1. U.S. EPA, NHEERL, Atlantic Ecology Division & University of Rhode Island, Graduate School of Oceanography, Narragansett, Rhode Island 02882
2. U.S. EPA, NHEERL, Atlantic Ecology Division, Narragansett, Rhode Island 02882
3. Science Applications International Corporation, 1247B Eglin Parkway, Shalimar, Florida 32579