem-Dyne Site Case Study, and References (http://epa.gov/superfund/health/conmedia/gwdocs/pdfs/ptmethods2.pdf)
This publication provides guidance for monitoring the effectiveness and efficiency of pump-and-treat remediation systems, with emphasis on the "pump" part of the technology rather than chemical enhancements. The report includes sections on monitoring hydraulic containment, monitoring ground-water restoration, evaluating restoration success/closure, a case study, and references. It includes performance criteria, monitoring objectives, and protocols for evaluating effectiveness of containment and restoration systems.
"Close Out Procedures for National Priorities List Sites" (May 2011)
OSWER 9320.2-22 (51 pp, 795K)
Available on-line from OSWER (http://epa.gov/superfund/programs/npl_hrs/closeout/pdf/2011guidance.pdf)
The Close Out Procedures for National Priorities List Sites describes the process for accomplishing remedial action completion, construction completion, site completion, partial deletion and site deletion for National Priorities List sites. This document also provides recommended format and content for relevant close out documents.