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South Coast Technology Center Project <br />CEQA Exemption 15183 <br />would comply with RR AQ-2 to limit idling of construction equipment to less than five minutes. The <br />analysis of construction criteria pollutant emissions has been prepared utilizing the California <br />Emissions Estimator Model (CaIEEMod) version 2022.1.E Table 4.3-1, Construction Criteria <br />Pollutant Emissions, summarizes the estimated maximum daily emissions of VOC (ROG), NOx, <br />CO, S02, PM1o, and PM2.5. As shown in Table 4.3-1, the daily total construction emissions would <br />not exceed established SCAQMD thresholds. Therefore, impacts would be less than significant. <br />Table 4.3-1 <br />Construction Criteria Pollutant Emissions <br />Pollutant (pounds/day)' <br />2 <br />Construction Phase (Year) <br />ROG <br />NOx <br />CO <br />S02 <br />PM10 <br />PM2.5 <br />Demolition (2024) <br />2.75 <br />29.21 <br />24.39 <br />0.05 <br />4.71 <br />1.7 <br />Grading (2024) <br />3.63 <br />36.89 <br />32.3 <br />0.07 <br />4.63 <br />2.5 <br />Building Construction (2024) <br />1.75 <br />13.71 <br />21.12 <br />0.03 <br />2.76 <br />1.02 <br />Building Construction (2025) <br />1.66 <br />12.77 <br />21.52 <br />0.03 <br />2.68 <br />0.96 <br />Paving (2025) <br />2.85 <br />7.51 <br />10.71 <br />0.01 <br />0.55 <br />0.37 <br />Architectural Coating (2025) <br />71.03 <br />0.99 <br />2.46 <br />< 0.01 <br />0.39 <br />0.11 <br />Maximum Daily Emissions3 <br />71.03 <br />50.6 <br />53.42 <br />0.10 <br />7.39 <br />3.52 <br />SCAQMD Significance Thresholds <br />75 <br />100 <br />550 <br />150 <br />150 <br />55 <br />Threshold Exceeded? <br />No <br />No <br />No <br />No <br />No <br />No <br />Notes: <br />1. Emissions were calculated using CaIEEMod version 2022.1. Higher emissions between summer and winter are presented <br />as a conservative analysis. <br />2. Modeling assumptions include compliance with SCAQMD Rule 403 which requires: properly maintain mobile and other <br />construction equipment; replace ground cover in disturbed areas quickly; water exposed surfaces three times daily; cover <br />stockpiles with tarps; water all haul roads twice daily; and limit speeds on unpaved roads to 15 miles per hour. <br />3. Grading and building construction phases would overlap in 2024. As such, maximum daily emissions for all pollutants except <br />for ROG are the total of grading phase and building construction phase emissions in 2024. Totals may be slightly off due to <br />rounding. <br />Source: Refer to Appendix A of Attachment A, Air Quality Assessment, for CaIEEMod outputs and assumptions used in this <br />analysis. <br />With respect to the proposed Project's construction -period air quality emissions and cumulative <br />Basin -wide conditions, the SCAQMD has developed strategies to reduce criteria pollutant <br />emissions outlined in the 2022 AQMP. The proposed Project would comply with SCAQMD Rule <br />403 requirements and implement all feasible SCAQMD rules to reduce construction air emissions <br />to the extent feasible. In addition, the proposed Project would comply with adopted 2022 AQMP <br />emissions control measures. Pursuant to SCAQMD rules and mandates, as well as the CEQA <br />requirement that significant impacts be mitigated to the extent feasible, these same requirements <br />(i.e., Rule 403 compliance, implementation of all feasible mitigation measures, and compliance <br />with adopted AQMP emissions control measures) would also be imposed on construction projects <br />throughout the Basin, which would include related projects. <br />s Modeling was performed for a project with three industrial buildings totaling 325,044 square feet. However, since <br />the completion of the modeling, the total building square footage has been reduced to 313,244 square feet. <br />Therefore, Project emissions are conservative. <br />July 2024 Page 23 <br />