AMBIENT AIR QUALITY MONITORING 



Responsible Agency: State of Montana 



Air Quality Bureau 



Sampling Frequency 



Sulfur Dioxide 

 Total Suspended 



Sulfation Rate 



EPA Equivalent Method EQSA-0276-009 



EPA reference Method CFR Title 40 Part 50, Appendix B 

 (State of Montana QA Manual Section 1.1.10 and 1.2.10) 

 24-hour sample once/6 days, corresponding to the National 

 Air Pollution Surveillance sampling schedule. 



Methods of Air Sampling and Analysis, 2nd Edition, 

 Tentative Method of Analysis of the Sulfation Rate of 

 the Atmosphere (Lead Dioxide Plate Method - Turbidimetric 

 Analysis), p. 691. 



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