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API 653 In-Service Inspection Report for WW == M Pacific Ethanol HMT Inspection Tank No. T-6101 August 6,2013 Stockton, CA Page hof 44 SUMMARY AND REPAIR RECOMMENDATIONS (CONT'D.) SHELL (CONT'D.): The next external API 653 inspection should be conducted within 5 years and no later than April 2018 (ref. API 653, Para. 6.3.2.1). Complete API 653 out- of-service inspection prior to this date would supplement the next external inspection requirement. Shell Ultrasonic (UT) testing should be conducted again within 15 years and no later than April 2028 (ref. API 653, Para. 6.3.3.2). Complete API 653 out-of-service inspection prior to this date would supplement the next external inspection. NOZZLES AND APPURTENANCES: Visual (VT) inspection and Ultrasonic(UT)testing of the nozzles and manway were performed. Shell Manway A reinforcing pad is located over a 3-plate weld joint that does not meet the requirements per API 650, Para. 5.7.3.4 • Shell Nozzles B, C, F, H, I, J, and K do not have reinforcing plates. Per API 650 5.7.2.1, nozzle larger than NPS 2 shall be reinforced. Nozzle B is a foam injection nozzle above the product line and Nozzle B is blinded, both above the maximum product fill height. Visual (VT) inspection of these appurtenances found them in acceptable condition. This is provided as information only and no corrective action is required at this time. Consideration should be given to installing seal welded reinforcing plates if major alterations/modifications are made to the shell or respective nozzle. Shell Nozzles F and K have centerline elevations from the center of the nozzle neck and the bottom edge projection that is less than that required by API 650, Para. 5.7 and Figure 5-8. Visual (VT) inspection of these appurtenances found them in acceptable condition. This is provided as information only and no corrective action is required at this time. Consideration should be given to raising these nozzles if major alterations/modifications are made to the shell or respective nozzle. Nozzles F, H, I and K do not meet the minimum neck thickness requirements of API 650 (ref. Table 5-6, Column 3). These details have been present for an extended period and no corrective action is required at this time. This area should be monitored in future for signs of accelerated corrosion due to possible increased stress concentrations (stress- induced corrosion). Consideration should be given to upgrading the neck thickness if major alterations/modifications are made to the shell or respective nozzle. RECEIVED • AUG 14 2014 APIRPTNE.DOT REV 2 232626664-6161 r(2) IzNVIRUWMPAL HEALTH TH DEPARTMENT f�