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Analysis of the new cumulative growth information has shown that some roadway segments have improved levels of service that now require no mitigation improvements for 2010. However, it is expected that these improvements will still be needed in the future beyond 2010. The Master Plan and MEIR require a full traffic impact analysis for each subsequent Specific Plan; and at that time, additional traffic studies will be prepared for cumulative traffic impacts with an expanded time frame. An updated noise study for Neighborhood F was prepared using the updated traffic data in compliance with MEIR mitigation measure4.14-1. The noise study showed increased 60 and 65 db noise contours for Mascot Boulevard, De Anza Boulevard and Mountain House Boulevard. As a result, higher noise walls or greater setbacks than originally adopted are needed. Such new information was required by the MEIR to refine the general noise mitigation identified in the MEIR and previous SEIR. The proposed noise mitigation measures for Neighborhood F thereby fine tune previous mitigation measures and do not constitute new information of substantial importance requiring preparation of a supplemental or subsequent EIR. The initial study has not identified any mitigation measures or alternatives previously found not to be feasible would in fact be feasible, and would substantially reduce one or more significant effects of the project. Nor have any mitigation measures or alternatives which are considerably different from those analyzed in the previous MEIR been identified that would substantially reduce one or more significant effects on the environment. In summary,the new geological and updated traffic and noise information does not result in new significant effects not discussed in the MEIR. The traffic impacts identified in the updated traffic study are equivalent or lower in impact in 22 of 24 arterial road segments. While higher impacts were identified along two road segments,the general effects of cumulative development were discussed in the MEIR and the two road segments will be mitigated on a similar basis as other road segment mitigations (See chapters 4.12 and 6 of the MEIR. Noise impacts of traffic were discussed in the MEIR(see chapter 4.14 of the MEIR) which required additional noise studies for Specific Plans or Development Plans. The outcome of such noise studies with its recommendations for raised mitigation measures is therefore within the mitigation of the EIR and not new impacts. The new geological information about the Great Valley Fault Zone does not result in new impacts for impacts resulting from seismic events were discussed in the MEIR and its mitigation measures are sufficient to mitigate the potential impacts of the fault. (See chapter 4.6 of the MEIR). III.D. Finding: Based upon a review of the whole record,the County finds that there is no substantial evidence that the Neighborhood F Project will have a significant effect on the environment and that Mitigated Negative Declaration reflects the County's independent judgment and analysis. CEQA Requirements: CEQA Guidelines Section 15074 states: (b) Prior to approving a project, the decision making body of the lead agency shall consider the proposed 31