Five Year Review - Five-Year Reviews generally are required by CERCLA or program policy when hazardous substances remain on site above levels which permit unrestricted use and unlimited exposure. Five-year reviews provide an opportunity to evaluate the implementation and performance of a remedy to determine whether it remains protective of human health and the environment. Read more about Five Year Reviews.
Feasibility Study - The Feasibility Study (FS) is the mechanism for the development, screening, and detailed evaluation of alternative remedial actions.
The Final Coeur d’Alene Basin Feasibility Study (FS) was issued by EPA Region 10 on October 19, 2001. The FS report describes the cleanup objectives and presents an evaluation of the alternatives considered to reach the cleanup goals. The FS alternatives incorporated cleanup alternatives identified by other parties including the States of Idaho and Washington and the mining companies. The FS analyses were conducted through the RI/FS process of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), 42 U.S.C 9601 et seq., and the implementing regulations in the National Oil and Hazardous Substances Pollution Contingency Plan (NCP), 40 CFR Part 300. The information evaluated in the RI/FS process was used to identify a proposed cleanup plan that will be released for public review and comment on October 29, 2001.
Record of Decision (ROD) - The Record of Decision (ROD) is a public document that explains which cleanup alternatives will be used to clean up a Superfund site. The ROD for sites listed on the NPL is created from information generated during the RI/FS. Read more about Records of Decisions (RODs).
Proposed Plan - Information gathered in the RI/FS is used to develop a Proposed Plan, which describes the various cleanup options under consideration and identifies the option EPA prefers. EPA invited community members to a public meeting to express their views and to discuss the plan with EPA officials.
Remedial Investigation - After a site is listed on the NPL, a remedial investigation/feasibility study (RI/FS) is performed at the site. The remedial investigation serves as the mechanism for collecting data to:
Many changes were made to the Feasibility Study in response to comments received during the comment period (December 20, 2000 through April 12, 2001). The report was improved as a result of the comments received. A written response to comments is provided in Appendix I to the FS report. While public reviews and written responses to comments are not normally done on draft feasibility studies, this level of effort seemed appropriate given the high level of interest in this site.
The Coeur d’Alene Basin FS is presented in three parts:
Due to the size of the printed document, the Coeur d’Alene Basin FS is available as CD-Rom (containing the complete document including all volumes and appendices), the Overview Report (Part 1 only) or as the full report (four 4-inch binders). To request a copy of the FS, please contact Anne Dailey (206-553-2110).
Part 1 = Overview Report
Part 2 = Human Health Alternatives
Part 3 = Ecological Alternatives
The FS overview report (part 1) is available below. Due to the large size of this document, we've broken it out into smaller sections for home users to download.Key Text portions as follows (October 2001):
Ecological Risk Assessment - An ecological risk assessment evaluates the potential adverse effects that the site contamination may have on the plants and animals that make up ecosystems.
- characterize site conditions;
- determine the nature of the waste;
- assess risk to human health and the environment; and
- conduct treatability testing to evaluate the potential performance and cost of the treatment technologies that are being considered.
- Read more about RI/FS.