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(Salt Lake City, KSL News) -- Officials may have an idea of what's causing that bad smell near the airport.
The actual source of the vapors is still unknown, but the Utah Department of Environmental Quality says the vapors are consistent with a petroleum-based product or fuel.
Natural gas has been ruled out.
DEQ officials say the concentration of the vapors is well below protective health standards and is not an immediate health threat, though the smell has made some people sick.
