ATCP 93.517(3)(a) (a) The owner of a newly installed airport hydrant system shall notify the implementing agency and register the system in accordance with s. ATCP 93.140.

ATCP 93.517(3)(b) (b) All owners of airport hydrant systems shall provide proof of financial responsibility in accordance with s. ATCP 93.700.

ATCP 93.517(4) (4) System requirements.

ATCP 93.517(4)(a) (a) All new airport hydrant systems shall be designed and equipped with isolation valves appropriate for leak testing.

ATCP 93.517(4)(b) (b) Any repair or upgrade to an existing airport hydrant system shall include the installation of isolation valves in the section that is repaired or upgraded.

ATCP 93.517(5) (5) Periodic inspections and walkthroughs. Owners and operators must inspect the following additional areas for airport hydrant systems at least once every 30 days if confined space entry according to the occupational safety and health administration is not required, or at least annually if confined space entry is required:

ATCP 93.517(5)(a) (a) Hydrant pits—visually check for any damage; remove any liquid or debris; and check for any leaks; and

ATCP 93.517(5)(b) (b) Hydrant piping vaults—check for any hydrant piping leaks.

ATCP 93.517 History History: CR 17-092: cr. Register October 2019 No. 766, eff. 11-1-19; correction in (2) (c) 2. b., c., 4. made under s. 35.17, Stats., Register October 2019 No. 766.

ATCP 93.520 ATCP 93.520 Corrosion protection.

ATCP 93.520(1) (1) General.

ATCP 93.520(1)(a) (a) Where required. Vent lines, vapor lines and any portion of a single or double-wall tank system, whether new or existing, that routinely contains product and is in contact with the ground or with water shall be protected from corrosion by one of the following methods:

ATCP 93.520(1)(a)1. 1. The tank and piping are constructed of an inherently corrosion-resistant material.

ATCP 93.520(1)(a)2. 2.

ATCP 93.520(1)(a)2.a. a. The tank and piping are installed at a site that is determined by a certified corrosion expert to be non-corrosive during the operational life of the system.

ATCP 93.520(1)(a)2.b. b. A certified corrosion expert retained for the purpose of determining a non-corrosive site shall make at least one personal visit to each tank site during the design stage.

ATCP 93.520 Note Note: See ATCP Table 93.200–5 for information on contacting NACE.

ATCP 93.520(1)(a)3. 3. The tank is a listed composite or jacketed tank designated as complying with UL 1746, and the piping is protected by one of the methods in this subsection.

ATCP 93.520 Note Note: In addition to composite and jacketed tanks, the UL 1746 standard also includes requirements for coated tanks and tanks with pre-engineered cathodic protection systems. These last 2 types of cathodic protection are not included in the blanket approval under this section.

ATCP 93.520(1)(a)4. 4. The tank and piping are protected with a sacrificial anode system in accordance with a standard developed by a nationally recognized association or independent testing laboratory that is acceptable to the department.

ATCP 93.520(1)(a)5. 5.

ATCP 93.520(1)(a)5.a. a. The tank and piping are protected with a corrosion protection system designed by a certified corrosion expert and comply with either sub. (2) or (3).

ATCP 93.520(1)(a)5.b. b. A corrosion expert retained for the purpose of designing an impressed current corrosion protections system shall make at least one personal visit to each tank site during the design stage.

ATCP 93.520(1)(b) (b) Design and construction.

ATCP 93.520(1)(b)1. 1. To allow for periodic testing, new and replacement factory- or field-installed corrosion protection systems shall have appropriate connections, insulated lead wires and accessible test stations, including as specified in subds. 2. and 3.

ATCP 93.520(1)(b)2. 2. All lead wires connected to a tank, anode, reference electrode, or other component associated with the corrosion protection system shall terminate at a test station.

ATCP 93.520(1)(b)3. 3. The termination of each lead wire at a test station shall be clearly labeled or coded to identify the specific component to which it is connected.

ATCP 93.520(1)(b)4. 4. Impressed current systems shall be designed to prevent stray current conditions that may negatively impact other underground structures, utility lines, or cable anchors, or any impressed current systems protecting those items.

ATCP 93.520(1)(b)5. 5. Local utilities shall be notified by the contractor when impressed current systems are installed, repaired, or adjusted, including where an increase in rectifier amperage or voltage output occurs.