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Wood <br />Wood Environment & Infrastructure Solutions, Inc. <br />6001 Rickenbacker Road <br />Los Angeles, CA 90040-3031 <br />USA <br />T: +1 323.889.5300 <br />www.woodpIc.com <br />July 25, 2018 <br />Project 4953-18-0631 <br />Mr. Mike Harrah <br />President <br />Caribou Industries <br />1103 North Broadway <br />Santa Ana, California 92701 <br />Subject:Geotechnical Consultation <br />Proposed Alternative Seismic Improvements to Existing Office Building <br />888 North Main Street <br />Santa Ana, California <br />Dear Mr. Harrah: <br />This letter presents the results of our geotechnical consultation in support of the proposed alternative seismic <br />improvements to the existing office building at 888 North Main Street in Santa Ana, California. Our services have <br />been performed in general accordance with our proposal dated June 20, 2018 (revised on July 10, 2018), which <br />you authorized on July 10, 2018. <br />Our professional services have been performed using that degree of care and skill ordinarily exercised, under <br />similar circumstances, by reputable geotechnical consultants practicing in this or similar localities. No other <br />warranty, express or implied, is made as to the professional advice included in this letter. This letter has been <br />prepared for Caribou Industries and their design consultants to be used solely for the proposed alternative <br />seismic improvements to the existing building located at 888 North Main Street in Santa Ana, California. This <br />letter has not been prepared for use by other parties, and may not contain sufficient information for purposes of <br />other parties or other uses. <br />1.0 Background <br />The proposed project is to consist of alternative seismic improvements to the existing office building located at <br />888 North Main Street in Santa Ana, California. We understand that the project requires an evaluation of ground <br />motions having a 50% probability of being exceeded in 50 years. Basic Safety Ear-thquake 1 (BSE-lE per ASCE/SEI <br />41-13) were also requested to study damper forces in extreme conditions. The original building was constructed <br />in the 1960s and housed the Security First National Bank. The existing building is up to 10 stories tall with one <br />full and one partial subterranean parking level that extends 10 to 20 feet below the surrounding grade and is <br />supported on drilled cast-in-place concrete pile foundations. The location of the site is illustrated on Figure 1, <br />Site Vicinity Map. <br />'Wood' is a trading name for John Wood Group PLC and its subsidiaries ... <br />1-81--1Â¥9,-6-10 '1 00017 <br />5 DIL5 Fopolf - CITY <ST