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PEUM 200 -12 <br /> pipe, it is not considered to be liquid-tight. This and secondary containment. The vacuum level is <br /> visually indicates a test failure. monitored for a I -minute period. <br /> 6 .3 . 5 Test Procedure . 6.4. 3 Test Equipment . Test equipment shall <br /> 1Y apply Slowl 1 a vacuum of 30 inches water include: <br /> column to the spill bucket and close the valve. vacuum test apparatus (The test apparatus may <br /> If a 304tich water column vacuum cannot be be available from the spill-bucket manufacturer. <br /> attained, the spill bucket fails the test. See It includes an air pressure regulator, a vacuum <br /> Appendix B for pressure and vacuum convey- source, a vacuum gauge with a minimum 0-30 <br /> sionst inch water column range, a test fitting and a <br /> 2. Start the time-measurement device and record control valve. The control valve is used to adjust <br /> the initial vacuum level shown on the gauge. the vacuum level.) ; <br /> 3. After I minute, record the ending vacuum level , stopwatch or other time-measurement device <br /> capable of measuring a I -second increment. <br /> Upon completion of the test, release the vacuum, <br /> remove the test apparatus and the gasketing mate WARNING• Use only an air-operated vacu- <br /> Tial from the spill bucket and replace the original um source or a vacuum pump powered by <br /> cover. an explosion-proof motor. Vacuum pumps <br /> with electric motors that are not explo- <br /> ��' : sion- roof may Ignite flammable vapors , <br /> ' t 'x'a;}'j '• ','ic` ' ;7 .;`,°: "' > If a portable air compressor is used , It <br /> j+ u should be located at least 20 feet away <br /> from the venturi-eductor or outside any <br /> " r Class 1 , Division 1 area. <br /> Vacuum <br /> Source Control Valve <br /> �t7 0 - 30' Water Column <br /> Vacuum Gauge <br /> t ;,;'.�,`,yti_t�Js,',� k`.r.'fih > . , �r .. fi��.;`i� ,�:'1� •'�;,,;, < F:r,.43'r.� d; Stti� + r4 t T�: <br /> Regulator <br /> FIGURE 6.3. The vacuum test method can detect a spill <br /> bucket leak by measuring the change in vacuum levet <br /> during the test. 7 ? <br /> Vl't <br /> t § [ N hs <br /> 6.3.6 Pass/Fail Criteria. If the ending vacuum <br /> level is 26 inches water column or greater, the spill <br /> i �4 F, 41s S' <br /> bucket passes the test. Vt <br /> If the ending vacuum level is less than 26 inchesj} <br /> water column , the spill bucket fails the test. <br /> 6.4 Double-Walled Spill Bucket Integrity Testing — FIGURE 6-4. Check lines and connections to ensure <br /> Vacuum Test Method . that they are leak-tight before starting the test. <br /> 6 .4.1 Purpose . This method is used to test the <br /> integrity of the primary and secondary containment 6 .4.4 Preparation. <br /> of the double-walled spill bucket. <br /> 1. Remove and properly dispose of any liquid and <br /> 6 .4.2 Description of Test. A partial vacuum is debris (leaves, sediment and trash) in the spill <br /> applied to the interstitial space between the primary bucket. <br /> pei.org <br />