Methods/Indicators for Determining When Metals Are the Cause of Biological Impairments of Rivers and Streams: Species Sensitivity Distributions and Chronic Exposure-Response Relationships from Laboratory Data
This final report details the methodology for statistical analysis of data on metals toxicity to aquatic organisms and application of analysis results to Stressor Identification. There are 12 appendices which accompany the report to provide source data along with graphical and tabular output.
Due to the size and complexity of these appendices - they are not coded for accessibility. If you need help with these attachments, please phone 513-569-7598 or email the NCEA Technical Information Unit (TIU) of Cincinnati for assistance.
Over a thousand water bodies in the United States are listed by states as biologically impaired. For many of these, the cause of the impairment is also reported as unknown. Before an appropriate management action can be formulated, the cause of the biological impairment must be determined. The U.S. Environmental Protection Agency Stressor Identification Process (U.S. EPA, 2000) is a formal method for identifying causes of such impairments. Defensible causal analyses require knowledge of the mechanisms, symptoms, and stressor-response relationships for various specific stressors as well as the ability to use that knowledge to draw appropriate conclusions.
This report provides information on the effects of metals on laboratory animals which may be used in the strength-of-evidence step of the Stressor Identification (SI) Process to help determine whether metals contribute to biological impairments.
|Mar 2005||External review of the draft document.|
|July 2005||Completion of the final document.|
|Jan 2008||EPA releases the final document.|
|TBD||Electronic SSD and Exposure Response Library loaded to CADDIS|
This download(s) is distributed solely for the purpose of pre-dissemination peer review under applicable information quality guidelines. It has not been formally disseminated by EPA. It does not represent and should not be construed to represent any Agency determination or policy.
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