AMBIENT AIR QUALITY MONITORING 



Responsible Agency: State of Montana 



Air Quality Bureau 



Sulfur Dioxide 



Total Suspended 

 Particulates 



Sulfation Rate 



Sampling Frequency 

 and Reporting 



Hourly averages 

 24-hour averages 

 Hourly averages 

 Hourly averages 

 Hourly averages 

 Monthly averages 



Monthly averages 



Monthly averages 

 Monthly averages 

 Monthly averages 

 Monthly averages 

 Monthly averages 



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 



Methods of Air Sampling and Analysis, 2nd Edition, 

 'Tentative Method of Analysis of the Sulfation Rate of 

 the Atmosphere (Lead Dioxide Plate Method - Turbldlmetrlc 

 Analysis)," p. 691. 



♦Continuous monitoring site (#1) will operate through the end of June 1987. 

 Sulfation plate network may be reduced In size to 3-4 sites. 



- 34 - 



