1. 1999 Scott County Emission Inventory Iowa Department of Natural Resources Brian Hutchins

2. p. 2 Presentation Overview Sources included in the emission inventory Methods Results – –overall – –specific pollutants Conclusions

3. p. 3 Sources included in the emission inventory Point Sources – –manufacturing food & kindred products lumber & wood products chemicals rubber & plastic products stone, clay, glass, & concrete products fabricated metal products industrial & commercial equipment – –other services

4. p. 4 Sources included in the emission inventory Area Source Examples – –gasoline marketing – –dry cleaning – –commercial/consumer solvent use – –architectural surface coating – –agricultural pesticide use – –open burning – –residential wood combustion

5. p. 5 Sources included in the emission inventory Mobile Sources – –on-road light and heavy duty gasoline and diesel powered vehicles and trucks motorcycles – –nonroad agricultural, commercial, construction, mining, industrial, lawn, garden, and logging equipment; aircraft, barges, and locomotives

6. p. 6 Methods for data collection and emission estimation Point Sources – –emission inventory questionnaire Area Sources – –apportion national or state activity totals to the county level – –survey local activity levels – –use per capita emission factors – –use emissions-per-employee factors

7. p. 7 Methods for data collection and emission estimation Mobile Sources – –Computer models developed by U.S. Environmental Protection Agency

8. p. 8 Overall Results 1999 total Criteria Pollutant emissions from all sources in Scott County (tons per year) PM 10 2,356VOC 9,013 SO 2 8,016CO 36,732 NO x 11,093Pb 0.12

9. p. 9 Overall Results 1999 total HAP emissions from all sources in Scott County (tons per year) 1,563 Of the 188 HAPs, 67 were found to have emissions

10. p. 10 Figure 3-1. 1999 Estimated VOC Emissions for Point, Area, and Mobile Sources in Scott County (9,013 Tons)

11. p. 11 Figure 3-2. 1999 Estimated VOC Emissions from Mobile Sources in Scott County, Iowa (3,955 Tons)

12. p. 12 Figure 3-3. 1999 Estimated VOC Emissions by Area Source Category in Scott County (3,561 Tons)

13. p. 13 Figure 3-4. 1999 Estimated NOx emissions for Point, Area, and Mobile Sources in Scott County, Iowa (11,093 Tons)

14. p. 14 Figure 3-5. 1999 Estimated NOx Emissions from Mobile Sources in Scott County, Iowa (6,386 Tons)

15. p. 15 Figure 3-6. 1999 Estimated NOx Emissions from Point Sources in Scott County, Iowa (3,935 Tons)

16. p. 16 Conclusions VOC – –mobile and area sources NOx – –mobile and point sources Inventory Needs