281Environmental Analysis Tools
However, in many cases the screening-level benchmarks represent concen-
trations lower than necessary to protect receptors or the designated measure-
ment endpoint. In such cases, site-specic benchmarks can be identied or
developed that represent the endpoint species, lifecycle stages of concern, and
site specic conditions rather than the broad-based and conservative bench-
marks used in the screening assessment. For example, if there is no salmonid
(e.g., trout) habitat associated with the site because the natural water tempera-
tures are too high, water-quality benchmarks for warm water sheries (which
are usually higher concentrations) may be more appropriate. Similarly, since
juvenile forms of most animal ...