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Geology. Soils, and Seismicity. Alternative 4 improves on Alternatives 1 and 2 by eliminating the eastern estate lots, thereby eliminating construction in an area of potential landslides. Noise. Because Alternative 4 only includes 51 homesites, less noise would be generated following buildout due to a lower volume of traffic and less noise would be generated during construction due to the construction of fewer individual homes. Open Space. Alternative 4 provides a greater open space benefit than the Original Project because the land area potentially to be set aside as permanent open space is greater: up to 496 acres as compared with 482 acres for the Original Project. Police and Fire (Emergency Access). Alternative 4, with public access via Hearst Drive, an emergency fire road from the existing City water tank to the cul-de-sac by Lot 51, and an emergency access route from the Grey Eagle Estates subdivision to the Project site, would have acceptable access under emergency conditions. Alternatives 1 and 2, with the five eastern estate lots, would not. Transportation. The analysis of traffic under the Original Project and the alternatives shows that congestion on Pleasanton's road network would exist without the Original Project and, in fact, that the Original Project would have virtually no impact on congestion as measured by intersection levels of service (LOS) and little discernible effect on congestion as measured by seconds of delay. Nevertheless, the fact that Alternative 4 has a lower number of housing units means that average daily traffic would be substantially reduced as compared with the Original Project, and even the relatively slight traffic effects would be reduced. Impacts on residential streets in the area, not found to be significant for the Original Project, would also be reduced under Alternative 4. For these reasons, Alternative 4 may be seen as the environmentally superior alternative. VI. SIGNIFICANT ENVIRONMENTAL IMPACTS IDENTIFIED IN THE EIR Findings and Recommendations Regarding Significant Project-Level and Cumulative Impacts Which are Avoided or Mitigated to a Less Than Significant Level The discussion of the effects of the mitigation measures recommended to address significant project-level and cumulative impacts of the Environmentally Superior Project also includes descriptions of the provisions developed by the City as part of the Environmentally Superior Project's conditions of project approval. These provisions, reflected in the Mitigation Monitoring and Implementation Plan (MMIP), serve to ensure the appropriate implementation of the recommended mitigation measures Page 11 of 43