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Table 3—Visual and Non-Destructive Container Shell Inspection Requirements <br /> Container Type Capacity(Gallons) AST Category Inspection Type <br /> 1, 11 Visual Inspections by trained Facility Personnel <br /> 55- 1,100 III Non-Destructive Shell Inspection by a Certified <br /> Inspector <br /> I Visual Inspections by trained Facility Personnel <br /> Shop-Fabricated AST 1,101 —5,000 II, III Non-Destructive Shell Inspection by a Certified <br /> Inspector <br /> Visual Inspections by trained Facility Personnel and <br /> 5,001 —50,000 I,II, ITI Non-Destructive Shell Inspection by a Certified <br /> Inspector <br /> Portable Containers > 55 - Visual Inspections by trained Facility Personnel <br /> Note <br /> A:Tank category designations from STI's SP001 -6th Edition Inspection Standard,January 2018. <br />