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Recommended Practices for the Testing and Verification of Spill , Overfill, Leak Detection and Secondary Containment Equipment at UST Facilities mary containment of secondarily contained spill buckets . WARNINQa : 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 s➢on-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 sball from the venturi-eductor or outside any include : Class I , Division 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 minimutn 0-50 L 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 equipped - pped with a test damage, defects or improperly installed compo ' fitting , ) , nents. If there are loose components (e. g: , loose g ' ) ' band clamps or bolls) , tighten these items before • Plumber ' s plug (appropriate size, if used) ; performing the integrity test. If there are items • 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 air tight seal between the test cover and the spill bucket. ) . 2. Examine the fill cap and adapter filling for loose, missing or damaged parts and make nec- essary repairs . Make sure that the seal on the fill o - so" Water column cap is present and in good condition. The cap Vacuum Vacuum Gauge must fit securely and be leak-tight on the riser. Source _ .'T: 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 3 . The spill bucket drain valve, if resent, must be Valve p p leak-tight to pass the test. If the drain valve is not leak- tight, it may be removed and perma- nently plugged. NOTE: Before ermanentl lu in ensure P yP gg g � that local regulations allow the drain valve to Plumber's PlugIn. ? Tank Riser Plea ; be permanently plugged. 4. Clean any contamination from the top surface do do do do of the spill bucket where the cover makes a seal and line it withasketin material. do to g g 5. Place the test cover on the spill bucket, con - do to firming that it makes a tight seal with the gas- keting material . FIGURE 6-2. The cover must make a tight seal with the 6 . Connect the line from the vacuum source to the spill bucket to prevent leakage when the vacuum Is adapter on the cover. pulled during the test. 7 . If the spill bucket is found to have cracks , loose parts or separation of the bucket from the fill pei . org