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

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and PM2.5. SCAQMD does not provide an LST for S02 since land use development projects typically result in negligible construction and long-term operation emissions of this pollutant. Since VOCs are not a criteria pollutant, there is no ambient standard or SCAQMD LST for VOCs. Due to the role VOCs play in 03formation, it is classified as a precursor pollutant, and only a regional emissions threshold has been established. LSTs represent the maximum emissions from a project that are not expected to cause or contribute to an exceedance of the most stringent applicable federal or state ambient air quality standard and are developed based on the ambient concentrations of that pollutant for each source receptor area and distance to the nearest sensitive receptor. The mass rate look -up tables were developed for each source receptor area and can be used to determine whether or not a project may generate significant adverse localized air quality impacts. SCAQMD provides LST mass rate look -up tables for projects with active construction areas that are less than or equal to five acres. If the project exceeds the LST look -up values, then the SCAQMD recommends that project -specific air quality modeling must be performed. Please refer to Threshold b below, for the analysis of localized impacts from on -site construction activities. In accordance with SCAQMD guidance, maximum daily emissions of NOx, CO, PM1o, and PM2.5 from on - site sources during each construction activity were compared to LST values for a five -acre site having sensitive receptors within 25 meters (82 feet).14This is appropriate given the 8.97-acre site and the proximity of sensitive receptors immediately north of the Project Site. The Basin is divided into 38 SRAs, each with its own set of maximum allowable LST values for on -site emissions sources during construction and operations based on locally monitored air quality. Maximum on -site emissions resulting from construction activities were quantified and assessed against the applicable LST values. The significance criteria and analysis methodologies in the SCAQMD's CEQA Air Quality Handbook were used in evaluating impacts in the context of the CEQA significance criteria listed below. The SCAQMD localized significance thresholds (LSTs) for NO2i CO, and PM10 were initially published in June 2003 and revised in July 2008.15 The LSTs for PM2.5 were established in October 2006.16 Updated LSTs were published on the SCAQMD website on October 21, 2009.17 Table 4 presents the significance criteria for both construction and operational emissions. 14 South Coast Air Quality Management District, Fact Sheet for Applying CaIEEMod to Localized Significance Thresholds, 2008. 15 South Coast Air Quality Management District, Fact Sheet for Applying CaIEEMod to Localized Significance Thresholds, 2008. 16 South Coast Air Quality Management District, Final — Methodology to Calculate Particulate Matter (PM) 2.5 and PM 2.5 Significance Thresholds, October 2006. 17 South Coast Air Quality Management District, Final Localized Significance Threshold Methodology Appendix C — Mass Rate LST Look -Up Tables, October 21, 2009. Cabrillo Town Center Project PAGE 16 City of Santa Ana Air Quality Iv, `I.0I u C18 — 662 10/3/2023 July 2o2s