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Recommended Practices for the Testing and Verification of Spill, Overfill, Leak Detection and Secondary Containment Equipment at LIST Facilities • vacuum test apparatus (The test apparatus may 4 . Connect the line from the vacuum source to the be available from the spill-bucket manufacturer. test apparatus . It includes an air pressure regulator, a vacuum 5. If the spill bucket is found to have cracks , loose source, a vacuum gauge with a minimum 0- 30 parts or separation of the bucket from the fill inch water column range , a test fitting and a pipe , it is not considered to be liquid-tight. This control valve . The control valve is used to adjust visually indicates a test failure . the vacuum level . ) ; • stopwatch or other time-measurement device 6 . 4 . 5 Test Procedure . capable of measuring a 1 -second increment. 1. Slowly apply a vacuum of 15 inches water column to the spill bucket interstitial space and WARNING• Use only an air-operated vacu- close the control valve . If a 15 -inch water Col - um source or a vacuum pump powered by umn vacuum cannot be attained, the spill bucket an explosion-proof motor. Vacuum pumps fails the test. See Appendix B for pressure and with electric motors that are not explo- vacuum conversions . sion-proof may ignite flammable vapors . 2 . Start the time-measurement device and record If a portable air compressor is used , it the initial vacuum level shown on the gauge . should be located at least 20 feet away from the venturi-eductor or outside any 3 . After 1 minute, record the ending vacuum level . Class I , Division 1 area . Upon completion of the test, release the vacuum , remove the test apparatus and restore the spill Vacuum bucket to its normal operating condition . Source Control Valve o - s0° Water Column 6 . 4. 6 Pass/ Fail Criteria . If the ending vacuum � Vacuum Gauge level is 12 inches water column or greater, the spill bucket passes the test . Regulator If the ending vacuum level is less than 12 inches water column , the spill bucket fails the test. 6 . 5 Containment Sump Integrity Testing. CAUTION : Gaining access to the contain- ment sump requires removing the lid , cover or dispenser panel that is in place to protect the equipment in the sump . These components can be heavy. They may require special handling and more than FIGURE 64 . Check lines and connections to ensure one person to remove them . Use caution that they are leak-tight before starting the test. when moving and replacing them when testing is complete . During the test , put the covers and panels in a safe location 6 . 4. 4 Preparation . where they are secure and isolated from 1. Remove and properly dispose of any liquid and vehicle and customer traffic . debris (leaves , sediment and trash) in the spill bucket. 6 . 5 . 1 General . Containment sumps are liquid- 2 . Clean the spill bucket and examine it for dam- tight structures designed to temporarily contain age . Make sure that it is free of cracks , loose leaks or spills . In addition , containment sumps parts or separation of the bucket from the fill often serve as the leak detection monitoring loca- pipe . If the spill bucket is damaged, notify the tion for double-walled piping systems . Leakage pipe , If spill from the primary containment typically flows by owngravity inside the secondary containment to the 3 . Attach the test apparatus to the test port . pei . org