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Leighton and Associates, Inc <br />A LEIGHTON GROUP COMPANY <br />October31, 2018 <br />(Revised January 7, 2019) <br />Project No. 12126.001 <br />Kimley-Horn and Associates, Inc. <br />765 The City Drive, Suite 200 <br />Orange, California 92868 <br />Attention: Ms. Margit Allen <br />Subject: Geologic and Seismic Hazards Review <br />MainPlace Mall Transformation Project <br />2800 N. Main Place Street <br />City of Santa Ana, Orange County, California <br />In accordance with your request and authorization, Leighton and Associates, Inc. <br />(Leighton) has conducted a geologic and seismic hazards review in support of the <br />California Environmental Quality Act (CEQA) for the proposed MainPlace Mall <br />Transformation Project located at 2800 N. Main Street in the City of Santa Ana, Orange <br />County, California. The purpose of this study has been to assess potential geological <br />and geotechnical impacts or constraints with respect to the proposed project. <br />It is our understanding that the current concept for transformation of the site is to reduce <br />the square footage of entitles but not constructed office and retail uses to allow for the <br />addition of residential uses on the site. The proposed redevelopment concept includes <br />several new multi -level multi -family residential buildings, hotels, retail, office buildings <br />and parking structures. <br />Our work has been performed following the California Geological Survey's Guidelines <br />for Geologic/Seismic Consideration in CEQA's. Based on the results of our current <br />study, no major geologic conditions have been identified that would preclude <br />development of the site for the intended use as currently planned. This report <br />summarizes our findings and conclusions, and presents design considerations to <br />17781 Cowan • Irvine, CA92614-6009 <br />949.250.1421 - 949.250.1114 Fax <br />