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Title 22, California Code of Regulations §66265.193. Containment and Detection of Releases. • Note History (a) In order to prevent the release of hazardous waste or hazardous constituents to the environment, secondary containment that meets the requirements of this section shall be provided (except as provided in subsections (f) and (g) of this section): (1) for all new tank systems or components, prior to the tank system or component being put into service; (2) for all existing tank systems which have been used to transfer, store or treat EPA Hazardous Waste Nos. F020, F021, F022, F023, F026, and F027, within two years after the dates indicated below: (A) January 12, 1987, for tanks containing RCRA hazardous wastes, unless: 1. the owner or operator is a conditionally exempt small quantity generator as defined in 40 CFR section 261.5, or a 100 to 1000 kg per month generator as defined in 40 CFR section 265.201, or 2. the owner or operator is not subject to regulation in 40 CFR part 265 pursuant to an exemption in 40 CFR section 265.1; (B) July 1, 1991, for tanks containing RCRA hazardous wastes, if: 1. the owner or operator is a conditionally exempt small quantity generator or a 100 to 1000 kg per month generator, or 2. the owner or operator is not subject to regulation in 40 CFR part 265 pursuant to an exemption in 40 CFR section 265.1, but the owner or operator is subject to the standards of this article. (3) for those existing tank systems of known and documentable age, within two years after the dates indicated below, or when the tank systems have reached 15 years of age, whichever comes later: (A) January 12, 1987, for tanks containing RCRA hazardous wastes, unless: 1. the owner or operator is a conditionally exempt small quantity generator as defined in 40 CFR section 261.5, or a 100 to 1000 kg per month generator as defined in 40 CFR section 265.201, or 2. the owner or operator is not subject to regulation in 40 CFR part 265 pursuant to an exemption in 40 CFR section 265.1; (B) July 1, 1991, for: 1. tanks containing only non-RCRA hazardous wastes, and 2. tanks containing RCRA hazardous wastes, if: a. the owner or operator is a conditionally exempt small quantity generator or a 100 to 1000 kg per month generator, or b. the owner or operator is not subject to regulation in 40 CFR part 265 pursuant to an exemption in 40 CFR section 265.1, but the owner or operator is subject to the standards of this article. (4)(A) for those existing tank systems described in subsection (a)(4)(B) of this section for which the age cannot be documented, within eight years of January 12, 1987; but if the age of the facility is greater than seven years as of January 12, 1987, secondary containment shall be provided by the time the facility