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§ 66265.193 P'RCLAYS CALIFORNIA CODE OF REGUI 'TIONS Title 22 u (4)(A) for those existing tank systems described in subsection above and below die system and capable of preventing failure due to (aX4XB)odthis section for which the age cannot be documented,within settlement,compression,or uplift: eightyears of January 12 1987:but if the age of the facility is greaterthan (3)provided with a leak detection system that is designed and operated seven years as of January 12, 1987.secondarycontainment shall be pro- so that it will detect the failure of either the primary and wrondaryi" vided by the time the facility reaches 15 years of age.orwithin two years tainment stmctum orany release of hazardous waste or accumulated of January 12, 1987,whichever comes later, uid in the secondary containment system within 24 hours,orat the earliest (B)subsection(aX4XA)of this section applies to existing tank sys- practicable time if the existing detection technology or site conditions terns containing RCRA hazardous wastes.unless: will not allow detection of a release within 24 hours: 1.the owner/operatoris aconditionally exempt small quantity genera- (4)sloped orotherwise designed oxoperated todrain and remove liq- tor or a 100 to 1000 kg per month generator,or uids resulting from leaks,spills.or precipitation.Spilled orleaked waste 2.the owner/operator is nor subject to regulation in 40 CFR part 265 and accumulated precipitation shall he removed from the secondarycon- pursuant to an exemption in 40 CFR section 265.1. tainment system within 24 hours,or in as timely a manner as is possible (5XA) for those existing tank systems described in subsection to prevent harm to human health ortheenvironment.ifremoval ofthe re- (aXSXB)of this section for which the age cannot be documented,within leased waste or accumulated precipitation cannot he accomplished with- eight years from July 1. 1991:but if the age of the facility is greater than in 24 hours. seven years as of July 1.1991,secondary containment shall he provided (A)if the collected material is a hazardous waste under chapter I I of by the timethe facility reaches 15 years of age.orwithin two years from thisdivision.it shall be managed as a hazardous waste in accordance with July 1, 1991,whichever comes later. all applicable requirements of chapters 2 through 15 of this division. (B)subsection(aXSXA)of this section applies to. (B)If the collected material is discharged through a point s urce to wa- 1. existing tank systems containing only non-RCRA hazardous ten of the United States.the owner m operatorshall comply with the re- writes,and quirements of sections 301.304,and 402 of the Federal Clean Water Act 2.existing tank systems containing RCRA hazardous wastes,if: (33 U.S.C.sections 1311. 1314 and 1342.respectively).as amended. a.the onvnedoperatoris a conditionally exempt small quantity genera- (C)If the collected material is discharged to Publicly Owned Treat- tor or a 100 to 1000 kg per month generator,or ment Works(POTWs),the owner or operator shall comply with the re- b.the owner/operator is not subject to regulation in 40 CTR Pam 265 quirements of section 307 of the Federal Clean Water Act.as pursuant to an exemption in 40 CTR section 265.1.but the owner/opera- amended(33 U.S.C.section 1317). for is subject to the standards of this article. (D)If the collected material is released to the environment.the owner (6)for tank systems that transfer.store or treat materials that become or operator shall comply with the applicable reporting requirements of hazardous wastes subsequent to the dates indicated below, within the 40 CFR Part 302. time intervals required in subsections(aX I)through(aX5)ol'thissection, (d)Secondary containment fortanks shall include one or more of the except that the date that a material becomes a hazardous waste shall be following devices: used in place of the dates indicated below where these dates appear in (1)a liner(external to the tank); subsections(aXI)through(a)(5)of this section: (2)a vault: { (A)January 12. 1987,for tanks containing RCRA hazardous wastes. (3)a double-welled tank:or unless: (4)an equivalent device as approved by the Department. 1.the owner/operatoris accnditiowuallyexemp small quantity genem- (e)In addition to the mquiremems of subsectioms(h).(c),and(d)of turas defined in 40CFRsectiom 261.5.ora 100to 1(XX)kg permomth gen- thiscectiom.secomdary containment.systemsshall satisfy the following etator as defined in 40 CFR section 265.201,or requirements: 2.the owner/operatoxis not subject to regulation in 40(-Ili pan 265 (1)external liner systems shall he: pursuant to an exemption in 40 CFR section 265.1: (A)desi geed or operated to contain 100 percent of the capacityof the (B)July 1. 1991,for. largest tank within its boundary: 1.tanks containing only nom-RCRA hazardous wastes.and (B)desi gned or operated to prevent run-on and infiltration of precipi- 2.tanks containing RCRA hazardous wastes.if: tatiom into the secondary containment system unless the collection sys- a.the awnedoperstoris a conditionally exempt small quantity genera- tem has sufficient excess capacity.in addition to that required in subsec- tor or a 100 to 1000 kg per month generator.or tion(eX IXA)of this section, to contain mm-on and infiltration.Such b.the owner/operator is not subject to tegulatiost in 40 CFR part 265 additional capacity shall be sufficient to contain runom and infiltration Pursuant to an exemption in 40 CFR section 265.1.but the ownedo(em- of precipitation from a 25-year.24-hour rainfall event; C,P&+ for is subject to the standards of this article. (C)free of emeks or gaps:and (b)Secondary containment systems shall be: (D)designed and installed to completely surround the tank and tocov- 4� (1) designed, installed, and operated to prevent any migration of er all surrounding earth likely to comae intocomtact with the waste if re- wastes or accumulated liquid out of the system to the loll,ground water. leased from the tank(s)(i.e.,capable of preventing lateral as well as verti- or surface water at any time during the use of the tank system:and cal migration of the waste). (2)capable of detecting and collecting releases and accumulated liq. (2)Vault systems shall be: uids until the collected material is removed. (A)designed oroperated tocomtain 100 percent of the capacity of the (c)Tomeet the requirements of subsection(b)of this sectim.second- largest tank within its boundary: s4'containment systems shall be at a minimum: (B)designed oroperared to prevent run-on and infiltration of precipi- (1)constructed of or lined with materials that are compatible with the tation into the secondary containment system unless the collection sys- waste(s)robe placedin the tanksystemand shall havesumcient strength tem has sufficient excess capacity,in addition to that required in subwc- andthicknesstopreventfailuredue topmssure gradients(including static tion (eX2XA)of this section, to contain run-on and infiltration. Such head and external hydrological forces).physical contact with the waste additional capacity shall be sufficient to contain r n o n and infiltratiom to which they are exposed.climatic conditions,the stress of installation. of precipitation from a 25-year.24-hour rainfall event: and the stress of daily operation(including stresses from nearby vehicu- (C)constructed with chemical-resistant water stops in place a` lar traffic): joints(if anyy. . _ (2)plata)on a foundation or base capable of providing support to the secondary containment system and resistance to pressure gradients Page 758.84 Reriaer 06.No.IS X21-a6