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Po Box 1928 API 653 SIMILAR SERVICE <br /> P0 M0 BeNICIA,L7073A94510 <br /> TEL 707 334 3400 KRK PETROLEUM TRACY,CA <br /> FAx 707 926 2684 <br /> ENGINEERING$INSPECTION,INC www•powersei.com Tank 2 (Candidate Tank) <br /> data. corrosion rate may factor in the development of <br /> inspection intervals if corrosion was noted. However, <br /> because corrosion rates were minimal for control <br /> Tank 3, shell corrosion rates will not be considered <br /> for this assessment. <br /> • In addition, coinciding with the similar service <br /> inspection, an API 653 External In-Service Inspection <br /> was conducted on candidate Tank 2 in 2016. UT <br /> drops performed on candidate Tank 2 indicated <br /> nominal thicknesses along the shell courses with no <br /> corrosion noted. Again, based off these findings and <br /> the findings from control Tank 3 shell corrosion rates <br /> will not be considered for this assessment. <br /> 4 Additional Additional • No additional similar service issues identified. <br /> Similar Assessment <br /> Service performed per <br /> Assessment API 653 4th <br /> Required Edition Annex H <br /> Similar Service if <br /> candidate and <br /> control tank <br /> conditions do not <br /> match (see <br /> Similar Service <br /> Assessment Data <br /> Sheets <br /> API 653 SIMILAR SERVICE YELLOW FREIGHT TANK 2 TRACY,CA 2019.DOCX Page 3 of 21 Date Printed:614119 9:53 AM <br /> ©2017 PE&I Inc. <br />