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Draft Supplemental Environmental Impact Report Page IV.D-31 Forward Inc. Landfill 2018 Revised Project increased daily acceptance rate [above existing actual emissions], as a result of the project) ' would contribute to overall ozone nonattainment in the region and would be considered a cumulatively considerable contribution to the existing significant cumulative impact in the SJVAB. PM,o impacts are assessed by determining exposure to sensitive receptors near the project site from earth disturbing activities from the current project and any nearby projects that may occur at the same time. According to SJVAPCD GAMAQI,if the level of earth disturbing activity may cause an adverse impact, enhanced dust control measures should be included to reduce the impact to less than significant levels. Thus,with Mitigation Measure D.2a. and D.2b.,the project-level impacts of PM,o from the project would be less than significant. However,the project would contribute to the overall PM,o nonattainment within the region. Because the project would result in PM,o emissions from traffic and operations every day (due to the extended years of landfill operations as a result of the project),the project's emissions would be considered a cumulatively considerable contribution to the existing significant cumulative impact in the SJVAB. In recent years, CO measurements are well below AAQS due to the retirement of older polluting vehicles, less emissions from new vehicles, and improvements in fuels.As a result,no future violations of the CO standard are anticipated from the project and any cumulative project in the vicinity. The cumulative CO impact would be less than significant. TAC emissions were found to be well below the SJVAPCD thresholds for incremental cancer risk and non-carcinogenic acute and chronic risks(see Section IV.E., Public Health and Safety, Impact E.8.). Thus,the project's increased TAC emissions would not result in a significant cumulative impact. As determined in Impact DA., cumulative GHG emissions would be a significant impact prior to mitigation. The project would extend the lifetime of the landfill, adding years of emissions of ozone precursors and PM,o that would otherwise not occur without the project.Therefore,the project's emissions of ozone precursors and PM,o would be considered a cumulatively considerable contribution to the existing significant cumulative air quality impact in the SJVAB. With the incorporation of Mitigation Measures D.1.,D.2a.,D.2b., and DA., the individual project impacts would be less than significant. Nevertheless,the cumulative impact to air quality (ozone precursors and PMJ from the project would be significant. Mitigation Measure D.S. Revises 2013 EIR Mitigation Measure D.6. : Implement Mitigation Measures D.1,D.2a,D.2b and DA. ' With mitigation, the project would still have increased emissions(though the increased project emissions would be less than the project-level significance thresholds with mitigation) and these emissions would be a cumulatively considerable contribution to the cumulative air quality impacts in the SJVAB, and thus significant and unavoidable. 1 1