1 Evan K. Nyer is a vice president with ARCADIS Geraghty & Miller Inc., where he is responsible for maintaining and expanding the company's technical expertise in geology/hydrogeology, engineering, modeling, risk assessment, and bioremediation. He has been active in the development of new treatment technologies for many years. His areas of research interest include biological treatment, suspended solids separation, chemical oxidation, in situ treatment, air treatment systems, and the application of new technologies to ground water cleanup. He has been responsible for the strategies, technical design, and installation of more than 200 ground water and soil remediation systems at contaminated sites throughout the United States.