Planning Commission Agenda Packet 09092026

City of Pleasanton—Additional Housing Sites Rezonings Project Addendum CEQA Guidelines Section 15164 Addendum 90 requirements mandate site investigation, cleanup, and oversight by regulatory agencies before redevelopment can occur. Contaminated sites must undergo environmental site assessments and, if necessary, remediation to reduce contamination to acceptable levels prior to occupancy or reuse. Because remediation is required and enforced prior to development, exposure risks are reduced and controlled at the project level. The Prior FEIR concluded that impacts would be less than significant. Proposed Project Analysis and Conclusion According to the Cortese List,6 none of the proposed sites are located on or near active identified contamination sources. Future development at the proposed sites would be required to complete necessary studies and assessments, including a Phase I ESA. This assessment would analyze the project site’s historic and current uses and potential for contamination sources. Therefore, 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 and disclosed in the Prior FEIR. No further analysis is required. e) Proximity to Public Airport Safety Hazard Would the project: For a project located within an airport land use plan or, where such a plan has not been adopted, within two miles of a public airport or public use airport, would the project result in a safety hazard or excessive noise for people residing or working in the project area? Summary of Prior FEIR The Prior FEIR found that implementation of the General Plan would not interfere with operations at the Livermore Municipal Airport or create aviation-related safety hazards for people in the Planning Area. The analysis reflected that planned land uses and development patterns under the General Plan would remain compatible with airport operations and applicable land use planning policies governing airport safety. Because no conflict with airport operations or exposure to aviation hazards was identified, no mitigation measures were required. The Prior FEIR concluded that impacts would be less than significant. Proposed Project Analysis and Conclusion The proposed sites are not located within 2 miles of a public airport and are not within an airport land use plan area. Therefore, no impacts would occur, 6 California Environmental Protection Agency (Cal/EPA). Cortese List Data Resources. Website: https://calepa.ca.gov/sitecleanup/corteselist/. Accessed December 19, 2025.