Reso 2025-151 Environmental Hazards Element General Plan

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S A N L E A N D R O G E N E R A L P L A N E N V I R O N M E N T A L H A Z A R D S 7-2 The Element also sets forth a proactive strategy for addressing noise issues in the community. San Leandro’s proximity to a major international airport and location alongside some of California’s busiest freeways and rail corridors create relatively high levels of noise in much of the city. The Element recommends several programs to resolve domestic, transportation, and airport noise conflicts. Earthquakes Seismic Conditions Earthquakes are the most pervasive safety hazard in San Leandro. The eastern edge of the City is crossed by the Hayward Fault, creating the potential for serious and widespread damage. The last great quake on the Hayward Fault—a magnitude 7.0 temblor in 1868—destroyed many buildings in San Leandro and changed the course of the City’s history when it destroyed the Alameda County Courthouse in the center of town (see photo below). A 2008 study of earthquake probabilities by the US Geological Survey and other partners estimated that there is a 63 percent chance that a magnitude 6.7 or greater quake will strike the Bay Area in the next 30 years. It is likely that a quake will occur on the Hayward Fault. A major earthquake could also occur on the San Andreas Fault, which is located about 15 mile west of San Leandro, and the Calaveras Fault, which is about 10 miles to the east (see Figure 7-1. A quake of this magnitude could topple buildings, disrupt infrastructure, cripple the transportation system, and trigger landslides throughout the hills in San Leandro. B. NATURAL HAZARDS Resolution No. 2025-151 Exhibit A 2 of 84