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Of' an unauthorized release or the implementation of actions } taken to prevent or minimize the effects of the unauthorized closure period. release. (4) Except for required venting, all fill and access R�{ (8) Underground storage tanks that have experienced an locations and piping shall be sealed utilizing locked unauthorized release do Pursuant not qualify for temporary closure caps or concrete plugs. to Section 2671 of this article until the pumps underground storage tank owner demonstrates to the local (5) Power service shall be disconnected from all associated with the use of the underground storage tank s agency's satisfaction that appropriate authorized repairs have been made which would allow the underground storage except if the pump services some other equipment which tank to be capable of storing hazardous substances 1s not being closed. to the permit issued by the local agency. Pursuant (c) The monitoring required pursuant to the (h) Underground storage tanks that have experienced an modified or eliminated during the temporarymclosureit may be unauthorized release and that cannot be repaired by by the local agency. The local agency shall consider, in authorized methods must be making the above decision, the need to maintain monitoring requirements of Section 2672eofathlslartfcleclosea pursuant to In order to detect unauthorized releases that may have i occurred during the time the underground storage tank was Authority: H&SC 25299.3 used but that have not yet reached the monitoring locations j Reference; H&SC 25298 and been detected. ) (d) The underground storage tank shall be Adopt new section to read: or operator at least once every 3 montinspected by the owner hs to assure that the temporary closure actions are still in place. This shall 2671. Temporary Closure include; (a) This section applies to those underground st ( 1) Visual inspection of all looked caps and con which storage has ceased but where the owneroorgoperatorin plugs trete Proposes to retain the ability to use the underground (2) If locked caps are utilized, then at least one shall be storage tank within 2 years for the storage de hazardous substances: removed to determine if any liquids or other substances (b) The owner or. operator shall comply with all of Ehe have been added to the underground storage tank or if there has been a change in the quantity or type of following; liquid added pursuant to Subsection (b)(3) of this section. removed and h Authority, H&SC (1) All residual liquid, solids, or sludges shall be andled pursuant to the applicable Reference: H&SC 25298 3 provisions Of Chapter 6.5 of Division 20ofthe Health and Safety Code. (2) If. the underground storage tank contained a hazardous Adopt new Section to read: substance that could standard temperature produce flammable vapors at 2672. Permanent Closure Requirements storage tank, rather in pressure, then the underground Purged of the flammable vaporsart rtoslevelslthathNoulde (a) Owners of underground storage tanks subject to closure shall comply with either Subsection (b)pofmthis required Preclude an explosion or Such lower levels as may be section for underground storage tank removal or Subsection required by the local agency. (3) The underground storage tank may be filled with a (ss of this section for closure In place. It is not essential that all portions of an underground storage tank noncorrosive liquid that fs not a hazardous substance, be permanently closed in the same manner; however, all This liquid must be tested and results submitted to the actions shall comply With the appropriate local agency prior to its being removed from the section. Subsections (d) and e) Ofthis section subsection of this no discharge demonstration applies toall undergroundarding underground storage tank at the end of the temporary storage tanks subject to permanent closure. 7.2 7.3