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-23- <br />ram.,, <br />i Noise Committee that this 30 dBA noise attenuation factor be <br />reduced to 20 dBA. This reduction is reasonable because it will <br />reduce construction costs for a developer who wishes to take <br />advantage of this exception language by constructing an <br />appropriate building in an area whose current noise levels are <br />those of a Noise Area Classification 2 area. <br />Subpart 31 Item C provides that the standards for a building <br />in a Noise Area Classification 3 shall be applied to a building <br />in a Noise Area Classification 1 if the following conditions are <br />met: <br />1. The building is constructed in such a way that the <br />exterior to interior sound level attenuation is at least <br />30 dBA. <br />i 2. The building has year-round climate control. <br />3. The building has no areas or accommodations contiguous <br />to it that are intended for outdoor activities. <br />This exception is new; it does not appear in the existing rules. <br />The rationale for the rule is the same as that set forth under <br />the discussion in Item B: that a building with the proper <br />characteristics can be sufficiently protective so that higher <br />outdoor noise levels will be tolerable. It is reasonable to <br />allow more "noise sensitive" land uses in Noise Area <br />Classification Area 3 if the people in the buildings can close <br />the windows and if the building has no areas intended for outdoor <br />activities. It is also reasonable, however, to require the <br />building to have a higher, i.e., 30 dBA, exterior to interior <br />