An owner, an operator, and a person in charge of an AST system with a field-erected AST shall:

1. A. Ensure the field-erected AST is:

   1. (1) Properly designed for the oil storage application and type of oil to be stored;
   2. (2) Constructed of welded carbon steel or stainless steel; and
   3. (3) Constructed to an industry standard, including an API standard for field-erected ASTs incorporated by reference in COMAR 26.10.01.03;

2. B. Ensure the foundation of the field-erected AST:

   1. (1) Is designed and constructed in accordance with Annexes B and I of API Standard 650 “Welded Tanks for Oil Storage” to prevent settlement of the foundation and the AST due to soil bearing capacity and other site conditions using:

      1. (a) Field and laboratory testing; and
      2. (b) Analyses and other sound engineering practices performed by a professional engineer;
   2. (2) Is capable of supporting the load of the AST and its contents without excessive differential settlement; and
   3. (3) Provides positive drainage of water away from the AST base; and

3. C. Test a new, repaired, or relocated AST system for tightness in accordance with NFPA 30 “Flammable and Combustible Liquids Code”:

   1. (1) Upon completion of the installation or repair of the AST system; and
   2. (2) Before placing the AST system in-service

Authority: Environment Article, §§4-401—4-403, 4-405, 4-406, 4-408, 4-410—4-412, 4-415-1—4-418, 4-501, and 4-502, Annotated Code of Maryland

Effective date: June 13, 2022 (49:12 Md. R. 642)