NS-3092 - Zone Change for 1801 East Chestut Ave

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SANTA ANA REZONE PROJECT INITIAL STUDYIMITIGATED NEGATIVE DECLARATION b) Result in a cumulatively considerable net increase of any criteria pollutant for which the project region is nonattainment under an applicable federal or State ambient air quality standard? Less than significant impact. The SCAQMD's thresholds of significance represent the allowable amount of emissions a project can generate without generating a cumulatively considerable contribution to regional air quality impacts. Therefore, a project that would not exceed the SCAQMD thresholds of significance on a project level also would not be considered to result in a cumulatively considerable contribution to these regional air quality impacts.The region is nonattainment for the federal and State ozone standards, nonattainment for the federal and State PM2.5 standards, and nonattainment for State PM,o standards. Impacts related to construction and operations of the proposed project are addressed separately below. Construction Emissions Emissions from construction-related activities are generally short-term in duration but may still cause adverse air quality impacts. The proposed project would generate emissions from construction equipment exhaust, vehicle and truck travel, and fugitive dust. These construction emissions include criteria air pollutants and precursors from the operation of heavy construction equipment. Construction Fugitive Dust The SCAQMD requires all development projects to implement Rule 403—Fugitive Dust in order to ensure that construction-related fugitive dust emissions are considered less than significant. Compliance with this rule is achieved through the application of BACMs. For example, some BACMs that would be required include watering active construction sites three times daily, applying nontoxic chemical soil stabilizers to inactive construction areas, and suspending all grading activities when wind speeds exceed 25 miles per hour(mph). These required measures would help to reduce potential fugitive dust emissions associated with construction activities for the proposed project. Construction emissions were estimated for the activities associated with removal of existing ground materials, site preparation, grading, trenching, installation of the EV charging stations and solar panel structures, and paving. Based on City-provided information, it is expected that construction of the proposed project would be completed in three months (January—March 2027). The construction schedule and off-road construction equipment list can be found in Appendix A. The exhaust emissions generated by construction equipment are based on the hours of operation, horsepower, and load factors of the equipment. The duration of construction activity and associated equipment represent a reasonable approximation of the expected construction fleet as required by CEQA Guidelines. The proposed project's maximum daily construction emissions are shown and compared with the significance thresholds in Table 1. 30 FCS Ordinance No. N4s.=,atlons.sha Pointe Aite/Pubkatlons5ite/Shared Documents/Pubilca6Wons/Client(PN-IN)l9327/o3270M7/ISMND/03270077Santa Ana Remm Prafect 15MN0.doot Page 42 of 118