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24.0770 Permanent closure and changes-in-service.

Cite as [A.S.A.C. § 24.0770]

Any tank removed from service prior to the effective date of these rules or any tank to be removed from service for more than 12 months shall be permanently closed. Permanent closure includes:

(1) At least 30 days before beginning either permanent closure or a change-in-service under paragraphs (2) and (3) of this section, or within another reasonable time period determined by the implementing agency, owners and operators must notify the implementing agency of their intent to permanently close or make the change-in-service.

(2) To permanently close a tank, owners and operators must empty and clean it by removing all liquids and accumulated sludges. All tanks taken out of service permanently must also be either removed from the ground or filled with an inert solid material.

(3) Continued use of an UST system to store a non-regulated substance is considered a change-in-service, owners and operators must empty and clean the tank by removing all liquid and accumulated sludge and conduct a site assessment in accordance with 24.0772.

(4) If a UST is permanently closed and removed from the ground, the UST cannot be reused as an AST. The tank must be properly disposed as approved by the implementing agency.

(5) Workers /contractors performing cleaning and/or removal of the implementing agency and requirements meet or exceed OSHAs and EPAs hazardous waste operations (29 CFR 1910.120 : 40-Hour HazWoper.)

Note: The following cleaning and closure procedures may be used to comply with this section: (A) American Petroleum Institute Recommended Practice 1604, “Removal and Disposal of Used Underground Petroleum Storage Tanks”;

(B) American Petroleum Institute Publication 2015, “Cleaning Petroleum Storage Tanks”;

(C) American Petroleum Institute Recommended Practice 1631, “Interior Lining of Underground Storage tanks, may be used as guidance for compliance with this section; and

(D) The National Institute for Occupational Safety and Health, “Criteria for a Recommended Standard * * * Working in Confined Space” may be used as guidance for conducting safe closure procedures at some hazardous substance tanks.

History: Rule 3-01, eff 30 Aug 01.