Wisconsin Legislature: ATCP 93.400(5)(a)1.

(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).

(d) Designed corrosion protection systems.

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.

2. Existing sacrificial anode or impressed current corrosion protection systems shall follow the operation, maintenance and testing requirements in s. ATCP 93.520.

(3) Secondary containment for piping.

(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).

(b)

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.

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.

(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).

(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).

(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:

1. All piping is aboveground and readily accessible for inspection.

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.

(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.

(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.

(h)

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.

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.

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.

Note: 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.

(4) Leak detection for piping.

(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).

(b) Leak detection in accordance with par. (a) shall be installed immediately at the time of new installation or replacement of pipe.

(c)

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.

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.

(5) Installation.

(a)

1. The installation of shop-built tanks and associated piping shall be performed or supervised by a certified installer under s. ATCP 93.240 (16).

2. A certified installer shall verify that the installation of the electrical components for a tank system does not conflict with this chapter, except this verification is not required for the electrical criteria in ch. SPS 316.

(b)

1. All installation shall be in accordance with the manufacturer’s instructions, the applicable national standards adopted in s. ATCP 93.200, and plans and specifications approved under s. ATCP 93.100 and this chapter.

2. All tank and pipe systems that are installed on or after November 1, 2019, including replacement systems, shall undergo all of the following before the tank and pipe systems are placed into service:

a. Pressure testing that shall assure that the tank, pipe, and all connections are tight in accordance with PEI RP200 sections 6.6 and 9.6 and chapter 14.

b. Pre-operational testing and inspection in accordance with PEI RP200 chapter 14.

(c) Single wall horizontal-cylindrical and rectangular aboveground storage tanks shall be installed to allow full visual inspection of the outer tank shell, except for any portion of the shell that is in contact with a support for it.

(d) The foundations for all types of tanks shall be designed to minimize the possibility of uneven settling and to minimize corrosion in any part of the tank resting on the foundation.

(e) Tank supports shall be placed on a prepared, flat, compacted surface.

(em) Vent piping shall meet the requirements of NFPA 30 Subchapter 27.8 except the termination height of normal vent piping for Class II and Class III liquids shall be a minimum of 4 feet above the ordinary snow line.

(f) Upon completion of any installation of new or replacement shop-built tanks or piping, or any modification or upgrade thereto that requires plan approval or registration, the certified installer shall provide the authorized agent or the department with a completed tank installation checklist, form TR-WM-120.

Note: Form TR-WM-120 - Checklist for Aboveground Storage Tank Installation is available from the Bureau of Weights and Measures, PO Box 8911, Madison, WI 53708-8911, or at telephone (608) 224-4942, or from the Bureau’s Web site at https://datcp.wi.gov/Pages/Programs_Services/PetroleumHazStorageTanksForms.aspx.

(6) Moving shop-built tanks. Aboveground shop-built tanks that are moved from one location to another shall meet all of the following requirements, except for tanks covered in s. ATCP 93.610:

(a) The tank shall meet all the plan review, installation, and registration requirements in this chapter for the new location.

(b) If the tank contained Class I liquids, it shall be rendered free of flammable vapors before the move and maintained vapor-free until placed into service at the new location.

(c) If the tank is relocated to a property with a different street address, a revised tank registration, form TR-WM-118 or TR-WM-153, and part A of a tank system service and closure assessment report, form TR-WM-140, shall be completed and submitted to the department for the former location.

Note: Form TR-WM-118 — Aboveground Flammable/Combustible/Hazardous Liquid Storage Tank Registration; form TR-WM-140 — Tank System Service and Closure Assessment Report; and form TR-WM-153 — Change of Ownership, Flammable/Combustible/Hazardous Liquid Storage Tank Registration are available from the Bureau of Weights and Measures, PO Box 8911, Madison, WI 53708-8911, or at telephone (608) 224-4942. Forms TR-WM-118 and TR-WM-140 are also available from the Bureau’s Web site at https://datcp.wi.gov/Pages/Programs_Services/PetroleumHazStorageTanksForms.aspx.

(cm) If the tank is relocated on the same property, part A of a tank system service and closure assessment report, form TR-WM-140, shall be completed and submitted to the department for the former location.

(d) The tank shall undergo pre-operational testing and inspection in accordance with PEI RP200 chapter 14.

(e) The tank shall have an inspection performed by a certified tank system inspector before being placed into operation.

(f) The tank shall continue to follow the inspection schedule in STI SP001 that was established at the former location.

(7) Aboveground tank marking.

(a)

1. All aboveground tanks, whether new or existing, that store Class I liquids, other than at refineries or at marine, pipeline, or transport terminals, shall have attached the wording, “FLAMMABLE—KEEP FIRE AWAY.”

2. The wording shall be clearly visible and written in letters of a contrasting color at least 5 inches high with a minimum stroke width of one inch.

(b)

1. All aboveground tanks, whether new or existing, that store flammable or combustible liquids shall be labeled in accordance with NFPA 704.

2. The visibility and size of the label shall be in accordance with Table 93.400.

Table 93.400

Tank Labels

- See PDF for table

(8) Maintenance and repairs.

(a) Tanks.

a. All shop-built aboveground steel storage tanks, whether new or existing, shall be maintained and repaired in accordance with STI SP031.

b. All repairs or modifications under STI SP031 shall be recorded on the department’s TR-WM-134 form.

Note: Form TR-WM-134–STI SP031 Tank Repair/Modification Summary, is available from the Bureau of Weights and Measures, P. O. Box 8911, Madison, WI 53708-8911, or at telephone (608) 224-4942, or from the Bureau’s Web site at https://datcp.wi.gov/Pages/Programs_Services/PetroleumHazStorageTanksForms.aspx.

c. A copy of the completed TR-WM-134 form shall be provided to the tank operator.

d. The tank operator shall have the completed TR-WM-134 form on site and available for inspection within 30 days after receiving it from the party that performed the repair, except as provided in sub. (11) (b) 2. for unattended sites.

2. Field-erected aboveground storage tanks shall be maintained and repaired in accordance with API 653.

(b) Other system components.

1. Repairs to any of the following tank system components shall be recorded on the department’s TR-WM-136 form:

a. Below-grade components.

b. Tank containment and piping sumps.

c. Overfill valves and vent whistles.

d. Emergency vents.

e. Normal vent pressure or vacuum valves and flame arrestors.

f. Anti-siphon valves.

Note: Form TR-WM-136–STI SP031 Tank System Repair Report, is available from the Bureau of Weights and Measures, P. O. Box 8911, Madison, WI 53708-8911, or at telephone (608) 224-4942, or from the Bureau’s Web site at https://datcp.wi.gov/Pages/Programs_Services/PetroleumHazStorageTanksForms.aspx.

2. A copy of the completed TR-WM-136 form shall be provided to the tank operator.

3. The tank operator shall have the completed TR-WM-136 form on site and available for inspection within 30 days after receiving it from the party that performed the repair, except as provided in sub. (11) (b) 2. for unattended sites.

1. ‘Interstitial space.’ Any repair that affects any portion of an interstitial space for an AST system shall include testing of the affected portion in accordance with methods prescribed in s. ATCP 93.500 (6) (b) and (c) and PEI RP 200, or other methods approved by the department, to verify that the containment complies with this chapter before that portion is placed back into service.

2. ‘Secondary containment sumps.’ Repair of any secondary containment sumps that are addressed in s. ATCP 93.400 (3) shall include testing in accordance with the methods prescribed in s. ATCP 93.400 (3) (b) before placing the sumps back into service.

3. ‘Overfill prevention equipment.’ Repair of overfill prevention equipment shall include testing in accordance with the methods prescribed in s. ATCP 93.410 (12) before placing the equipment back into service.

(d) Reporting. Repairs that are recorded under par. (a) 1. b. or (b) 1. because of a leak shall be reported to the department within 15 days of the repair.

Note: See ss. ATCP 93.230 (8) to (10) for additional facility maintenance requirements.

(e) Property. Tank yards and diked areas shall be kept free from weeds, high grass, rubbish, and combustible materials that are not essential to the operation and shall be kept clean and orderly.

(9) Facility lighting. Adequate lighting shall be provided for loading, unloading, and dispensing operations.