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CCR, TYME 23, DMSION 3, CHAPTER 16, UNDERGROUND STORAGE TANK REGULATIONS CCR, TIn.E 23, DMSION 3, CHAPTER 16, UNDERGROUND STORAGE TANK REGtMnONS sealed using locking caps or concrete plugs. removal or subsection(e)for closure in place. It is not essential that all portions of an underground storage tank be permanently closed in the same (5) Power service shall be disconnected from all pumps associated with the use manner;however,all closure actions shall be conducted in accordance with this of the underground storage tank unless the power services some other section. Subsections(d)and(e)apply to all underground storage tanks subject equipment which is not being closed, such as the impressedr nt to permanent closure. cathodic protection system. (b) Owners or operators of underground storage tanks subject to permanent (b) The monitoring required pursuant to the permit may be modified by the local closure shall comply with applicable provisions of Chapter 6.5 of Division 20 of agency during the temporary closure period. In making a decision to modify the Health and Safety Code and with the following requirements: monitoring requirements,the local agency shall consider the need to maintain monitoring in order to detect unauthorized releases that may have occurred (1) All residual liquid, solids,or sludges shall be removed and handled as during the time the underground storage tank was used but that have not yet hazardous wastes or recyclable materials in accordance with Chapter 6.5 of • been detected. In ad cases,corrosion protection shall continue to be operated. the Health and Safety Code. (2) If the underground storage tank contained a hazardous substance that (c) The underground storage tank shall be inspected by the owner or operator ar could produce flammable vapors at standard temperature and pressure, it least once every three months to verify that the temporary closure measures are shall be inerted to levels that shall preclude explosion or to lower levels as still in place. The inspection shall include but is not limited to the following: required by the local agency. (1) Visual inspection of all locked caps and concrete plugs. (3) When an underground storage tank or any part thereof is disposed of, the owner or operator shall document to the local agency that proper disposal (2) If locking caps are used,at least one shall be removed to determine if any has been completed. This documentation shall be submitted within the liquids or other substances have Baer,added to the underground storage time frame specified by the local agency. tank or if there has been a changes in me^quantity or ype of liquid added - - pursuant to ;ubsec-ion(a)(3)of this section. (4) .1n owner or operator of an underground storage tank of any part thereof that is destined for a specific reuse shall advise the local agency, within the (d) At the end of a temporary closure period over 12 months, including any time frame specified by that agency, of: extension granted by the local agency, the owner may reuse the underground storage tank only if the tank meets the requirements of Article 3 for new (A) The names of the new owner and new operator of the underground underground storage tanks or is upgraded to meet the requirements of storage tank; Article 6. (B) The location of intended use;and (C) The nature of intended use. •(e) All new and existing underground storage tank systems which have been temporarily closed must continue to comply with repair and recordkeeping (c) Owners or operators of underground storage tanks subject to permanent requirements,release reporting and investigation requirements,and release closure where the tanks are approved to be closed in place shall comply with response and corrective action requirements specified in this chapter and the applicable provisions of Chapters 6.5 and 6.7 of Division 20 of the Health Chapter 6.7 of the Health and Safety Code. and Safety Code and with the following requirements: Authority: Health and Safety Code 25299.3, 25299.7 (1) All residual liquid, solids,or sludges shall be removed and handled as a Reference: Health and Safety Code 25298; 40 CFR 280.70, 281.36(a)(1) hazardous waste or recyclable materials in accordance with Chapters 6.5 and 6.7 of the Health and Safety Code. 2672.Permanent Closure Requirements (2) If the underground storage tank contained a hazardous substance that could produce flammable vapors at standard temperature and pressure,it (a) Owners or operators of underground storage tanks subject to permanent shall be inerted to levels that shall preclude explosion or to lower levels as closure shall comply with either subsection(b) for underground storage tank may be required by the local agency. 7 .3 7-4