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Occupational Exposure To Snowmobile Emission At Yellowstone National Park, Wendy Campbell, Ryan Morris, Dale Stephenson, Terry Spear

Dale J. Stephenson

In recent years, regulations regarding snowmobile recreation in Yellowstone National Park have become more restrictive. New regulations limit the number of snowmobiles entering the park, restrict the engine type, and require that all riders must utilize a licensed guide. Given these regulations, it is hypothesized that occupational exposures to the combustion products from snowmobile exhaust have decreased. This research project performed occupational exposure monitoring of National Park Service Employees while working at the West Entrance to Yellowstone National Park during the 2004-2005 winter season. Products of snowmobile exhaust including carbon monoxide, nitrous oxides, volatile organic compounds, fine particulates, and noise …