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
1 Requires precision tightness testing every 5 years. This method is only allowed until the tank is 10 years old.
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 NoteNote: 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)1.1. No more than 30 days may elapse between monthly monitoring tests using an automatic tank gauge. 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)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(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.
