13A Action Items - Laserfiche WebLink

Home

City of San Leandro 2023-2031 Housing Element Update 3-44 designation. Moving these properties required constructing sea walls in locations such as the west edge of Mission Bay Mobile Home Park and raising bank heights along the Estudillo Canal below Wicks Boulevard. Another flood hazard is dam failure. The California Office of Emergency Services determined that the failure of the East Bay Municipal Utility District (EBMUD) dams on San Leandro Creek would significantly impact San Leandro. The Upper San Leandro Reservoir Dam was built in 1977, and the Lake Chabot Dam was built in 1892. Both dams are inspected on an annual basis. Although dam failure is unlikely, fast-moving water could cause substantial damage in the northern part of San Leandro and would flood most of the city. Tsunamis are not identified as a major risk to San Leandro. The City of San Leandro abides by the requirements of the National Flood Insurance Program which has flood damage prevention regulations that affect how homeowners and developers remodel, renovate, or add on to property. These added requirements may increase the costs of developing homes, potentially constraining future housing development or improvement. Global sea-level rise has been accelerating and poses a risk to the western side of San Leandro. In the 2035 General Plan, the City of San Leandro adopted a sea level rise scenario of 55 inches by 2100, which was estimated in the San Francisco Bay Conservation and Development Commission report Living with a Rising Bay.35 The report found that flooding associated with sea level rise will first affect marshlands and eventually threaten property and assets in southwestern San Leandro, reaching the neighborhoods east of Wicks Boulevard. In San Leandro, the assets most at risk from sea level rise include transportation assets, powerlines, cultural amenities along the shoreline, and neighborhoods, parks, and schools in the southwestern portion of the city. While the Downtown and area surrounding the San Leandro BART station remain outside of the projected boundaries of sea level rise, the compounding effects of sea level rise could impede access to the city via I-880 and significantly impact San Leandro residents that live west of the freeway.36 City of San Leandro participates in several regional collaboratives to address sea level rise and climate equity, including the San Leandro Bay/Alameda-Oakland Estuary Adaptation Working Group, Bay Climate Adaptation Network, and BayAdopt. The City’s Climate Action Plan, adopted in 2021, has created several adaption strategies, and the City is currently updating its Environmental Hazards Element with policies to improve community resilience to sea level rise. 3.3.6 Environmental Hazards due to Contamination Historic and present activities such as manufacturing, plating, cleaning, refining, and finishing frequently involve chemicals that are considered hazardous that are accidentally released into the environment. These activities have resulted in a high level of toxins in the ground of some sites. The city also has older buildings with asbestos, lead paint, and other materials that are potentially hazardous if disturbed. Lead-based paint was widely used before it was banned in 1978. It does not pose a threat if left undisturbed, but deterioration or disruption can result in exposure, which in turn can cause damage to the brain and nervous system. Friable asbestos also may be present in older buildings. If asbestos fibers become airborne during demolition or remodeling, they can contribute to lung disease and other ailments. Polychlorinated biphenlys (PCBs) represent another potential threat—these materials were commonly used in electrical equipment prior to 1979. The 35 City of San Leandro Climate Hazard Assessment. 2017. Available: https://www.sanleandro.org/civicax/filebank/blobdload.aspx?blobid=27831. Accessed October 28, 2021 36 ibid.