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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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