1. Nate Herbst Southern Ute Indian Tribe
Siting Activity
Nate Herbst
Southern Ute Indian Tribe

2. Siting Criteria Siting criteria ensure correct analysis location
Data must be representative of local exposure
Different ways of determining (ex. PSDs)
Unrestricted airflow 270o around the inlet; 180o if inlet is on side of building
Inlet must be 3-15 meters above ground
Inlet must be at least 1 meter from supporting structure
List courtesy of Stan Belone Salt River Pima-Maricopa Indian Community

3. Siting Criteria (cont.)
Inlet must be separated from obstructions by a distance 2 times that height obstruction protrudes above inlet
AQ site must be
10 meters from roadways with ≤ 10,000 vehicles/day
20 meters from roadways with 10-20,000 vehicles/day
AQ site must be 20 meters from drip line of trees
10 meters if trees act as an obstruction

4. Monitoring Objectives
Determine monitoring objectives
Determine boundaries
Determine representative area
Determine where site will be
Then go through these siting principals

5. Airflow
Must be unrestricted airflow 270o around inlet (180o for inlets on side of building)
Unrestricted airflow 270o around inlet?

6. Height off Ground Inlet must be 3-15 meters above ground

7. Height off Structure Inlet must be 1 meter off supporting structure
1 meter above structure?

8. Distance from Obstructions
Inlet must be separated from obstruction by twice height that obstruction protrudes above inlet
2X difference in height?

9. Distance from Roadways
Must be10 meters from roads with up to 10,000 vehicles/day
Must be 20 meters from roads with between 10 and 20,000 vehicles/day
10 meters from highway?

10. Distance from Trees Inlet must be 20 meters from drip-line of trees

11. Where should it go? Where should ozone analyzer inlet go?
Why or why not? x x C B x A

12. Where should it go? (cont.)
Where should ozone analyzer inlet go?
Why or why not? A x C x x B

13. Where should it go? (cont.)
This road has ~ 6,000 vehicles/day
Is this sampler sited correctly?
Why or why not?

14. Summary Siting criteria must be met before monitoring
Don’t just throw up monitors in random places
Siting criteria must also meet monitoring objectives