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City of San Leandro 14143-14273 Washington Avenue Warehouse Project 40 CO Hotspots CO emissions from traffic generated by the proposed project are a concern at the local level because congested intersections can result in high, localized concentrations of CO referred to as CO hotspots. BAAQMD recommends comparing a project’s attributes with the following screening criteria as a first step to evaluating whether the project would result in the generation of CO concentrations that would substantially contribute to an exceedance of the Thresholds of Significance. The project would result in a less than significant impact to localized CO concentrations if: 1. The project is consistent with an applicable congestion management program established by the county congestion management agency for designated roads or highways, the regional transportation plan, and local congestion management agency plans; 2. The project would not increase traffic volumes at affected intersections to more than 44,000 vehicles per hour; or 3. Project-generated traffic would not increase traffic volumes at affected intersections to more than 24,000 vehicles per hour where vertical and/or horizontal mixing is substantially limited (e.g., tunnel, parking garage, bridge underpass, natural or urban street canyon, below-grade roadway). Based on the Traffic Impact Analysis prepared for the proposed project (Appendix C), the intersection with the most vehicles per hour in the vicinity of the project site would be the Washington Avenue and Halcyon Drive intersection during the PM peak hour. Under the Cumulative Plus Project conditions analyzed in the Traffic Impact Analysis, this intersection would experience 5,017 vehicles per hour. The proposed project would generate an estimated 40 total PM peak-hour trips. Therefore, the proposed project would not cause a nearby roadway segment or intersection to exceed 44,000 vehicles per hour. Localized CO emissions would not be significant. Overall, the proposed project would not expose sensitive receptors to substantial pollutant concentrations and impacts would be less than significant. LESS-THAN-SIGNIFICANT IMPACT d. Would the project result in other emissions (such as those leading to odors) adversely affecting a substantial number of people? During construction activities, heavy equipment and vehicles would emit odors associated with vehicle and engine exhaust and during idling. However, these odors would be intermittent and temporary and would cease upon completion of construction activities, and odors would disperse with distance. Overall, project construction would not generate other emissions, such as those leading to odors, affecting a substantial number of people. Construction-related impacts would be less than significant. Table 5-4 in the BAAQMD 2022 CEQA Air Quality Guidelines provides screening distances for land uses that have the potential to generate substantial odor complaints. The uses in the table include wastewater treatment plants, landfills or transfer stations, refineries, composting facilities, confined animal facilities, food processing facility, smelting plants, and chemical manufacturing facilities (BAAQMD 2022). Warehouse buildings are not included in this list, and operation of the project would not generate other emissions, such as those leading to odors, which would affect a substantial number of people. Furthermore, truck idling at the proposed warehouse would be limited to 5 minutes at any location as required by CARB’s Commercial Vehicle Idling Airborne Toxics