The Twelfth Edition of Treatment Technologies for Site Cleanup: Annual Status Report (ASR) documents the status, achievements, and trends associated with treatment technologies at National Priorities List (NPL) sites for remedy decisions between 1982 and 2005. Information collected and analyzed for this report helps document the progress and contributions of technologies implemented at NPL sites. In addition to presenting information about remedy decisions based solely on records of decision (ROD), this report provides data about projects that relate to their operational status and treatment accomplishments.

"September 2007." "EPA-542-R-07-012."

The Twelfth Edition of this report, published by the EPA Office of Superfund Remediation and Technology Innovation (OSRTI) in September 2007, documents treatment technology applications at more than 1,900 soil and groundwater cleanup projects at National Priorities List (NPL) sites. The status of more than 1,200 projects included in the ASR Eleventh Edition is updated, and information about 192 new projects derived from Records of Decision (ROD) signed from 2002 through 2005 is added. The report also includes a special section about on-site containment remedies. The ASR is based on the analysis of over nearly 3,000 RODs signed since 1982 at 1,536 NPL sites. The online version includes new downloadable spreadsheets with the data for several of the key tables and figures in the report. Specific information about each technology application included in the ASR Twelfth Edition is available in the ASR Remediation Database.