Methods for Deriving Pesticide Aquatic Life Criteria - Reviews of Environmental Contamination and Toxicology - page 98

from surrogate species to derive criteria. Utilizing partition coefficients, criteria may be
harmonized across media to ensure that levels set to protect one compartment do not
result in unacceptable levels in other compartments.
Several methodologies derive criteria from entire data sets through the use of
statistical extrapolations; other methods utilize only the lowest (most sensitive) data
point or points. Utilization of entire data sets allows derivation of confidence limits
for criteria, and encourages data generation.
Criteria derivation methodologies have improved over the past two decades as
they have incorporated more ecological risk assessment techniques. No single
existing methodology is ideal, but elements of several may be combined, and when
used with newer risk assessment tools, will produce more usable and flexible criteria
derivation procedures that are protective.
Acknowledgments We thank the following reviewers: Lawrence R. Curtis (Oregon State
University), Brian Finlayson (California Department of Fish and Game), Evan P. Gallagher
(University of Washington), John P. Knezovich (Lawrence Livermore National Laboratory), and
Marshall Lee (California Department of Pesticide Regulation). This project was funded through a
contract with the Central Valley RWQCB. Mention of specific products, policies, or procedures
does not represent endorsement by the Regional Board. The contents also do not necessarily
reflect the views or policies of the USEPA nor does mention of trade names or commercial products
constitute endorsement or recommendation for use.
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