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S.Y. KIM, PE, SE 2304 Lancaster Court <br /> Hayward,California 94542 <br /> Consulting Structural Engineer Phon0l`ax', (510)582-0718 <br /> January 12, 2019 <br /> Mr. Martin Jeppeson <br /> Director of Environmental and Regulatory Affairs <br /> CALAMCO <br /> 1776 W. March Lane,Ste.420 <br /> Stockton,CA 95207 <br /> Re: 12' DiameterX 24' High Diesel Tank Inspection <br /> Dear Martin: <br /> Per your request,on January 2, 2019, 1 made a visual inspection of the referenced tank and conducted a <br /> stress analysis to evaluate the safety of the tank. The visual inspection indicates that the tank is in very <br /> good condition and shows no visible signs of distress such as a distorted shell or leaks around the <br /> nozzles. Regarding the stress analysis,as the attached document shows,the stress level of both under <br /> the static and the seismic loads are very small.The stress analysis was performed using the API 650 <br /> guide lines under the small tank category classification. <br /> To summarize:based on the visual Inspection and the stress analysis, It Is my professional opinion that <br /> the above-referenced tank meets all safety standards and is safe to operate as diesel storage. <br /> Sincerely, Q4E391b <br /> Structu al Engineering Consultant 6, �Nfmft vt. <br /> ` <br /> PC <br />