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Table 9 

 Summary of 1986 Montana Air Quality Monitoring Results 



Sulphur Dioxide (pphm) 



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



Marlenee 7.5 4.2 0.6 0.0* 



Ranch 



Sulfation Rate (mg/100 cm^/day) 



Site Jan. Feb. Mar. Apr. May June July Aug. Sep. Oct. Nov. Dec. 



International — — — — — — — — — — — — 



Boundary 



Richardson — ~ ~ ~ 0.00 — 



Hanrahan ~ ~ ~ ~ ~ 0.00 ~ 



Microwave — — — 0.01 — — — — — — 



Tower 



Flaxville 0.02 ~ 



TV Tower ~ ~ 0.01 ~ 



Hill 



Scobey ~ 0.02 ~ 



Downtown 



Four Buttes — — — .00 — 



Total Suspended Particulate (wg/m^) 



Geometric Arithmetic 

 Site Highest 24-hr 2nd Hightest 24-hr Mean Mean 



Marlenee 140 45 18.7 28.9 



Ranch 



^Annual average based on four months of data. 



