Mark Sprenger is an environmental scientist with the U. S. Environmental Protection Agencys - Office of Superfund Remediation and Technology Innovation - Environmental Response Team. He received a BS in Biology from the State University of New York at Stony Brook, and a MS and Ph.D. in Environmental Science from Rutgers, the State University of New Jersey. His doctorate research and post-doctorate work focused on alteration in metals availability resulting from acid deposition as well as post-doctorate work on the impacts of DDT on a salt marsh. He is a coauthor of the national superfund ecological risk assessment guidance and has been active in the development of ecological risk assessments both in terms of new technical applications and national consistency. His current responsibilities are nationwide and international in scope, with a focus on ecological risk assessments; contaminant fate and transport, particularly in sediments; Site environmental monitoring; and most recently on the assessment of innovative remedial technologies and ecological restoration, from ecological risk perspective, at Superfund and brownfields sites.