NR 667.0195(1)(1)Secondary containment systems shall be:
NR 667.0195(1)(a)(a) 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.
NR 667.0195(1)(b)(b) Capable of detecting and collecting releases and accumulated liquids until the collected material is removed.
NR 667.0195(2)(2)To meet the requirements of sub. (1), secondary containment systems shall be, at a minimum:
NR 667.0195(2)(a)(a) Constructed of or lined with materials that are compatible with the waste or wastes 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).
NR 667.0195(2)(b)(b) Placed on a foundation or base 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.
NR 667.0195(2)(c)(c) 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.
NR 667.0195(2)(d)(d) Sloped or otherwise designed or operated to drain and remove liquids resulting from leaks, spills, or precipitation. Remove spilled or leaked waste and accumulated precipitation from the secondary containment system within 24 hours, or as promptly as possible, to prevent harm to human health and the environment.
NR 667.0195 HistoryHistory: CR 16-007: cr. Register July 2017 No. 739, eff. 8-1-17.
NR 667.0196NR 667.0196What are the required devices for secondary containment and what are their design, operating and installation requirements?
NR 667.0196(1)(1)Secondary containment for tanks shall include one or more of the following:
NR 667.0196(1)(a)(a) A liner (external to the tank).
NR 667.0196(1)(b)(b) A double-walled tank.
NR 667.0196(1)(c)(c) An equivalent device. Maintain documentation of equivalency at the facility.
NR 667.0196(2)(2)External liner systems shall be:
NR 667.0196(2)(a)(a) Designed or operated to contain 100 percent of the capacity of the largest tank within its boundary.
NR 667.0196(2)(b)(b) Designed or operated to prevent run-on or infiltration of precipitation into the secondary containment system unless the collection system has sufficient excess capacity to contain run-on or infiltration. The additional capacity shall be sufficient to contain precipitation from a 25-year, 24-hour rainfall event.
NR 667.0196(2)(c)(c) Free of cracks or gaps.
NR 667.0196(2)(d)(d) Designed and installed to surround the tank completely and to cover all surrounding earth likely to come into contact with the waste if the waste is released from the tank or tanks (that is, capable of preventing lateral as well as vertical migration of the waste).
NR 667.0196(3)(3)Double-walled tanks shall be:
NR 667.0196(3)(a)(a) Designed as an integral structure (that is, an inner tank completely enveloped within an outer shell) so that any release from the inner tank is contained by the outer shell.
NR 667.0196(3)(b)(b) Protected, if constructed of metal, from both corrosion of the primary tank interior and of the external surface of the outer shell.
NR 667.0196(3)(c)(c) Provided with a built-in continuous leak detection system capable of detecting a release within 24 hours.
NR 667.0196 HistoryHistory: CR 16-007: cr. Register July 2017 No. 739, eff. 8-1-17.
NR 667.0197NR 667.0197What are the requirements for ancillary equipment? Provide ancillary equipment with secondary containment (for example, trench, jacketing double-walled piping) that meets the requirements of s. NR 667.0195, except for:
NR 667.0197(1)(1)Above ground piping (exclusive of flanges, joints, valves, and other connections) that are visually inspected for leaks on a daily basis.
NR 667.0197(2)(2)Welded flanges, welded joints, and welded connections that are visually inspected for leaks on a daily basis.
NR 667.0197(3)(3)Seal less or magnetic coupling pumps and seal less valves, that are visually inspected for leaks on a daily basis.
NR 667.0197(4)(4)Pressurized above ground piping systems with automatic shut-off devices (for example, 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.