11A Public Hearings - Laserfiche WebLink

Home

Environmental Checklist Air Quality Environmental Consistency Checklist Pursuant to CEQA Guidelines Section 15183 31 Table 8 Project Operational Maximum Annual Emissions Sources Maximum Annual Emissions (tons/year) ROG NOX CO PM10 PM2.5 SOX Area 0.2 <0.1 0.1 <0.1 <0.1 <0.1 Energy <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 Mobile <0.1 0.4 0.7 0.3 <0.1 <0.1 Total Project Emissions 0.2 0.5 0.9 0.3 <0.1 0.1 BAAQMD Thresholds 10 10 N/A 15 10 N/A Threshold Exceeded? No No N/A No No N/A Source: Appendix AQ, CalEEMod worksheet Table 2.2 “Overall Operational-Unmitigated” annual emissions. Numbers may not add up due to rounding. N/A = not applicable; no BAAQMD threshold for CO or SOX Table 7 and Table 8 show that emissions would not exceed BAAQMD daily or annual thresholds for any criteria pollutant. With regard to potential localized CO impacts, BAAQMD recommends a screening analysis to determine whether a project has the potential to contribute to a CO hotspot due to CO emissions from traffic (BAAQMD 2017a). The project would result in less than significant impacts to air quality for local CO emissions if all of the following screening criteria are met: The project is consistent with an applicable congestion management program established by the county congestion management agency for designated roads or highways, regional transportation plan, and local congestion management agency plans; and The project traffic would not increase traffic volumes at affected intersections to more than 44,000 vehicles per hour; and The project 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). As discussed further in Section 17, Transportation, and in the Trip Generation and VMT Analysis report for the project, it was determined that the proposed project would not conflict with an applicable congestion management plan or cause an increase in traffic that would cause intersections to exceed 44,000 vehicles per hour (Appendix TRA). Adjacent roadways that would receive new vehicle trips generated by the project do not include roadway segments where vertical or horizontal atmospheric mixing is substantially limited (Appendix AQ). Therefore, the project would not exceed the CO screening criteria. Consequently, operational impacts would be less than significant. c.Would the project expose sensitive receptors to substantial pollutant concentrations? Diesel particulate matter accounts for 60 percent of the current estimated inhalation cancer risk for background ambient air (CARB 2017). In addition, Toxic Air Contaminants (TAC) are a defined set of air pollutants that may pose a present or potential hazard to human health (CARB 2021). Unlike criteria pollutants, there is no safe level of exposure associated with TAC emissions. Common sources of TACs and PM2.5 include gasoline stations, dry cleaners, diesel backup generators, truck distribution centers, freeways, and other major roadways (BAAQMD 2017c). The project does not