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ER No. 2018-72, AA No. 2018-04, DA No. 2018-02, & TPM No. 2018-01, — MainPlace <br />Transformation Project <br />June 4, 2019 <br />Page 11 <br />ENVIRONMENTAL IMPACT <br />The MainPlace Transformation Project required preparation of studies relating to traffic, noise, air <br />quality, greenhouse gas emissions, geologic and seismic hazards, hydrology and hydraulics, and <br />sewer capacity. In addition, a health risk assessment, water supply assessment, water quality <br />management plan, and fiscal impact and economic benefit analysis were prepared. All studies <br />evaluate the changes of the proposed revisions as compared to the existing entitlements and were <br />reviewed for content and accuracy by the City. The technical studies evidenced that an EIR <br />Addendum to the previously -certified 1983 EIR is the appropriate CEQA document to evaluate and <br />disclose the project's impacts. <br />An addendum to a previously certified EIR is prepared when a lead agency is asked to approve <br />modifications to an existing project for which an EIR has already been certified. An addendum <br />evaluates the requested modifications and determines whether subsequent EIR review is <br />required. Pursuant to CEQA case law, an addendum applies the same thresholds as the original, <br />certified EIR. (Citizens Against Airport Pollution v. City of San Jose (2014) 227 Cal.AppAth 788.) <br />Moreover, pursuant to Public Resources Code section 21166 and State CEQA Guidelines <br />section 15162, when an EIR has been certified for a project, the City shall not require a <br />subsequent or supplemental EIR or negative declaration for the project unless the lead agency <br />determines that one or more of the following conditions are met: <br />1. Substantial project changes proposed that would result in new or substantially more <br />severe impacts than disclosed in the previous EIR; <br />2. Substantial changes in circumstances that would result in new or substantially more <br />severe impacts than disclosed in the previous EIR; or <br />3. Significant new information has come to light that shows there will be new or substantially <br />more severe impacts than disclosed in the previous EIR. <br />If some changes or additions to the previously prepared EIR are necessary, but none of the <br />conditions specified above are met, the lead agency shall prepare an Addendum. In accordance <br />with the State CEQA Guidelines, since none of the conditions specified in section 15162 are <br />present, an Addendum to the previously certified 1983 EIR is the appropriate form of <br />environmental review for the MainPlace Transformation Project. <br />The Addendum focuses on the potential environmental impacts associated with the MainPlace <br />Transformation Project that might cause a change in the conclusions of the certified 1983 EIR, <br />including changes in circumstances or new information of substantial importance that would <br />substantially change those conclusions. The Addendum considers whether the project result in <br />new or substantially more severe impacts than were disclosed in the 1983 EIR and finds that no <br />supplemental or subsequent EIR is required for the MainPlace Transformation Project. <br />Pursuant to State CEQA Guidelines section 15164(b), an addendum to a previously -certified EIR <br />is not circulated for public review. The Addendum is included with this staff report as Attachment <br />75D-11 <br />