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4.1 – Air Quality Draft Environmental Impact Report February 2021 14800 W. Schulte Road Logistics Center 4.1-35 As discussed in Section 4.1.3, criteria air pollutant emissions associated with temporary construction activity were quantified using CalEEMod. Construction emissions were calculated for the estimat ed worst-case day over the construction period associated with each phase and reported as the maximum daily emissions estimated during each year of construction (2021 through 2022). Construction schedule assumptions, including phase type, duration, and sequencing, were based on information provided by the Project applicant and are intended to represent a reasonable scenario based on the best information available. Default values provided in CalEEMod were used where detailed Project information was not available. Implementation of the Project would generate air pollutant emissions from entrained dust, off-road equipment, vehicle emissions, architectural coatings, and asphalt pavement application. Entrained dust results from the exposure of earth surfaces to wind from the direct disturbance and movement of soil, resulting in PM10 and PM2.5 emissions. The Project would implement various dust control strategies (PDF-AQ-1) and would be required to comply with SJVAPCD Regulation VIII to control dust emissions generated during the grading activities. Proposed construction practices that would be employed to reduce fugitive dust emissions include watering of the active sites and unpaved roads three times per day depending on weather conditions , and restricting vehicle speed on unpaved roads to 15 miles per hour. Internal combustion engines used by construction equipment, vendor trucks (i.e., delivery trucks), and worker vehicles would result in emissions of ROGs, NOx, CO, PM10, and PM2.5. The application of architectural coatings, such as exterior application/interior paint and other finishes, and of asphalt pavement would also produce ROG emissions; however, the contractor is required to procure architectural coatings from a supplier in compliance with the requirements of SJVAPCD’s Rule 4601 (Architectural Coatings) and limit the amount of ROG emissions from cutback asphalt in compliance with the requirements of SJVAPCD’s Rule 4641 (Cutback, Slow Cure, and Emulsified Asphalt, Paving and Maintenance Operations). Pursuant to Regulation VIII, Rule 8021, Section 6.3, the Project would be required to develop, prepare, submit, obtain approval of, and implement a dust control plan, which would reduce fugitive dust impacts to less than significant for Project construction. Table 4.1-8 presents the estimated annual construction emissions generated during construction of the Project. Details of the emissions calculations are provided in Appendix B. Table 4.1-8. Estimated Annual Construction Criteria Air Pollutant Emissions - Unmitigated Year ROG NOx CO SOx PM10 PM2.5 Tons per Year 2021 0.09 1.00 0.64 <0.01 0.14 0.09 2022 2.25 0.17 0.23 <0.01 0.02 0.01 Rolling 12-Month Total 2.34 1.17 0.87 <0.01 0.16 0.10 SJVAPCD Threshold 10 10 100 27 15 15 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; <0.01 = reported value less than 0.01. See Appendix B for complete results. 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. As shown in Table 4.1-8, annual construction emissions would not exceed the SJVAPCD significance thresholds for ROG, NOx, CO, sulfur oxides (SOx), PM10, or PM2.5 during construction in all construction years; thus, impacts would be less than significant.