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Reconciliation of Area and Point Sources in Emission Inventories: Strategies and Methodologies

This workshop focuses on the reconciliation of area and point sources within emission inventories, emphasizing the definitions, significance of updates, and methodologies involved. It highlights the importance of accurate emissions reporting and the contribution of area sources to the overall inventory. The workshop presents step-by-step reconciliation procedures to avoid double counting and enhance inventory quality. Key discussions include the significance of area source updates, exploring various source categories, and documenting emission estimation methods, to improve air quality management strategies.

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Reconciliation of Area and Point Sources in Emission Inventories: Strategies and Methodologies

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  1. Area and Point Sources Reconciliation Vijay Bhargava Emission Inventory Workshop Air Resources Board March 13, 2006

  2. Area Sources • Definition • Importance of updates • Significance of Methodologies • Reconciliation With Point Sources Emission Inventory Workshop Spring 2006

  3. Definition of Area Sources • Emissions not reported in the point source inventory Emission Inventory Workshop Spring 2006

  4. Area Source Categories • Stationary Sources\Aggregated Point Sources • Areawide Sources • Mobile Sources • Natural Sources Emission Inventory Workshop Spring 2006

  5. Importance of Area Source Updates • Reconciliation with point sources • Planning inventories • Toxic area source inventories • Area source contribution to the total inventory Emission Inventory Workshop Spring 2006

  6. Change in ROG Emissions by Source Category 1999-2010 1999 2010

  7. Significance of Methodologies • Document emission estimation method • Form a source pool for others to use • Clearinghouse Emission Inventory Workshop Spring 2006

  8. Unreconcile Emissions Emission Inventory Workshop Spring 2006

  9. Reconciliation • Purpose of reconciliation • To avoid double counting of emissions • Procedure for reconciliation • Step 1: • sum all point source emissions for the same area source EIC Emission Inventory Workshop Spring 2006

  10. Reconciliation • Step 2: • Subtract point source sum from the unreconciled (total) emissions for the same area source EIC • Step 3: • Back calculate the reconcile process rate by dividing the emissions by the emission factor • Choose the pollutant with the highest emissions Emission Inventory Workshop Spring 2006

  11. Reference Introduction to Area Source Emission Inventory Development Prepared by: Eastern Research Group, Inc Prepared for: Area Source Committee Emission Inventory Improvement Program January 2001 http://www.epa.gov/ttn/chief/eiip/techreport/volume03/index.html Emission Inventory Workshop Spring 2006

  12. Reference Areawide Source Methodologies California Air Resources Boardhttp://www.arb.ca.gov/ei/areasrc/areameth.htm Emission Inventory Workshop Spring 2006

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