Laserfiche WebLink
Table 8 <br />Daily Operations Emissions <br />Emissions Source <br />Area Sources <br />Daily Emissions (Pounds Per Day) <br />VOC <br />28.6 <br />NOx <br />0.6 <br />CO <br />45.2 <br />Sox PM10 PM2.5 <br /><0.1 0.1 0.1 <br />Energy Sources <br />0.1 <br />1.7 <br />0.8 <br /><0.1 0.1 0.1 <br />Mobile Sources <br />8.5 <br />6.3 <br />74.9 <br />0.2 19.6 5.1 <br />Regional Total <br />37.2 <br />8.6 <br />121.0 <br />0.2 19.8 5.2 <br />Existing Total <br />-12.3 <br />-7.0 <br />-71.4 <br />-0.2 -13.5 -3.6 <br />Net Regional Total <br />24.9 <br />1.6 <br />49.6 <br /><0.1 6.3 1.6 <br />Regional Significance Threshold <br />Exceed Threshold? <br />55 <br />No <br />55 <br />No <br />550 <br />No <br />150 150 55 <br />No No No <br />Net Localized Total 28.7 2.3 46.0 <0.1 0.2 0.2 <br />Localized Significance Threshold <br />N/A <br />183 <br />1,253 <br />N/A 3 2 <br />Exceed Threshold? <br />N/A <br />No <br />No <br />N/A No No <br />LST analyses based on five -acre site with 25-meter distances to receptors in Central Orange <br />County SRA <br />Source: DKA Planning, 2023 based on CaIEEMod 2022.1.1.14 model runs (included in the <br />Technical Appendix). Totals reflect the summer season maximum and may not add up due to <br />rounding. <br />Construction <br />Construction of the Project could expose sensitive receptors to substantial pollutant concentrations if <br />maximum daily emissions of regulated pollutants generated by sources located on and/or near the Project <br />Site exceeded the applicable LST values presented in Table 4, or if construction activities generated <br />significant emissions of TACs that could result in carcinogenic risks or non -carcinogenic hazards exceeding <br />the SCAQMD Air Quality Significance Thresholds of 10 excess cancers per million or non -carcinogenic <br />Hazard Index greater than 1.0, respectively. As discussed above, the LST values were derived by the <br />SCAQMD forthe criteria pollutants NOx, CO, PM1o, and PM2.5 to prevent the occurrence of concentrations <br />exceeding the air quality standards at sensitive receptor locations based on proximity and construction <br />site size. <br />As shown in Table 7, during construction of the Project, maximum daily localized unmitigated emissions <br />of NO2, CO, PM1o, and PM2.5 from sources on the Project Site would remain below each of the respective <br />LST values. Unmitigated maximum daily localized emissions would not exceed any of the localized <br />standards for receptors that are within 25 meters of the Project's construction activities. Therefore, based <br />on SCAQMD guidance, localized emissions of criteria pollutants would not have the potential to expose <br />sensitive receptors to substantial concentrations that would present a public health concern. <br />The primary TAC that would be generated by construction activities is diesel PM, which would be released <br />from the exhaust stacks of construction equipment. The construction emissions modeling conservatively <br />assumed that all equipment present on the Project Site would be operating simultaneously throughout most <br />of the day, while in all likelihood this would rarely be the case. Average daily emissions of diesel PM would <br />be less than one pound per day throughout the course of Project construction. Therefore, the magnitude of <br />Cabrillo Town Center <br />Air Quality ac77ca <br />PAGE 30 <br />18-676 <br />City of Santa Ana <br />10/3/2023 July 2023 <br />