Barkley C Sive¹, Melissa Puchalski², Timothy Sharac², Greg Beachley², Taylor Macy², David Schmeltz², Huiting Mao³, Kevin Mishoe⁴, Chris Rogers⁴, Marcus Stewart⁴, Kemp Howell⁴, Mike Slate⁵, Jessica Ward⁵, Joe Adlhoch⁵ and Ryan McCammon⁶, (1)National Park Service Lakewood, Air Resources Division, Lakewood, CO, United States, (2)Environmental Protection Agency Washington DC, Washington, DC, United States, (3)SUNY-ESF, Chemistry, Syracuse, NY, United States, (4)Wood Environment & Infrastructure Solutions, Inc., Newberry, FL, United States, (5)Air Resource Specialists, Inc., Fort Collins, CO, United States, (6)BLM-Wyoming State Office, Cheyenne, WY, United States