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emissions would be significant and unavoidable. Furthermore, regarding the Approved Project's <br />operational criteria air pollutant emissions, the 2018 DSEIR states: <br />"[S]imilar to the conclusion in the MEMU EIR, operational sources under the proposed project <br />would result in a significant and unavoidable air quality impact associated with VOCs, NOX, CO, <br />PM10 and PM2.5 emissions.1 Therefore, this impact would be significant and unavoidable. No <br />feasible mitigation is available" (emphasis added) (p. 4-12). <br />As you can see in the excerpt above, the 2018 DSEIR concludes no feasible mitigation is available to <br />reduce the Project's operational criteria air pollutant emissions, and the impact would be significant and <br />unavoidable. <br />However, the Staff Report's reliance on the 2018 DSEIR's air quality impact significance determination is <br />incorrect, as additional, feasible mitigation measures exist that were not considered that would <br />substantially reduce the Project's criteria pollutant emissions. According to CEQA Guidelines section <br />15162: <br />"(a) When an EIR has been certified or a negative declaration adopted for a project, no <br />subsequent EIR shall be prepared for that project unless the lead agency determines, on the <br />basis of substantial evidence in the light of the whole record, one or more of the following: <br />(3) New information of substantial importance, which was not known and could not have <br />been known with the exercise of reasonable diligence at the time the previous EIR was <br />certified as complete or the negative declaration was adopted, shows any of the following: <br />(C) Mitigation measures or alternatives previously found not to be feasible would in fact be <br />feasible and would substantially reduce one or more significant effects of the proiect, but the <br />project proponents decline to adopt the mitigation measure or alternative; or <br />(D) Mitigation measures or alternatives which are considerably different from those <br />analyzed in the previous EIR would substantially reduce one or more significant effects on <br />the environment, but the project proponents decline to adopt the mitigation measure or <br />alternative" (emphasis added). <br />As the above excerpt demonstrates, if additional mitigation measures are found to be feasible for the <br />proposed Project that were not incorporated in the 2018 DSEIR, a subsequent EIR should be prepared. <br />Here, there are numerous additional mitigation measures available that would reduce the Project's <br />construction -related and operational criteria air pollutant emissions. <br />Namely, while the 2018 DSEIR includes MM-AQ-1, which requires off -road construction equipment to <br />meet Tier 4 standards, the 2018 DSEIR fails to acknowledge the possibility of requiring off -road <br />construction equipment to meet the more efficient Tier 4 Final standards (p. ES-15, Table ES-2). <br />Furthermore, additional mitigation measures that would reduce the Project's construction -related <br />criteria air pollutant emissions can be found in from NEDC's Diesel Emission Controls in Construction <br />3 <br />