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(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)(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)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)(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)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)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 (608) 224-4942, 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)(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)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)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(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)2.
2. Single-wall piping systems shall have at least one of the following leak detection methods:
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)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.:
ATCP 93.510(4)(b)2.
2. Leak detection may be omitted for suction piping that meets all of the following requirements:
ATCP 93.510(4)(b)2.b.
b. The below-grade piping is sloped so that the contents of the pipe will drain back into the storage tank if the suction is released.
ATCP 93.510(4)(b)2.d.
d. The check valve is visibly located directly below and as close as practical to the suction pump.
ATCP 93.510(4)(c)
(c)
Inventory control as leak detection. Piping connected to a tank using inventory control in accordance with sub.
(3) (d) shall comply with one of the following:
ATCP 93.510 History
History: CR 17-092: cr.
Register October 2019 No. 766, eff. 11-1-19; correction in (3) (d) (intro.) made under s.
35.17, Stats.,
Register October 2019 No. 766.
ATCP 93.515(1)(a)(a) Leak detection methods for tank systems shall meet the requirements of this section.
ATCP 93.515(1)(b)
(b) The leak detection test information reports submitted to the department, or maintained on site as required in s.
ATCP 93.500 (9), shall include at least all of the following:
ATCP 93.515(1)(b)1.
1. Site information including the name of the business, the street address, and the municipality in which the site is located.
ATCP 93.515(1)(b)2.
2. Tank system information including the department-assigned tank identification number, the site identification number designated by the owner or operator, the tank capacity, the product in the tank, the type of pipe system, and whether there are pipe manifolds in the tank system.
ATCP 93.515(1)(b)3.
3. Test method information including the name of the method or equipment used, the material approval number as issued under s.
ATCP 93.130, the date the test was performed, the threshold value used to declare a leak, the rate of volumetric change, whether the final result was a pass or fail, and the name and certification of the technician performing the test.
ATCP 93.515(2)(a)(a)
General methodology. Inventory control that is used as the leak detection method shall be conducted in accordance with API 1621 and with this subsection.
ATCP 93.515(2)(b)
(b)
Prescriptive requirements. Product inventory control shall be conducted monthly and reconciled to detect a leak rate of at least 0.5 percent of throughput on a monthly basis, in the following manner:
ATCP 93.515 Note
Note: A leak rate of 0.5 percent is equal to 5 gallons out of every 1,000 gallons of throughput.
ATCP 93.515(2)(b)1.
1. Inventory volume measurements for inputs, withdrawals, and the amount still remaining in the tank shall be recorded each operating day.
ATCP 93.515(2)(b)2.
2. The equipment used shall be capable of measuring the level of product over the full range of the tank's height to the nearest one-eighth of an inch.
ATCP 93.515(2)(b)3.a.a. The inputs shall be reconciled with delivery receipts by measurement of the tank inventory volume before and after delivery.
ATCP 93.515(2)(b)3.b.
b. Where tanks are interconnected by a manifold, reconciliation may address all of the interconnected tanks as a group rather than as individual tanks.
ATCP 93.515(2)(b)4.
4. The measurement of any water level in the bottom of the tank shall be electronically or manually gauged to the nearest one-eighth of an inch at least once a month and recorded.
ATCP 93.515(2)(c)
(c)
Product losses. Tank systems that exceed the losses allowed under par.
(b) for 2 consecutive months shall follow the requirements in ss.
ATCP 93.575 to
93.585 for assessing and responding to a release.
ATCP 93.515(2)(d)
(d)
Precision tightness test. A precision tightness test shall be performed in accordance with sub.
(4) within 10 business days of notification from the authorized agent or the department for any of the following reasons:
ATCP 93.515(2)(d)1.
1. Failure to provide monthly inventory control data for the past 12 months.
ATCP 93.515(2)(d)2.
2. Incomplete or inconsistent data entry reflected during any 2 months of data entry out of the most recent 3 months of inventory control record keeping.
ATCP 93.515(3)(a)1.1. Manual tank gauging may be used as the sole method of leak detection for tanks that have a capacity of 1,000 gallons or less for the life of the tank.
ATCP 93.515(3)(a)2.
2. For tanks that have a capacity of more than 1,000 gallons to 2,000 gallons, manual tank gauging may be used if all of the following conditions are met:
ATCP 93.515(3)(a)2.a.
a. The tank system has a precision tightness test performed in accordance with sub.
(4) at least once every 5 years from the date of installation until the tank is ten years old.
ATCP 93.515(3)(a)2.c.
c. The piping either receives an annual precision tightness test or has electronic line leak detection testing, and this tightness test or leak detection testing is performed in accordance with the capabilities specified in s.
ATCP 93.130 (3) (b).
