William O’Steen is a hydrogeologist in the EPA Region 4 Superfund Technical Services program. He provides technical consultation on investigation and remediation of groundwater contamination at Superfund sites in the region. He is a registered professional geologist in the state of Florida. O’Steen has worked as a hydrogeologist for 31 years, in both state and federal regulatory agencies and as a private consultant. He holds a B.A. in geology from the University of Tennessee (1978) and an M.S. in geology from West Virginia University (1982).