ATCP 93.400(2)(b)4.b.b. The 12-inch maximum in subd. 4. a. may be exceeded where structural fire resistance is provided that complies with NFPA 30 section 22.5.2.4. ATCP 93.400(2)(c)(c) Underground piping. All new and existing underground piping connected to an aboveground tank shall be protected from corrosion using one of the methods in s. ATCP 93.520 (1). ATCP 93.400(2)(d)1.1. Aboveground tank systems equipped with a new sacrificial anode or impressed current corrosion protection system shall follow the installation, operation, maintenance and testing requirements in s. ATCP 93.520. ATCP 93.400(2)(d)2.2. Existing sacrificial anode or impressed current corrosion protection systems shall follow the operation, maintenance and testing requirements in s. ATCP 93.520. ATCP 93.400(3)(a)(a) When any underground piping is installed as part of a new tank system or when 50 percent or more of a run is replaced, the piping shall be provided with approved secondary containment with approved non-discriminating interstitial monitoring, except as specified in par. (g). ATCP 93.400(3)(b)1.1. The material used for fabricating both the primary and secondary containment shall be listed in accordance with a standard that assures liquid- and vapor-tightness. ATCP 93.400(3)(b)2.2. Secondary containment sumps shall be fabricated and installed in a manner that prevents release of liquids. These sumps shall be tested for leaks hydrostatically at installation, in accordance with the manufacturer’s instructions and the adopted standard PEI RP 1200. ATCP 93.400(3)(c)(c) All pipe connections at a dispenser for motor vehicle fueling that are installed or replaced on or after February 1, 2009, shall be placed within a secondary containment sump at the time of installation or replacement, except as exempted in par. (e). ATCP 93.400(3)(d)(d) All pipe connections at a dispenser for motor vehicle fueling that were in existence or under construction before February 1, 2009, shall be placed within a secondary containment sump by January 1, 2021, except as exempted in par. (e). ATCP 93.400(3)(e)(e) A secondary containment sump is not required under the pipe connections at a dispenser if the storage tank system meets all of the following conditions: ATCP 93.400(3)(e)2.2. The dispenser and all the pipe connections at the dispenser are on or above a surface that is at least as impermeable as concrete. ATCP 93.400(3)(f)(f) All pipe connections at a transition between aboveground and underground piping that are installed or replaced on or after February 1, 2009, shall be placed within a secondary containment sump at the time of installation or replacement. ATCP 93.400(3)(g)(g) Secondary containment is not required for underground piping that is evaluated and maintained in accordance with API 570, by organizations that maintain or use an authorized inspection agency, a repair organization, and technically qualified piping engineers, inspectors and examiners, all as defined in API 570. ATCP 93.400(3)(h)1.1. Secondary containment sumps provided under this subsection shall have non-discriminating electronic sensors that will detect liquids in the sump, unless approved otherwise by the department. ATCP 93.400(3)(h)2.2. Piping that is installed or replaced on or after August 1, 2009, at secondary containment sumps provided under this subsection may not pass through the bottom of the sump. ATCP 93.400(3)(h)3.3. All electrical conduit and wiring that is installed or replaced on or after August 1, 2009, at secondary containment sumps provided under this subsection for dispensers shall pass over the top of the sump wall rather than through the wall or bottom of the sump. ATCP 93.400 NoteNote: This subsection recognizes dispenser pans, spray-on liners, brushed-on liners, formed-in-place containment products, and other effective secondary containment practices that are currently in use.
ATCP 93.400(4)(a)(a) All new and existing underground piping connected to an aboveground tank shall be provided with approved leak detection in accordance with s. ATCP 93.510 (4), except as specified in par. (c). ATCP 93.400(4)(b)(b) Leak detection in accordance with par. (a) shall be installed immediately at the time of new installation or replacement of pipe. ATCP 93.400(4)(c)1.1. Piping over 4 inches in diameter shall follow the plan and system requirements and deadlines in s. ATCP 93.517, except as specified in subd. 2. Leak detection for piping of 4 inches in diameter or less may be provided as specified in subd. 2. only if approved in writing by the department. ATCP 93.400(4)(c)2.2. Leak detection for piping may consist of evaluations that are performed in accordance with API 570, by organizations that maintain or use an authorized inspection agency, a repair organization, and technically qualified piping engineers, inspectors and examiners, all as defined in API 570.