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Transport Contributions of Out-of-State Sources to East Texas Ozone
| Project Period: | 07/02/2004 - 03/30/2005 |
| Total Budget: | $160,000 |
| Sub-Contractors: | ENVIRON - Greg Yarwood ($160,000)
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Transport of pollution from out-of-state sources may have a significant impact on ozone levels in East Texas, thus making it difficult to achieve compliance with the new 8-hour federal ozone standard based on local control strategies alone. This project will examine the contribution of nearby states to ground-level ozone in the Dallas-Fort Worth (DFW) non-attainment area and the near non-attainment areas of Northeast Texas. CAMx model runs for these three episodes will be analyzed using the Anthropogenic Precursor Culpability Assessment (APCA) tool. The APCA analysis will be similar to that employed in TERC Project H27, except that out-of-state sources throughout the regional modeling domains will be examined in greater detail, and the analysis will look at contributions to regional background 8-hour ozone in additional to 8-hour ozone above 85 ppb.
Phase 2 will expand the sensitivity and uncertainty analysis performed in Phase 1, and will consist of four parts:
A. Examinaton of the sensitivity of the standard EPA performance statistics for the August 1999 DFW SIP episode to prescribed changes in modeling assumptions. The evaluation will also examine the vertical meteorology performance using available data from 6 profilers and/or sondes in and around DFW, and intermediated species (especially carbon monoxide), observed at surface monitors in the DFW area.
B. Process analysis to examine the impacts of the prescribed changes in modeling assumptions on the relative importance of key dynamical and photochemical processes that determine surface ozone in the DFW urban core, including ozone titration.
C. Examination of the sensitivity of the APCA results of Phase 1 to the prescribed changes in modeling assumptions.
D. Examination of the impact of regional controls associated with CAIR and other rules on local attainment requirements in DFW, as well as the sensitivity of this impact to the prescribed changes in modeling assumptions.
Related Categories
Below is a list of categories that this project belongs to.
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| Page Updated/Reviewed: 05/24/2006 11:53 AM |
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© 2005 - 2009 Texas Environmental Research Consortium
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