Regulatory Setting Many statutes, regulations, plans, and policies have been adopted at the federal, state, and local levels to address air quality issues related to transportation and other sources. The proposed project is subject to air quality regulations at each of these levels. This section introduces the pollutants governed by these regulations and describes the regulation and policies that are relevant to the proposed project. Pollutant-Specific Overview Include the California Air Resources Board (ARB) table of state and federal standards here. Air quality standards and status information must be current at the time the environmental document (Draft or Final) is released for public circulation. The (shown below) is typically updated within a few weeks of changes made by the U.S. Environmental Protection Agency (U.S. EPA) or ARB. Update the table to reflect the current standards at the date of publication of your report. Also include the table below summarizing the sources and health effects of air pollution. Air pollutants are governed by multiple federal and standards to regulate and mitigate health impacts. At the federal level, there are six criteria pollutants for which National Ambient Air Quality Standards (NAAQS) have been established: CO, Pb, NO2, O3, PM (PM2.5 and PM10), and SO2. The U.S. EPA has also identified nine priority mobile source air toxics: 1,3-butadiene, acetaldehyde, acrolein, benzene, diesel particulate matter (diesel PM), ethylbenzene, formaldehyde, naphthalene, and polycyclic organic matter (). In California, sulfates, visibility reducing particles, hydrogen sulfide, and vinyl chloride are also regulated. Criteria Pollutants The Clean Air Act requires the U.S. EPA to set National Ambient Air Quality Standards (NAAQS) for six criteria air contaminants: ozone, particulate matter, carbon monoxide, nitrogen dioxide, lead, and sulfur dioxide. It also permits states to adopt additional or more protective air quality standards if needed. California has set standards for certain pollutants. Table [X] documents the current air quality standards while Table [X] summarizes the sources and health effects of the six criteria pollutants and pollutants regulated in the state of California.
No. days exceeded: Federal 20 ppm 35 ppm # # # # # # # # # # Max 8-hr concentration Conc. Conc. Conc. Conc. Conc. No. days exceeded: State Federal 9.0 ppm 9 ppm # # # # # # # # # # PM10 Max 24-hr concentration Conc. Conc. Conc. Conc. Conc. No. days exceeded: Federal 50 μg/m3 150 μg/m3 # # # # # # # # # # Max annual concentration Conc. Conc. Conc. Conc. Conc. No. days exceeded: State 20 μg/m3 # # # # # PM2.5 Max 24-hr concentration Conc. Conc. Conc. Conc. Conc. No. days exceeded: Federal 35 μg/m3 # # # # # Max annual concentration Conc. Conc. Conc. Conc. Conc. No. days exceeded: State Federal 12 μg/m3 12.0 μg/m3 # # # # # # # # # # Nitrogen Dioxide Max 1-hr concentration Conc. Conc. Conc. Conc. Conc. No. days exceeded: State Federal 0.18 ppm 100 ppb # # # # # # # # # # Max annual concentration Conc. Conc. Conc. Conc. Conc. No. days exceeded: State Federal 0.030 ppm 53 ppb # # # # # # # # # # [X]. Status of SIPs Relevant to the Project Area. Name/Description Status