ATCP 93.505(3)(b)2. 2. The testing in subd. 1. may be omitted for a spill containment basin that has continuous electronic pressure, vacuum, liquid-filled interstitial monitoring in addition to double-wall construction, if the monitoring system is tested at installation to verify that it operates in accordance with the manufacturer’s specifications.

ATCP 93.505(3)(b)3. 3. Spill-containment basin tightness testing shall be performed by a person with no personal or monetary interest in the facility and whose employer has no personal or monetary interest in the facility.

ATCP 93.505(3)(b)4. 4. Any spill-containment basin with a tear, crack, or hole shall be replaced with equipment meeting the criteria for new spill containment.

ATCP 93.505(3)(b)5. 5. When a spill-containment basin replaced under subd. 2. has an obvious or suspected release or when an initial basin is installed on a preexisting tank on or after November 1, 2019, an assessment shall be performed in accordance with ss. ATCP 93.580 to 93.585.

ATCP 93.505 History History: CR 17-092: cr. Register October 2019 No. 766, eff. 11-1-19; correction in (2) (intro.), (a) 3., (3) (b) 1. (intro.), 2. made under s. 35.17, Stats., and correction in (2) (intro.), (3) (b) 5. made under s. 13.92 (4) (b) 14., Stats., Register October 2019 No. 766.

ATCP 93.510 ATCP 93.510 Leak detection requirements.

ATCP 93.510(1) (1) General.

ATCP 93.510(1)(a) (a) All new and existing underground tank systems used to store regulated substances shall be provided with a method of leak detection that complies with this section and s. ATCP 93.515, except as exempted in par. (d).

ATCP 93.510(1)(b) (b) The method of leak detection shall be approved in accordance with s. ATCP 93.130.

ATCP 93.510(1)(c) (c) All monitoring equipment used to satisfy the requirements of this section shall be installed, calibrated, operated, and maintained to perform as originally intended in accordance with the manufacturer’s instructions and the department’s approval as issued under s. ATCP 93.130.

ATCP 93.510(1)(d) (d) Leak detection is not required for any of the following tanks:

ATCP 93.510(1)(d)1. 1. Tanks which have a capacity of less than 1,100 gallons and which are located on farm premises or at private residences.

ATCP 93.510(1)(d)2. 2. Tanks storing Class IIIB liquids that are neither petroleum nor CERCLA-listed products.

ATCP 93.510(1)(e) (e) If a tank system exhibits a continuing pattern of failing and then not failing leak detection testing, a precision tightness test shall be performed within 10 business days in accordance with s. ATCP 93.515 (4), and if a tank system fails to pass that test, the site shall be assessed for the presence of a release in accordance with ss. ATCP 93.575 to 93.585.

ATCP 93.510 Note Note: This section primarily addresses the leak detection that is required on a routine, ongoing basis during normal operation of an underground storage tank system. Several other sections of this chapter require additional UST leakage or tightness testing.

ATCP 93.510(2) (2) Annual equipment verification.

ATCP 93.510(2)(a) (a) The following equipment shall be verified by a qualified person every 12 months for the same degree of operability and capability as when the equipment was newly installed using either requirements developed by the manufacturer, or code of practice developed by a nationally recognized association in Table 93.200.

ATCP 93.510(2)(a)1. 1. Equipment for measuring product levels that is used for manual tank gauging or statistical inventory reconciliation.

ATCP 93.510(2)(a)2. 2. Automatic tank gauging equipment used for monthly monitoring, statistical inventory reconciliation or precision tightness testing.

ATCP 93.510(2)(a)3. 3. Interstitial monitoring equipment.

ATCP 93.510(2)(a)4. 4. Sensors used to detect leaks in tanks, lines or sumps.

ATCP 93.510(2)(a)5. 5. Overfill prevention equipment automatic high-level alarm at 90 percent tank capacity and automatic overfill prevention shut off device at 95 percent capacity. The automatic overfill prevention device does not have to be removed from the tank if designed to be tested in place by the manufacturer and the manufacturer provides a test procedure that includes verification of operation and shut off level at 95 percent tank capacity.

ATCP 93.510(2)(b) (b) Under this subsection, a qualified person is a person certified by the equipment manufacturer as being trained in the operational characteristics of the equipment.

ATCP 93.510(2)(c) (c)

ATCP 93.510(2)(c)1. 1. Annual monitoring equipment certification shall be made on the department’s underground tank system functionality verification form, TR-WM-139, and on the department’s electronic-mechanical line leak detector annual functionality form, TR-WM-123, and line test report form, TR-WM-125, if applicable and shall be maintained onsite in accordance with s. ATCP 93.500 (9) (a).

ATCP 93.510(2)(c)2. 2. If all deficiencies found during the equipment verification have not been corrected, the first page of the TR-WM-139 form shall be sent to the department email address on the form within 5 business days of the completion of the verification.

ATCP 93.510 Note Note: Form TR-WM-123, Electronic/Mechanical Line Leak Detector Annual Functionality, Form TR-WM-125, Line Tightness Test Report, and Form TR-WM-139, Underground Tank System Functionality Verification, are 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. See s. ATCP 93.165 for use of alternate forms approved by the department.

ATCP 93.510(3) (3) Leak detection for tanks.

ATCP 93.510(3)(a) (a) General.