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4.1 – Air Quality Draft Environmental Impact Report February 2021 14800 W. Schulte Road Logistics Center 4.1-37 Table 4.1-10. Estimated Maximum Daily Construction and Operational Criteria Air Pollutant Emissions - Unmitigated Year ROG NOx CO SOx PM10 PM2.5 Pounds per Day Construction 2021 4.23 46.82 31.12 0.06 9.10 5.76 Construction 2022 72.15 18.94 19.43 0.03 0.98 0.87 Maximum Daily Construction Emissions 72.15 46.82 31.12 0.06 9.10 5.76 Maximum Daily Operational Emissions 21.43 51.85 68.03 0.12 2.76 1.63 SJVAPCD Threshold 100 100 100 100 100 100 Threshold Exceeded? No No No No No No Notes: ROG = reactive organic gas; NOx = oxides of nitrogen; CO = carbon monoxide; SOx = sulfur oxides; PM10 = coarse particulate matter; PM2.5 = fine particulate matter; SJVAPCD = San Joaquin Valley Air Pollution Control District See Appendix B for complete results. The values shown are the maximum summer or winter daily emissions results from CalEEMod. These emissions reflect CalEEMod “mitigated” output, which accounts for compliance with SJVAPCD’s Rule 4601 (Architectural Coatings) and implementation of the Project’s fugitive dust control strategies, including watering of the Project site and unpaved roads three times per day, and restricting vehicle speed on unpaved roads to 15 miles per hour. Construction mobile source emissions assumed to travel 0.45 miles on site and 0.25 miles off site. Operational mobile source emissions assumed to travel 0.45 miles on site and 0.25 miles off site. As indicated in Table 4.1-10, the Project would not exceed 100 pounds per day on site for ROG, NOx, CO, SOx, PM10, or PM2.5 during construction or operation; therefore, the Project’s localized criteria air pollutant impacts would be less than significant. Health Effects Operation of the Project would result in emissions that would exceed the SJVAPCD threshold for NO x. Project construction and operation would not exceed SJVAPCD thresholds for ROG, CO, SOx, PM10, or PM2.5, and construction would not exceed the SJVAPCD threshold for NOx. ROGs and NOx are precursors to O3, for which the SJVAB is designated as nonattainment with respect to the NAAQS and CAAQS. The health effects associated with O3 are generally associated with reduced lung function. The contribution of ROGs and NOx to regional ambient O3 concentrations is the result of complex photochemistry. The increases in O3 concentrations in the SJVAB due to O3 precursor emissions tend to be found downwind from the source location to allow time for the photochemical reactions to occur. However, the potential for exacerbating excessive O3 concentrations would also depend on the time of year that the ROG emissions would occur because exceedances of the O3 CAAQS/NAAQS tend to occur April through October when solar radiation is highest. The holistic effect of a single project’s emissions of O3 precursors is speculative due to the lack of quantitative methods to assess this impact. Because operation of the Project would exceed the SJVAPCD threshold for NOx, implementation of the Project could contribute to regional O3 concentrations and the associated health effects. Operation of the Project would contribute to exceedances of the NAAQS and CAAQS for NO2. Health effects that result from NO2 and NOx include respiratory irritation, which could be experienced by nearby receptors during the periods of heaviest use of off-road construction equipment. However, Project construction would be relatively short term, and off-road construction equipment would be operating at various portions of the site and would not be concentrated in one portion of the site at any one time. In addition, existing NO2 concentrations in the area are well below the NAAQS and CAAQS standards. Due to exceedances in operation-generated emissions of NOx, the Project could result in potential health effects associated with NO2 and NOx.