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AUGUSTIN BERNAL MOUNTAIN BIKE TRAIL PROJECT DRAFT INITIAL STUDY <br /> 12956 <br />DUDEK 26 April 2022 <br />d) Would the project result in other emissions (such as those leading to odors) adversely affecting a <br />substantial number of people? <br />The occurrence and severity of potential odor impacts depends on numerous factors. The nature, <br />frequency, and intensity of the source; the wind speeds and direction; and the sensitivity of <br />receiving location each contribute to the intensity of the impact. Although offensive odors seldom <br />cause physical harm, they can be annoying and cause distress among the public and generate <br />citizen complaints. <br />Potential odors produced during construction would be attributable to concentrations of unburned <br />hydrocarbons from tailpipes of construction equipment, architectural coatings, and asphalt <br />pavement application. In general, odors are highest near the source, but disperse quickly resulting <br />in reduced off-site exposure. Sensitive receptors located adjacent to the project site may be <br />affected. However, construction activities would use typical construction techniques in compliance <br />with Bay Area Air Quality Management District (BAAQMD) rules, and any odors associated with <br />project construction activities would be temporary and would cease upon completion of <br />construction. Therefore, impacts associated with odors during construction would be less than <br />significant. <br />In regards to operations and land use compatibility, odor impacts are addressed qualitatively based <br />on odor screening distances, as recommended by BAAQMD guidance. Certain highly odiferous <br />sources have screening distances of 2 miles. These include wastewater treatment plants, sanitary <br />landfills, and certain industrial facilities (petroleum refineries, asphalt batch plants, and chemical <br />manufacturing). Other odor sources have screening distances of 1 mile and include recycling and <br />waste transfer stations, coffee roasters, and food processing facilities. The project would involve <br />construction of a bike trail, which would not result in sources commonly associated with odors. <br />Therefore, impacts associated with odors generated from operations would be less than significant. <br />Mitigation Measures <br />No mitigation measures are required.