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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 MSIR. 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). The County finds these conclusions constitute substantial evidence that the 1994 Master EIR is still appropriate for use for evaluating the Neighborhood F Project. In addition,the County received comments from others concerning the 1994 Master EIR, the Initial Study and the Neighborhood F Project. The Planning Department and independent consultant preparing the Initial Study reviewed all of these comments. According to the Planning Department and the independent consultant none of the comments received constituted evidence of changed circumstances leading to major revisions of the 1994 Master EIR because of new significant environmental effects that were not address in the 1994 Master EIR or impacts which were substantially increased in severity. Concerning the comments received by the County regarding impacts to Old River or other waters of the State associated with the discharge of tertiary treated effluent into Old River, the County performed and certified an Initial Study and Mitigated Negative Declaration in 1999 (SCH 98032047),hereinafter referred to as 1999 Mitigated Negative Declaration. The 1999 Mitigated Negative Declaration evaluated the environmental effects to waters of the State and specifically Old River of issuing a Conditional Use Permit for a phased and full build-out wastewater treatment plant facility. In addition,the 1999 Mitigated Negative Declaration evaluated the environmental effects of discharging tertiary treated wastewater both onto land within the community, as well as conversion to a direct river discharge when determined to be appropriate under State and Federal Law, based on actual field tests. 22