Alexandros Spiliotopoulos, Ph.D., S.S. Papadopulos & Associates Inc. Alex Spiliotopoulos holds a B.Sc. in Civil Engineering from the University of Patras, Greece, and Ph.D. in Environmental Engineering from the University of Vermont under the advisement of Drs. George Pinder and George Karatzas, developing optimization techniques for groundwater management problems. He has been with SSP&A for 4 years, focusing on the design of data gathering efforts, development and management of databases, and application of analytical and numerical models to support decision-making. He has provided technical and modeling support to several fuel-spill investigations for NYSDEC.

Karen A. Krajenke, Environmental Assessment and Remediation Karen graduated Hofstra University in 2002 with a BS in Geology. She has been working with Environmental Assessment and Remediations as a Geologist and Project Manager since 2002. Karen has been working recently with leading experts in the Stable Isotope field and has been involved with implementing cutting edge geophysical techniques at various sites. Karen’s field experience and involvement with multiple drilling techniques provides an invaluable role to support, train and assist other staff geologists.

Joseph E. Haas II, M.S., PE, New York State Department of Environmental Conservation Joe has 19 years experience working as a state regulator managing a remedial section. He holds both Engineering Geologist and Hydrogeologist specialty licenses. Joe has been involved in research with representatives of the United States Environmental Protection Agency. These research efforts have been credited as having made significant contributions to the understanding of the characteristics of MTBE in the sub-surface environment and having influenced the national debate on the use of MTBE in gasoline. The Office of Research and Development acknowledged his contributions, in 2002, in the form of an award for Exceptional Support to ORD.

Matthew J. Tonkin, S.S. Papadopulos & Associates Inc. Matt Tonkin has been with SSP&A for 12 years. His focus is on the design of data gathering efforts; the synthesis and interpretation of data; and, the application of models to support decision-making. He has completed contracts to the USGS, USEPA and California Department of Water Resources in the areas of contaminant transport and model uncertainty analysis. Matt is a former member of the Interstate Technology Research Council (ITRC) MTBE team, and has provided support to NYSDEC at several fuel-spill investigations and remedies.

Daniel F. Cornacchiulo, Environmental Assessment and Remediations Daniel F. Cornacchiulo, Ph.D., Engineer/Hydrogeologist has ten years of experience in the environmental consulting field. Dan’s modeling expertise includes development of a finite-difference computer code for tidal influence on unconfined aquifers. His current research involves numerical modeling of pollution source identification using the Marching-Jury Backward Beam Equation (MJBBE) and the Quasi-Reversibility methods. This research includes stability analysis of the backward methods, applying real life conditions such as sampling densities and uncertainties for the MJBBE. Dr. Cornacchiulo holds a B.A.Sc. in geology from the SUNY Binghamton and a M.Sc. and Ph.D. in Civil Engineering and Engineering Mechanics at Columbia University.

Donald A. Trego, Environmental Assessment and Remediations Don graduated in 1993 from the Pennsylvania State University with a bachelors of science in Environmental Resource Management. He has over 14 years of experience in the groundwater remediation industry. Don has been involved in numerous research initiatives with the New York State Department of Environmental Conservation (NYSDEC), the United States Environmental Protection Agency (USEPA), and the United States Geological Survey (USGS). As project manager, Don was a co-recipient of the 2004 National Ground Water Association’s (NGWA) – Outstanding Groundwater Remediation Project award. He currently is the Vice president of a respected environmental consulting firm located on Long Island, NY.