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API 653 In-Service Inspection Report <br /> for <br /> Pacific Ethanol HMT Inspection <br /> Tank No. T-6106 August 8,2013 <br /> Stockton, CA Page 13 of 46 <br /> 4.2 BOTTOM <br /> 4.2.1 BOTTOM INSPECTION CHECKLIST <br /> ITEM NO, BOTTOM INSPECTION COMMENTS <br /> 17 Record minimum bottom plate thickness requirements(ref.API 653, NIA <br /> Para.4.4.5). <br /> 18 MFL scan of accessible bottom plates. Quantify all findings(ref.APV NIA <br /> 653, Paras.4.4.4&4.4.5 <br /> 19 Visual inspection of bottom plate surface condition(ref.API 653, Para. NIA <br /> 4.4.1 <br /> 20 Conduct Ultrasonic thickness readings of bottom plates. Record all NIA <br /> data ref.API 653, Para.4.4.4). <br /> 21 Locate unacceptable voids beneath bottom. Record the locations(ref. NIA <br /> API 653, Para.4.4.2.h&j)(ref.API 653, Para.9.10.2.1.3). <br /> 22 Visual inspection of bottom plate lap welds(for reportable indications NIA <br /> or other anomalies)(ref.API 653, Para.4.4.2,/Fig.9.1). <br /> 23 Perform Vacuum Box testing of bottom lap welds. NIA <br /> 24 Shell-to-bottom weld condition ref.API 653, Para.4.4.2 . NIA <br /> 25 Perform Magnetic Particle testing of internal shell-to-bottom weld. NIA <br /> 26 Perform Vacuum Box testing of internal shell-to-bottom weld. NIA <br /> 27 Identify all signs of product leakage. NIA <br /> Reinforcing pads present under all clips, brackets and supports 1 NIA <br /> 28 condition(ref,API 650, Paras.5.10.4.7/ H.4.6.7),(ref.API 653, Para. <br /> 9.10.2.2). <br /> 29 Floating roof leg striker plate condition(pitting,cutting,and dimpling). N/A <br /> 30 Fixed roof column bearing I base plate condition(corrosion,weld NIA <br /> failure). <br /> 31 Fixed roof column lateral clips(align tank columns)(ref.API 650, Para. NIA <br /> 5.10.4.7) <br /> Conduct Visual inspection of reinforcing, bearing, base, striker plates NIA <br /> 32 and existing lap patches(ref.API 653, Paras.9.10.1.2, &9.10.3&Fig. <br /> 9.9 <br /> 33 List any limitations to bottom inspection. NIA <br /> ITEM NO. SUMP INSPECTION <br /> COMMENTS <br /> Describe sump type I condition(Modified,false bottom, dish 1 bowl, NIA <br /> 34 etc.)details to include physical dimensions(ref.API 653, Paras.4.4.2, <br /> 9.10.1.5&C.2.3), ref.API 650,Table 5-16b&Fig. 5-21). <br /> 35 Perform Visual inspection of the sum (including all sump welds). NIA <br /> 36 Perform Magnetic Particle testing examination on all sump welds NIA <br /> (including sump-to-bottom weld). <br /> 37 Perform Sump UT. Record lowest UT reading per grid in sump UT NIA <br /> form. <br /> "k <br /> AUG 14 2094 <br /> APIRPTNE.DOT REV 2 23262868ff-6106r(Rev 1) 1116/2013 1:59 PM <br /> ENVIRONMENTAL HEALTH/ <br /> DEPARTMENT <br />