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CHAPTERFIVE <br /> <br />Draft EIS Recisions <br />TABLE 4.5-11 (modified) <br />ACCELERATED DEVELOPMENT ALTERNATIVE -CLASS II INCREMENT <br />ANALYSIS FOR PARACHUTE SITE <br /> <br />PollntantlParameter PM„ <br />24-hoar PM,a <br />Anneal NO, <br />Anneal <br />Maximum Parachute-only <br />Increment Concentration (µg/m') 61.8 16.8 I0.5 <br />Percent of Class II lncrement (%) 206 99 42 <br />Maximum Cumulative Increment <br />Concentration (µg/m') 61.8 16.8 35.73F,4 <br />Percent of Class 11 Increment (%) 206 99 14375.6 <br />Source: RTP 1998b <br />exceedances of the PSD Class II PM,° and <br />Accelerated Development Alternative could not receive the required PSD air pollutant emissions <br />permit and would not be allowed to proceed as described. In addition, it is reasonable to assume <br />a separate Accelerated Development Alternative cumulative regional haze impact analysis would <br />exceed 1.0 deciview at the Flat Tops and other wilderness azeas. <br />Page 4-33; Noise <br />The EPA (1974) has identified an L~, level of 55 decibels [dB(A)] as the maximum sound level <br />that would not adversely impact public health and welfaze (Table 4.6-1). The State of Colorado <br />has established 55 dB(A) daytime and 50 dB(A) nighttime as their threshold levels. For the <br />purposes of this assessment, a level of 55 dB(A) daytime and 50 dB(A) nighttime aze is used as <br />the criteria for a significant adverse impact. <br />Page 4-33; Noise Sources <br />• pumps <br />• trains and rail cars <br />• compressors <br />Page 4-34 <br />• compressors <br />• conveyors <br />• rail caz loading <br /> <br />5-25 <br />