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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 /> BOTTOM CORROSION RATE TABLE ANNULAR PLATE <br /> Tank 3 Inspection History Tank 2 Inspection History Soil-Side Annular Plate Corrosion Rate(s) <br /> Tank 3 Powers EI Data from 2010 Tank 2 Powers EI Data from-(Assumed) Tank 3 Powers EI Data from 2010 Tank 2 Powers EI Data from- <br /> (Assumed) <br /> Years Before Repair After Repair Year Remaining After Repair Year Remaining Year Remaining <br /> Thickness(in) Thickness(in) Thickness(in) <br /> 1991 0.3125 0.3125 1991 0.3750 0.3750 1991 0.3125 1991 0.3125 <br /> 2010 0.3000 0.3000 2010 0.3368 0.3368 2229 0.1700 2229 0.1700 <br /> 2512 0 2512 0 <br /> Soil Side Corrosion Rate after repairs for tank 2 . . is 0.00065789 in/yr <br /> API 653 SIMILAR SERVICE YELLOW FREIGHT TANK 2 TRACY,CA 2019.DOCX Page 16 of 21 Date Printed:614119 9:53 AM <br /> ©2017 PE&I Inc. <br />