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Ponderosa Homes at 6900 Valley Trails Drive Initial Study and Negative Declaration or conversion of forest land will occur as a result of the project. Therefore, the project would result in no impact with respect to agricultural resources. 5.3. AIR QUALITY Less Than Significant Potentially Impact With Less Than Significant Mitigation Significant No Issues Impact Incorporated Impact Impact Would the project: a) Conflict with or obstruct implementation of the X applicable air quality plan? b) Result in a cumulatively considerable net increase X of any criteria pollutant for which the project region is non-attainment under an applicable federal or state ambient air quality standard (including releasing emissions, which exceed quantitative thresholds for ozone precursors)? c) Violate any air quality standard or contribute X substantially to an existing or projected air quality violation? d) Expose sensitive receptors to substantial pollutant X concentrations? e) Create objectionable odors affecting a X substantial number of people? ENVIRONMENTAL SETTING The Bay Area has remained one of the least-lolluted of the five major urban California air basins in recent years; however, there are still several days annually when air pollution exceeds the federal and state air quality standards. These standards, set at different concentrations for each of the major air pollutants, have been developed to protect public health. The Bay Area Air Quality Management District (BAAQMD) regulates air quality in the Bay Area Region through its permit authority over most stationary emission sources and through its planning and review activities. The BAAQMD is the permitting agency for air pollutant sources. In May 2011, the updated BAAQMD CEQA Air Quality Guidelines were amended to include a risk and hazards threshold for new receptors and modified procedures for assessing impacts related to risk and hazard impacts. These standards are the subject of ongoing litigation as of the preparation 14