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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 sol- <br /> um source or a vacuum pump powered by umn vacuum cannot be attained, the spill bucket <br /> an exploslon-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 /> from the venturi-eductor or outside any 3.After 1 minute,record the ending vacuum level. <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 /> 0-30'Water Cotumn 6.4.6 Pass/Fall 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 6.4. 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 till often serve as the leak detection monitoring loca- <br /> pipe. If the spill bucket is damaged, notify the tion for double-walled piping systems. Leakage <br /> owner/operator. from the primary containment typically flows by <br /> gravity inside the secondary containment to the <br /> 3.Attach the test apparatus to the test port. <br /> pei.org <br />