Stewart J. Smith, R.G., a Senior Hydrogeologist, holds a B. S. in Geology and an M.S. in Hydrology from the University of Arizona. He has worked in the mining and environmental fields for 38 years, and has been with Hydro Geo Chem for 28 years. He has managed site characterization and remediation activities, designed soil and groundwater remediation systems, and developed and calibrated numerical models as predictive and interpretive tools. He has also explored for economic metal deposits and performed ore reserve estimates.