1. Project title: Methodology for Evaluating Stewardship Requirements
    PI: F. Parker
    Staff: F. Sanchez, J. Clarke
    Sponsor: CRESP (Consortium for Risk Evaluation with Stakeholder Participation).
    Abstract: The objectives of this research project are to (i) evaluate stewardship requirements for contaminant isolation facilities, (ii) estimate the types and likelihoods of events indicative of unanticipated and undesirable performance (e.g., erosion, bio-intrusion, standing water, etc.), event consequences, responses, costs and risks, (iii) do probabilistic analysis of the costs and risks of stewardship of DOE facilities, and (iv) compare these results to no action over time.

  1. Project title: Evaluation of Mercury and Metals Leaching from Coal Combustion Residues Produced Using Enhanced Mercury Emissions Control Technology
    PI: F. Sanchez
    Co-PI: D.S. Kosson
    Sponsor: USEPA
    Abstract:     In December 2000, EPA announced its intent to regulate mercury emissions from coal-fired electric utility stream generating plants. The burning of coal in electric utility boilers generates residual materials including fly ash, bottom ash, boiler slag, and wet flue gas desulfurization (FGD) scrubber solids and sludges. These residual materials are collectively referred to as “coal combustion residues” (CCRs). Changes in Hg control technology requirements for coal-fired electric utility power plants will cause changes in the dominant chemistries of fly ash and wet FGD scrubber solids and sludges. Within this framework, EPA/OSW has been asked to provide guidance on appropriate testing for evaluating the CCRs resulting from the new mercury control technologies. The specific objectives of this project are to (i) evaluate a new leaching test framework for assessing the effect of new mercury emission controls on the leaching behavior of coal combustion residues (CCRs), and (ii) use test results in conjunction with release models and site-specific information to estimate the long-term release of mercury and other inorganic contaminants of potential concern.