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South Coast Technology Center Project <br />CEQA Exemption 15183 <br />Table 4.3-2 <br />Operational Criteria Pollutant Emissions <br />Emissions Source <br />Pollutant (pounds/day)' <br />ROG NOx CO SOx PM10 PMz.s <br />Existing Summer Emissions <br />Mobile <br />6.41 <br />4.59 <br />50.50 <br />0.12 <br />10.90 <br />2.82 <br />Area <br />6.65 <br />0.12 <br />14.50 <br />< 0.005 <br />0.03 <br />0.02 <br />Energy3 <br />0.07 <br />1.21 <br />1.02 <br />0.01 <br />0.09 <br />0.09 <br />Total Existing Summer <br />Emissions° <br />13.10 <br />5.92 <br />66.00 <br />0.13 <br />11.00 <br />2.93 <br />Project Summer Emissions <br />Mobile <br />2.85 <br />26.30 <br />33.90 <br />0.28 <br />14.70 <br />4.11 <br />Area <br />9.73 <br />0.12 <br />14.10 <br />< 0.005 <br />0.03 <br />0.02 <br />Energy3 <br />0.00 <br />0.00 <br />0.00 <br />0.00 <br />0.00 <br />0.00 <br />Total Project Summer Emissions° <br />12.60 <br />26.40 <br />48.00 <br />0.28 <br />14.70 <br />4.13 <br />Net Increase From Existing <br />Conditions <br />-0.50 <br />20.48 <br />-18.00 <br />0.15 <br />3.70 <br />1.20 <br />SCAQMD Threshold <br />55 <br />55 <br />550 <br />150 <br />150 <br />55 <br />Threshold Exceeded? <br />No <br />No <br />No <br />No <br />No <br />No <br />Existing Winter Emissions <br />Mobile <br />6.34 <br />4.99 <br />47.30 <br />0.11 <br />10.90 <br />2.82 <br />Area <br />4.28 <br />0.00 <br />0.00 <br />0.00 <br />0.00 <br />0.00 <br />Energy <br />0.07 <br />1.21 <br />1.02 <br />0.01 <br />0.09 <br />0.09 <br />Total Existing Winter <br />Emissions° <br />10.70 <br />6.20 <br />48.30 <br />0.12 <br />11.00 <br />2.91 <br />Project Winter Emissions <br />Mobile <br />2.82 <br />27.40 <br />32.00 <br />0.28 <br />14.70 <br />4.11 <br />Area <br />7.41 <br />0.00 <br />0.00 <br />0.00 <br />0.00 <br />0.00 <br />Energy3 <br />0.00 <br />0.00 <br />0.00 <br />0.00 <br />0.00 <br />0.00 <br />Total Project Winter Emissions° <br />10.20 <br />27.40 <br />32.00 <br />0.28 <br />14.70 <br />4.11 <br />Net Increase From Existing <br />Conditions <br />-0.50 <br />21.20 <br />-16.30 <br />0.16 <br />3.70 <br />1.20 <br />SCAQMD Threshold <br />55 <br />55 <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 calculated using CalEEMod Version 2022.1. <br />2. Operational trips based on the Trip Generation Assessment prepared by Linscott, Law & Greenspan Engineers (dated January <br />2, 2024). <br />3. According to the Project applicant, the Project would not consume natural gas. <br />4. Totals may not add precisely due to rounding. <br />Source: Refer to Appendix A of Attachment A, Air Quality Assessment, for CalEEMod outputs and assumptions used in this <br />analysis. <br />Air Quality Health Impacts <br />Adverse health effects induced by criteria pollutant emissions are highly dependent on a multitude <br />of interconnected variables (e.g., cumulative concentrations, local meteorology and atmospheric <br />conditions, and the number and character of exposed individual [e.g., age, gender]). In particular, <br />ozone (03) precursors, VOCs and NOx, affect air quality on a regional scale. Health effects related <br />to 03 are therefore the product of emissions generated by numerous sources throughout a region. <br />Existing models have limited sensitivity to small changes in criteria pollutant concentrations and, <br />as such, translating project -generated criteria pollutants to specific health effects or additional <br />days of nonattainment would produce meaningless results. In other words, the Project's less than <br />significant increases in regional air pollution from criteria air pollutants during construction would <br />have negligible impacts on human health. <br />July 2024 Page 25 <br />