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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? Mineral Resources IS/MND NI No No No Yes Page 3-31 IS/MND Discussion: The Proposed Project is not located in an area identified as containing mineral resources classified MRZ-2 by the State geologist that would be of value to the region and the residents of the state. As a result, the Proposed Project would not result in the loss of availability of known mineral resources; therefore, no impact is expected. No mitigation is required. IS/MND Mitigation Measures: • None identified or necessary. Project Change Discussion: The proposed changes to the Proposed would have the same impacts to mineral 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 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 mineral resource effects as defined in CEQA Guideline section 15162(a). IS/MND Noise Pages 3-31 LTS/M No No No Yes through 3-33 IS/MND Discussion: The Proposed Project has the potential to generate noise during the construction phase through the use of equipment and construction vehicle trips. Once constructed, the Proposed Project would not create any new sources of operational noise.Therefore,operation of the pipeline would not result in permanent noise impacts. Construction of the Proposed Project would generate temporary and intermittent noise. Noise levels would fluctuate depending on the particular type,number,and duration of use of various pieces of construction equipment. Back-up beepers associated with trucks and equipment used for material loading and unloading at the staging area would generate significantly increased noise levels over the ambient noise environment in order to be discernable and protect construction worker safety as required by OSHA (29 CFR 1926.601 and 29 CFR 1926.602). Businesses and residences in the vicinity of the project area could thus be exposed to these elevated noise levels. Construction activities associated with the project would be temporary in nature and related noise impacts would be short-term. However, since construction activities could substantially increase ambient noise levels at noise- sensitive locations, construction noise could result in potentially significant, albeit temporary, impacts to sensitive receptors. Compliance with the City noise ordinance and implementation of the following mitigation measures is expected to reduce impacts related to construction noise,to a less-than-significant level. IS/MND Mitigation Measures: • Mitigation Measure NOI-1: Limit Construction Hours • Mitigation Measure NOI-2: Locate Staging Areas away from Sensitive Receptors December 2014 3-8