Although ecological risk assessments (ERAs) and natural resource damage assessments (NRDAs) are performed under different statutory and regulatory authorities, primarily the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA), as currently practiced, the activities typically overlap. ERAs performed as part of the response process (typically by the US Environmental Prot...

The purpose and the initial research plan for the UCR EPA chamber was described in detail the report and draft research plan that was submitted to the EPA and the RRWG early in 2002. Updates to the progress on this project are given in a report submitted in August, 2002, immediately prior to the last RRWG meeting. Progress and current status of the project was also discussed with the RRWG Advis...

MARGA OORTGIESEN,1 BELLINA VERONESI,2 GARY EICHENBAUM,3 PATRICK F. KISER,3 AND SIDNEY A. SIMON1 1Departments of Anesthesiology and Neurobiology and 3Department of Mechanical Engineering and Materials Sciences, Duke University Medical Center, Durham 27710; and 2Neurotoxicology Division, National Health and Environmental Effects Research Laboratory, United States Environmental Protection Agency, ...

Although this document was produced with partial funding by the United States Environmental Protection Agency under Assistance Award CR–83234701 to the Health Effects Institute, it has not been subjected to the Agency’s peer and administrative review and therefore may not necessarily reflect the views of the Agency, and no official endorsement by it should be inferred. The contents of this docu...

In this paper, assumptions regarding future land use as a key uncertainty is considered and its impact on risk analysis for contaminated sites is assessed. Risks are assessed for two land use scenarios (current-use industrial and future-use residential) using probabilistic models that incorporate uncertainty and variability in the exposure parameters. Residual risks are calculated for both indu...

The EPA Supersites Research Program needs consistency of metadata and data structures to facilitate information sharing among investigators, analysts, and ultimately secondary data users. Under the auspices of NARSTO a successful mechanism was created to develop and implement reporting standards. The development effort included working closely with Supersites data coordinators, investigators, a...

This summary is intended to accompany the Up-and-Down Procedure (UDP) test guideline and the AOT425StatPgm program and assist the user in interpreting its output. The conclusions in this summary are derived from applying the test procedure to many repetitions of test simulations. More extensive treatment of the simulations can be found in the report “Simulation Results for the AOT425StatPgm Pro...