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• API 6531n-Service Inspection Report for 1111111MM1111111 W! Pacific Ethanol HMT inspection Tank No. T-6103 August 7,2013 Stockton, CA Page 6 of 46 SUMMARY AND REPAIR RECOMMENDATIONS (CONT'D.) SHELL (CONT'D.): The shell coating is lightly weathered and is starting to show signs of chalking. The coating is intact with no areas of failure that expose the underlying carbon steel. There is product residue on the shell plates. Consideration should be given to properly cleaning the product residue and to monitoring the coating integrity. 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, D, F, H, K and L do not have reinforcing plates. 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 next time major repairs are made to the shell or when hydrostatic testing is required for other reasons. Existing shell nozzle reinforcing plates do not meet the minimum thickness required by API 650, Para. 5.7 and Figure 5-7b. These details have been present for an extended period of time with no issues noted 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. Shell Nozzles B and F 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. These details have been present for an extended period of time with no issues noted 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. Nozzles B, C, D and F 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 of time with no issues noted 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. RECEIVED E A E I V E APIRPTNE.DOT REV 2 23262666/T6103r(R.v 1) 14.11 11(/W0`131:30PM AUG 14 2014 ENVIRONMENTAL HEALTH DFPARTMFNT