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