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ite (f) Underground storage tanks, closed on-sneednnotcleaning Comply with thn closet 1e , Article 7. Closure Requirements inert solid prior to January 1, 7884, hazardous substances released from requirements in this section. However, small be reported by the owner such tanks before or after the closure, pursuant to l be 2670. Applicability section pursuant Ito Article4 of 5Hof this chandeany other lapplicable elawpr regulations. (a) This article defines temporary and permanent closure and describes the nature of activities which must be accomplished in order to protect water quality in Authority: Health and Safety Code 25299.3, 25299.7 Reference: Health and Safety Code 25298 each of these situations. 40 CFR 280.10, 280.71, 280.73 (b) The temporary closure requirements of section 2671 shall apply to those underground storage tanks in which the storage of hazardous substances to has 2671. Temporary Closure Requirements ceased but the underground storage tank will again be used for the storage of hazardous substances within the next 12 consecutive months. At the end of 12 with the months, the local agency may approve an extension of the temporary closure a Thepowneraor operator shallte closure of all undergcou distorage�tankots o period for a maximum additional period of up to 12 months if the tank system ( ) • meets the requirements for new underground storage tank system or the upgrade (1) All residual liquid, solids, or sludges shall be removed and handled requirements for existing tanks. Section 2671 of this article does not apply pursuant to the applicable provis Sons of Chapters 6.5 and 6.7 of Division to underground storage tanks that are empty as a result of the withdrawal of 20 of the Health and Safety Code. all stored material during normal operating practice prior to the planned input of additional hazardous substances. (2) If the underground storage tank contained a hazardous substance that Couldhe produce flammable vapors nk shat lstanbe dard tempasaoftetureo as nd necessary `poen (c) Thepermanent too th seclosure undergroundfrement storage tanks nof o whichbused, storagof this e of hazarintended levels that will preclude an explosion ar to such lower levels as may be substances has ceased and the tanks will not be used, or are not intended for required' by the local agency. use, for storage of hazardous substances within the next 12 consecutive be filled with a noncorrosive liquid months. (3) The underground storage tank may be and th,tesat is nott results submitted to thence. This local agencyipr iormtot its beingdremovede (d) The requirements of this article do not apply to those underground storage from the underground storage tank at the end of the temporary closure tanks in which hazardous substances are continued to be stored but no filling or withdrawal has been made. In these cases, the applicable containment and period. monitoring requirements of Articles 3 or 4 of this chapter shall continue to apply. (4) Except for required venting, all fill and access locations and piping us (e) actual the completion of undergroundnstoragei tankon fclosureopursuantatoesection e2671 and shall be sealed utilizing locked caps or concrete plugs. or 2672, the applicable containment and ply. ing requirements of Articles 3storage tank (5) Power service the shall be disconnected from all P powers services some other or 4 of this chapter shall continue to apply. equipment which is not being closed such as the impressed current cathodic protection system. (f) At as may be approved bydthe local agency, thrior to e underground storage or for such shorter tank Ownerwho (b) The monitoring required pursuant to the permit may be modified by the local • intends to close a tank shall suhmit to the local agency a proposaldescribing agency during the temporary closure period. In making a decision to modify how the owner intends to comply with section 2671 or 2672 of this article, as such monitoring the local agency shall consider the need to have on appropriate. monitoring in order to detect unauthorized releases that may have occurred (g) Underground storage tanks that have emitted an unauthorized release do not during the time the underground storage tank was used but that have not yet qualify for temporary closure pursuant to section 2671 of this article until been detected. the underground storage tank owner demonstrates to the local agency's satisfaction [hat appropriate at authorized repairs have been made which would (c) least Onceeverymonthsato verifyhthat s inspected temporary the closurener rmeasuresr are make the underground storage tank capable of storing hazardous substances in accordance with the permit issued by the local agency. still in place. Such inspection shall include at least the following actions: (h) Underground storage tanks that have emitted an unauthorized release and that (1) Visual inspection of all locked caps and concrete plugs. cannot be repaired by authorized methods must be permanently closed pursuant to requirements of section 2672 of this article. 7.2 7.1