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Recommended practices for the, Testing and Verification of Spill, overfill, Leak Detection and Secondary Containment Equipment at LIST Facilities mary containment of secondarily contained spill buckets . WARNING :Use only an air-operated vacu- um source or a vacuum pump powered by 6.3 .2 Description of Test. Using a specially an explosion-proof motor. Vacuum pumps equipped test cover, a partial vacuum is applied to with electric motors that are not explo- the spill bucket . The vacuum level is monitored for sion-proof may Ignite flammable vapors. a 1 -minute period. if a portable air compressor Is used , it should be located at least 20 feet away 6.3 .3 Test Equipment. Test equipment shall from the venturl-eductor or outside any include : Class I , Dlvlslon 1 area . • Vacuum test apparatus (The test apparatus may be available from the spill bucket manufacturer. 6 . 3 .4 Preparation . It includes an air pressure regulator, a vacuum source, a vacuum gauge with a minimum 0-50 1. Remove and properly dispose of any liquid and inch water column range and a control valve, The debris (leaves, sediment and trash ) in the spill control valve is used to adjust the vacuum level . ) ; bucket. Clean the spill bucket and examine it for • Test cover (The cover is ui pp '�d with a test damage, defects or improperly instaDd compo- nents . If there are loose components ( e.g. , loose fitting. ) ; band clamps or bolts ) , tighten these items before Plumber' s plug (appropriate size, if used), performing the integrity test. If there are item~ • Stopwatch or other time- measurement device that must be repaired or replaced (e .g. , deterio- capable of measuring a I -second increment : rated gaskets/seals or drain valves ), notify the owner/operator to obtain approval before pro- Gasketing material (The purpose of the gas- ceeding with the needed repairs, keting material is to provide an airtight seal 2. Examine the [ill cap and adapter fitting for between the test cover and the spill bucket, ). loose , missing or damaged parts and make nec- essary repairs. Make sure that the Neal on the fill 0 5T water column cap is present and in good condition . The cap Vacuum Vacuum gauge must lit securely and be leak-tight on the riser. Source i A leaking cap will result in a failed test . As an alternative to a tight fill cap, use a plumber ' s - - - plug in the fill riser. Control Valve 3 . The spill bucket drain valve , if present, must be leak- tight to pass the testa if the drain valve is not leak- tight , it may be removed and perma- nently plugged, NOTE: Before permanently plugging, ensure Plumber's Plug in that local regulations allow the drain valve to Tank Riser Pipe be permanently plugged . 4. Clean any contamination from the top surface of the spill bucket „here the cover makes a seal and fine it with gasketing material . 5. Place the test cover on the spill bucket, con - firming that it makes a tight seal with the gas- keting material . FIGURE 6-2. [ lie cover must make a tight seal with the 6. Connect the line from the vacuum source to the spilt bucket to prevent leakage when the vacuum Is adapter on the cover. puffed during the test, 7 . If the spill bucket is found to have cracks, loose parts or separation of the hiivket frorn the fill pei . org