Toxicity of Metals in Water and Sediment to Aquatic Biota

......................................................................................................................................................839 Introduction.................................................................................................................................................839 Purpose and Scope ..........................................................................................................................840 Acknowledgments ............................................................................................................................840 Methods.......................................................................................................................................................840 Toxicity Tests with Stream Water and Sediment .........................................................................840 Toxicity Tests with Zinc and Copper ..............................................................................................842 Modeling Toxicity of Metals in Stream Water..............................................................................842 Chemical Analysis.............................................................................................................................842 Statistical Analysis ...........................................................................................................................842 Results and Discussion .............................................................................................................................842 Toxicity of Sediment .........................................................................................................................842 Toxicity of Stream Water .................................................................................................................843 Toxicity Thresholds for Zinc and Copper ......................................................................................845 Modeled Toxicity of Zinc and Copper ............................................................................................846 References Cited........................................................................................................................................848