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<br />Nitrogen oxide in the presence of sunlight and oxygen reacts over a period of time to form a <br />secondary compound of nitrogen dioxide, ayellow/brown gas. <br />4. For comparison, an average [ruck emits approximately ahalf--pound of NOx per tank of gas, a <br />residential hot water boiler emits approximately a quarter pound of NOx per day and residential <br />furnace emits approximately a 1.5 pounds of NOx per day. <br />5. The blasting activities at Lorencito Coal Co. do emit a variety of air pollutants into the atmosphere <br />that could pose a health risk. However, based upon the location of the blasting relative to <br />populated azeas and the dispersion and dilution of emissions produced, by the time these pollutants <br />reach the general population, they are well below hazardous levels. <br />6. Additionally, there aze sources of NOx much closer to the Primero school that may pose more of <br />an adverse health impact e.g. vehicle emissions from the highway, heating equipment in the school <br />and adjacent homes, and vehicle traffic to and from school. <br />7. Overall, the nitrogen oxide emissions produced by the blasting activities at Lorencito Coal Co. <br />should not pose a specific health risk to the residents adjacent the mine property, <br />If you have any questions, please contact me. <br />Thank you, <br />~~~ <br />haul Carr <br />Environmental Protection Specialist <br />Colorado Department of Public Health and Environment <br />Air Pollution Control Division, Stationary Source Divisiai <br />Office (303) 692-3250 <br />Fax (303) 782-0278 <br />Mail APCD-SS-B1 <br />4300 Cherry Creek Drive South <br />Denver, CO 80246-1530 <br />Cc. <br />Robert Jorgenson <br />Ron Leef <br />