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Partial Recirculated Draft Supplemental Environmental Impact Report (RDSEIR) Conclusions As explained in the Environmental Review Background section above, the documents comprising the RDSEIR (http://www.cityofpleasantonca.gov/idedz) were prepared to update and expand upon analysis in the DSEIR. During the time between publication of the DSEIR and preparation of the RDSEIR, the JDEDZ project description, project details and emissions modeling were refined. As also noted in the Environmental Review Background section, a lawsuit was filed alleging that the DSEIR air quality analysis was inadequate. Among the specific allegations in the lawsuit was a claim that the DSEIR was inadequate because it did not include a quantitative assessment of the proposed project's effects on human health from emissions of toxic air contaminants, particularly those associated with a gas station included in the project. As stated above, the City rescinded the JDEDZ approvals and agreed to undertake supplemental air quality analysis. The initial result of this supplemental analysis was the Health Risk Assessment that was published as part of the RDSEIR. Because a quantitative health risk assessment requires very detailed assumptions to be made concerning project operations and construction, the City and its consultant, along with Costco, thoroughly reviewed the assumptions that had been relied upon in preparation of the 2015 DSEIR. This process generated far more information concerning project operations and construction than had been available for the 2015 DSEIR analysis. Accordingly, following completion of the Health Risk Assessment, the City determined that it was necessary to completely revise the Air Quality Analysis (of criteria pollutants) and the Greenhouse Gas Analysis that were included in the 2015 DSEIR so that the Air Quality and Greenhouse Gas Analyses would be consistent with the new Health Risk Assessment. Finally, the City determined that a quantified Energy Analysis should be prepared that would be consistent with the other three new and revised analyses and would address the fact that the state CEQA Guidelines environmental checklist has been revised to incorporate questions on energy use since publication of the 2015 DSEIR. All of these analyses were presented in the Health Risk Assessment; the Updated Air Quality Analysis Technical Memorandum—Criteria Pollutant Emissions Analysis; the Greenhouse Gas Technical Analysis; and the Energy Analysis Technical Memorandum, collectively the RDSEIR (http://www.cityofpleasantonca.qov/jdedz). In response to comments on the RDSEIR, the air quality modeling of criteria air pollutant was further revised in the RFSEIR. The updated modeling includes revisions to both Phase 2 construction and operational activities and affects the results presented in the Air Quality Analysis Technical Memorandum—Criteria Pollutant Emissions Analysis. These revised results were presented in the RFSEIR published in November 2019 (http://www.cityofpleasantonca.qov/idedz), with the changes from the RDSEIR described in Chapter 4 of the RFSEIR. Differences in conclusions between the 2015 DSEIR and the 2019 RDSEIR and RFSEIR are discussed below. Page 14 of 23