CMB8 - 9/13/11 Aerosol & Particulate Research Lab...

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Unformatted text preview: 9/13/11 Aerosol & Particulate Research Lab Chemical Mass Balance Model (CMB8.2) A receptor model for assessing source apportionment using ambient data and source profile data with appropriate uncertainty estimates. Version 8.2 available at EPA Support Center for Regulatory Air Models - http:// www.epa.gov/ttn/scram/receptor_cmb.htm Q: Whats the use of CMB? 9/13/11 11 Aerosol & Particulate Research Lab 9/13/11 Aerosol & Particulate Research Lab Where CMB can be used Complement rather than replace other modeling methods Explain observations already have been taken; does not predict the future Can be use to estimate the effects of emission reduction if source contributions are proportional to emissions Can be coupled with visibility model or aerosol equilibrium model to estimate the effects on secondary pollutants. Discrepancies between model results help identify and improve their weakness and apply uncertainty bounds that should be used when designing control strategies. 9/13/11 22 Aerosol & Particulate Research Lab 9/13/11 Aerosol & Particulate Research Lab Principles A solution to linear equations that express each receptor chemical concentration as a linear sum of products of source profile abundances and source contributions . Mass and chemical compositions of source emissions are conserved from the time of emission to the time the sample is taken. 9/13/11 33 Aerosol & Particulate Research Lab Q: What are the most common species data for CMB? 9/13/11 Aerosol & Particulate 8 1 2 3,4,5,12 6 7 9 10 11 13 14 PM10 emissions from permitted sources in Alachua County (tons) (ACQ,2002) 2000 Values 1. GRU Deerhaven 144.2 2. Florida Rock cement plant 34.35 3. Florida Power UF cogen. plant 3.19 1997 Values 4. VA Medical Center incinerator 0.2 5. UF Vet. School incinerator 0.2 6. GRU Kelly 1.9 7. Bear Archery 9.5 8. VE Whitehurst asphalt plant 4.9 9. White Construction asphalt plant 0.7 10. Hipp Construction asphalt plant 0.3 11. Driltech equipment manufacturing 0.211....
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This note was uploaded on 09/11/2011 for the course ENV 6146 taught by Professor Staff during the Spring '11 term at University of Florida.

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CMB8 - 9/13/11 Aerosol & Particulate Research Lab...

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