subject to improvement (i.e., reduction) to meet the glidepath for regional haze. Average the 5

yearly mean deciview values reflecting mean visibility on the days with best visibility.

Step 3. Estimate relative response factors (RRF) for each component of PM2.5 and

for CM.

This should be done by using emissions during the base period in air quality model

simulations performed for a large number of days78. Air quality corresponding with future

 

77Pre-calculated and ranked extinction and deciview calculations for all Class I areas for

the base period 2000-2004 (using both the “old” and “new” IMPROVE algorithms) are available

on the VIEWS website at http://vista.cira.colostate.edu/views/. This data can be used to satisfy

steps 1 and 2.

78How many and which days to simulate is discussed in Section 6.3 and in Section 14.1.

 

n701 - n702 - n703 - n704 - n705 - n706 - n707 - n707 - n709 - n710 - n711 - n712 - n713 - n714 - n715 - n716 - n717 - n718 - n719 - n720 - n721 - n722 - n723 - n724 - n725 - n726 - n727 - n728 - n729 - n730 - n731 - n732 - n733 - n734 - n735 - n736 - n737 - n738 - n739 - n740 - n741 - n742 - n743 - n744 - n745 - n746 - n747 - n748 - n749 - n750

 

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