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:ornmended Practices for the Testing and Verification of Spill,Overfill, Leak Detection and Secondary Containment Equipment at UST Facilities i requirements stated in this recommended practice are feral statements and may vary. Recommended pres- B■ SPILL BUCKET AND e levels and test durations are addressed in Section 5.7. CONTAINMENT SUMP sing manufacturers'test procedures may differ. TESTING is test can be conducted in sections or as one con- ious pipe depending on the installation. Care should be 6.1 General. Spill buckets and containment sumps for en to ensure that the entire secondary containment of piping system is tested. tank systems are neither intended nor designed for the storage of petroleum products,but rather to contain small i Test Equipment. Test equipment shall include: leaks and spills for short periods of time. This section describes the procedures used to test the integrity of spill :Wert gas source (nitrogen, helium, etc.); buckets and containment sumps to ensure that they do not stopwatch or other time-measurement device capable leak. )f measuring a 1-second increment: 6.2 Spill Bucket Integrity Testing — Hydrostatic est tubing assemblies (Tubing assemblies provide Test Method. access to the beginning and end of the interstitial ;pace.); WARNING: Do not use fuels such as gaso- )ressure gauge with a 15 psig maximum pressure read- line, ESS or diesel as a test fluid because ng with 0.5 increments. they present a serious fire and safety hazard. Gasoline vapors are flammable Test Procedure. and can explode if exposed posed to an ignition f necessary, re-install termination (test) boots at pip- source such as a spark or open flame. If ng terminations. a tank or containment area is not tight, f necessary, connect the tubing assemblies to the sec- using fuel as the test fluid will cause a )ndary containment termination fitting on each end of release into the soil or groundwater. he section of piping to be tested. -onnect the inert gas source and pressure gauge. Jradually pressurize the interstitial space to 5 psig. 'lose the valve and allow the pressure to stabilize. tepressurize to the specified test pressure if necessary. water Level )bserve the pressure for a period of 1 hour. f the piping pressure after I hour is less than the test -ressure,check termination fittings and test assemblies :)r leaks. release the pressure on the system slowly. remove the test equipment. restore the piping to its normal operating condition. All Pass/Fail Criteria. If no pressure change occurs ng the test period, the piping system passes the sec- uy containment integrity test. FIGURE 6-1. The hydrostatic method of determining spill bucket integrity uses water to detect leaks. The sere is any drop in pressure over the test period, the measuring stick must be placed in the same location ng fails the secondary containment integrity test. at the beginning and end of the test period to ensure fere is any increase in pressure over the test period, accurate water levet readings. at the test. pei.org