Site-specific criteria have been established
for cadmium, lead, and zinc in the South Fork Coeur d'Alene River
(SFCDA) subbasin. The SFCDA site-specific criteria were developed
using EPA's "resident species" approach that involved
testing the toxicity of cadmium, lead, and zinc in actual site water
near the headwaters of the SFCDA (upstream of pollution from mining
activities) using native species that occur in the subbasin. The
studies included toxicity tests with 14 species, including westslope
cutthroat trout, shorthead sculpin, mayflies, stoneflies, caddisflies,
other insects, and snails.
The following technical documents describe
the criteria derivation for cadmium, lead, and zinc and an evaluation
of whether criteria developed for cadmium, lead, and zinc using
species and water from the headwater reaches of the SFCDA watershed
are appropriate to apply to the lower SFCDA and tributaries.
Application
of Site-specific Water Quality Criteria Developed in Headwater Reaches
to Downstream Waters (DEQ Publication,
December 2002: pdf 819 kb, 102 pages)
Derivation
of Acute and Chronic Criteria for Lead and Zinc (DEQ
Publication, May 2002: pdf 840 kb, 56 pages)
Comparisons
of Cadmium Criteria to the Results Toxicity Testing with Species
Resident to the South Fork Coeur d'Alene River (DEQ
Publication, February 2003: pdf 432 kb, 44 pages)
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