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.

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SO₂ Trends in Wyoming

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Company Name	Facility	Unit
PacifiCorp	Dave Johnston	Units 3-4
PacifiCorp	Jim Bridger	Units 1-4
PacifiCorp	Naughton	Units 1-3
PacifiCorp	Wyodak	Unit 1
General Chemical	2 Units
FMC Wyoming Corp.	Granger Soda Ash Plant	2 Units
FMC Corp.	Green River Plant	3 Units
Black Hills Power & Light	Simpson 1	Unit 1
P4 Production	Rock Springs Facility	1 Unit
Dyno Nobel	9 Units
Sinclair Oil Corp.	Sinclair Refinery	16 Units
Sinclair Refinery	Casper	1 Unit

Pink = Eligible and Subject to BART

Blue = BART-eligible, but not Subject

Worst Visibility Days (2000-2004)

http://www.coha.dri.edu/web/general/tools_PMFModeling.html

[Page 8E-4]

SO4 PSAT Results

2002 and 2018 Base Cases

NO3 PSAT Results

2002 and 2018 Base Cases

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