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Initial Study and Negative Declaration <br />receptor or a new source of TACs. As the proposed development would be <br />located in close proximity to 1 -580, Hopyard Road and Owens Drive, a health <br />risk screening memorandum for the proposed development was prepared <br />by FirstCarbon Solutions? dated October 14, 2013. Although BAAQMD does <br />not require such an analysis for outdoor restaurant uses (as restaurant <br />customers are not considered a sensitive population), a health risk study was <br />prepared for the project in order to cautiously evaluate potential health risks <br />that could occur due to the site's proximity to Interstate 580, which is a high - <br />volume freeway. The health risk screening was prepared following BAAQMD <br />recommendations as contained in the Recommended Methods for <br />Screening and Modeling Local Risks and Hazards version 3.0, published May <br />2012. The health risk screening analyzed the proposed development in <br />relation to BAAQMD thresholds, toxic air contaminants and health concerns. <br />The memorandum concluded that proposed restaurant customers would <br />not be considered sensitive receptors. Furthermore, health risk levels at the <br />site would not reach levels that would be considered significant even for <br />residential occupants. Construction activities would temporarily generate <br />TACs (e.g., construction equipment fueled by diesel which emits diesel <br />particulate matter) that could affect sensitive receptors in the project <br />vicinity. However, such emissions would be reduced to less than significant <br />levels with the implementation of standard best practice construction <br />management measures that would be required as conditions of project <br />approval. As a result, the project would have a less- than - significant impact <br />related to the exposure of sensitive receptors to air pollutants. <br />e. Diesel exhaust fumes would be generated by equipment during demolition <br />and construction. Diesel fumes would result in odors that may be <br />perceptible to hotel guests and business tenants in the immediate vicinity of <br />the project site. However, diesel odors would dissipate within a short <br />distance from the project site. Therefore, diesel odors would not be <br />expected to adversely impact the surrounding hotel guests and business <br />tenants. Food preparation may generate odors which may be <br />objectionable to some surrounding tenants. Conditions of approval would <br />require the applicant to install filtering devices in the exhaust fans that would <br />minimize odors. Therefore, the project would result in a Tess- than - significant- <br />impact. <br />5.4. BIOLOGICAL RESOURCES <br />ENVIRONMENTAL SETTING <br />The proposed Chick -fil -A site is urbanized and contains a total of 34 trees of five <br />species: three coast live oak, nine coast redwood, 10 Holly oak, three white alder, <br />and nine eucalyptus trees. Of the 34 surveyed trees, 16 are heritage trees. No <br />21 <br />