Ecological Hazard Assessment of Contaminants of Emerging Concern In the U.S. Great Lakes Basin Part B - Supplemental Document

The principal purpose of this document is to present the rationale, derivation methods, and numeric values of CEC screening values (SVs) for assessing relative hazard to freshwater fsh from chronic aqueous exposures in surface water, to aid in improving management strategies for fsh and wildlife resources. The SVs presented here are neither regulatory values nor absolute toxicity thresholds. The USFWS does not establish national regulatory screening values for contaminants, and estimation of absolute toxicity thresholds was not a goal of this project.