REGIONAL HAZE AND VISIBILITY IN WYOMING

• Jurisdiction: United States

Air Quality Challenges Facing the Natural Resources Industry in the Western United States
(Nov 2007)
CHAPTER 8E
REGIONAL HAZE AND VISIBILITY IN WYOMING
David Finley
Air Quality Division
Wyoming Department of Environmental Quality
Cheyenne, Wyoming

309 S0₂ Milestone Changes

• Originally included 9 western states and 4 Indian tribes.

-- Now includes only 4 states (Arizona, New Mexico, Utah and Wyoming).

• Reduction in tribal set-aside.

• Reduction in new source set-aside.

• Change in copper smelter set-aside.

• Better handle on current and projected emissions.

[Page 8E-2]

SO₂ Trends in Wyoming

[Page 8E-3]

Company Name	Facility	Unit
PacifiCorp	Dave Johnston	Units 3-4
PacifiCorp	Jim

...