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1 <br />1 <br /> <br /> <br /> <br />1 <br />1 <br /> <br />1 <br /> <br />1 <br />1 <br />1 <br />1 <br />1 <br />LJ <br />1 <br /> <br /> <br />Mule Creek Gravel Pit~irottmental Assessment • Page 29 <br />Table 3.1. National Ambient Air Quality Standards <br />Pollutant Averaging Time Concentration <br />Carbon Monoxide ~ hour' 35 ppm (40 mg/mat <br /> 8 hour' 9 ppm 110 mg/mat <br />Fine Particulate Matter Annual arithmetic mean 15 uglma <br />(PMZ,sI 24 hour' 65 ug/ma <br />Respirable Particulate Annual arithmetic mean 50 ug/ma <br />Matter IPM,o) 24 hour' 150 ug/ma <br />' Concentration not to be exceeded more than one time per_year in averaging time. <br />Cazbon monoxide and particulate matter are two out of six principal pollutants, or criteria <br />pollutants. Areas which violate the NAAQS for one or more of the six criteria <br />pollutantsl aze classified by EPA as non-attainment areas. Teller County is included in <br />the Colorado Springs Non-Attaittment Area for Cazbon monoxide (area with moderate <br />levels of CO: <_12.7ppm, as of February 1999). However, the Colorado Springs non- <br />attainment area only includes a small portion of Teller County, which corresponds to the <br />Highway 24 corridor, and includes the Woodland Pazk area. Therefore, air quality <br />monitored in this azea is not representative of the site of the proposed project. <br />According to the EPA AIRS (Aerometric Information Retrieval System) program <br />information, which includes pollutants' levels at county monitoring stations, particulate <br />matter in Teller County2 is currently below the NAAQS. However, violations of PM10 <br />standazds were observed during 1994, 1995, and 1996 (see Table 3.2.). Carbon <br />monoxide has not been monitored in Teller County. It is important to mention that these <br />levels of air pollutants were monitored in a station located near Cripple Creek, south of <br />the proposed projected site. Cripple Creek is chazacterized as a developed area, with <br />concentrated traffic, which is in great contrast to the rura] setting of the gravel pit site. <br />Therefore, pollution levels at the monitoring site are not representative of the proposed <br />project site. <br />I The six criteria pollutants are: Carbon monoxide, Nitrogen dioxide, Ozone, Lead, Particulate matter, and Sulfur <br />dioxide. <br />Z The only air quality monitoring station in Teller County is located near Cripple Creek, in a rural, commercial location <br />(Brnnet Avenuc and 2n° Street). <br />Hydrosphere Resource Consultants, 1002 Walnut Suite 200, Boulder, CO 80302 <br />