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Oklahoma Administrative Code (Last Updated: March 11, 2021) |
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TITLE 165. Corporation Commission |
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Chapter 25. Underground Storage Tanks |
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Subchapter 2. General Requirements for Underground Storage Tank Systems |
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Part 3. DESIGN AND INSTALLATION |
SECTION 165:25-2-40. Installation testing
Latest version.
- (a) All tanks must be tested with air pressure prior to installation, and/or tested according to manufacturer's specifications. Pressure must not exceed 5 pounds per square inch (psi). The entire tank must be soaped during this period and inspected for bubbling.(b) All suction piping must be tested while disconnected from the tank, pumps, and dispensing units. The piping must be subjected to an air test with the following specifications:(1) The piping must be subjected to an air test of at least 50 psi for a period of one hour.(2) All piping joints must be soaped while the system is under pressure, in order to detect any possible leaks.(3) As an alternative to the preceding methods in (1) and (2) above, the piping may be subjected to a vacuum test while connected to tanks, pumps and dispensing units.(c) Pressurized piping must be tested while connected to tanks and pumps. The piping must be subjected to an air test of at least 50 psi.(1) Air test secondary piping for a period of one hour, using the test pressure prescribed by the piping manufacturer.(2) Apply soap solution to all joints and piping surfaces and inspect for leaks.(d) All piping should be air tested and monitored continuously during the installation.(e) Tightness (also called precision) testing of the entire system must be performed after all paving over the tanks and piping has been completed and before the system is placed in operation:(1) A precision tightness test must be performed by a certified tester, and in accordance with manufacturer's instructions; or(2) The following alternative to a precision tightness test will be accepted, but only if conducted before the system is put into service:(A) A certified ATG capable of detecting a leak of 0.10 gallons per hour must be used to test the filled portion of the tank and(B) A precision tightness test of the ullage portion of the tank must be completed.(3) Testing of both interstice and primary tank of a double wall tank as specified by tank manufacturer must be performed.(4) Primary tank openings, manways and risers must be tested during the installation of all double wall tanks.(5) 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 with a test pressure of 50 psi or 1½ times the operating pressure, whichever is greater. The lines must be tested for a minimum of one hour.(6) Mechanical and electronic leak detector(s) must be tested for function by simulating a leak and operate in accordance with manufacturer's specifications.(7) If an ATG system with electronic line leak detector(s) is installed, it must complete a leak detector test in each of the modes in which it is certified as capable of detecting a leak (e.g. 3 gph, 0.2 gph and 0.1 gph).(8) Containment sumps must be tested after all piping and conduit has been installed along with spill prevention equipment (spill buckets) by using vacuum, pressure, or liquid testing in accordance with one of the following criteria:(A) Requirements developed by the manufacturer (owners and operators may use this option only if the manufacturer has developed requirements);(B) Code of practice developed by a nationally recognized association or independent testing laboratory, e.g., PEI RP 1200.