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Recornmended Practices for the Testing and Verification of Spill,Overfill,I eak Detention and Secondary Containment Fquipment at UST Facilities f Z miry containment of secondarily contained spill WARNING: Use only an air-operated vacu huckets. um source or a vacuum pump powered by 6.3.2 Description of Test. Clsing 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. 'lest equipment shall from the venturi-eductor or outside any include: Class I, Division 1 area. • Vacuum test apparatus (The test apparatus may he 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 colulrul range and a control valve.The debris (leaves, sediment and U ash) in the spill control valve is used to adjust the vacuum level.); bucket.Clean the spi II bucket and examine it for • Test cover (The cover is equipped with a test damage, defects or improperly installed compo- fitting.); vents. If there are loose components (e.g., loose band clamps or bolts),tighten these items before • P'lumber's plug (appropriate size, if used); performing (he integrity test. If (here 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- • Gaskcting material (The purpose of the gas- ceeding with the needed repairs. kestng material is to provide an air-tight seal 2 between the test cover and the spill bucket). . Examine the fill cap and adapter filling for loose, n-dssmg 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 _ ;7. 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 he leak-tight to pass the test. If the drain valve is not leak-tight, it may he removed and perlria- nently plugged. NOTE: (Before permanently plugging, ensure Plumber's Plug in that local regulations allow the drain valve to Tank Riser Pipe he permanently plugged. 4.Clean any contamination from the top surface of the spill bucket.where the cover makes a seal and line it with Basketing 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. The cover must make a tight seal with the 6.Connect the line 11.0111 the VaCUU111 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 10