Laserfiche WebLink
4.3 AIR QUALITY <br />4.3-1 <br /> <br /> <br />This section has been prepared using methodologies and assumptions recom- <br />mended in the air quality impact assessment guidelines of the Northern Sierra <br />Air Quality Management District (NSAQMD).1 In keeping with these guide- <br />lines, this section describes existing air quality in Truckee and the Nevada <br />County Area, impacts of future traffic on project related vehicular emissions <br />that have regional effects, impacts from project construction emissions, and <br />other effects of the project related to air quality. Mitigation measures to re- <br />duce or eliminate potentially significant air quality impacts are identified, <br />where appropriate. <br /> <br /> <br />A. Regulatory Framework <br />Both the State and federal governments have established health-based Ambi- <br />ent Air Quality Standards for six air pollutants: carbon monoxide (CO), <br />ozone (O3), nitrogen dioxide (NO2), sulfur dioxide (SO2), lead (Pb), and sus- <br />pended particulate matter (PM). These are the most prevalent air pollutants <br />and have extensive documented health effects, and are commonly referred to <br />as “criteria air pollutants.” Unlike air toxics, all criteria pollutants share three <br />regulatory characteristics: 1) a specified compound, 2) a regulated maximum <br />allowable concentration, and 3) a specified time period of exposure. In addi- <br />tion, the State has set standards for sulfates, hydrogen sulfide, vinyl chloride, <br />and visibility reducing particles. These standards are designed to protect the <br />health and welfare of the populace with a reasonable margin of safety. <br /> <br />At the federal level, EPA has been charged with implementing national air <br />quality programs. EPA’s air quality mandates are drawn primarily from the <br />Federal Clean Air Act (FCAA), which was enacted in 1963. The FCAA was <br />amended in 1970, 1977, and 1990. <br /> <br /> <br />1 Northern Sierra Air Quality Management District, 2009. Guidelines for As- <br />sessing and Mitigating Air Quality Impacts of Land Use Projects.