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Recommended Practices for the. Testing and Verification of Spill, Overfill, Leak Detection and Secondary Containment Equipment at UST Facilities <br /> mary containment of secondarily contained spill <br /> WARNING : Use only an ata-operated vacu- <br /> buckets. <br /> um source or a vacuum pump powered by <br /> 6.3. 2 Description of Test . Using a specially an explosion-proof motor, Vacuum pumps <br /> equipped test cover, a partial vacuum is applied to with electric motors that are not expio- <br /> the spill buckel . Tbe vacuum level is monitored for slon-proof may unite flammable vapors. <br /> a I - minute period . if ai portable air compressor Is used , it <br /> should be located at least 20 feet away <br /> 6.3 .3 Test Equipment. Test equipment shall from the venturl-eductor or outside any <br /> include: Class I , Division 1 area . <br /> • Vacuum test apparatus ( The test apparatus may <br /> lie available from the spill bucket manufacturer. 6 , 3 .4 Preparation . <br /> It includes an air pressure regulator, a vacuum <br /> source, a vacuum gauge with a minimum 0-50 1. Remove and properly dispose of any liquid and <br /> inch water column rnniye and u control valve. The debris (leavers, sediment and trash ) in the spill <br /> control valve is used to adjust the vacuum level . ) ; bucket. Clean the spill bucket and examine it for <br /> • Test ever (The cover is equipped wish a test damage, defects or improperly installed compo- <br /> nents. If there are loose components ( erg. , loose <br /> fitting' )' band clamps or botts ), tighten these items before <br /> • Plumber's plug (appropriate size, if used) ; performing the integrity test. If there are items <br /> • Stopwatch or other tlrfte- measurement device <br /> that must be repaired or replaced ( e .g. , deterio- <br /> capable of measuring a I -second increment : rated gaskets/seals or drain valves) , notify the <br /> owner/operator to obtain approval before pro- <br /> + Gasketing material (The purpose of the gas- needing with the needed repairs . <br /> keting material is to provide an air-tight seal <br /> between the test cover and the spill bucket, ). 2. Examine die fill cap and adapter fitting for <br /> loose, missing, or damaged parts and make nec- <br /> essary repairs . Made sure that the seal on the fill <br /> o - SW Water Column cap is present and in good condition . The cap <br /> Vacuum Vacuum Gauge must fit securely and be leak-fight on the riser. <br /> Source A leaking cap will result in a failed test . As an <br /> alternative to a tight fill cap, use a plumber ' s <br /> plug in the fill riser. <br /> Control <br /> Valva 3. The spill bucket drain valve , if present, must be <br /> leak- tight to pass the test. if the drain valve is <br /> not leak- tight , it may be removed and perma- <br /> nently plugged. <br /> NOTE: Before permanently plugging, ensure <br /> that local regulations allow the drain valve to <br /> Plumber's Plug w <br /> Tank Riser Pipe be permanently plugged . <br /> 4. Clean any contamination from the top surface <br /> of the spill bucket where the cover makes a seal <br /> and line it with gasketing material . <br /> 5. Place the test cover on the spill bucket, corn - <br /> firming that it makes a tight seal with the gasda <br /> keting material . <br /> FIGURE 64. The cover must make a tight seal with the 6. Connect the line from the vacuum source to the <br /> spill bucket to prevent leakage when the vacuum is adapter on the cover. � <br /> pulled during the test. <br /> - _ - _— -- 7 . if the spill bucket is found to have cracks, loose <br /> pants or Separation of (lie bucket from the till <br /> pel , org <br />