No. on Map 

 1 



AMBIENT AIR QUALITY MONITORING 



Responsible Agency: State of Montana 

 Air Quality Bureau 



Location 



International 

 Boundary 



Parameters 



Sulfur Dioxide, Total 

 Suspended Particles, 

 Visibility Wind, 

 Speed and Direction 



Sampling Frequency 

 and Reporting 



Hourly averages 

 Summary statistics 

 (24-hour for TSP) 



Hanrahan 



Ft. Peck 

 Reservation 



Scobey 



Sulfur Dioxide, Total 

 Suspended Particles 



Sulfur Dioxide Total 

 Suspended Particles 



Total Suspended 

 Particles 



Hourly 



averages Summary 

 statistics 

 (24-hour for TSP) 



Hourly averages 

 Summary statistics 

 (24-hour for TSP) 



24-hour average 

 for TSP 



METHODS 



Sulfur Dioxide 

 Total Suspended 



Visibility • 



EPA Equivalent Mehtod 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 



State of Montana QA Manual Section 1.1.7 and 

 1.2.7 (Nephelometer) - continuous 



32 - 



