| The purpose of this optimization review was to evaluate site conditions and identify optimal approaches for conducting a remedial investigation (RI) of the Black Butte Mine (BBM) Superfund Site. The review was conducted using U.S. Environmental Protection Agency (EPA) optimization review methods. This document focuses on the fate and transport of mercury and other trace metals at and downstream of the BBM Superfund Site as a means to focus and streamline the sequence of RI activities. It is expected that this report may form the basis for additional systematic project planning among the optimization review team, project technical team, and stakeholders to develop, review, and finalize RI-specific work planning and implementation documents. |