1. CAMx-PSAT Source Apportionment Modeling Results
Stationary Sources Joint Forum
Salt Lake City, UT
August 17, 2006

2. Source Apportionment Technique
CAMx air quality model with PM Source Apportionment Technology (PSAT)
PSAT being completed for 2 cases:
Plan 2002c
Base 2018b
Tracks sources of sulfate and nitrate
Tracking organic carbon too computationally intensive. However, data is available that delineates primary OC, from biogenic SOA, and anthropogenic SOA.

3. 18 Source Regions on a 36 km Grid

4. Eight Source Categories
ICON
Initial conditions
BCON
Boundary conditions PT
Point sources MV
Mobile sources
ANF
WRAP anthropogenic fires
Natural
WRAP natural fires and biogenics
NWF
Elevated fires in other RPOs AR
All other sources (non-elevated fires in other RPOs, area sources, offshore, oil & gas area sources, etc.)
Examples of PSAT “sources”:
MV_CO = mobile sources in Colorado
PT_CE = point sorces in CENRAP
BCON = transport from modeling domain boundaries (derived from GEOS-CHEM)

5. Status of Modeling Plan 2002c just completed
Base 2018b to be completed by end of August
Several months currently completed
Results currently available for daily and monthly averages
Results will be provided for 20% best and worst visibility days at each Class I area

16. Alternative Formats for Presenting Results
All examples are for July SO4
All examples pair 2002 and 2018 on same chart
Format 1: Top 10 sources (TONT, GRCA, ROMO, BADL)
Format 2: By source region (BADL)
Format 3: By source category (BADL)
Format 4: By source “controlability” (BADL)

17. Current Format

18. Alternate Format 1 – Top 10 Sources

19. Alternate Format 1 – Top 10 Sources

20. Alternate Format 1 – Top 10 Sources

21. Alternate Format 1 – Top 10 Sources

22. Alternate Format 2 – By Region

23. Alternate Format 3 – By Category

24. Alternate Format 4 – By “Controlability”

25. Slight Decrease in WRAP SO2

26. Slight Decrease Due To Large Mobile Source Reduction + Modest Point/Area Source Increase

27. Why Do Area Sources Increase?

28. Why Do Point Sources Increase?

30. For further background information and data on PSAT: