Okla. Admin. Code § 165:25-3-6.29

Current through Vol. 42, No. 7, December 16, 2024

Section 165:25-3-6.29 - Monitoring requirements for piping

Underground piping that routinely contains regulated substances must be monitored for releases in a manner that meets the following requirements:

(1)Pressurized piping.

(A) All underground piping that conveys regulated substances under pressure must be equipped with a mechanical or electronic line leak detector installed and operated in accordance with this Chapter.

(B) New installations and facilities replacing a piping system must have a sump sensor, float or similar mechanical device at each tank, transition, and dispenser sump. Sensors should be mounted near the bottom of the sump(s) and accessible for annual testing.

(C) New installations and facilities replacing a piping system must have double-walled piping. The interstitial area of the piping must be open inside the sumps to allow fuel to drain into the sumps in the event that a leak occurs.

(D) The underground pressure piping from the master dispenser to the satellite must be designed and installed so that the satellite piping is tested by the automatic line leak detector. An annual line tightness test is required on the satellite underground piping.

(2)Suction piping.

(A) Suction piping installed after July 1, 2008 must be double-walled piping. The interstitial area of the piping must be open inside the sumps to allow fuel to drain into the sumps in the event that a leak occurs.

(B) New installations and facilities replacing a piping system must have a sump sensor, float or similar mechanical device at each tank, transition, and dispenser sump. Sensors should be mounted near the bottom of the sump(s) and accessible for annual testing.

(3)Methods of release detection for pressurized piping. Each method of release detection for piping must be done in accordance with the following requirements.

(A) Mechanical line leak detectors and annual line tightness testing.

(i) An annual function test of the operation of the leak detector must be conducted by simulating a leak.

(ii) A hydrostatic line tightness test must be done annually by a licensed tester. The product line(s) must be hydrostatically tested by a NWGLDE approved testing device capable of detecting a leak of 0.10 gallons per hour at one and one-half times the operating pressure and tested in accordance with the testing devices third party certification.

(B) Sump sensors with automatic line leak detectors.

(i) Double walled piping with sump sensors, floats or similar mechanical devices at each sump may be used in lieu of annual line tightness testing except at marinas where a line tightness test is required by April 1st of each year.

(ii) The sump sensors, floats or other mechanical devices used must be tested annually by a licensed tester. This test must be scheduled in the established online format prior to testing. Sensors status and alarm history reports must be printed and retained or an interstitial monitoring form used every thirty (30) days for systems installed after July 1, 2008.

(iii) An annual function test of the operation of the leak detector must be conducted by a licensed tester simulating a leak.

(C) Electronic line leak detection. A certified electronic line leak detector may be used in lieu of a mechanical line leak detector and annual tightness test only if:

(i) The system is capable of detecting and tests for a leak of three (3) gallons per hour before or after each operation of the submersible turbine pump; and

(ii) The system is capable of detecting and tests for a leak of 0.2 or 0.1 gallons per hour at least once every thirty (30) days; and

(iii) The system is capable of detecting and tests for a leak of 0.1 gallons per hour annually, AND the system is function tested annually by simulating a leak, and if necessary, calibrated.

(4)Methods of release detection for suction piping.

(A) Safe Suction Piping. No release detection is required for suction piping installed on or prior to July 1, 2008 if it is designed and constructed to meet (i) through (iv) below:

(i) The below-grade piping operates at less than atmospheric pressure.

(ii) 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.

(iii) One (1) check valve is included in each suction line.

(iv) The check valve is located directly below and as close as is practical to the suction pump.

(B) Tri-annual Line Tightness Testing. Underground piping that conveys regulated substances under suction must have a line tightness test conducted at least every three (3) years by a licensed tester.

(C) Sump sensors.

(i) Double walled piping with sump sensors, floats or similar mechanical devices at each sump may be used in lieu of tri-annual line tightness testing except at marinas where a line tightness test is required by April 1st of each year.

(ii) The sump sensors, floats or other mechanical devices used must be tested annually by a licensed tester according to manufacturer's requirements. This test must be scheduled in the established online format prior to testing. Sensors status and alarm history reports must be printed and retained or an interstitial monitoring form used every thirty (30) days for systems installed after July 1, 2008.

Okla. Admin. Code § 165:25-3-6.29

Amended and renumbered from 165:25-3-6 at 23 Ok Reg 2261, eff 7-1-06; Amended at 25 Ok Reg 1867, eff 7-1-08

Amended by Oklahoma Register, Volume 32, Issue 23, August 17, 2015, eff. 8/27/2015

Amended by Oklahoma Register, Volume 34, Issue 24, September 1, 2017, eff. 9/11/2017

Amended by Oklahoma Register, Volume 35, Issue 24, September 4, 2018, eff. 10/1/2018

Amended by Oklahoma Register, Volume 36, Issue 21, July 15, 2019, eff. 8/1/2019

Amended by Oklahoma Register, Volume 39, Issue 24, September 1, 2022, eff. 10/1/2022

Amended by Oklahoma Register, Volume 41, Issue 23, August 15, 2024, eff. 10/1/2024