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Denver 2004 TGP1 PM2.5 Emissions Inventory Workshop Denver, CO March 2004 Thompson G. Pace USEPA Emissions Estimation for Agricultural Burning.

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Presentation on theme: "Denver 2004 TGP1 PM2.5 Emissions Inventory Workshop Denver, CO March 2004 Thompson G. Pace USEPA Emissions Estimation for Agricultural Burning."— Presentation transcript:

1 Denver 2004 TGP1 PM2.5 Emissions Inventory Workshop Denver, CO March 2004 Thompson G. Pace USEPA Emissions Estimation for Agricultural Burning

2 Denver 2004 TGP 2 Agricultural Burning

3 Denver 2004 TGP 3 AGRICULTURAL BURNING Overview SCC 2801500000 PM10-PRI and PM25-PRI Both condensibles and filterables NEI contains ONLY State-submitted estimates  10 States for 1999 - AL, CA, DE, GA, ID, KS, ME, OR, TX, UT General Approach  Activity (acres of crop burned)  Loading factor (tons of biomass or vegetation per acre burned)  Emission factor (pounds per ton) Case Study

4 Denver 2004 TGP 4 CASE STUDY Wheat Stubble Burning Method - Develop inventory using county- specific data when available  Activity Acres of wheat burned by month obtained from burn permits issued by county fire department Fuel loading for wheat stubble from county agricultural extension office

5 Denver 2004 TGP 5 CASE STUDY Wheat Stubble Burning (Cont’d) Emission Factors  PM10: 8.82 pounds per ton of wheat stubble burned  PM2.5: 8.34 pounds per ton of wheat stubble burned Reference: Jenkins, B.M. et al., Atmospheric Pollutant Emission Factors from Open Burning of Agricultural and Forest Biomass by Wind Tunnel Simulations, Volume 2, Results, Cereal Crop Residues, California Air Resources Board Project No. A932-126. Resolution  Spatial – county  Temporal - monthly

6 Denver 2004 TGP 6 CASE STUDY Wheat Stubble Burning (Cont’d) Sample Calculation  June PM2.5-PRI Emissions = Acres Burned in June * Loading Factor * Emission Factor = 1,950 acres/month * 1 ton/acre * 8.34 lbs/ton = 16,263 pounds/month = 8.13 tons/month Annual PM2.5-PRI Emissions = ∑ Monthly Emissions

7 Denver 2004 TGP 7 AGRICULTURAL BURNING Improvements Preferable to inventory larger fires (> 100 acres) as events with a start and stop date and time; lump smaller fires into monthly acreages Requires coordination with burners and permit authorities Start building a system and relationships with the burners/ permitting authorities to enable such an inventory in the future

8 Denver 2004 TGP 8 AGRICULTURAL BURNING Improvements (Cont’d)  Obtain local acres of crops burned data from: Burn permits Survey of county agricultural extension offices  Verify that burns actually occurred  Obtain fuel loading data Local data preferred from county agricultural extension offices, local Natural Resources Conservation Service Center National defaults available from Chapter 2.5 in AP-42

9 Denver 2004 TGP 9 Questions?

10 Denver 2004 TGP 10 Questions?

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