William (Bill) Deutsch Senior Geochemist Pacific Northwest National Laboratory

Bill Deutsch holds a B.S. and M.S. in geological sciences from the University of Washington, Seattle. As a geochemist with research and consulting firms for more than 25 years, his project experience includes environmental assessments and investigations of landfills, refineries, pesticides plants/distributorships, military bases, mines and mills, federal weapons facilities and a wide variety of additional industrial sites. In addition, he has participated in remedial designs of sites contaminated with metals, radionuclides, pesticides, solvents, petroleum hydrocarbons and ordnance compounds. Since 1985, Mr. Deutsch has instructed more than 100 courses on groundwater geochemistry and geochemical modeling. He is the author of Groundwater Geochemistry, published by CRC Press and is a senior geochemist at Pacific Northwest National Laboratory operated by Battelle for the U.S. Department of Energy.

Presentation Description
In Situ Precipitation and Encapsulation Technologies
In situ stabilization allows for subsurface immobilization of contaminants by precipitation or encapsulation technologies. The addition of reactive chemicals to the subsurface promotes the precipitation of less soluble minerals containing the contaminants that lowers groundwater concentrations. Other technologies may use reactive chemicals to encapsulate soluble minerals containing contaminants thereby limiting contact of the contaminated solids with groundwater. This session includes a variety of papers describing new and innovative in situ remediation methods for inorganic contaminants.