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Local Guidelines for Implementing the <br />California Environmental Quality Act (2023) INITIAL STUDY <br /> <br /> <br />2023 City of Santa Ana Local Guidelines 5-11 ©Best Best & Krieger LLP <br />(b) Demolishes or materially alters in an adverse manner those physical characteristics that <br />account for its inclusion in a local register of historical resources or its identification in a <br />historical resources survey, unless the Lead Agency establishes by a preponderance of <br />evidence that the resource is not historically or culturally significant; or <br />(c) Demolishes or materially alters in an adverse manner those physical characteristics of a <br />historical resource that convey its historical significance and that justify its eligibility for <br />inclusion in the California Register of Historical Resources as determined by the Lead <br />Agency for purposes of CEQA. <br />Generally, a project that follows either one of the following sets of standards and guidelines <br />will be considered mitigated to a level of less than significant: (a) the Secretary of the Interior’s <br />Standards for the Treatment of Historic Properties with Guidelines for Preserving, Rehabilitating, <br />Restoring and Reconstructing Historic Buildings; or (b) the Secretary of the Interior’s Standards <br />for Rehabilitation and Guidelines for Rehabilitating Historic Buildings (1995), Weeks and <br />Grimmer. <br />In the event of an accidental discovery of a possible historical resource during construction <br />of the project, the City may provide for the evaluation of the find by a qualified archaeologist or <br />other professional. If the find is determined to be a historical resource, the City should take <br />appropriate steps to implement appropriate avoidance or mitigation measures. Work on non- <br />affected portions of the project, as determined by the City, may continue during the process. <br />Curation may be an appropriate mitigation measure for an artifact that must be removed during <br />project excavation or testing. <br />(Reference: State CEQA Guidelines, § 15064.5.) <br />5.15 EVALUATING IMPACTS ON ARCHAEOLOGICAL SITES. <br />When a project will impact an archaeological site, the City shall first determine whether <br />the site is a historical resource, as defined in Local Guidelines Section 11.28 If the archaeological <br />site is a historical resource, it shall be treated and evaluated as such, and not as an archaeological <br />resource. If the archaeological site does not meet the definition of a historical resource, but does <br />meet the definition of a unique archaeological resource set forth in Public Resources Code section <br />21083.2, the site shall be treated in accordance with said provisions of the Public Resources Code. <br />The time and cost limitations described in Section 21083.2(c-f) do not apply to surveys and site <br />evaluation activities intended to determine whether the project site contains unique archaeological <br />resources. <br />If the archaeological resource is neither a unique archaeological resource nor a historical <br />resource, the effects of the project on those resources shall not be considered a significant effect <br />on the environment. It shall be sufficient that both the resource and the effect on it are noted in <br />the Initial Study or EIR, if one is prepared to address impacts on other resources, but they need not <br />be considered further in the CEQA process. <br />In the event of an accidental discovery of a possible unique archaeological resource during <br />construction of the project, the City may provide for the evaluation of the find by a qualified <br />archaeologist. If the find is determined to be a unique archaeological resource, the City should