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 Note Note: The approval criteria in s. ATCP 93.130 include capability of detecting a leak rate of 0.1 gallons per hour.

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(4)(c) (c) Precision tightness testing of double-wall underground product piping shall include testing of both the inner and outer wall.

ATCP 93.515(4)(d) (d) Precision tightness testing shall be recorded on the department’s tank precision tightness testing form, TR-WM-152, or line tightness testing form, TR-WM-125, as applicable and shall be maintained onsite in accordance with s. ATCP 93.500 (9) (a). Alternative forms may be used with the permission of the department.

ATCP 93.515(5) (5) Automatic tank gauging. Automatic tank gauging shall meet all of the following requirements:

ATCP 93.515(5)(a) (a)

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 12 inches from the fill pipe and the submersible pump.

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, associated piping, or sumps used for interstitial monitoring that are being tested.

ATCP 93.515 Note Note: See s. ATCP 93.130 (3) (b) 1. for approval requirements for automatic tank gauges.

ATCP 93.515(5)(c) (c) Automatic tank gauges shall be programmed to provide an audible and visual alarm in the event of a tank or line test failure, a periodic monthly tank or line test not performed within a 30-day interval, or a tank or line interstitial sensor actuation. Manual operator action shall be needed to silence the alarm.

ATCP 93.515(6) (6) Statistical inventory reconciliation.

ATCP 93.515(6)(a) (a) Leak detection methods based on the application of statistical principles to inventory data shall meet the requirements of 40 CFR § 280.43 (h) including:

ATCP 93.515(6)(a)1. 1. Report a quantitative result with a calculated leak rate;

ATCP 93.515(6)(a)2. 2. Be capable of detecting a leak rate of 0.2 gallon per hour or a release of 150 gallons within 30 days; and

ATCP 93.515(6)(a)3. 3. Use a threshold that does not exceed one-half the minimum detectable leak rate.

ATCP 93.515(6)(b) (b) Tank systems or portions of tank systems using statistical inventory reconciliation as the primary method of leak detection shall be monitored and evaluated for leaks at least every 30 days with a conclusive result of pass or fail within the 30-day monitoring period.

ATCP 93.515(6)(c) (c) The daily tank system product inventory records shall be kept current and shall be maintained on site.

ATCP 93.515(6)(d) (d) Tank product level measurements shall be recorded using an electronic inventory probe or an automatic tank gauge.

ATCP 93.515(6)(e) (e) The operator shall have an effective process to submit their data to the vendor according to the vendor requirements for producing an evaluation report within the 30-day monitoring period.