3_Exhibit C_ADDENDUM ONLY - Laserfiche WebLink

City of Pleasanton—Stoneridge Mall Residential Project CEQA Checklist Section 15183 Checklist/15164 Addendum 146 FirstCarbon Solutions Https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480017/Consistency Checklist/21480017 Stoneridge Mall Residential Project Checklist Addendum_Updated.docx applicable criteria except in situations where pile driving occurs. Goal 1, Policy 1, Program 1.6 of the City’s Noise Element required a vibration study to address site-specific construction vibration impacts associated with pile driving or similar vibration-producing activities. The Prior EIR concluded that implementation of MM 4.J-2 would reduce construction-related vibration to a less than significant level. Additionally, the Prior EIR found that train-related vibration exposure at Sites 8, 11, 14, and 18, which are in close proximity to the Union Pacific Railroad (UPRR) mainline tracks, may be substantial. Goal 1, Policy 1, Program 1.2 of the City’s Noise Element requires a site-specific vibration analysis to address the applicable Federal Transit Administration (FTA ) vibration impact criteria. As a result, the Prior EIR concluded that compliance with Program 1.2 of the City’s Noise Element would ensure that this impact is less than significant. Additionally, the project site is over 3 miles from the UPRR tracks, substantially decreasing the likelihood of significant vibration impact. Analysis of Proposed Project A noise and vibration impact analysis was prepared by Ramboll, dated October 27, 2022. The report is included in Appendix G. The study assessed the proposed project’s compliance with MM 4.J-2 (Assessment of Project’s Potential Construction Vibration Impacts on Neighboring Sensitive Uses). The analysis demonstrates that vibration from on-site construction and construction truck routes were evaluated based on FTA guidelines. Based on the results of the analysis, the vibration limits set in the Prior EIR were not exceeded at any off-site location. Therefore, no additional measures are required and construction-related vibration impacts would be less than significant. The project site is not also located on any of the identified sites that could be impacted by train activity vibration levels (Sites 8, 11, 14, and 18), and the proposed project is not located within 100 feet of any railroad tracks. In addition, implementation of the proposed project would not include any permanent sources of vibration that would expose persons in the project vicinity to groundborne vibration levels that could be perceptible without instruments at any existing sensitive land use in the vicinity of the project site. Therefore, operational groundborne vibration impacts would be less than significant. Therefore, there are no environmental effects of groundborne vibration that are peculiar to the proposed project or the parcels on which the proposed project would be located. Impacts would be less than significant and the proposed project would not result in a new or more severe adverse impact that was not previously identified in the Prior EIR. c) Airports and Excessive Noise Levels Prior EIR Conclusions The Prior EIR found that aircraft/airport noise exposure associated with Livermore Municipal Airport is expected to be well below 60 dB Ldn at the closest potential site for rezoning (Site 14) within the City of Pleasanton based on the CY 2020 noise exposure map presented in the General Plan. The Prior EIR also found that interior aircraft-related noise exposure is not expected to exceed the applicable 45 dB Ldn criterion. However, maximum noise levels from aircraft departures to the west