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.34-21. The~Eugene Mar!on ............. Analysis, ~Apfil 2000, was found to be in compliance with state ai~o~ noise standards by the State of Oregon Depa~ment of Enviromental Quality :~ ~ ....... 1981. Federal Highway Administration noise standards apply whenever federal funds are used in the construction or reconstruction of a highway. A noise study is required if the construction will add a through-lane of traffic or significantly alter either the horizontal or vertical alignment of the highway. The significance of a change in alignment has to do with the effect that the alignment change has on noise levels. State funded Oregon Department of Transportation projects are generally developed in conformance with the federal noise standards. Policies &2~i';..:}~Design of new street, highway, and transit facilities shall consider noise mitigation measures where appropriate. ~2,~-3~,}.2.}.Design and construction of new noise-sensitive development in the vicinity of existing and future streets and highways with potential to exceed general highway noise levels shall include consideration of mitigating measures, such as acoustical building modifications, noise barriers, and acoustical site planning. The application of these mitigating measures must be balanced with other design considerations and housing costs. g4C.~4Local governments shall continue to monitor, to plan for, and to enforce applicable noise standards and shall cooperate in meeting applicable federal and state noise standards. Air~ Water ~~ G~al_L6) Findings The high value placed on clean air and water by local residents is reflected in local commitments to plans and programs directed toward reducing air and water pollution. The Eugene-Springfield metropolitan area has a strong potential for elevated levels of air pollution due to the surrounding mountains, which provide a barrier to ventilation and contribute to periodic episodes of stable atmospheric conditions. These conditions effectively limit dilution and dispersion of air pollutants, resulting in the build-up of concentrations near the ground. Exhibit B: Proposed amendments to Chapter III-C, Environmental Resources Element,Page 21 of 25 of the Eugene-Springfield Metropolitan Plan (Metro Plan).