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 being made, but additional work is required in the development of 

 computer modeling of the long distance transport of air pollution. 



Explain the improvements that the Department has made since our 1990 

 hearings in quantifying air quality- related values, including the 

 condition of our resource inventories. 



Initially, we focused our air resource management program on the 

 larger PSD permit applications with obvious potential threats to Class 

 I areas. We developed a screening procedure in cooperation with EPA 

 which focuses our efforts on those Prevention of Significant 

 Deterioration (PSD) applications most likely to impact Class I areas. 

 The Forest Service has conducted ten regional Air Quality Related 

 Value (AQRV) screening workshops for agency specialists and managers. 

 Reports documenting the proceedings and conclusions from these 

 workshops have been published for three of these workshops and four 

 more should be published by the end of the year. During each workshop 

 available data about the condition of the resources potentially and 

 actually affected were evaluated and screening values for each AQRV 

 were establshed. These AQRV's allow us to evaluate potential impacts 

 to the resources we manage from new source permit applicants so that 

 we focus our review efforts on the most critical pollution threats. 

 Since 1990, the Forest Service has developed specific screening values 

 for all 88 Class I areas. 



Should regulatory approaches to eastern and western lands be the 

 same? If not, how should they be different? 



Meteorology and air pollution issues as well as the topography are 

 radically different between the eastern and western United States, 



