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PEURP1200 - 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 1 -minute period . <br /> 6 .3 . 5 Test Procedure , 6 .4. 3 Test Equipment . Test equipment shall <br /> 1. Slowly apply a 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 30-inch 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 /> sionsinch 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. <br /> the vacuum level. ) ; <br /> 3 . After l minute, record the ending vacuum level , stopwatch or other time-measurement device <br /> capable of measuring a l -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 vaeu- <br /> rial from the spill bucket and replace the original um source or a vacuum pump powered by <br /> covero an explosion•proof motor. Vacuum pumps <br /> with electric motors that are not explo- <br /> �` ' sion-proof may ignite flammable vapors . <br /> sir <br /> Tit <br /> If a portable air compressor 's used , it <br /> : , <br /> should be located at least 20 feet away <br /> from the venturl-eductor or outside any <br /> Class I , Division 1 area. <br /> n <br /> . <br /> Vacuum <br /> acuum <br /> :. <br /> Source Control Valve <br /> k <br /> o - 3o° Water Column <br /> g4 ;f + kuti iqt �} hA Vacuum gauge <br /> Sito01, <br /> n ' , <br /> lcof <br /> 41rt1 <br /> !n Regulator <br /> Qk <br /> FIGURE 6.3. The vacuum test method can detect a spill <br /> bucket leak by measuring the change in vacuum leve! L i <br /> during the test, , r I <br /> l , k if q h!I L t <br /> t� 1 tNr ,1 'S fyS r <br /> 6 .3.6 Pass/Fail Criteria . If the ending vacuum ; <br /> level is 26 inches water column or greater, the spill <br /> + + �+ , <br /> bucket passes the test. + % r <br /> If the ending vacuum level is less than 26 inches € ' �, i ti <br /> water column , the spill bucket fails the test. " '' " " ' ' ' ' <br /> 6 . 4 Double.Walled Spill Bucket Integrity Testing -- FIGURE 64. 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 /> peLorg <br />