(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.

(3) for tank systems that transfer, store or treat materials that subsequently become hazardous wastes within two years after the materials become hazardous waste unless the owner or operator complies with section 40 CFR 265.201 and is one of the following:

(1) designed, installed, and operated to prevent any migration of wastes or accumulated liquid out of the system to the soil, groundwater or surface water at any time during the use of the tank system; and

(2) capable of detecting and collecting releases and accumulated liquids until the collected material is removed.

(1) constructed of or lined with materials that are compatible with the wastes(s) to be placed in the tank system and shall have sufficient strength and thickness to prevent failure owing to pressure gradients (including static head and external hydrological forces), physical contact with the waste to which it is exposed, climatic conditions and the stress of daily operation (including stresses from nearby vehicular traffic);

(2) provided with a foundation or base underlying the tanks capable of providing support to the secondary containment system, resistance to pressure gradients above and below the system and capable of preventing failure due to settlement, compression or uplift. This base shall be free of cracks or gaps and sufficiently impervious to contain leaks, spills and accumulated precipitation until the collected material is detected and removed;

(3) provided with a leak-detection system that is designed and operated so that it will detect the failure of either the primary or secondary containment structure or the presence of any release of hazardous waste or accumulated liquid in the secondary containment system within 24 hours, or at the earliest practicable time if the owner or operator can demonstrate to the Department that existing detection technologies or site conditions will not allow detection of a release within 24 hours; and

(4) sloped or otherwise designed or operated to drain and remove liquids resulting from leaks, spills or precipitation. Spilled or leaked waste and accumulated precipitation shall be removed from the secondary containment system within as timely a manner as is necessary to prevent overflow of the containment system, but within no more than 24 hours, or in as timely a manner as possible to prevent harm to human health and the environment, if the owner or operator can demonstrate to the Department that removal of the released waste or accumulated precipitation cannot be accomplished within 24 hours and that overflow of the containment system will not occur.

(1) a liner (external to the tank);

(2) a vault;

(3) a double-walled tank; or

(4) an equivalent device as approved by the Department.

(1) External liner systems shall be:

(2) Vault systems shall be:

(3) Double-walled tanks shall be:

(1) aboveground piping (exclusive of flanges, joints, valves and other connections) that are visually inspected for leaks on a daily basis;

(2) welded flanges, welded joints and welded connections, that are visually inspected for leaks on a daily basis;

(3) sealless or magnetic coupling pumps and sealless valves, that are visually inspected for leaks on a daily basis; and

(4) pressurized aboveground piping systems with automatic shut-off devices (e.g., excess flow check valves, flow metering shutdown devices, loss of pressure actuated shut-off devices) that are visually inspected for leaks on a daily basis.

(1) In deciding whether to grant a variance based on a demonstration of equivalent protection of groundwater and surface water, the Department will consider:

(2) In deciding whether to grant a variance based on a demonstration of no substantial present or potential hazard, the Department will consider:

(3) The owner or operator of a tank system, for which a variance from secondary containment has been granted in accordance with the requirements of subsection (g)(1) of this section, at which a release of hazardous waste has occurred from the primary tank system but has not migrated beyond the zone of engineering control (as established in the variance), shall:

(4) The owner or operator of a tank system, for which a variance from secondary containment has been granted in accordance with the requirements of subsection (g)(1) of this section, at which a release of hazardous waste has occurred from the primary tank system and has migrated beyond the zone of engineering control (as established in the variance), shall:

(1) The Department shall be notified in writing by the owner or operator that the facility intends to conduct and submit a demonstration for a variance from secondary containment as allowed in subsection (g) of this section at least 24 months prior to the date that secondary containment is required to be provided in accordance with subsection (a) of this section; or, if a variance is sought from the requirements of section 66264.193(i)(1), the demonstration shall be submitted to the Department with Part B of the permit application.

(2) As part of the notification, the owner or operator shall also submit to the Department a description of the steps necessary to conduct the demonstration and a timetable for completing each of the steps. The demonstration shall address each of the factors listed in subsection (g)(1) or subsection (g)(2) of this section.

(3) The demonstration for a variance shall be completed within 180 days after notifying the Department of an intent to conduct the demonstration.

(4) If a variance is granted under this subsection, the Department will require the permittee to construct and operate the tank system in the manner that was demonstrated to meet the requirements for the variance.

(1) subsections (c)(2), (c)(4), (e)(1)(A) or (e)(2)(A) (except for tanks that do not contain free liquids), and (e)(1)(B) or (e)(2)(B);

(2) for nonenterable underground tanks, a leak test that meets the requirements of section 66264.191(c)(5) or other tank integrity method, as approved or required by the Department, shall be conducted at least annually;

(3) for other than nonenterable underground tanks, the owner or operator shall either conduct a leak test as in subsection (i)(2) of this section or develop a schedule and procedure for an assessment of the overall condition of the tank system by an independent, qualified professional engineer, registered in California, in accordance with section 66270.11(d). The schedule and procedure shall be adequate to detect obvious cracks, leaks, and corrosion or erosion that may lead to cracks and leaks. The owner or operator shall remove the stored waste from the tank, if necessary, to allow the condition of all internal tank surfaces to be assessed. The frequency of these assessments shall be based on the material of construction of the tank and its ancillary equipment, the age of the system, the type of corrosion or erosion protection used, the rate of corrosion or erosion observed during the previous inspection and the characteristics of the waste being stored or treated;

(4) for ancillary equipment, a leak test or other integrity assessment as approved by the Department shall be conducted at least annually;

(5) the owner or operator shall maintain on file at the facility a record of the results of the assessments conducted in accordance with subsections (i)(2) through (i)(4) of this section;

(6) if a tank system or component is found to be leaking or unfit for use as a result of the leak test or assessment in subsections (i)(2) through (i)(4) of this section, the owner or operator shall comply with the requirements of section 66264.196.

(2) The provisions of subsection (j)(1) of this section apply only to:

(1) designed, installed, and operated to prevent any migration of wastes or accumulated liquid out of the system to the soil, ground water, surface water, or air at any time during the use of the tank system; and

(2) capable of detecting and collecting releases and accumulated liquids until the collected material is removed.

(1) traditional containment of entire system within a bermed containment area with visual and/or electronic leak detection monitoring;

(2) troughs or pipe runs with impermeable liners that incorporate the following:

(3) double-walled piping with continuous interstitial monitoring or monitoring intervals located at low elevation points along pipeline;

(4) Double-walled piping with translucent or transparent sections located at low points or low endpoints so that visual monitoring is possible.

(1) name, address, and EPA identification number of the facility;

(2) date of planned closure;

(3) description of tank system to be closed and form of current authorization for the tank system;

(4) description of how the proposed alternative would provide adequate environmental protection such that the design, installation, and operation will be capable of detecting a release and preventing any migration of wastes or accumulated liquid out of the system to the soil, ground water, surface water, or air at any time during the remaining life of the tank system.