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Bicycle and Pedestrian Plan Initial Study Less Than S:/gni /cant Potentially Impact With Less Than Significant Mitigation Significant No Issues Impact Incorporated Impact Impact 3. Air Quality Where available, the significance criteria established by the applicable air quality management or air pollution control district may be relied upon to make the following determinations. Would the project: a) Conflict with or obstruct implementation of the applicable X air quality plan? b) Violate any air quality standard or contribute substantially X to an existing or projected air quality violation? c) Result in a cumulatively considerable net increase of any I 1 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)? d) Expose sensitive receptors to substantial pollutant L_i X concentrations? e) Create objectionable odors affecting a substantial number X of people? Background Land uses such as schools, childcare centers, hospitals, convalescent homes, and senior housing are considered to be more sensitive than the general public to poor air quality because the population groups associated with these uses have a greater susceptibility to respiratory distress. Persons engaged in strenuous work or exercise also have a greater sensitivity to poor air quality. Residential areas are considered more sensitive to air quality conditions than commercial and industrial areas, because people generally spend longer periods of time at their residences, resulting in greater exposure to ambient air quality conditions. Recreational uses are also considered sensitive, due to the greater exposure to ambient air quality conditions, and because the presence of pollution detracts from the recreational experience. Significance Criteria The impact questions above constitute the significance criteria for this environmental topic. Also, the significance criteria established by the Bay Area Aix quality Management District (BAAQMD) is used to determine the significance of air quality impacts. Discussion of Checklist Items Less Than Significant: Impact with Mitigation Incorporated. Construction of routes and trails due to implementation of the proposed Master Plan would cause temporary construction dust. With implementation of the mitigation measure listed below, any construction dust related impacts would be less than significant. Less- than Significant Impacts. Adding more pedestrian and bicycle trails would encourage people to walk, jog, ride bicycles, or ride horses along these trails. Although many of the trips on these trails Revised 9/4/09 10 9/4/204)9