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WRAP RMC BART Modeling Update

This conference presentation outlines the BART modeling updates and state requests for assistance in AK, AZ, NM, NV, SD, UT. Details the modeling protocol revisions, database availability, and results summary. Provides examples from New Mexico and evaluation strategies. Updates on BART completion status for various states.

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WRAP RMC BART Modeling Update

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  1. Ralph Morris Yiqin Jia ENVIRON International Corporation Zion Wang University if California at Riverside Technical Analysis Forum Las Vegas, Nevada February 6-7, 200 WRAP RMC BART Modeling Update

  2. 7 WRAP States Requested RMC BART Modeling Assistance AK, AZ, NM, NV, SD and UT requested CALPUFF modeling assistance MT originally just requested CALMM (MM5) data Set up Webpage where Data and Information can be obtained http://pah.cert.ucr.edu/aqm/308/bart.shtml WRAP RMC Modeling Protocol Numerous revisions starting February 2006 Final version dated August 15, 2006 http://pah.cert.ucr.edu/aqm/308/bart/WRAP_RMC_BART_Protocol_Aug15_2006.pdf WRAP RMC BART Modeling

  3. Summary of State identified BART eligible sources CALMET/CALPUFF modeling databases Currently available for AZ, NM, NV, SD and UT Soon for AK and MT Numerous requests for databases Eventually summary of results Only NM currently available RMC BART Webpage

  4. CALMET/CALPUFF 2001, 2002, 2003 modeling years w/ 36 km MM5 data 2002 only w 15 km MM5 for Alaska CALPUFF Version 6.0 Surface meteorological observations No upper-air observation (in MM5 data) Use State provided emissions (max 24-hr actuals) Provide deciview impacts to States Annual Average Natural Conditions Best 20% Natural Conditions mentioned in Protocol dropped Initially provide Max, 99th and 98th percentile dv impacts Provide for all downwind distances (10 km – 1,000+ km) States determine whether subject-to-BART Most Sates limit results to < 300 km RMC BART Modeling Approach

  5. New Mexico Example 11 Potential BART-eligible Sources > 30 Class I areas from 40 km to > 1,000 km downwind Highest impacts occur at closer Class I areas so limit presentation to within 300 km Present just 98th percentile dv impacts

  6. 11 NM Potential BART-eligible sources Several Sulfur Recovery Units (SRU)

  7. Example CALPUFF Results for Giant Ciniza 98th Percentile 0.06 – 0.11 < 0.5 dv

  8. Example CALPUFF Results for PNM San Juan Unit#1 98th Percentile 7.5 – 9.5 > 0.5 dv

  9. Because NM is a Section 309 State, BART for SO2 is already addressed. So for BART sources with > 0.5 dv impacts from all emissions: Evaluate for SO4 only (SO2) Evaluate for NO3 only (NOx) Evaluate for NO3+PM only (NOx+PM) NO3 (NOx) and NO3+PM alone assessments did not change findings for sources > 0.5 dv New Mexico BART

  10. NM: Subject-to-BART completed and posted UT: Subject-to-BART and control strategy evaluation completed SD, NV and AK: Subject-to-BART completed AZ: For some sources, Subject-to-BART completed. Just received corrected source coordinates for several sources MT: Subject-to-BART completed for some sources, awaiting emissions information for final two sources WRAP RMC BART Modeling Status

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