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Recommended Practices for the Testing and Verification of Spill, Overfill, Leak Detection and Secondary Containment Equipment at UST Facilities <br />ing requirements stated in this recommended practice are <br />general statements and may vary. Recommended pres- <br />sure levels and test durations are addressed in Section 5.7. <br />Piping manufacturers' test procedures may differ. <br />This test can be conducted in sections or as one con- <br />tinuous pipe depending on the installation. Care should be <br />taken to ensure that the entire secondary containment of <br />the piping system is tested. <br />5.6 Test Equipment. Test equipment shall include: <br />inert gas source (nitrogen, helium, etc.); <br />stopwatch or other time-measurement device capable <br />of measuring a 1-second increment; <br />test tubing assemblies (Tubing assemblies provide <br />access to the beginning and end of the interstitial <br />space.); <br />pressure gauge with a 15 psig maximum pressure read- <br />ing with 0.5 increments. <br />5.7 Test Procedure. <br />If necessary, re-install termination (test) boots at pip- <br />ing terminations. <br />If necessary, connect the tubing assemblies to the sec- <br />ondary containment termination fitting on each end of <br />the section of piping to be tested. <br />Connect the inert gas source and pressure gauge. <br />Gradually pressurize the interstitial space to 5 psig. <br />Close the valve and allow the pressure to stabilize. <br />Repressurize to the specified test pressure if necessary. <br />Observe the pressure for a period of 1 hour. <br />If the piping pressure after 1 hour is less than the test <br />pressure, check termination fittings and test assemblies <br />for leaks. <br />Release the pressure on the system slowly. <br />Remove the test equipment. <br />Restore the piping to its normal operating condition. <br />5.8 Pass/Fall Criteria. If no pressure change occurs <br />during the test period, the piping system passes the sec- <br />ondary containment integrity test. <br />If there is any drop in pressure over the test period, the <br />piping fails the secondary containment integrity test. <br />If there is any increase in pressure over the test period, <br />repeat the test. <br />6. SPILL BUCKET AND <br />CONTAINMENT SUMP <br />TESTING <br />6.1 General. Spill buckets and containment sumps for <br />tank systems are neither intended nor designed for the <br />storage of petroleum products, but rather to contain small <br />leaks and spills for short periods of time. This section <br />describes the procedures used to test the integrity of spill <br />buckets and containment sumps to ensure that they do not <br />leak. <br />6.2 Spill Bucket integrity Testing — Hydrostatic <br />Test Method. <br />WARNING: Do not use fuels such as gaso- <br />line, E85 or diesel as a test fluid because <br />they present a serious fire and safety <br />hazard. Gasoline vapors are flammable <br />and can explode If exposed to an Ignition <br />source such as a spark or open flame. If <br />a tank or containment area Is not tight, <br />using fuel as the test fluid will cause a <br />release into the soil or groundwater. <br /> <br />Water Level <br /> <br />FIGURE 6-1. The hydrostatic method of determining <br />spill bucket integrity uses water to detect leaks. The <br />measuring stick must be placed in the same location <br />at the beginning and end of the test period to ensure <br />accurate water level readings. <br />pei.org 41)