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l 3.3 Air Quality and Climate Change i Regulation of TACs,termed Hazardous Air Pollutants(HAPS)under federal regulations,is achieved I� through federal,State and local controls on individual sources.The 1977 Clean Air Act Amendments required the U.S. EPA to identify National Emission Standards for Hazardous Air Pollutants (NESHAPs)to protect public health and welfare.These substances include certain volatile organic chemicals,pesticides,herbicides,and radionuclides that present a tangible hazard,based on scientific studies of exposure to humans and other mammals. There is uncertainty in the precise degree of hazard. State The ARB manages air quality, regulates mobile emissions sources, and oversees the activities of county Air Pollution Control Districts and regional Air Quality Management Districts. ARB establishes state'ambient air quality standards and vehicle emissions standards. Criteria Air Pollutants California has adopted ambient standards that are more stringent than the federal standards for the criteria air pollutants.These are shown in Table 3.3-2.Under the California Clean Air Act(CCAA) ' patterned after the FCAA, areas have been designated as attainment or nonattainment with respect to the state standards. Table 3.3-3 summarizes the attainment status with California standards in the project area.As mentioned above, existing air quality in Lake County is cleaner than most ' areas of the state and nation,as evidenced by the attainment of all state standards. ^, Toxic Air Contaminants t The State Air Toxics Program was established in 1983 under Assembly Bill (AB) 1807 t.f (Tanner). A total of 243 substances have been designated TACs under California law;they include the 189(federal)hazardous air pollutants(HAPS)adopted in accordance with AB 2728. The Air Toxics"Hot Spots"Information and Assessment Act of 1987 (AB 2588) seeks to identify and evaluate risk from air toxics sources;however,AB 2588 does not regulate air toxics emissions.Toxic air contaminant emissions from individual facilities are quantified and prioritized. "High-priority" _ facilities are required to perform a health risk assessment and, if specific thresholds are violated, " f are required to communicate the results to the public in the form of notices and public meetings. ;_. In August of 1998,ARB identified particulate emissions from diesel-fueled engines(diesel particulate matter; or DPM) as TACs. ARB subsequently developed the Risk Reduction Plan to Reduce Particulate Matter Emissions from Diesel-Fueled Engines and Vehicles(ARB,2000).The document f represents proposals to reduce diesel particulate emissions, with the goal of reducing emissions and associated health risks by 75 percent in 2010 and by 85 percent in 2020. The program aims ' to require the use of state-of-the-art catalyzed diesel particulate filters and ultra low sulfur diesel s- fuel on diesel-fueled engines. In 2005,ARB published the Air Quality and Land Use Handbook:A Community Health Perspective (ARB, 2005). The primary goal in developing the handbook was to provide information that will help keep California's children and other vulnerable populations out of harm's way with respect fto nearby sources of air pollution. The handbook highlights recent studies that have shown that public exposure to air pollution can be substantially elevated near freeways and certain other I .� Munn&Pertdns Quarry Excavation Permit 3.3-9 ESA 1211085 Draft EIR - April 2011 n