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City of Pleasanton Recycled Water Project CEQA Addendum Table 1 Environmental Review of Proposed Project Changes Environmental Issue Area Where Impact(s) were Analyzed in Prior Environmental Documents. What were the Environmental Impact conclusions for the Original Proposed Project? Do Proposed Changes Involve New Significant or Substantially More Severe Impacts? Any New Circumstances Involving New Significant Impacts or Substantially More Severe Impacts? Any New Information Requiring New Analysis or Verification? Are Prior Mitigation Measures Sufficient for Addressing Any New Potential Changes or Impacts? IS/MND Mitigation Measures: • Mitigation Measure BIO -1: Conduct Alameda Whipsnake Pre -construction Protocol Level Plant Surveys • Mitigation Measure BIO -2: Conduct Breeding Surveys • Mitigation Measure BIO -3: Conduct Nesting Surveys 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 booster pump station would not result in any new impacts to biological resources as was evaluated in the IS/MND. As shown in Appendix C, on March 9, 2018 a biological habitat evaluation was conducted at the proposed site at the Ken Mercer Sports complex and determined that the construction activities associated with the addition of the booster pump station would be substantially the same as they were originally described in the IS/MND. The potential exists that construction activities could potentially affect special status bird species. However, existing Mitigation Measures BIO1 and B102 would reduce any impacts to less than significant levels and would need to be done within 14 days of construction. The Revised Proposed Project therefore would not have any incrementally significant effects on biological resources as defined in CEQA Guideline section 15162(a). Cultural Resources IS/MND Pages 3-16 through 3-18 LTS/M No No No Yes 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 are 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 the new booster pump station would not result in any new impacts to cultural resources as was evaluated in the IS/MND. As part of the evaluation, a new cultural resources investigation was conducted at the proposed site at the Ken Mercer Sports Complex. This investigation included a new records search, pedestrian survey by a certified cultural resources specialist, and government -to -government outreach to local Native American Tribes to meet the requirements of AB 52. Due to the sensitivity of cultural resources, this information is not available for public review. However, the study determined that the construction activities associated with the addition of a new booster station would not have any known impact on known cultural resources would be substantially the same as they were originally described in the IS/MND. The Revised Proposed Project therefore would not have any incrementally significant effects on cultural resources as defined in CEQA Guideline section 15162(a). April 2018 3-9