ATCP 93.520(1)(d)1. 1.

ATCP 93.520(1)(d)1.a. a. All new and existing corrosion protection for UST systems shall be tested within 6 months of installation or repair and at least annually, except as provided in subd. 3.

ATCP 93.520(1)(d)1.b. b. For sacrificial anode systems, structure-to-soil potential readings shall be conducted with a minimum of one local potential measurement near the UST center and away from the anodes and one remote potential measurement. Alternatively, a minimum of three potential measurements, one at each of the UST ends and one near the center of the UST, may be taken.

ATCP 93.520 Note Note: This requirement is from NACE standard TM-0101.

ATCP 93.520(1)(d)1.bm. bm. For impressed current systems, structure-to-soil potential readings shall be conducted with a minimum of three potential measurements, one at each of the UST ends and one near the center of the UST.

ATCP 93.520 Note Note: This requirement is from NACE standard TM-0101.

ATCP 93.520(1)(d)1.c. c. For each product line, structure-to-soil potentials shall be taken above the piping, at the ends and middle, away from the anode locations. Piping runs over 50 feet shall have additional readings taken every 25 feet.

ATCP 93.520(1)(d)1.d. d. For impressed current systems, the annual test shall include instant-off potentials.

ATCP 93.520(1)(d)2. 2. In addition to the requirements in subd. 1., impressed current corrosion protection systems shall be inspected and evaluated by the site operator at least every 60 days to ensure the equipment is providing adequate current in accordance with its design.

ATCP 93.520(1)(d)3. 3. Tanks designated as sti-P3® equipped with a preinstalled sacrificial anode system and test station shall be tested in accordance with all of the following:

ATCP 93.520(1)(d)3.a. a. Testing shall occur within 6 months of installation and at least every 3 years thereafter until the tank is 10 years old.

ATCP 93.520(1)(d)3.b. b. Testing shall occur annually in accordance with subd. 1. after the tank is 10 years old.

ATCP 93.520(1)(d)4. 4. The results of the inspections, evaluations and testing under this paragraph shall be summarized on the department’s form, TR-WM-141, and retained at the site in accordance with s. ATCP 93.500 (9).

ATCP 93.520 Note Note: Form TR-WM-141, UST Corrosion Protection Test/Survey Report, is available from the Bureau of Weights and Measures, PO Box 8911, Madison, WI 53708-8911, or at telephone [phone], or from the Bureau’s Web site at https://datcp.wi.gov/Pages/Programs_Services/PetroleumHazStorageTanks.aspx.

ATCP 93.520 Note Note: Section ATCP 93.500 (9) specifies retention requirements for testing and repair records of corrosion protection systems.

ATCP 93.520(1)(e) (e) Certifications for corrosion protection.

ATCP 93.520(1)(e)1. 1. A certified cathodic protection tester shall be on the site to supervise and monitor the initial post-installation start-up of impressed current corrosion protection systems.

ATCP 93.520 Note Note: NACE requires a person with Senior Corrosion Technologist certification or higher for corrosion protection system commissioning.

ATCP 93.520(1)(e)2. 2. A certified cathodic protection tester shall perform or supervise the performance of reinstallation or replacement of anodes.

ATCP 93.520 Note Note: NACE requires a person with Level 1 Cathodic Protection Tester certification or higher for reinstallation or replacement of anodes.

ATCP 93.520(1)(e)3. 3.

ATCP 93.520(1)(e)3.a. a. All new and existing corrosion protection for UST systems shall be tested by a certified cathodic protection tester, except as provided in subd. 3. b.

ATCP 93.520 Note Note: NACE requires a person with corrosion technologist certification or higher or a person with corrosion technician certification who is directly supervised by a certified corrosion technologist or higher to perform work as a state-certified cathodic protection tester.

ATCP 93.520(1)(e)3.b. b. Tanks designated as sti-P3® shall be tested by a person holding a certification from the Steel Tank Institute or one of the certifications in subd. 3. a.

ATCP 93.520 Note Note: Additional information on corrosion protection certifications is available from the department’s Web site at https://datcp.wi.gov/Pages/Programs_Services/PetroleumHazStorageTanks.aspx.

ATCP 93.520(2) (2) Sacrificial anode systems.

ATCP 93.520(2)(a) (a) General. All new and existing sacrificial anode systems shall maintain the standard protection threshold reading of at least negative 850 millivolts or shall comply with the requirements of par. (b).

ATCP 93.520(2)(b) (b) Failing sacrificial anode systems.

ATCP 93.520(2)(b)1. 1. Unless arrangements are made with the authorized agent or the department to conduct follow-up testing, the cause of the failure shall be investigated and repaired within 90 days of the failed reading; or the entire tank system shall be emptied within 90 days of the failed reading and shall remain empty until the repair is completed.