USGS

Agenda for the
USGS Workshop on Mercury Cycling in the Environment
Golden, Colorado, July 7-9, 1996

Monday, 7/8/96

Opening, Welcome, and Overview

1:00-1:15 Dave Rickert, Chief, Office of Water Quality

Mercury in the Environment: The Problem

1:15-1:30 Brief Overview of the Historical and Recent Concerns of Mercury Toxicity: Doug Knauer, Wisconsin Department of Natural Resources
1:30-2:15 Mercury in Fish and Aquatic Food Webs: Jim Wiener, NBS
2:15-3:00 Mercury Exposure and Health Risks to Piscivorous Wildlife: Mike Meyer, WDNR
3:00-3:30 BREAK
3:30-4:00 Sources of Mercury to the Environment: Gerald Keeler, University of Michigan
4:00-4:30 Atmospheric Transport, Reactions, and Deposition: Gerald Keeler, University of Michigan
4:30-5:00 Overview of the National Atmospheric Deposition Program Mercury Deposition Network Molly Welker and Joe Tokos, NADP and Frontier Geosciences
5:00-5:30 Recent Advances in Methods for Sampling and Analysis of Mercury: Nicolas Bloom, Frontier Geosciences

Tuesday, 7/9/96

Mercury in the Environment: Processes

8:30-9:10 The Formation and Destruction of Methylmercury by Bacterial Processes Ron Oremland, USGS
9:10-9:40 Accumulation of Mercury in Sediment: Ed Swain, MPCA
9:40-10:00 Global Mercury Cycling and the Historical Record: Don Porcella, EPRI
10:00-10:30 Processes at the Sediment/Water Interface: Dave Krabbenhoft, USGS
10:30-10:45 BREAK
10:30-11:00 Interactions of Dissolved Organic Carbon and Mercury: George Aiken, USGS

Mercury in the Environment: Case Studies

11:00-11:20 Effects of Environmental Variations in Closed-Basin Lakes
on Mercury Chronologies:
Bob Lent, USGS
11:20-11:40 Point-source versus atmospheric mercury pollution in the Sudbury River: a model for New England mercury investigations: John Colman, USGS
11:40-12:00 Open
12:00-1:00 LUNCH
1:00-1:20 Mercury Cycling in the Florida Everglades: Dave Krabbenhoft, USGS
1:20-1:40 Cycling and Speciation of Mercury in the Periphyton of the South Florida Ecosystem: Nancy Simon, USGS
1:40-2:00 Mercury in Fish and Fish-Eating Birds in Maine: Terry Haines, NBS
2:00-2:20 Mercury in Walleye from the Upper Columbia River, Washington
2:20-2:40 Transport of Mercury in Sulphur Creek, CA: Jim Rytuba, USGS
2:40-3:00 Investigation of Mercury in Ground Water in an Unconfined Aquifer, Coastal Plain, New Jersey: Barringer and Szabo, USGS
3:00-3:30 BREAK
3:30-3:50 Open
3:50-4:10 Mercury contamination in the Carson River Basin, Nevada: Ray Hoffman, USGS
4:10-4:30 Mercury in the Terrestrial Environment, Kuskokwim Mountains Region, Southwest Alaska: Elizabeth Bailey, USGS

Wednesday, 7/10/96

8:30-12:00 Data and Knowledge Gaps (moderated open forum discussion)
  • Synthesis of Presentations
  • Open Forum Discussions on Information Gaps
  • Data syntheses
  • Source Characterization
  • Atmospheric Deposition
  • Human Health Impacts
  • Aquatic and Terrestrial Ecology
  • Geochemical Process Studies
  • Sampling and Analytical Needs
12:00-1:00 LUNCH
1:00-5:00 How Can the Gaps Best be Filled (moderated open forum discussion)
  • Sampling and Analytical Developments
  • Small-Scale, Process-Oriented Studies
  • Regional/National Studies
  • Existing Geochemical Data
  • Pertinent GIS Coverages
  • Sources
  • Deposition Patterns
  • Bioaccumulation Patterns

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