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INVENTORY OF EXISTING CONDITIONS <br />USEPA identifies the DNL as the principal metric for airport noise analysis. The FAA requires DNL as the <br />noise descriptor for use in aircraft noise exposure analysis and noise compatibility planning. DNL levels <br />are commonly shown as lines of equal noise exposure, similar to terrain contour maps, referred to noise <br />contours. All residential areas are considered compatible with cumulative noise level below DNL 65 dBA. <br /> <br />As Section 1.13.9, Land Use describes, there are residential land uses near the Airport. These areas may <br />be sensitive to aircraft noise associated with the Airport. The Airport’s aviation noise contours were <br />updated in 2010 as part of the Airport’s previous Master Plan Update. Similarly, the contours are being <br />updated as part of this Master Plan Update. <br /> <br />Noise contours were updated for the baseline, existing conditions year of 2016 and the forecast year of <br />2025 using the Aviation Environmental Design Tool (AEDT), Version 2. As shown in Figure 1-19, the 2016 <br />DNL 65 noise contour is entirely on Airport property and there are no incompatible land uses within this <br />contour. Figure 1-19 also shows that the forecast 2025 65 DNL noise contour is almost entirely on Airport <br />property. The northern portion of this noise contour just barely passes the Airport property line. There are <br />no incompatible land uses within this forecast noise contour. <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />EUGENE AIRPORT MASTER PLAN 1-61 <br /> <br />