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.

ATCP 93.510(3)(a)1. 1. Tanks shall be monitored at least every 30 days for leaks using one of the methods listed in s. ATCP 93.515, except as provided in subd. 2. and s. ATCP 93.500 (1) (a).

ATCP 93.510(3)(a)2. 2. Tanks installed prior to February 1, 2009, that have a capacity of 1,000 gallons or less may use manual tank gauging conducted in accordance with s. ATCP 93.515 (3) as the sole means of leak detection provided it is performed weekly.

ATCP 93.510 Note Note: Under s. ATCP 93.500 (1) (a), continuous electronic interstitial monitoring is generally required for all secondary containment installed on or after February 1, 2009.

ATCP 93.510(3)(b) (b) Failed tests. If a passing test using monthly monitoring is not achieved, the site shall be assessed for the presence of a release in accordance with ss. ATCP 93.575 to 93.585.

ATCP 93.510(3)(c) (c) Inconsistent results. The authorized agent or the department may require a precision tightness test to be performed where any of the following events occur:

ATCP 93.510(3)(c)1. 1. A tank system is accumulating water for no apparent reason.

ATCP 93.510(3)(c)2. 2. A leak detection method is providing erratic results.

ATCP 93.510(3)(c)3. 3. A tank system is tested with multiple leak detection methods that show different results.

ATCP 93.510(3)(d) (d) Inventory control as leak detection. Tank systems installed prior to February 1, 2009, may use monthly inventory control performed in accordance with s. ATCP 93.515 (2) as leak detection provided all of the following conditions are met:

ATCP 93.510(3)(d)1. 1. The tank is 10 years old or less.

ATCP 93.510(3)(d)2. 2. The tank has precision tank tightness testing performed in accordance with s. ATCP 93.515 (4) at least once every 5 years from the date of installation until the tank is 10 years old.

ATCP 93.510(3)(d)3. 3. The tank system has corrosion protection in accordance with s. ATCP 93.520.

ATCP 93.510(4) (4) Leak detection for piping.

ATCP 93.510(4)(a) (a) Pressurized piping. Underground piping that conveys regulated substances under pressure shall comply with all of the following requirements:

ATCP 93.510(4)(a)1. 1. The system shall be equipped with an automatic line leak detector in accordance with s. ATCP 93.515 (8) (b).

ATCP 93.510(4)(a)2. 2. Single-wall piping systems shall have at least one of the following leak detection methods:

ATCP 93.510(4)(a)2.a. a. An annual precision tightness test in accordance with s. ATCP 93.515 (4).

ATCP 93.510(4)(a)2.b. b. Monthly monitoring to the 0.2 gallon per hour rate.

ATCP 93.510(4)(a)3. 3. Double-wall piping systems shall use one of the leak detection methods in subd. 2., or statistical inventory reconciliation, or continuous interstitial monitoring, except as provided in s. ATCP 93.500 (1) (a).

ATCP 93.510 Note Note: Under s. ATCP 93.500 (1) (a), continuous electronic interstitial monitoring is generally required for all secondary containment installed on or after February 1, 2009.

ATCP 93.510(4)(a)4. 4. If a passing test using monthly monitoring is not achieved, the site shall be assessed for the presence of a release in accordance with ss. ATCP 93.575 to 93.585.

ATCP 93.510(4)(b) (b) Suction piping.

ATCP 93.510(4)(b)1. 1. Piping which conveys regulated substances under suction and which is not entirely visible shall use one of the following leak detection methods, except as provided in subd. 2.: