Summary of the WRAP’s Emission Inventory for Dust

1. Summary of the WRAP’s Emission Inventory for Dust Alice Edwards, Alaska Dept. of Environmental Conservation WRAP Fire, Carbon, and Dust Workshop Sacramento, CA May 23, 2006

3. Emission Inventory Sources • WRAP stationary and area sources • Eastern Research Group • Enhanced and projected the 2002 NEI with QA and state input/review • http://www.wrapair.org/forums/ssjf/documents/eictts/index.html • CA emissions obtained separately from ARB

4. Emission Inventory Sources • WRAP paved and unpaved road dust • ENVIRON • Surveyed state/local agencies for paved and unpaved VMT data updates • Applied EPA emission factor methodology • Draft report available soon on WRAP website • CA emissions obtained separately

5. Emission Inventory Sources • Windblown dust • ENVIRON • Windblown dust model applied to entire modeling domain • Based on 2002 wind and precipitation data, most readily available land use / land cover data, crop harvesting data, and soil group emission factors • Phase II final report being posted at: • http://www.wrapair.org/forums/dejf/docs.html

6. Emission Inventory Sources • Emissions outside WRAP region (non-windblown) • Mexico • http://www.wrapair.org/forums/ef/docs.html • Canada, other U.S. states, non-mobile ocean • Obtained by WRAP RMC through an inter-RPO process • Boundary conditions • Obtained by WRAP RMC from Harvard Univ., which used the global GEOS-CHEM model

7. 2000-04 Baseline

8. Area Paved & Unpaved Roads 2000-04 Baseline Windblown Total

9. 2018 Base Case

10. Area Paved & Unpaved Roads 2018 Base Case Total Windblown

11. Difference in dust emissions(base18b minus plan02b)

12. Area Paved & Unpaved Roads Difference in dust emissions(base18b minus plan02b) Windblown Total