1. (1) General.

   1. (a) Aboveground tanks. This section applies to aboveground storage tank systems for fueling operations at a farm premises or construction project.
   2. (b) Limitations on location and type of use. The tanks may not be used for fueling vehicles unless the vehicles are dedicated to the operation of the farm premises or construction project.

   3. (c) Specifications for tanks.

      1. 1. The tanks shall be constructed in accordance with s. ATCP 93.250 and this section.
      2. 2. Nozzles on gravity systems may not have a latch-open device.
      3. 3. There is no minimum required setback between the tank and the dispenser.
   4. (e) Security. The tank system shall be equipped so the hose, hanger, or outlet valve can be locked to prevent tampering.

2. (2) Modifications to NFPA 30a and exemptions.

   1. (a) Farming operations. For farming operations, the tank and the fueling operation shall be placed outside of a building and at least 40 feet from the near side of a public way and from a building or structure used for any of the following purposes:

      1. 1. Human occupancy.
      2. 2. Housing of any livestock.
      3. 3. Storage or repair of any motor-driven vehicle or machine.
      4. 4. Storage of chemicals, pesticides, or other fuels.
      5. 5. Storage of hay or similar crops susceptible to spontaneous combustion if stored in a combustible building or structure.
   2. (c) Operations using secondary containment tanks. All operations within the scope of this section using a tank with secondary containment shall follow the setback requirements in Table 93.630.

   3. (d) Irrigation operations.

      1. 1. A tank that supplies a combustion engine in an irrigation system shall be located on land or on a pier of the solid-fill type.
      2. 2. The tank shall be mounted to maintain stability against vibration, wind, water-saturated ground, and floodwater and shall be liquid-tight.
      3. 3. Where a tank is at an elevation that may produce a gravity head-pressure or siphon pressure, the tank outlet shall be equipped with a device, such as a normally closed solenoid valve, which will prevent gravity or siphon flow from the tank to the engine. This device shall be located adjacent to and downstream of the tank outlet valve. The device shall be installed and adjusted so that liquid cannot flow by gravity or siphon from the tank to the engine if the fuel piping, tubing, or hose system fails when the engine is not in use.

      4. 4. The fuel piping, tubing, or hose system connecting the tank to the engine shall comply with all of the following:

         1. a. Be compatible with the fuel.
         2. b. Be constructed, supported, and protected against physical damage and stresses arising from impact, settlement, vibration, expansion, contraction, wave action, and wildlife.
         3. c. Be of a type that is designed to withstand the forces and pressures exerted upon it, including from any motion of the engine or a pier.
         4. d. Be liquid-tight.
         5. e. Have a valve at the tank to shut off the liquid supply from the tank.

3. (4) Tanks of 5,000 gallons or more. Aboveground tanks which have a capacity of 5,000 gallons or more shall comply with all of the following:

   1. (a) Tank listing. The tank shall be listed and labeled for aboveground use.

   2. (b) System design and location. The tank system shall comply with the specifications for dispensing facilities in s. ATCP 93.615 (5), with the following exceptions:

      1. 1. The tank system and the fueling operation shall be located in accordance with Table 93.630.
      2. 2. Vehicle collision protection may be omitted where a dike complying with this chapter is provided for secondary containment.

      3. 3. Tanks under this paragraph are exempt from the enclosure requirement in s. ATCP 93.615 (5) (o).

         Table 93.630

         Tank System Setbacks for Tanks with Secondary Containment

         - See PDF for table

   3. (c) Administrative requirements.

      1. 1. The tank system shall be installed in accordance with the manufacturer’s instructions, the applicable national standards adopted in s. ATCP 93.200, plans and specifications approved under s. ATCP 93.100 and this chapter.
      2. 2. The tank system installation shall be performed or supervised by a certified installer.
      3. 3. The tank system shall be inspected in accordance with s. ATCP 93.115 (2).
      4. 4. The tank shall be registered in accordance with s. ATCP 93.140.

History

History: CR 17-092: cr. Register October 2019 No. 766, eff. 11-1-19; correction in (3) (h) made under s. 35.17, Stats., Register October 2019 No. 766; CR 24-034: am. (1) (a), (c) 1., r. (1) (d), am. (2) (a), r. (2) (b), (3), am. (4) (title), (intro.), Table 93.630 Register October 2025 No. 838, eff. 11-1-25.