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SAN LEANDRO GENERAL PLAN ENVIRONMENTAL JUSTICE EJ-9 several neighborhoods scoring within the 90th to 100th percentile for Diesel Particulate Matter levels relative to all California census tracts. San Leandro is not significantly impacted by other forms of air pollution that impact the San Francisco Bay Area Air Basin, including Particulate Matter 2.5 (PM2.5) and Ozone. The city has relatively low levels of these pollutants compared to adjacent communities. Ground-Based Pollution Communities can also be exposed to ground-based sources of pollution, including from industrial facilities. Exposure to ground -based pollution in San Leandro tends to be greatest for neighborhoods in the northwestern portion of the city. Ground-based pollution in San Leandro includes contaminated cleanup sites and handlers of hazardous materials. The City works closely with Alameda County Department of Environmental Health to monitor cleanup sites, including regular contact, joint inspections, and scheduled monthly meetings. Solid Waste Sites. Solid waste facilities are places where household garbage and other types of waste are collected, processed, or stored. Landfills, transfer stations, and composting facilities are considered solid waste sites. These facilities can release air pollutants and impact water quality if compounds present in waste leach into groundwater, surface water, or soil. The CalEnviroScreen tool indicates that there are disparities in the potential impacts that solid waste sites have in San Leandro, generally concentrated in the western portion of the city. Most solid waste sites in San Leandro identified in the CalEnviroScreen tool are located within designated Environmental Justice Communities. Cleanup Sites. Cleanup sites are areas that are or were previously impacted with contamination. The California Department of Toxic Substances Control, State Water Resources Control Board/San Francisco Regional Water Quality Control Board, U.S. Environmental Protection Agency, and Alameda County Environmental Health Department Local Oversight Program are responsible for assessing exposure to cleanup sites. People living near cleanup sites may be more exposed to hazardous chemicals from the sites than those living farther away.7 The CalEPA CalEnviroScreen tool aggregates information about cleanup sites from other environmental regulatory databases. Sites throughout San Leandro, 7 California Office of Environmental Health Hazard Assessment (2022). Cleanup Sites. Available at: https://oehha.ca.gov/calenviroscreen/indicator/cleanup-sites