,,ii  #aafth ,,congress  #ast ,session  
,s4 #baje  ,,in ,,the ,,senate ,,of     
,,the ,,united ,,states  ,july #aa1     
#bjai,mr4 ,paul introduced the following
 bill2 which was read twice and referred
 to the ,committee on ,environment and  
,public ,works  ,a ,,bill  ,to amend the
 ,clean ,air ,act to clarify when a     
physical change in1 or change in the    
method of operation of1 a stationary    
source constitutes a modification1 and  
for other purposes4  #a4 ,clarification 
of definition of modification ,section  
#aaa7;a77#d7 of the ,clean ,air ,act    
7#db ,u4,s4,c4 #gdaa7;a77#d77 is        
amended-- 7#a7 by striking 7#d7 ,the    
term modification means and inserting   
the following3  7#d7 ,modification  7,a7
 ,in general ,the term modification     
means  2 and  7#b7 by adding at the end 
the following3  7,b7 ,associated        
definition ,for purposes of subparagraph
 7,a71 a physical change in1 or change  
in the method of operation of1 a        
stationary source shall be considered to

 increase the amount of any air         
pollutant emitted by the stationary     
source only if the maximum achievable   
hourly emissions rate of the stationary 
source after the change will be higher  
than--  7i7 the maximum achievable      
hourly emissions rate of the stationary 
source as the stationary source was     
originally designed2 and  7ii7 the      
maximum hourly emissions rate of the    
stationary source that was actually     
achieved during the #aj-year period     
preceding the change4  4