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CCR.TrnE 23, DMs10N 3, CaMIMR 16, UNDERGROUND STORAGE TANK REGULATIONS CCR,TrnE 23, DMstON 3, cii rrm 16, UNDERGROUND STORAGE TANK REGULATIONS ;lease do not AttnCLE 7. CLOSURE REQUDUWENTs Post-V brand fax transmittal memo 7671 a the owner or �/t From that appropriate 2670. Gmeral Applicability of Article / (!� /�t�Y-i(�iwnd storage tank Ca. C0� he permit issued This article defines temporary and permanent underground storage tank Phone g 4closure and describes the nature of activities which shall be accomplished in OaPt- Zaglorder[o pro[ett water quality in each of these situations. Pax# o`�6pax#r L� :d release and that \ ntly closed (b) The temporary closure requirements of section 2671 shall apply to those underground storage tanks in which the storage of hazardous substances has - ceased but the underground storage tank will again be used for the storage of Decommissioned tanks and underground storage tanks, permanently closed on- hazardous substances within the next 12 consecutive months. At the end of 12 ()h site by cleaning and filling with an inert solid prior to January 1, 1984, need consecutive months during which the tank is temporarily closed,the local not comply with the closure requirements in this section unless required by the agency may approve an enension of the temporary closure period for a local agency. However,hazardous substances released from such tanks before 40 martimum additional period of up to 12 months. owners or operators shall or after the closure,shall be reported by the owner pursuant to Article 5 and complete a site assessment in accordance with section 2672(d) before an shall be cleaned up pursuant to section 13304 of the Water Code,Article 11 of extension may be granted by the local agency. The temporary closure these regulations,and any other applicable law or regulations. requirements of section 2671 do not apply to underground storage tanks that are empty as a result of the withdrawal of all stored substances during normal operating practice prior to the planned input of additional hazardous (j) A regulated tank shall t local g the requirements m subsectionsthe) and Link. (e of section 2672 before the local agency may gran p substances. (c) I he permanent closure requirements of section 2672 shall apply to those Authority: Health and Safety 25299.3, 25299.7 underground storage tanks in which the storage of hat,;dous substances has Reference: Health and Safery 25298; 40 CFR 280 70, 380.71; 280.73, and 280.74 ceased and the tanir:will not be used,or are not intended for use,forthe- storage of hazardous substances within the next 12 consecutive months. 2671. Temporary Closure Requiremm:a (d) The requirements of this article do not apply to those underground storage a An owner or operator shall comply with all of the following requirements to Links in which hazardous substances continue to be stored but no input or ( ) withdrawals are being made. In these cases,the applicable containment and monitoring requirements of Articles 3 or 4 shall continue' complete and maintain temporary closure of an underground storage tank: to apply. (1) All residual liquid, solids,or sludges shall be removed and handled in accordance with the applicable provisions of in accordance with Chapters •(e) During the period of time between cessation of hazardous substance storage 6.5 and 6.7 of Division 20 of the Health and Safety Code. and actual completion of underground storage Link closure pursuant to sec[ior 2671 or 2672, the applicable containment and monitoring requirements of 2 if the underground storage tank contained a hazardous substance that Articles 3 or 4 shall continue to apply. The time period between cessation of ( ) could produce flammable vapors at standard temperature and pressure,it hazardous substance storage and application for temporary or permanent-tank shall be inerted,as often as necessary,to levels that will preclude an closure shall not exceed 90 calendar days. Closure shall be completed within a explosion or to lower levels as required by the local agency. reasonable time period as determined by the local agency. A[least 30 calendar days prior to closure,or within a shorter period of time (3) The underground storage tank may iq filled with a noncorrosive liquid that (f) is not a hazardous substance. This liquid shall be tested and the test approved by the local agency,the owner or operator who intends to close a results submitted to the local agency prior to removal from the Link shall submit to the local agency for approval,a proposal for compliance closure period. underground storage Link at the end of the temporary P with section 2671 or 2672, as appropriate. (4) Except for required venting, all fill and access locations and piping shall be 7-2 7- 1