Item 18 - Appeal Application Nos. 2023-02 and 2023-03 for Cabrillo Town Center project

Home Browse Search

Table 3 Existing Daily Operations Emissions Area Sources 5.4 0.1 7.5 <0.1 <0.1 <0.1 Energy Sources Mobile Sources 0.1 6.9 1.2 5.7 1.0 62.9 <0.1 0.1 0.1 0.2 13.4 3.5 Regional Total 12.3 7.0 71.4 0.2 13.5 3.6 Source: DKA Planning, 2023 based on CaIEEMod 2022.1.1.14 model runs, Summer season (included in Project Impacts Methodology The air quality analysis conducted for the Project is consistent with the methods described in the SCAQMD CEQA Air Quality Handbook (1993 edition), as well as the updates to the CEQA Air Quality Handbook, as provided on the SCAQMD website. The SCAQMD recommends the use of the California Emissions Estimator Model (CaIEEMod, version 2022.1.1.14) as a tool for quantifying emissions of air pollutants that will be generated by constructing and operating development projects. The analyses focus on the potential change in air quality conditions due to Project implementation. Air pollutant emissions would result from both construction and operation of the Project. Specific methodologies used to evaluate these emissions are discussed below. Construction. Sources of air pollutant emissions associated with construction activities include heavy- duty off -road diesel equipment and vehicular traffic to and from the Project construction site. Project - specific information was provided describing the schedule of construction activities and the equipment inventory required from the Applicant. Details pertaining to the schedule and equipment can be found in the Technical Appendix to this analysis. The CaIEEMod model provides default values for daily equipment usage rates and worker trip lengths, as well as emission factors for heavy-duty equipment, passenger vehicles, and haul trucks that have been derived by the CARB. Maximum daily emissions were quantified for each construction activity based on the number of equipment and daily hours of use, in addition to vehicle trips to and from the Project Site. The SCAQMD recommends that air pollutant emissions be assessed for both regional scale and localized impacts. The regional emissions analysis includes both on -site and off -site sources of emissions, while the localized emissions analysis focuses only on sources of emissions that would be located on the Project Site. Localized impacts were analyzed in accordance with the SCAQMD Localized Significance Threshold (LST) methodology. 12 The localized effects from on -site portion of daily emissions were evaluated at sensitive receptor locations potentially impacted by the Project according to the SCAQMD's LST methodology, which uses on -site mass emission look -up tables and Project -specific modeling, where appropriate.13 SCAQMD provides LSTs applicable to the following criteria pollutants: NOx, CO, PM10, 12 South Coast Air Quality Management District, Final Localized Significance Methodology, revised July 2008. 13 South Coast Air Quality Management District, LST Methodology Appendix C-Mass Rate LST Look -Up Table, October 2009. Cabrillo Town Center Air Quality ac77ca PAGE15 18-661 City of Santa Ana 10/3/2023 July 2023