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Expanded Environmental Checklist <br /> Prepared for the Office of Cortmunity Planning <br /> Snohomish County, Washington <br /> Proposal: Carmunity Transit Operating Base <br /> Page 5 <br /> Subjective responses to single-even� aircraft noise levels further <br /> reinforte the very low level of intrusion that the hypothetical 56 and 62 <br /> d8A bus activities generate, as shown in the following chart. <br /> RELATIONSHIP BETWEEN SINGLE-EVENT ' <br /> AIRCRAFT NOISE LEVEL AND SUBJECTIVE RESPONSE <br /> Maximum <br /> Sound , <br /> Level <br /> (dBA) Subjective Response <br /> _________________________________________________________________ <br /> 120 Extremely Noisy - Very Noisy Unbearable <br /> 110 Noisy - Very Noisy Very Annoying <br /> 100 Noisy Annoying - Intrusive <br /> 9p Moderate/Acceptable Intrusive - Noticeable <br /> 60 Quiet - Moderate/Acceptable Noticeable <br /> 7p Quiet Noticeable <br /> 60 Just Noticeable <br /> Source: Great Britain Comnittee on the Pro6lem of Noise. <br /> These numbers collectively suggest that the noise generated by the <br /> f,ortmunity Transit Operating Base should have only a comparatively nom;nal <br /> impact upon the closest residences. This will remain true even when the <br /> residences are outside, and with Operating Base activities occurring <br /> during very early or late hours. <br /> Attached is Figure 14 from the Environmental Impact StaCement prepared for <br /> the Paine Field Master Plan. This Figure shows the year 2000 noise <br /> contours which would result from the "preferred" development of Paine <br /> Field. It is included to show the relationship of the Comnunity Transit <br /> site to the airport runways and noise-impacted areas. <br /> (7) Light and Glare. <br /> As previously noted, the Operating Base will be in use throughout the <br /> hours of darkness. The building areas, refuPling island, bus wash, a�d <br /> bus parkina area will be lighted to permit night service activities. The <br /> lighting fixtures selected for this facility will be of a t,ype to direct <br /> the light downward. This fixture type will reduce the amount of li yht <br /> that will be "spilled" ontn adjacent properties and, more importantly, <br /> will reduce the potential for interference with aircraft operations at <br /> Paine Field. <br />