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Recommended Practices for the Testing and Verification of Spill, Overfill, Leak Detection and Secondary Containment Equipment at UST Facilities 2. Clean the spill bucket and examine it for dam- age. Make sure that it is free of cracks, loose parts or separation of the bucket from the fill pipe. If the spill bucket is damaged notify the owner/operator. 3. Attach the test apparatus to the test port. 4. Connect the line from the vacuum source to the test apparatus. 5. If the spill bucket is found to have cracks, loose parts or separation of the bucket from the fill pipe, it is not considered to be liquid -tight. This visually indicates a test failure. 6.4.5 Test Procedure. 1. Slowly apply a vacuum of 15 inches water column to the spill -bucket interstitial space and close the control valve. If a 15 -inch water col- umn vacuum cannot be attained, the spill bucket fails the test. See Appendix B for pressure and vacuum conversions. 2. Start the time -measurement device and record the initial vacuum level shown on the gauge. 3. After 1 minute, record the ending vacuum level. Upon completion of the test, release the vacuum, remove the test apparatus and restore the spill bucket to its normal operating condition. 6.4.6 Pass/Fall Criteria. If the ending vacuum level is 12 inches water column or greater, the spill bucket passes the test. 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 one person to remove them. Use caution when moving and replacing them when testing is complete. During the test, put the covers and panels in a safe location where they are secure and isolated from vehicle and customer traffic. 6.5.1 General. Containment sumps are liquid - tight structures designed to temporarily contain leaks or spills. In addition, containment sumps often serve as the leak detection monitoring loca- tion for double -walled piping systems. Leakage from the primary containment typically flows by gravity inside the secondary containment to the sump, where it can be easily observed or detected by a sensor. This section describes a hydrostatic test method. There are vacuum test methods available for con- tainment sumps. Consult the manufacturer before performing a vacuum test. NOTE: Follow the manufacturer's instructions when testing the interstitial spaces of double - walled containment sumps. 6.5.2 Purpose. This section describes the prep- aration and procedures to test the integrity of con- tainment sumps to ensure that they do not leak. 6.5.3 Description of Test. The containment sump is filled to the proper level with water. The water level is measured at the beginning and end of the test. 6.5.4 Test Equipment. Test equipment shall include: • water; • measuring stick that is accurate to within 1116 (0.063) inch and of sufficient length; • stopwatch or other time-a-easurement device capable of measuring a I -second increment. 6.5.5 Preparation. 1. Care should be taken when conducting the test in the rain or during freezing weather condi- tions. 2. Remove and properly dispose of any liquid and debris (leaves, sediment and trash) in the con- tainment sump. 3. Inspect the containment sump for damage. Examine all penetration fittings, conduits, junc- tion boxes, caps and risers (if present), and side- wall seams for defects, damage or improperly installed components. If there are loose com- ponents (e.g., loose penetration fitting clamps or missing interstitial space caps), correct these items before performing the integrity test. If pei.org 0