| This document was prepared by Serena Ryan, a National Network for Environmental Management Studies (NNEMS) grantee under a fellowship from the U.S. Environmental Protection Agency. The objective of this report is to provide an overview of remedial accomplishments at 12 current or former NPL sites affected by DNAPL and/or associated dissolved, vapor, or sorbed phase contamination. This report summarizes relevant information about these sites, including site sizes, contaminants, technologies, concentration level reductions, and current remedial status. A discussion of DNAPL characteristics, fate, and transport, as well as a summary of DNAPL remediation technologies, is also included. Case studies of individual sites are also provided. |