1. United States Department of Agriculture Forest Service Air Resource Management Program 1400 Independence Avenue SW Washington D.C. 20250 USA
2. Washington State University Pullman Washington 99164 USA
3. E&S Environmental Chemistry, Inc 2161 NW Fillmore Avenue Corvallis Oregon 97330 USA
4. Western Ecology Division National Health and Environmental Effects Research Laboratory U.S. Environmental Protection Agency Corvallis Oregon 97333 USA
5. U.S. Geological Survey 12201 Sunrise Valley Drive Reston Virginia 20192 USA