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• City of Pleasanton Recycled Water Project CEQA Addendum Table 3 Environmental Review of Proposed Project Changes Do Proposed Changes Are Prior Involve Any New Mitigation What were the New Circumstances Measures Where Impact(s) Environmental Significant Involving New Any New Sufficient for were Analyzed Impact or Significant Information Addressing in conclusions for Substantially Impacts Requiring Any New Prior the Original More or Substantially New Potential Environmental Proposed Severe More Severe Analysis or Changes or Environmental Issue Area Documents. Project? Impacts? Impacts? Verification? Impacts? Project Change Discussion: The proposed changes to the Proposed Project would have the same impacts to biological resources as the Original Proposed Project. The addition of 720 feet or 0.1 mile of new pipeline would not result in any new impacts to air quality as was evaluated in the IS/MND. Also, the construction activities associated with the revised pipeline conveyance facilities would be substantially the same as they were originally described in the IS/MND as they would also be constructed within existing roadways, highly disturbed areas, and/or public right-of-ways. The Revised Proposed Project therefore would not have any incrementally significant effects on biological resources as defined in CEQA Guideline section 15162(a). IS/MND Cultural Resources Pages 3-16 LTS/M No No No Yes _ through 3-18 IS/MND Discussion: The IS/MND concluded that the construction of the Proposed Project would not have any direct impacts on identified historical and archeological resources. However, construction of the Proposed Project could have significant impacts on unidentified and undiscovered buried cultural resources. However, with the implementation of the following mitigation measures, any impacts would be reduced to less than significant levels. IS/MND Mitigation Measures: • Mitigation Measure CR-1: Halt work if cultural resources are discovered • Mitigation Measure CR-2: Stop work if paleontological remains are discovered • Mitigation Measure CR-3: Halt work if human remains arc found Project Change Discussion: The proposed changes to the Proposed Project would have the same impacts to cultural resources as the Original Proposed Project. The addition of 720 feet or 0.1 mile of new pipeline would not result in any new impacts to cultural resources as was evaluated in the IS/MND. Also, the construction activities associated with the revised pipeline conveyance facilities would be substantially the same as they were originally described in the IS/MND as they would also be constructed within existing roadways, highly disturbed areas, and/or public right-of-ways. The Revised Proposed Project therefore would not have any incrementally significant effects on cultural resources as defined in CEQA Guideline section 15162(a). IS/MND Geology and Soils Pages 3-19 LTS/M No No No Yes and 3-20 IS/MND Discussion: As described in the IS/MND, the Proposed Project may be located in areas that consist of medium dense to dense fine granular soils. In addition, perched groundwater could be present. As such, the soil in some areas of the alignment may have a high susceptibility to liquefaction during seismic shaking. Other portions of the Project may be less susceptible to liquefaction and related damage. Lateral spreading, often associated with liquefaction, is less likely because there are no steep banks or hard ground bordering the Project area, but could still potentially be a hazard. However, with the implementation of the following mitigation measure, any impacts are reduced to less than significant levels. As a result,the following mitigation is proposed: December 2014 34