ATCP 93.515(3)(a)(a) Where allowed.
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 1000 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.
ATCP 93.515(3)(a)2.b. b. The tank is less than 10 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).
ATCP 93.515(3)(a)3. 3. Tanks which have a capacity of more than 1000 gallons, to 2,000 gallons and which are more than 10 years old shall be provided with monthly monitoring in accordance with sub. (5), (6) or (7).
ATCP 93.515(3)(a)4. 4. Tanks that have a capacity of more than 2,000 gallons may not use manual tank gauging as the method of required leak detection.
ATCP 93.515(3)(b) (b) Manual tank gauging procedures. Manual tank gauging shall meet all of the following requirements:
ATCP 93.515(3)(b)1. 1. Liquid level measurements shall be taken with a gauge stick that is marked to measure the liquid to the nearest one-eighth of an inch over the full range of the tank's height.
ATCP 93.515(3)(b)2. 2. Tank liquid level measurements shall be taken at the beginning and ending of the test duration periods given in Table 93.515, during which no liquid may be added to or removed from the tank, and shall be based on the average of 2 stick readings taken at both the beginning and ending of the period.
ATCP 93.515(3)(b)3. 3. A leak is suspected and subject to the requirements of ss. ATCP 93.575 to 93.585 if the variation between beginning and ending measurements exceeds the weekly or monthly standards in Table 93.515.
Table 93.515
Test Duration and Standards - See PDF for table PDF
1 Requires precision tightness testing every 5 years. This method is only allowed until the tank is 10 years old.
ATCP 93.515(4) (4)Precision tightness testing.
ATCP 93.515(4)(a)(a) Precision tightness testing shall be conducted in one of the following ways:
ATCP 93.515(4)(a)1. 1. By a certified tank system tightness tester, using methods approved under s. ATCP 93.130 to perform precision tightness testing for tanks or piping.
ATCP 93.515(4)(a)2. 2. With permanently installed leak detection equipment as approved under s. ATCP 93.130 to perform precision tightness testing for tanks or piping.
ATCP 93.515(4)(b) (b) Where a certified tank system tightness tester is used, the tester shall include the date and the beginning and end times in the test results report.
ATCP 93.515(5) (5)Automatic tank gauging. Automatic tank gauging shall meet all of the following requirements:
ATCP 93.515(5)(a)1.1. No more than 30 days may elapse between monthly monitoring tests using an automatic tank gauge.
ATCP 93.515(5)(a)2. 2. Monthly monitoring tests shall have the capabilities specified in s. ATCP 93.130 (3) (b).
ATCP 93.515(5)(a)3. 3. An automatic tank gauge shall be placed in the center of the tank and no closer than 24 inches from the fill pipe and the submersible pump, unless approved otherwise by the department.
ATCP 93.515(5)(b) (b) Automatic tank gauges shall be provided with a printer that provides at least all of the following information:
ATCP 93.515(5)(b)1. 1. The starting date and time and ending date and time of the test.
ATCP 93.515(5)(b)2. 2. The volume of liquid in the tank during the test.
ATCP 93.515(5)(b)3. 3. The measured leak rate in gallons per hour and whether this leak rate indicates a pass or a fail.
ATCP 93.515(5)(b)4. 4. The specific identification of the tank and any associated piping that is being tested.
ATCP 93.515(6) (6)Statistical inventory reconciliation.
ATCP 93.515(6)(a)(a) Operators using statistical inventory reconciliation (SIR) as the primary method of leak detection shall have in effect a process to submit their data to the vendor within 4 business days of the end of the monthly reporting period.
ATCP 93.515(6)(b) (b) The daily tank product inventory records shall be maintained current and be maintained on site.
ATCP 93.515(6)(c) (c) The SIR vendor shall analyze the data and supply a summary report to the operator on a monthly basis.
ATCP 93.515(6)(d) (d) The SIR vendor shall return the summary report to the submitter within 10 business days after the postmark on the submittal.
ATCP 93.515(6)(e) (e) Operators using statistical inventory reconciliation shall review the vendor summary report within 24 hours of receipt. If the summary report indicates a failure, the operator shall take immediate action in accordance with the requirements in ss. ATCP 93.575 to 93.585 for assessing and responding to a release.
ATCP 93.515(6)(f) (f) Operators who receive summary reports that indicate either a failure or inconclusive results, or 1 of each, for 2 out of any 3 consecutive months shall have a precision tightness test performed on the tank system within 7 calendar days of receipt of the report.
ATCP 93.515(6)(g) (g) Statistical inventory reconciliation may not be used as a method of precision tightness testing.
ATCP 93.515(6)(h) (h) Before changing from another method of leak detection to statistical inventory reconciliation, the operator shall provide the department with proof of a precision tightness test completed within the previous 12 months showing the tank system to be tight.
ATCP 93.515(7) (7)Interstitial monitoring. Interstitial monitoring between an underground tank system and a secondary barrier immediately around it may be used only if the system is installed and maintained to detect a leak from any portion of the tank that could contain product, and the system meets one of the following requirements:
ATCP 93.515(7)(a) (a) System testing. Post-installation testing shall be performed on the interstitial monitoring system to verify that the system operates in accordance with the manufacturer's specifications.
ATCP 93.515(7)(b) (b) Double-walled systems. For double-walled systems, the sampling or testing method shall be capable of detecting a leak through the inner wall in any portion of the tank that routinely contains product.
ATCP 93.515(7)(c) (c) Systems with internally fitted liners.
ATCP 93.515(7)(c)1.1. For tank systems with an internally fitted liner, a monitoring system shall be installed that is capable of detecting a leak between the inner wall of the tank and the liner.
ATCP 93.515(7)(c)2. 2. The liner shall be chemically compatible with the substance stored.
ATCP 93.515(7)(d) (d) Systems with a barrier in the excavation zone. Systems with a secondary barrier within the excavation zone shall meet all of the following requirements:
ATCP 93.515(7)(d)1. 1. The testing method shall be capable of detecting a leak between the system and the secondary barrier.
ATCP 93.515(7)(d)2. 2. The secondary barrier around the system shall consist of manufactured material which is impermeable to at least 10-6 cm/sec for the regulated substance stored, and which will direct a leak to the monitoring point, to be detected.
ATCP 93.515(7)(d)3. 3. The liner shall be chemically compatible with the substance stored.
ATCP 93.515(7)(d)4. 4. For cathodically protected tanks, the secondary barrier shall be installed so that it does not interfere with the proper operation of the cathodic protection system.
ATCP 93.515(7)(d)5. 5. The test method shall be designed, installed and maintained so groundwater, soil moisture, and rainfall do not render the method inoperative, so that a leak could go undetected.
ATCP 93.515(7)(d)6. 6. The site shall be investigated to ensure that the secondary barrier is always above groundwater and not in a 25-year flood plain, unless the barrier and monitoring designs are for use under such conditions.
ATCP 93.515(7)(d)7. 7. Monitoring wells shall be clearly marked and secured to avoid unauthorized access and tampering.
ATCP 93.515(8) (8)Methods of leak detection for piping.
ATCP 93.515(8)(a)(a) General. Leak detection for piping shall follow the requirements of s. ATCP 93.510 (4) and this section.
ATCP 93.515(8)(b) (b) Automatic line leak detectors. Underground piping systems serving a storage tank with a submersible pump or pressurized booster pump shall be provided with an automatic line leak detector that alerts the operator to the presence of a leak by restricting or shutting off flow from the pump, when it detects leaks of 3 gallons per hour at 10 pounds per square inch line pressure within 1 hour.
ATCP 93.515(8)(c) (c) Line tightness testing.
ATCP 93.515(8)(c)1.1. In addition to the automatic line leak detection required by par. (b), a periodic precision tightness test of piping shall be conducted in accordance with sub. (4), except as provided in subds. 2 and 3. The test shall be performed by a certified tank system tightness tester.
ATCP 93.515(8)(c)2. 2. Where piping leak detection is installed that has the capability to perform monthly monitoring, a separate precision tightness test is not required.
ATCP 93.515(8)(c)3. 3. Any of the methods in subs. (6) and (7) may be used in lieu of complying with subd. 1. if they are designed and approved under s. ATCP 93.130 to detect a leak from any portion of the underground piping that routinely contains product.
ATCP 93.515(8)(d) (d) Periodic line leak detection equipment testing.
ATCP 93.515(8)(d)1.1. A start-up functionality test of the operation of the leak detector shall be conducted in accordance with the manufacturer's procedures for testing to the leak thresholds in par. (b) by inducing a physical line leak.
ATCP 93.515(8)(d)2. 2. A functionality test of the operation of a mechanical line leak detector shall be conducted annually in accordance with the manufacturer's procedures for testing to the leak thresholds in par. (b) by inducing a physical line leak.
ATCP 93.515(8)(d)3. 3. A functionality test of the operation of an electronic line leak detector shall be conducted at least annually in accordance with the manufacturer's procedures for periodic testing to the leak thresholds in par. (b) by inducing a physical line leak, except as provided in subd. 4.
ATCP 93.515(8)(d)4. 4. A leak shall be introduced to the line system to prove the functionality of the electronic line leak detector unless the manufacturer has an alternate approved or equivalent method for testing whether the detector is functioning as intended by the manufacturer. This testing shall be conducted annually by an individual who has no financial interest in the facility and who is certified by the manufacturer to perform the testing, and it shall include all of the following elements:
ATCP 93.515(8)(d)4.a. a. Review of the test diagnostics for a 3 and 0.2 gallon per hour leak test and the history reports for the leak detector showing monthly leak tests.
ATCP 93.515(8)(d)4.b. b. Verification that the programming parameters are correctly set.
ATCP 93.515(8)(d)4.c. c. Verification that the leak detector is producing normal pump-on pressures, by activating a 3 gallon per hour test from the tank monitor console.
ATCP 93.515(8)(d)4.d. d. Verification that electrical wiring and connections have not deteriorated.
ATCP 93.515(8)(d)4.e. e. Verification that associated sensors are functioning as intended.
ATCP 93.515(9) (9)Other methods. The department may approve other methods of leak detection in accordance with s. ATCP 93.130.
ATCP 93.515 History History: CR 07-029: cr. Register November 2008 No. 635, eff. 2-1-09; CR 09-017: am. (2) (b) 3. b., r. (5) (b) and (c), renum. (5) (d) and (6) (b) to (g) to be (5) (b) and (6) (c) to (h), cr. (6) (b) Register July 2009 No. 643, eff. 8-1-09; correction in (1) (b) (intro.), 3., (2) (c), (3) (a) 2. c., (b) 2., 3., (4) (a) 1., 2., (5) (a) 2., (6) (e), (8) (a), (c) 3., (9) made under s. 13.92 (4) (b) 7., Stats., Register December 2011 No. 672; corrections in (1) (b) (intro.), 3., (2) (c), (3) (a) 2. c., (b) 2., 3., (4) (a) 1., 2., (5) (a) 2., (6) (e), (8) (a), (c) 3., (9) made under s. 13.92 (4) (b) 7., Stats., Register October 2013 No. 694; CR 16-012: am. (2) (d) 2. Register August 2016 No. 728, eff. 9-1-16.
ATCP 93.517 ATCP 93.517Airport hydrant leak detection requirements.
ATCP 93.517(1)(1)General. All new and existing airport fuel hydrant systems shall comply with this section.
ATCP 93.517(2) (2)Leak detection plans. All fuel hydrant systems shall have a leak detection plan that is specifically approved by the department in accordance with s. ATCP 93.130.
ATCP 93.517(3) (3)Plan deadlines.
ATCP 93.517(3)(a)(a) For new fuel hydrant systems, leak detection plans shall be submitted to the department before the system becomes operational.
ATCP 93.517(3)(b) (b) For existing fuel hydrant systems, leak detection plans shall be submitted to the department within 10 years after February 1, 2009.
ATCP 93.517(4) (4)Plan requirements. Fuel hydrant leak detection plans shall include all of the following:
ATCP 93.517(4)(a) (a) A description of the fuel hydrant system.
ATCP 93.517(4)(b) (b) 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 section ATCP 93.130 (3) (b) 1. for leak detection methods.
ATCP 93.517(4)(c) (c) A schedule for testing the system.
ATCP 93.517(4)(d) (d) Any limitations of the leak detection method.
ATCP 93.517(4)(e) (e) An action plan in the event a leak is identified.
ATCP 93.517(5) (5)System requirements.
ATCP 93.517(5)(a)(a) All new fuel hydrant systems shall be designed and equipped with isolation valves appropriate for leak testing.
ATCP 93.517(5)(b) (b) Any repair or upgrade to an existing fuel hydrant system shall include the installation of isolation valves in the section that is repaired or upgraded.
ATCP 93.517(5)(c) (c) Existing fuel hydrant systems shall have isolation valves for leak testing installed within 10 years after February 1, 2009.
ATCP 93.517 History History: CR 07-029: cr. Register November 2008 No. 635, eff. 2-1-09; correction in (2) made under s. 13.92 (4) (b) 7., Stats., Register December 2011 No. 672; correction in (2) made under s. 13.92 (4) (b) 7., Stats., Register October 2013 No. 694.
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Published under s. 35.93, Stats. Updated on the first day of each month. Entire code is always current. The Register date on each page is the date the chapter was last published.