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. API 653 In-Service Inspection Report for m m m m Pacific Ethanol HMT Inspection Tank No. T-6101 August 6,2013 Stockton, CA Page 5 of 44 2.0 SUMMARY AND REPAIR RECOMMENDATIONS The following is a summary of the significant findings of the inspection. FOUNDATION: The survey found the tank out of level by 0.33 inch. API 653 calculation for deflection of this tank is 0.24 inch. API maximum deflection permitted for this tank is calculated at 0.26 inch (ref. API 653, Para. B.2.2). Differential settlement for his tank does not exceed the API allowable (ref. API 653, Para. B.2.2).This tank is on a stable foundation (raised concrete pad). No corrective action or further evaluation of settlement is necessary at this time. Future settlement should be monitored at the next API 653 inspection. The concrete pad has foundation has random hairline cracks present. These areas should be monitored, repaired and sealed to minimize further degradation to the concrete. The moisture barrier has random areas of failed bond at the bottom edge projection, allowing water to enter under the tank bottom. A suitable moisture barrier should be installed around the entire tank bottom perimeter. • SHELL: Shell thickness calculations indicate the safe fill height of 36.0 feet can be utilized with product specific gravities up to 1.000. The hydrostatic test height can, therefore, utilize this maximum fill height(ref. API 653, Para. 4.3.3.2). These calculations do not take into account operational restrictions from such items as the high-level alarms or owner/operator-imposed safe fill restrictions. This tank is anchored against seismic and wind overturning loads with thirty-six (36) anchor bolts and chairs that are located every 32 inches (approximately) around the tank perimeter (centerline to centerline) and embedded into the concrete pad. These anchor bolts are each 1 inch diameter. Due to the number of anchor bolts presently installed, seismic and wind overturning anchorage is adequate as long as there is no corrosion metal loss to the bolts. There are no reinforcing plates present under the vertical ladder and automatic gauge supports. These details have been present for an extended period and no corrective action is required at this time. These areas should be monitored in future for signs of accelerated corrosion due to possible increased stress concentrations. The shell coating is lightly weathered and is starting to show signs of chalking. Overall, the coating system is in good condition and no repairs are recommended at this time. RECEIVED AUG 14 2014 APIRPTNE.DOT REV 2 232628684$101,(2) 10020138:10AM ENVIRONMENTAL HEALTH DEPARTMENT