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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? IS/MND Mitigation Measure: • Mitigation Measure GEO-1: Perform Geotechnical Investigation Project Change Discussion: The proposed changes to the Proposed Project would have the same impacts to geology and soils 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 geology and soils as defined in CEQA Guideline section 15162(a). Hazards and IS/MND Hazardous Pages 3-21 LTS/M No No No Yes Materials through 3-23 IS/MND Discussion: With the implementation of mitigation, the Proposed Project would not result in any residual significant and unavoidable impacts related to risks of upset or accidental release of hazards and hazardous materials. Therefore, project implementation would not result in any residual significant impacts related to hazards and hazardous materials. IS/MND Mitigation Measures: • Mitigation Measure HAZ-1: Store,Handle, Use Hazardous Materials in Accordance with Applicable Laws • Mitigation Measure HAZ-2: Properly Dispose of Contaminated Soil and/or Groundwater • Mitigation Measure HAZ-3: Properly Dispose of Hydrostatic Test Water • Mitigation Measure HAZ-4: Develop and Maintain Emergency Access Strategies Project Change Discussion: The proposed changes to the Proposed Project would have the same chances to cause a significant hazard to the public and/or the environment as the Original Proposed Project. The addition of 720 feet or 0.1 mile of new pipeline would not result in any new impacts 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 the potential to cause a significant hazard to the public and/or the environment as defined in CEQA Guideline section 15162(a). Hydrology and IS/MND Water Quality Pages 3-24 LTS/M No No No Yes through 3-28 IS/MND Discussion: December 2014 3-6