The requirements of this regulation apply to an owner, an operator, and a person in charge of an AST system with a shop-fabricated AST required under COMAR 26.10.01.10 to register the AST system with the Department. Out-of-Service. An owner, an operator, and a person in charge of an AST system with a shop-fabricated AST shall complete each of the following steps to place the AST system out-of-service: Remove all oil from the AST system; Isolate all piping connected to the AST; Remove all waste materials from the AST system, including storage tank-bottom sludge, and dispose of these materials in compliance with applicable federal, State, and local laws; Purge all petroleum vapors and maintain the AST system vapor free; Secure the AST system to prevent unauthorized entrance or tampering; Protect the AST system from flotation; Continue the operation and maintenance of corrosion protection on the AST system in accordance with Regulation .10 of this chapter; Lock the fill port; Label the AST using lettering at least 3 inches high, in a readily visible location on the AST, with the following information: Date the AST was placed out-of-service; Name of product last stored; and The words “OUT-OF-SERVICE” or “EMPTY”; and Notify the Department in writing 30 days before placing the AST system out-of-service. Return to In-Service. An owner, an operator, and a person in charge of an out-of-service AST system with a shop-fabricated AST shall complete each of the following steps prior to placing the AST system in-service: If a formal inspection and leak test was due to occur while the AST system was out-of-service, conduct a formal inspection and leak test of the AST system in accordance with Regulation .12 of this chapter; Test all connected piping and appurtenances to ensure a spill, release, or discharge will not occur; Maintain a copy of all corrosion protection system and formal inspection and testing reports, including the findings of inspections and tests and repairs performed, and provide a copy to the Department upon request; and Notify the Department in writing 30 days before placing the AST system in-service. Permanent Closure. An owner, an operator, and a person in charge of an AST system with a shop-fabricated AST shall permanently close the AST system in accordance with the following requirements: At least 30 days before beginning the permanent closure of the AST system: Notify the Department in writing of the planned AST system permanent closure; and Submit to the Department for approval a proposed sampling plan for a site assessment to determine if there is evidence of a spill, release, or discharge where contamination is most likely to be present, which includes the sampling of, at a minimum, the following areas of the AST site: Within and immediately outside of the secondary containment dike, if present; Within the footprint of the removed AST; and Beneath underground piping associated with the removed AST; Place the AST system out-of-service in accordance with §B of this regulation; Comply with PEI RP 1700 “Recommended Practices for the Closure of Underground Storage Tank and Shop-Fabricated Aboveground Storage Tank Systems”; Disconnect and remove all aboveground piping associated with the AST system; Disconnect and remove all underground piping associated with the AST system: Under the continuous on-site presence and direction of a certified UST system technician or remover; and In accordance with the UST system permanent closure procedures in COMAR 26.10.10.02D; Remove the AST and associated piping from the site; and Within 45 days of completing the permanent closure and approved site assessment, submit a closure report to the Department detailing: The AST closure activities; and The results of the sampling event, including a map identifying sample locations, laboratory results, summary of findings, and conclusions. Change-in-Service. An owner, an operator, and a person in charge of an AST system with a shop-fabricated AST placing the AST system out-of-service in order to store a non-oil product in the AST system shall: Notify the Department in writing at least 30 days before placing the AST system out-of-service; and Place the AST system out-of-service in accordance with the requirements of the Department. Upon completing an out-of-service activity specified §§B—E of this regulation, an owner, an operator, and a person in charge of an AST system with a shop-fabricated AST shall: Within 30 days, amend the AST system registration with the Department in accordance with COMAR 26.10.01.10; and If the oil storage facility or oil handling facility is required under COMAR 26.10.01.09 to be operated under an Individual Oil Operation Permit, submit a request to modify the Individual Oil Operations Permit in accordance with COMAR 26.10.01.12.