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A... <br /> MarkA.Williamson, Ph.D AddanBrown <br /> Principal Geochemist <br /> Education <br /> B.S.,Chemistry, Old Dominion University, 1983 <br /> M.S., Chemistry,Northern Arizona University, 1990 <br /> Ph.D., Geochemistry,Virginia Polytechnic Institute&State University, 1992 <br /> Industry Training <br /> OSHA 40-Hour Hazardous Waste Worker <br /> MSHA Certified Surface Miner <br /> MSHA Certified Underground Miner <br /> Experience <br /> Geochemist/Laboratory Director,Adrian Brown Consultants, Inc.,Denver, CO, 1992-present <br /> -quantitative geochemical evaluation of surface and groundwater, including sample collection and <br /> analysis. Specialist consultant on matters pertaining to acid mine drainage formation,impact and <br /> mitigation. Supervisor of geochemical laboratory facility. <br /> Virginia Polytechnic Institute and State University, Blacksburg, Virginia 1988-1992 <br /> -graduate Research\Teaching Assistant, Department of Geological Sciences. Responsible for lab <br /> sections of Physical Geology for Engineers,metallic and non-metallic mineral deposits. <br /> ARCO Oil and Gas Company, Geochemical Exploration Group, Plano, Texas, 1990 <br /> -conducted research on the geochemical systematics in surficial sediments of the Gulf of Mexico. <br /> Northern Arizona University, Flagstaff, Arizona, 1988 <br /> -chemical Instrumentation Laboratory Supervisor, responsible for operation of all departmental <br /> instrumentation, teaching and supervising operation by faculty and students;performing preventative <br /> maintenance and minor repair. <br /> Tidewater Community College, Virginia Beach, Virginia, 1983-1984 <br /> -chemistry Instructor,lecture and laboratory. <br /> Professional Affiliations Dissertation <br /> Member,The Geochemical Society Thermodynamic and kinetic studies of sulfur geochemistry. <br /> Member,international Union of Applied Geochemistry and Ph.D.dissertation,Virginia Polytechnic institute and State <br /> Cosmochemistry University,Blacksburg,Virginia. <br /> Member,The American Chemical Society,Geochemical Publications <br /> Division <br /> Member,Sigma Xi,The National Scientific Research Society Peer-Reviewed Journals <br /> Member,The New Mexico Geological Society Williamson Mark A.and Rimstidt,I Donald_ "the kinetics and <br /> Thesis electrochemical rate determining step for aqueous pyrite <br /> Metal diagenesis in the near-neutral sediments of high oxidation." Geochim.Cosmochim.Acta.,(58)1995: 5443- <br /> elevation take,White Mountains,east-central Arizona MS 5454. <br /> Thesis,Northern Arizona University,Flagstaff,Arizona. Williamson Mark A.,Kirby Carl S.and Rtmstidt,I Donald and <br /> Nordstrom,D.K. "Quantitative comparison of iron and pyrite <br />