An owner, an operator, and a person in charge of an AST system with a field-erected AST shall: Ensure the field-erected AST is: Properly designed for the oil storage application and type of oil to be stored; Constructed of welded carbon steel or stainless steel; and Constructed to an industry standard, including an API standard for field-erected ASTs incorporated by reference in COMAR 26.10.01.03; Ensure the foundation of the field-erected AST: 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: Field and laboratory testing; and Analyses and other sound engineering practices performed by a professional engineer; Is capable of supporting the load of the AST and its contents without excessive differential settlement; and Provides positive drainage of water away from the AST base; and Test a new, repaired, or relocated AST system for tightness in accordance with NFPA 30 “Flammable and Combustible Liquids Code”: Upon completion of the installation or repair of the AST system; and Before placing the AST system in-service