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PEI/RP1200-17 <br /> pei.org16 <br /> explosion-proof may ignite flammable <br />vapors. If a portable air compressor is <br />used, it should be located at least 20 feet <br />away from the venturi-eductor or outside <br />any Class I, Division 1 area. <br />6.3.4 Preparation. <br />1.Remove and properly dispose of any liquid and <br />debris (leaves, sediment and trash) in the spill <br />bucket. Clean the spill bucket and examine it for <br />damage, defects or improperly installed compo- <br />nents. If there are loose components (e.g., loose <br />band clamps or bolts), tighten these items before <br />performing the integrity test. If there are items <br />that must be repaired or replaced (e.g., deterio- <br />rated gaskets/seals or drain valves), notify the <br />owner/operator to obtain approval before pro- <br />ceeding with the needed repairs. <br />2. Examine the fill cap and adapter fitting for <br />loose, missing or damaged parts and make nec- <br />essary repairs. Make sure that the seal on the fill <br />cap is present and in good condition. The cap <br />must fit securely and be leak-tight on the riser. <br />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 />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 />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, confirm- <br />ing that it makes a tight seal with the gasketing <br />material. <br />6.Connect the line from the vacuum source to the <br />adapter on the cover. <br />7.If the spill bucket is found to have cracks, loose <br />parts or separation of the bucket from the fill <br />pipe, it is not considered to be liquid-tight. This <br />visually indicates a test failure. <br />6.3.5 Test Procedure. <br />1. Slowly apply a vacuum of 30 inches water <br />column to the spill bucket and close the valve. <br />If a 30-inch water column vacuum cannot be <br />attained, the spill bucket fails the test. See <br />Appendix B for pressure and vacuum conver- <br />sions. <br />2.Start the time-measurement device and record <br />the initial vacuum level shown on the gauge. <br />3.After 1 minute, record the ending vacuum level. <br />Upon completion of the test, release the vacuum, <br />remove the test apparatus and the gasketing mate- <br />rial from the spill bucket and replace the original <br />cover. <br />6.3.6 Pass/Fail Criteria. If the ending vacuum <br />level is 26 inches water column or greater, the spill <br />bucket passes the test. <br />If the ending vacuum level is less than 26 inches <br />water column, the spill bucket fails the test. <br />6.4 Double-Walled Spill Bucket Integrity Testing — <br />Vacuum Test Method. <br />6.4.1 Purpose. This method is used to test the <br />integrity of the primary and secondary containment <br />of the double-walled spill bucket. <br />6.4.2 Description of Test. A partial vacuum is <br />applied to the interstitial space between the primary <br />and secondary containment. The vacuum level is <br />monitored for a 1-minute period. <br />6.4.3 Test Equipment. Test equipment shall <br />include: <br />FIGURE 6-3. The vacuum test method can detect a spill <br />bucket leak by measuring the change in vacuum level <br />during the test.