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Appendix G <br />Air Quality Analysis Modeling Report <br />Table 3-5 <br />MAXIMUM AERMOD PREDICTED IMPACTS FROM PHASE 1 <br />(RAILROAD CONSTRUCTION) <br /> Maximum Maximum <br /> <br />Averaging <br />Predicted Background Predicted + Primary <br />CAAQS <br />Pollutant <br />Period <br />Concentration Concentration <br />s 3 Background NAAQS <br />s s <br />(µg/m ) <br /> (µg/m3) (µg/m) Concentration <br />3 (µg/m ) <br /> (µg/m <br />) <br />NOz z Annual 1.7 34 36 100 100 <br /> <br />CO 1-Hour 93.7 6,869 6,963 10,000 10,000 <br /> <br /> 8-Hour 28.2 4,579 4,607 40,000 40,000 <br /> Annual 0.001 11 11.001 80 80 <br />SOz 3-Hour 0.1 110 110.1 365 365 <br /> 24-Hour 0.03 39 39.03 1,300 700 <br /> Annual 2 24 26 NA 50 <br />PM <br />Io <br /> 24-Hour 37.7 54 92 150 150 <br /> Annual 0.6 9 9.6 15 15 <br />PM <br />z.s <br /> 24-Hour 10.9 22 32.9 35 35 <br />Notes <br />1. Area Som~ce 1 was included in analysis. <br />2. Assumes 100 percent conversion of modeled NOX to NOz. <br />3. Background concentrations derived from: <br />PMio - Rifle, Garfield County. (1998-2000 data collected by CDPHE) <br />PMzs - Cn~and Junction, Mesa County. (1999-2004 data collected by CDPHE) <br />SOz. - Colorado College, Colorado Springs, El Paso County. (1998-2000) -recommended by Nancy Chick (CDPHE) <br />for use in the Vernal and Glenwood Springs Resource Management Plans. <br />NOz - Woodmen and Colorado College stations, Colorado Springs, El Paso County (1998-2000 data) <br />CO = Grand Junction, Mesa County. (Average of 2001-2004) <br />G-12 <br />DBMS 524 <br />