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Daniel B. Stephens, Ph.D., P.Hg., P.G., is the Principal Hydrologist and Chairman of the Board of Daniel B. Stephens & Associates, Inc. (DBS&A). Dr. Daniel B. Stephens is an internationally recognized expert in hydrogeology, including water resources development, water quality and vadose zone hydrology. He has over 25 years of experience on projects ranging from site characterization to mathematical modeling of flow and transport. Dr. Stephens holds a Ph.D. in hydrology from the University of Arizona, an M.S. in hydrology from Stanford University, and a B.S. in geological science (with honors) from Pennsylvania State University. His expertise and formal training is a blend of hydrogeology, soil physics, and geotechnical engineering. Key areas of expertise include: hydrogeology, groundwater basin analysis, recharge, stream-aquifer interaction, impairment, vadose zone hydrology; allocation of responsibility; contaminant source identification; contaminant fate and transport analysis; applications of groundwater and vadose zone models; unsaturated flow; site characterization and monitoring; natural resource damage; and remedial action programs.
Dr. Stephens has experience in federal and state courts, as well as in administrative hearings on water rights and groundwater and soil contamination cases. He has given numerous depositions and provided expert testimony at trial. Additionally, he has served as a technical liaison to a mediator of a potentially responsible party (PRP) group. Dr. Stephens has been involved in a wide range of contaminated sites, including sites contaminated with chlorinated solvents (PCE, TCE, etc.), perchlorate, NDMA, petroleum hydrocarbons, MTBE, oil field brine, wood treating chemicals, heavy metals, and pesticides, among others. He has published over 100 articles in national and international scientific journals and conference proceedings. Additionally, he is the author of a book entitled Vadose Zone Hydrology which was published in November 1995. |
