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6.0 Significant Unavoidable Environmental Effects/Irreversible Changes <br />Avion Project SEIR <br />Page 6-1 <br />Chapter 6 <br />Significant Unavoidable Environmental <br />Effects/Irreversible Changes <br />This section addresses significant environmental impacts that cannot be avoided and irreversible <br />environmental changes that would be involved should the project be implemented. <br />6.1 Significant Environmental Effects which <br />Cannot Be Avoided if the Project Is <br />Implemented <br />In accordance with CEQA Guidelines Section 15126.2 (b), any significant unavoidable impact of a <br />project, including those impacts that can be mitigated but not reduced to below a level of <br />significance despite the applicant’s willingness to implement all feasible mitigation measures, must <br />be identified in the SEIR. The project would not result in any new significant unavoidable impacts <br />that were not previously identified in the 1998 Environmental Impact Report (EIR). Previously <br />identified significant unavoidable impacts associated with buildout of the Subarea Plan that would <br />not be mitigated to less than significant for the project include: <br />• Traffic <br />• Air Quality (direct and cumulative) <br />• Natural (Mineral) Resources and Agriculture <br />• Visual Resources/Landform Alteration <br />Table S-1 in the Executive Summary summarizes the project’s significant environmental impacts and <br />mitigation measures that would reduce impacts to a level less than significant. Chapter 11, <br />Mitigation Monitoring and Report Program, lists the project-specific mitigation measures. <br />6.2 Irreversible Environmental Changes which <br />Would Result if the Project Is Implemented <br />In accordance with CEQA Guidelines Section 15126.2 (c): <br />Uses of nonrenewable resources during the initial and continued phases of the <br />project may be irreversible since a large commitment of such resources makes <br />removal or nonuse thereafter unlikely. Primary impacts and, particularly, secondary <br />impacts (such as highway improvements which provide access to a previously <br />inaccessible area) generally commit future generations to similar uses. Also <br />irreversible damage can result from environmental accidents associated with the