ATCP 93.515(10) (10) Ullage testing. Tightness testing of the ullage portion shall be performed in one of the following ways:

ATCP 93.515(10)(a) (a) As specified in NFPA 30 section 21.5, by or under the direct supervision of a certified installer or tank system tightness tester.

ATCP 93.515(10)(b) (b) By or under the direct supervision of a certified tank system tightness tester, with leak detection equipment and methods as approved under s. ATCP 93.130 that measure the tightness of the ullage portion.

ATCP 93.515(11) (11) Ordered conversion of leak detection methodology.

ATCP 93.515(11)(a) (a) The authorized agent or the department may order an operator, in writing, to terminate the use of a leak detection method and convert to an approved electronic methodology with history-generation capabilities for any of the following reasons:

ATCP 93.515(11)(a)1. 1. The operator has a history of failing to perform monthly leak detection for a total of 6 months or more during a 24 month period, or for 3 consecutive months.

ATCP 93.515(11)(a)2. 2. Statistical inventory reconciliation reports reflect pass for a total of 6 months or more during the preceding 24 months, or for 3 consecutive months, and the data points are not consistent with the material approval criteria in s. ATCP 93.130.

ATCP 93.515(11)(a)3. 3. The operator fails to review monthly leak-detection reports as required by the applicable leak detection method under this section.

ATCP 93.515(11)(a)4. 4. The operator enters data into an inventory record that is not supported by actual probe-generated data.

ATCP 93.515(11)(b) (b) The operator shall complete a conversion under par. (a) within 30 days of the date of the order or as determined by the department. Daily inventory verification as specified in s. ATCP 93.503 (2) is acceptable as a temporary monthly leak detection method during the conversion period.

ATCP 93.515 Note Note: Failure to provide monthly leak detection in accordance with this subsection beyond the 30-day period or compliance date as determined by the department may result in immediate shutdown under s. ATCP 93.115 (3) (a) 2.

ATCP 93.515 History History: CR 17-092: cr. Register October 2019 No. 766, eff. 11-1-19; correction in (6) (L), (11) (a) 1., 2. made under s. 35.17, Stats., Register October 2019 No. 766.

ATCP 93.517 ATCP 93.517 Airport hydrant system requirements.

ATCP 93.517(1) (1) General.

ATCP 93.517(1)(a) (a) Airport hydrant system installations shall comply with release reporting, response and investigation, closure, financial responsibility and notification requirements in accordance with this section.

ATCP 93.517(1)(b) (b) New installations shall meet the plan review requirements in accordance with s. ATCP 93.100.

ATCP 93.517(1)(c) (c) New or existing installations shall meet the requirements of subch. V unless specified otherwise in this section.

ATCP 93.517(2) (2) Airport hydrant system plans and requirements.

ATCP 93.517(2)(a) (a) For new airport hydrant systems, leak detection plans shall be submitted to the department before the system becomes operational in accordance with s. ATCP 93.100.

ATCP 93.517(2)(b) (b) Fuel hydrant leak detection plans shall include all of the following:

ATCP 93.517(2)(b)1. 1. A description of the airport hydrant system.

ATCP 93.517(2)(b)2. 2. A description of the leak detection method used.

ATCP 93.517 Note Note: A designer of an airport hydrant leak detection system who does not have a financial interest in the airport may be considered to be the independent third party that is required in s. ATCP 93.130 (3) (b) 1. for leak detection methods.

ATCP 93.517(2)(b)3. 3. A schedule for testing the system.

ATCP 93.517(2)(b)4. 4. Any limitations of the leak detection method.

ATCP 93.517(2)(b)5. 5. An action plan in the event a leak is detected.

ATCP 93.517(2)(c) (c) Owners and operators of underground piping systems associated with airport hydrant systems shall meet leak detection requirements in accordance with s. ATCP 93.510, or use one or a combination of the following alternative methods of release detection:

ATCP 93.517(2)(c)1. 1. Perform a semiannual or annual tightness test at or above the piping operating pressure in accordance with the following system volume:

ATCP 93.517(2)(c)1.a. a. Fuel systems with less than 50,000 gallons are not to exceed one gallon per hour for semiannual testing or 0.5 gallons for annual testing.