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Table 8 



Summary of Air Quality Monitoring Results During 1985 in Montana 



Highest 2nd Highest Arithmetic 

 24-hr 24-hr Mean 



1 Parentheses denote the number of sample months, 



2 The monthly sulphur dioxide averages (pphm) measured by the continuous 

 sulphur dioxide analyzers are presented below the corresponding 

 sulfation rate data for comparison purposes. 



