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.
Recommended Approach and Groundwater Statistical Tool for Evaluating Completion of Groundwater Restoration Remedial Actions
"Recommended Approach for Evaluating Completion of Groundwater Restoration Remedial Actions at a Monitoring Well," (August 2014) OSWER 9283.1-44
The purpose of this document is to recommend well-specific factors for EPA Regions and other stakeholders to consider in evaluating the groundwater in each monitoring well for purposes of the recommendations discussed in the groundwater restoration completion guidance (OSWER 9355.0-129).
Groundwater Statistical Tool (August 2014)
The Groundwater Statistics Tool is designed to help evaluate contaminant of concern (COC) concentrations on a well-by-well basis to determine whether a groundwater restoration remedial action is complete. The tool is designed to support the U.S. Environmental Protection Agency (EPA) memorandum "Guidance for Evaluating Completion of Groundwater Restoration Remedial Actions" (OSWER 9355.0-129) and comports with principles outlined in the "Recommended Approach for Evaluating Completion of Groundwater Restoration Remedial Actions" (OSWER 9283.1-44).
"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.