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City of Pleasanton 475 and 493 St. John Street Mixed-Use Project 42 The Final EIR identified 11 sites in the DSP area which are located on a list of hazardous materials sites complied pursuant to Government Code Section 65962.5, one of which is active. The Final EIR concludes that compliance with existing federal, state, and local regulations pertaining to development on designated hazardous materials sites would minimize potential impacts to a less than significant level. The Final EIR determined that there are no airports within two miles of the DSP area and development facilitated by the DSP would not be subject to safety hazards associated with an airport or private airstrip. Impacts would be less than significant. The DSP area is subject to the emergency response and operation plans of Alameda County and the City of Pleasanton. The Final EIR determined that development facilitated by the DSP would be subject to DSP policies regarding emergency access, as well as PMC design standards for new roads and buildings which would ensure adequate emergency vehicle access. Therefore, the Final EIR concludes that compliance with the DSP policies and the PMC would minimize impacts related to emergency evacuation or response to a less than significant level. Because the DSP area is not adjacent to undeveloped lands or wildlands, the risk of wildfire is low and the Final EIR concluded that development facilitated by the DSP would not expose people ort structures to a significant risk of loss, injury, or death involving wildland fires. Impacts would be less than significant. Impacts of the Barone’s Project The following analysis incorporates information from the Phase I Environmental Site Assessment and Subsurface Investigation (ESA) prepared for the project by Ramboll Consulting, Inc. In November 2020. The ESA is included as Appendix E. The ESA identified one recognized environmental condition within the project site, which consisted of areas of elevated lead in shallow soil. The top two feet of soil near current and former structures within the site contain concentrations of lead that exceed State regulatory screening criteria for residential land use but is below federal thresholds. Grading for building pads is expected to reach as much as three feet below the surface and excavations for utility lines and stormwater infrastructure would reach as much as nine feet below the surface. The ESA also identified a potential former underground storage tank within the project site; however, subsurface soil sampling did not identify fuel constituents or other contaminants that exceed screening criteria for residential land use, and no further investigation was recommended (Appendix E). The project would result in the construction and operation of a new mixed-use development. Project construction would include the temporary transport, storage, use, or disposal of potentially hazardous materials including fuels, lubricating fluids, cleaners, solvents, or project site soils containing elevated levels of lead. If spilled, these substances could pose a risk to the environment and to human health. However, as discussed in the Final EIR, the transport, storage, use, or disposal of hazardous materials is subject to various federal, state, and local regulations designed to reduce risks associated with hazardous materials, including potential risks associated with upset or accident conditions. Such regulation includes U.S. Department of Transportation regulations (Hazardous Materials Transport Act, 49 Code of Federal Regulations, Resources Conservation and Recovery Act, Hazardous Waste Control Law (California Health and Safety Code Division 20, Chapter 6.5), and the Hazardous Waste Control Regulations (Title 22, California Code of Regulations, Divisions 4 and 4.5). Additionally, project construction would involve grading of soils potentially contaminated with lead and demolition of all structures on site except the existing single-family residence, and due to their age, these structures may contain asbestos. Demolition and grading could result in upset and