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PO Box 1928 <br /> POWERS BENICIA,CA 94510 STI SP-001 INSPECTION <br /> TEL 707 334 3400 <br /> FAx 707 922 2284 WILBUR ELLIS MANTEGA,CA <br /> ENGINEERING&INSPECTION,INC. www.powersei.com Tank 4038 <br /> 3. Ultrasonic Thickness Test <br /> Ultrasonic Thickness Test was performed on accessible sections of the steel tank shell and end caps. All <br /> spot readings returned nominal thickness, approximately 0.340-in.All UT scrubs had minimal to no change <br /> in signal signifying little to no metal loss. Any variations or changes in thickness outside of the original <br /> nominal thickness (if any) would be documented and analyzed in this section. Access to the third course <br /> was not possible during the inspection. <br /> Shell Course Thickness (in.) <br /> 1 0.340 <br /> 2 0.340 <br /> 3 0.340 <br /> 4 0.340 <br /> STI-SP001 Wilbur Ellis Tank 4038 Manteca,CA 2019 RevO Date Printed:4/11/19 <br /> ©2019 PE&I Inc. <br /> Page 13 <br />