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34• Transportation/Traffic • Utilities /Service Systems F. Significant Cumulative Impacts Air Quality (DEIR) a) Facts /Effects: (1) Emissions of Criteria Pollutants (Construction). During certain phases of construction of Option 1 and Option 2 of the proposed project, maximum daily emissions of volatile organic compounds (VOC) emissions would exceed SCAQMD significance thresholds, resulting in the violation of an air quality standard. SCAQMD significance thresholds for other criteria pollutants would not be exceeded. Mitigation measures MM4.1 -1 to MM4.1 -16 intended to improve air quality emissions generated by construction activities associated with the proposed project would reduce VOC emissions but not to levels below the SCAQMD significance threshold. Because VOC emissions, a precursor for ozone for which the Basin is currently in nonattainment, would exceed SCAQMD significance thresholds during construction of Option 1 and Option 2 of the proposed project, the emissions generated by construction of the proposed project would be cumulatively considerable and would constitute a substantial contribution to an existing or projected air quality violation. Therefore, a significant and unavoidable cumulative impact would occur and no additional feasible mitigation is available. b) Mitigations: Refer to mitigation measures MM4.1 -1 through MM4.1 -16 provided above. C) Finding: The City Council finds that the cumulative air quality impact cannot be mitigated to a less- than - significant level and a significant and unavoidable cumulative impact would occur, as identified in the FEIR. 2. Operational Noise (DEIR) a) Facts /Effects: (1) Excessive Exterior Noise Levels. The proposed project site and the surrounding area is located within the noise impact boundary for LAX. Consequently future residents of the proposed project would be exposed to existing exterior noise levels that exceed established standards for residential uses. Additional residential development within the noise impact boundary for LAX may occur in the future resulting in the exposure of additional residents to excessive exterior noise levels. No mitigation is 24