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Administrative Draft Environmental Impact Report Gill Medical Center Project significance criteria. Under CEQA, these criteria (sometimes called thresholds of significance) are used to make a determination of significance for each environmental impact evaluated.An adverse impact that exceeds or crosses the significance criteria is considered significant, and an impact that does not exceed or cross the criteria is considered less than significant.The CEQA significance criteria used in this Draft EIR are based on CEQA's mandatory findings of significance (as summarized in State CEQA Guidelines Section 15065); the checklist presented in Appendix G of the State CEQA Guidelines in effect when the Draft EIR was prepared; and where appropriate, factual or scientific data and regulatory standards of federal, state, and local agencies. For CEQA purposes, impacts in this Draft EIR are classified as: Less than significant - A project impact is considered less than significant if it would not exceed the threshold of significance and therefore would not cause a substantial adverse change in the environment. No mitigation is required for a less-than-significant impact. Potentially Significant Impact - A potentially significant impact is an environmental effect that may cause a substantial adverse change in the environment; however, additional information is needed regarding the extent of the impact. For CEQA purposes, a potentially significant impact is treated as if it were a significant impact. Significant Impact - A project impact is considered significant if it results in a substantial adverse change in the physical conditions of the environment. Significant impacts are identified by the evaluation of project effects in the context of specified thresholds of significance. Mitigation measures and/or project alternatives are identified to reduce these effects to the environment, where feasible. Significant and unavoidable Impact -A project impact is considered significant and unavoidable if it would result in a substantial adverse change in the environment that cannot be feasibly avoided or mitigated to a less-than-significant level if the project is implemented. If a lead agency proposes to approve a project with significant unavoidable impacts, it must adopt a statement of overriding considerations to explain its actions (State CEQA Guidelines Section 15O93(b)). Cumulative Impacts - According to CEQA, "cumulative impacts refer to two or more individual effects which, when considered together, are considerable or which compound or increase other environmental impacts" (State CEQA Guidelines Section 15355). CEQA requires that cumulative impacts be discussed when the "project's incremental effect is cumulatively considerable... [or] ... provide a basis for concluding that the incremental effect is not cumulatively considerable (State CEQA Guidelines Section 15130 (a))." Mitigation Measures - Mitigation measures are identified, where feasible, to avoid, minimize, rectify, reduce, or compensate for significant or potentially significant impacts of the project, in accordance with the State CEQA Guidelines (Section 15126.4). CEQA requires that a diligent effort be taken to identify mitigation measures that would reduce identified significant impacts to less than significant. Where feasible, such measures are presented for all potential impacts identified herein that are found to be potentially significant. Introduction to Impact Analysis 4-2 October 2021