1. 1 Open Discussion Technical Challenges for Statewide Application Tony Servin, P.E. Modeling Support Section Planning and Technical Support Division May 6, 2003 Air Resources Board California Environmental Protection Agency EJVChallenges_050603.ppt

2. 2 Challenge Inventory Traditional areawide sources become point sources for microscale modeling Increase in spatial resolution needs are not always supported by inventory data Regional Modeling Integrated Results Risk Assessment Mapping and Visualization Microscale Modeling Emissions and Meteorology Statewide Application

3. 3 Challenge Meteorology Observations not available everywhere in the state for microscale plume models Regional Modeling Integrated Results Risk Assessment Mapping and Visualization Microscale Modeling Emissions and Meteorology Statewide Application

4. 4 Challenge Microscale Model Statewide application easier to implement by selecting only one microscale model Regional Modeling Integrated Results Risk Assessment Mapping and Visualization Microscale Modeling Emissions and Meteorology Statewide Application

5. 5 Challenge Microscale for Roadways Microscale modeling on annual average basis is not well established Regional Modeling Integrated Results Risk Assessment Mapping and Visualization Microscale Modeling Emissions and Meteorology Statewide Application

6. 6 Challenge Regional Modeling Resolution Increase resolution for community assessments Regional Modeling Integrated Results Risk Assessment Mapping and Visualization Microscale Modeling Emissions and Meteorology Statewide Application

7. 7 Challenge Integration of Results Double counting of microscale and regional modeling results Regional Modeling Integrated Results Risk Assessment Mapping and Visualization Microscale Modeling Emissions and Meteorology Statewide Application

8. 8 Challenge Risk Assessment and Mapping Cancer and Chronic inhalation risk estimates may be feasible Exploring ways to convey both averages and peaks Regional Modeling Integrated Results Risk Assessment Mapping and Visualization Microscale Modeling Emissions and Meteorology Statewide Application

9. 9 Next Steps

10. 10 Next Steps Microscale –Prepare Report for Barrio Logan –Barrio Logan model performance - tracer studies –Wilmington Protocol & Analysis Regional - Statewide –Prepare toxic inventory –Prepare meteorological files –Run air quality model Statewide Protocol Development –Currently under development –Draft Protocol will be available in June to Peer Review Group Continue Developing Statewide Tools

11. 11 Schedule December 2003 –Recommend plan for cumulative risk assessments at neighborhood scale for Statewide application –Replace risk maps (ASPEN) for Southern California Continue meetings (July 8, 2003) with working group Second peer review group