Superfund Groundwater Remedy Performance

Tuesday, August 8, 2017: 4:00 p.m.
Linda Fiedler , USEPA, Washington DC, DC

The US Environmental Protection Agency (EPA) Superfund statutes, policy and guidance define Superfund’s groundwater cleanup mission by providing an expectation that groundwater will be returned to its beneficial use. In this presentation EPA will present the findings of an analysis of groundwater remedy performance at selected Superfund sites, ranging from less difficult cleanups involving small dilute groundwater plumes in simple hydrogeologic settings, to more difficult cleanups such as large plumes with high concentrations, complex hydrogeologic settings, and dense nonaqueous phase liquids. The study examines key aspects of the groundwater remedies, including progress towards achieving remedial action objectives (RAOs), cleanup approaches applied, contaminants addressed, hydrogeology, and the magnitude of cleanup. Results of this analysis show that, for the range of Superfund sites and plumes studied, there have been significant reductions in contaminant concentrations and plume size, and in some cases, the groundwater plumes have been remediated to stringent RAOs, including those based on federal and state drinking water standards.

Linda Fiedler, USEPA, Washington DC, DC
Linda Fiedler is an environmental engineer with USEPA’s Technology Assessment Branch within the Superfund Office. In her more than 30 years with EPA, she has also worked within the water, hazardous waste, underground storage tank, and federal facility program offices. Linda has had the lead for preparing many reports, case studies, websites, and databases that compile and assess available information on site characterization and cleanup technologies and document site-specific applications. Linda is currently conducting program analysis on the types of remedies selected in Superfund decision documents and their performance at Superfund sites.