Laserfiche WebLink
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 g. 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 al"perated vacu- close the control valve. If a 154nch water col- <br /> um so4rce .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 /> sio"roof 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 venturimeductor 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 Column 6.4.6 Pass/Fall Criteria. If the ending vacuum <br /> Vacuum Gauge 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 /> 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 />