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Recommendations Letter In-Service Inspection Report – AST-1 Dart Container Page 2 • An external suction pump for product dispensing was located north of the Tank in the fueling area. Evidence of a leak from under the pump was observed. The leak appeared to be active during the inspection (wet fluid on the pipe connections below the pump). • Instances of coating (paint) failure with surface corrosion were observed over a large portion of the Tank exterior. Shell Testing/Observations Ultrasonic thickness (UT) measurements were recorded in order to establish an inspection baseline for use during future inspections with the purpose of identifying corrosion. While original steel thicknesses of the Tank heads and sides were not available, measurements and visual inspection of the Tank revealed no areas of significant internal or exterior corrosion. Refer to the Figure in Attachment A for thickness measurements and the photographs attached to the formal report. Signs of modifications to the Tank (after initial manufacturing) that would have required welding on the Tank’s shell were evident. Modifications included the addition of a Unistrut piping support bracket on the north side of the Tank, ladder supports on the east end of the Tank, a top platform with handrails. Welds did not appear to visibly distort the Tank shells or to be leaking. Requirements for Continued Use • Replace the 2-inch operational vent with a 3-inch diameter vent. The pressure relief tubing from the dispenser pump was connected to the normal vent. The normal vent is required to be separate from other attachments. The tubing should be rerouted to another opening. Routine inspection and cleaning of the operational vent and ERV is required to maintain proper Tank venting. See the Section 1.9.2 of the Tank Inspection Report on venting and report recommendations for more detail. • Remove surface corrosion and paint the Tank, supports, and uncoated piping as necessary. • Investigate possible seepage and leaks at the fill connection on top of the Tank, bottom drain plug, and from the Tank dispenser piping. Make repairs as necessary. Clean product stains from the exterior of the Tank. • Continue to document monthly and annual inspections in accordance with the Facility Spill Prevention, Control, and Countermeasures (SPCC) Plan. Inspections include monthly check for water in the Tank or implementation of an alternative consistent with Section 6.10 of the STI SP001 Inspection Standard. Inspector Recommendations for Continued Use • Condor recommends the Facility provide signage near the liquid level gauge including the liquid level measurement that corresponds to 90 percent Tank capacity at 6 feet, 7.5 inches (9,003 gallons) and instructions not to fill the Tank past this point. • Condor recommends removal of the external corrosion from the ladder, platform, and handrails followed by the application of a protective coating. • Provide training for personnel performing the monthly and annual inspections to include identification of the applicable Tank equipment and proper completion of the forms.