Agenda 


• Introductions 

• Objectives 

• RP Goals in Montana 

• BART for Colstrip Units 1 &2 

• Next Steps 

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····1···::;.. · November 1, 2011 pp .....

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Objectives 


• 	Convey Colstrip Owners' View 

- Recent Colstrip reductions are significant for long term 

strategy in first RP implementation period (through 2018) 

- Other near-term air pollution control programs achieve further 

visibility improvements 


- Units 1 & 2 


• 	 Reach Common Understandings 


- EPA's Obligations and Analysis 


- Reasoned, long-term plan to achieve RP goals 


- Colstrip's portion of Montana Regional Haze FIP 


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....:·· ···~·:..­ November 1 , 2011 

pp .~~~: ", 
Help IParameter Group Selection of Days RRF Calculation Method 

Mass Best 20% IMPROVE S ecific Da s EPA)

Quarterly Weighted 

Monthly Weighted 

Light Extinction Worst 20% IMPROVE

Annual Data 


Particle Extinction 


Parameter 

. 2009 


Deciview 
 2008 


Sulfate Extinction 
 2007 


Nitrate Extinction 
 2006 


Particulate Organic Carbon Extinction 
 2005 

Elemental Carbon Extinction 2004 

Soil Extinction 2003 

Coarse Mass Extinction 2002 

SeaSalt Extinction 2001 

2000 

Visibility modeling results from the Plan02d regional scenario for 9 WRAP region IMPROVE regional haze tracking sites, and the 15 W 

areas represented by these 9 sites, as well as 1 WRAP region Class II area site, and 3 non-WRAP region sites were incorrectly extra( 

adjacent to the grid cell containing the IMPROVE samplers. This was corrected in a revised version of the model scenario results, Pia 

2011. The emissions data for Plan02d were correct and have not been revised. Open this document for additional details. 

16.0 

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UL Bend NWRW, IVIT Class I area 

Projected 2018 PRP18b Visibility Conditions on Worst 20% Visibility Days from Plan02d 

EPA Specific Days 

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Figure 1. 

- Hide Data 

Site Year dvlBase dvl Inc dvl NCII dvl Base2005 Deciview Iprp18b 

ULBE1 2000 15.14 

ULBE1 2001 15.14 

ULBE1 2002 15. 14 

ULBE1 2003 15.14 

ULBE1 2004 15.14 15.14 

ULBE1 2005 15.02 14.86 

ULBE1 2006 14.90 14.86 

ULBE1 2007 14.79 14.86 

ULBE1 2008 14.67 14.86 

ULBE1 2009 14.55 14.86 

ULBE1 2013 14.09 

ULBE1 2018 13.51 14.85 

ULBE1 2023 12.93 

ULBE1 2028 12.34 

ULBE1 2033 11.76 

ULBE1 2038 11.18 

ULBE1 2043 10.60 

ULBE1 2048 10.02 
Regional Contributions to Sulfate on Worst 20% Visibility Oays 

UL Bend NWRW, MT Class I area 

1_ j\f\JRAP 

" Pacific Offshore 

D CENRAP 

; Eastern U.S. 

Canada 

n Mexico 

o Outside Domain 

2002 2018 

Sulfate 1.2 ug/rn3 Sulfate 1 .2 ug/rn3 

--- - - - _ ._-- ----- - - ­
WRAP Source RegionfType Contributions to Sulfate on Worst 20% Visibility Days 

UL Bend NVVRVV, MT Class I area 

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Outside Domain 

• Point 

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• 	 Anthro. Fires 

Nat. Fires 8 Bio. 
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Regional Contributions to Nitrate on Worst 20% Visibility Days 

UL Bend NWRW, MT Class I area 

'V\rRAP 

• Pacific Offshore 

n CENRAP 

Eastern U.S. 

Canada 

o Mexico 

o Outside Domain 

2002 

Nitrate 1 .2 ug/m3 

2018 

Nitrate 1.1 ug/m3 
WRAP Source Regionrrype Contributions to Nitrate on Worst 20% Visibility Days 

UL Bend NWRW, MT Class I a_r_ea~__ ____ 

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Nat. Fires & BiD. 

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