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within a reasonable margin of error, keeping in mind that an increase of 3 dBA is barely <br />perceptible to the human ear. The remainder of this section discusses the future traffic <br />noise impacts based on computer -generated modeling results. <br />111 <br />Day <br />Night <br />Table 24.4: Existing and Modeled Noise Levels for Receptor M3 <br />Modeled Noise Level <br />Receptor M3 <br />[dBA] <br />Existing Noise Level <br />Receptor M3 <br />[dBA] <br />Leg = 65.9 <br />Leg = 64.0 <br />Ley = 62.0 <br />Noise Modeling Results <br />The noise analysis was conducted for the existing year 2002 and for one year after the <br />AUAR development scenario, year 2008. Traffic conditions for both morning and <br />afternoon peak traffic hours were analyzed. The year 2008 analysis includes the impact <br />of the AUAR development traffic as well as the increased background traffic on local and <br />regional roadways over the six -year period. Existing speed limits were assumed, and the <br />remaining data necessary for analysis was taken from the traffic analysis of Section 21. <br />Traffic noise modeling results for 2008 are presented in Tables 24.5 and 24.6. Both <br />daytime and nighttime Ley values are shown. The analysis shows that during daytime <br />hours, for both existing and future traffic scenarios, there are no receptors that exceed <br />state standards. Three receptors (Blocks 36, 37, and 38) currently exceed the state <br />nighttime NAC-1 standard of 52 dBA. These receptors will continue to exceed the state <br />nighttime NAC-1 standard in 2008, along with one additional receptor, Block 28. These <br />four blocks are all located along the south side of Industry Avenue. <br />23/24-4 <br />