In Delaware, above-ground fuel storage tanks are typically regulated by the Delaware Department of Natural Resources and Environmental Control (DNREC) under the Delaware Regulations Governing Aboveground Storage Tank Systems (AST Regulations).
The AST Regulations apply to above-ground storage tanks (ASTs) that contain petroleum or other hazardous substances. The requirements for inspection and maintenance are outlined in Section 11 of the AST Regulations.
Specifically, Section 11.6 of the AST Regulations requires that all regulated ASTs must be visually inspected at least once every three years by a qualified inspector. The inspector must be certified by the Steel Tank Institute (STI) or the American Petroleum Institute (API), or have equivalent qualifications approved by DNREC. The inspection must include an examination of the tank and associated piping, as well as non-destructive testing of the tank shell and bottom.
In addition to the periodic inspections, Section 11.5 of the AST Regulations requires that all regulated ASTs must be maintained in a safe and operable condition at all times. This includes regular monitoring for leaks, corrosion, and other signs of damage, as well as promptly repairing or replacing any damaged components.
It’s important to note that the specific requirements for above-ground fuel storage tank inspections and maintenance in Delaware can vary depending on the type of tank and the product being stored, so it’s important to check with DNREC to ensure that you are in compliance with all applicable regulations.