Sediment Chemistry Investigation: Sampling, Analysis, and Quality Assurance Findings for Klamath River Reservoirs and Estuary, October 2009 - January 2010. In Support of the Secretarial Determination on Klamath River Dam Removal and Basin Restoration, Klamath River, Oregon and California.

The results of the sediment studies reported in this document are part of a series of studies designed to support the Secretarial Determination on Klamath Dam Removal and Basin Restoration in support of the Klamath Hydroelectric Settlement Agreement (KHSA) and the Klamath Basin Restoration Agreement (KBRA). The primary goal of this study was to provide quantitative estimates of the concentrations and distribution of potentially toxic compounds contained within sediment currently trapped behind the four PacifiCorp dams being considered for removal under the KHSA. Elutriate analyses further allow for estimation of the concentrations of chemicals that are likely to be released to the water column should reservoir sediments become suspended or transported through facilities removal.