2019-040 - Mainplace Mall Transformation

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City of Santa Ana Addendum to the MainPlace Mall Transformation Proiect Fashion Square Commercial Center Final EIR than what was anticipated in both the 1983 EIR and the 1996 Addendum, and no new construction impacts would occur. Localized Construction Air Quality Construction is temporary, would be transient throughout the site (i.e., move from location to location), and would not generate emissions in a fixed location for extended periods of time. Construction would be subject to and would comply with California regulations limiting the idling of heavy-duty construction equipment to no more than 5 minutes to further reduce nearby sensitive receptors' exposure to temporary and variable diesel particulate matter emissions. For these reasons, diesel particulate matter emissions generated by construction activities, in and of itself, would not be expected to expose sensitive receptors to substantial amounts of air toxics and the Project would have a less than significant impact. No new impact would occur. Although the closest sensitive receptors are located approximately 300 feet from the property line of the Project, construction would not occur at the property line, but would be setback approximately 300 feet the property line that is closest to the sensitive receptors. Therefore, the receptors would be located approximately 600 feet from the closest active construction zone. According to the CARB Air Quality and Land Use Handbook (2005), pollutant concentrations drop off drastically with distance (i.e., a 70 percent drop off in pollutant concentrations at 500 feet from the source). Additionally, construction equipment and vehicles in general have become cleaner and release less emissions than when the 1983 EIR was certified and when the 1996 Addendum was adopted. As a result, construction emissions would be lower than what was anticipated in both the 1983 EIR and the 1996 EIR, and no new impacts would occur. Regional Operations Air Quality The proposed Project would adjust the land use at buildout of the Project site by reducing commercial and office space by 859,255 square feet and providing for development of up to 1,900 residential units. Table AQ-1 compares the proposed Project emissions with those listed in the 1983 EIR. As shown, the operational emissions from the proposed Project would be far lower than what was identified in the 1983 EIR. Table AQ-1: Comparison of Operational Emissions Identified in the 1983 EIR and the Proposed Project Source ROG NO: CO S02 PM10 PM2.e Proposed Project 184.63 258.70 772.47 1.78 136.31 39.0 5 5 Emissions Listed in the 710 2,489.10 11,994.70 190 305.43 n/a2 1983 Project EIR Difference -525 -2,230 -11,222 -188 -169 n/a3 SCAQMD Threshold 55 55 550 150 150 55 Source: Air C,luality Assessment, 2U1y 114