Table 7. Summary of Air Quality Monitoring Results during 1984 in Montana. 



Sulfur Dioxide (pphm) 



Site Highest 1-hr. Highest 3-hr. Highest 24-hr . Annual Average 



Border (6)1 

 Hanrahan (6)^ 



8.5 

 4.8 



4.4 

 3.2 



1.2 

 1.0 



0.1 

 0.2 



Sulfation Rate (mg/100 cm^/day) 



NOTES: 



1 Parentheses denote the number of sample months. 



^ The monthly sulfur dioxide averages measured by the continuous sulfur 



dioxide analyzers are presented below the corresponding sulfation rate 



data for comparison purposes. 



35 - 



