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<br />www.teaminc.com <br /> <br />STI SP001 Tank Inspection <br />Report <br />Community Fuels <br />Tank no. T-611 <br />March 30th 2019 Stockton, CA <br />Page 12 of 26 <br />5.2 BOTTOM <br /> <br /> <br />Item Description Condition Comment <br />B-1 Visual (VT) Inspection of bottom / bottom coating. <br />Record all findings <br />Not <br />Applicable <br />Tank has a cone down bottom and is <br />insulated <br />B-2 <br />Vacuum Box (LT/BT) inspection of lap / butt welds <br />and internal shell-to-bottom weld. Record all <br />findings. <br />Not <br />Applicable <br />B-3 Magnetic Particle (MT) inspection of the internal <br />shell-to-bottom weld. Record all findings. <br />Not <br />Applicable <br />B-4 Visual (VT) inspection on bottom lap / butt welds <br />and shell-to-bottom weld. Record all findings. <br />Not <br />Applicable Limited VT; Tank bottom is insulated <br />B-5 Ultrasonic (UT) thickness measurements of bottom <br />plates. Record all data. Code D UT measurements taken at TML spots <br />B-6 MFL scan of accessible bottom plates. Quantify all <br />findings. <br />Not <br />Applicable <br />B-7 If MFL is not performed, perform 100% UT on all <br />areas that are in direct contact with the ground. <br />Not <br />Applicable <br />B-8 <br />Perform Ultrasonic (UT) testing of the bottom and <br />compare to original nominal thickness. Reference <br />SP001, Section 10 for Suitability for Continued <br />Service. <br />Code D Base line UT measurements were taken <br />B-9 Locate unacceptable voids beneath bottom. Not <br />Applicable <br />B-10 Visual (VT) inspection of reinforcement, if present. Not <br />Applicable Tank is externally insulated <br />B-11 Visual (VT) inspection of sump(s), sump welds and <br />condition of sump coating, if present. <br />Not <br />Applicable <br />B-12 <br />Ultrasonic (UT) thickness readings of sump(s), if <br />present. Record all data. Perform additional NDT if <br />necessary. <br />Not <br />Applicable <br />B-13 Visual (VT) inspection of fixed roof support <br />column(s), if present. <br />Not <br />Applicable <br />B-14 Complete detailed bottom drawing. Not <br />Applicable <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />CONDITION CODE DEFINITIONS <br />Code A: Unsafe condition, repairs critical to tank integrity (e.g. bottom / shell repairs) - Out of compliance with current STI / SP001 standards. <br />Positive action must be taken prior to continued service. <br />Code B: Recommendation involving inspection findings that do not have immediate safety or environmental implications, but through continued <br />deterioration could eventually become a Code A condition. Recommendations also address out-of-compliance with current STI / SP001 standards <br />with no damage or failure noted. Further Engineering evaluation required. Assessed and documented prior to continued service. <br />Code C: No action required non-critical pertinent findings / suggestions. Monitor for continued deterioration. <br />Code D: Acceptable - In compliance w/ STI / SP001 Standards - No action required <br /> <br />