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Recgmmended Practices for the Testing and Verification of Spill, Overfill, Leak Detection and Secondary Containment Equipment at UST Faciliti ... • NQTE : If the fill cais not included luded in the u d the spill bucket. The vacuum level is monitored f � p. spill bucket test and/or the cap is not tight, it a 1 -minute period , could be the source of potential fuel contarni- 6 ,3 ,3 Test Equipment , Test equipment sht nation from water intrusion. Y include: NOTEo Before permanently plugging, ensure vacuum test apparatus (The test apparatus m• that local regulations allow the drain valve to be available from the spill bucket manufactu>y be permanently plugged. It includes an air pressure regulator, a vacuu _ , . . . . _ . ., . . . . source, a vacuum gauge with a minimum 0-: inch water column range and a control vale 6 .2 . 5 ' Test Procedure , The control valve is used, to adjust the vacuu L Add water to the spill bucket to a level within level:) ; 1 . 5 inches of the top of the spill bucket. Allow ° test cover (The cover is equipped with a test f the water to settle for 5 minutes before the initial ting. ) ; water level measurement is taken. o plumber 's plug (appropriate 'size, if used) ; 2 . Place the measuring stick vertically at the lowest point in the spilt bucket and extending above the ° stopwatch or other time-measurement devi water level to allow for an accurate measure- capable of measuring a 1 -second increment; ment to be taken. The location of the measuring ° Basketing material (The purpose of the gt stick must remain the same for each water level keting material is to provide an air-tight se measurement. Document the initial water level between the test cover and the spill bucket. ) . measurement as measured from the bottom of the spill bucket. Alternative measurement meth- o • 500 water column ods may be used provided that measurement to Vacuum Vacuum Gauge 1 /16 (0.06:3) inch can be made. source 3 . Take all precautions to prevent the water level from being disturbed during the duration of the control test. Valve 4. After 1 hour, document the ending water level measurement. 5. Upon completion of the test, remove and dis- pose of the water according to Section 6.7 , and dry the inside of the spill bucket before returning Plumber's Plug it to service. Tank Riser Pips 6 ,2. 6 PasVFall Criterla , If the water level has dropped less than 1/8 (0 . 125) inch, the spill bucket passes the integrity test, If the water level has dropped 1/8 (0. 125) inch or greater, the spill bucket fails the integrity test. 64 Spill Sucket Integrity Testing a— Vacuum Test ;FICUFIE 6.2. The cover must make a tight seal with th M ;t spill spill bucket to prevent leakage when the vacuum is 6 ,3 , Purposov This method is used to test the pulled during the test. x. integrity of single-walled spill buckets or the pri- _ _ kw" .�. ._ . . � .. . . maty containment of secondarily contained spill buckets. 13,/u;Zy4ill15Ca Use only an air-operated vac- uum source or a vacuum pump pow- i 6 . 3 ,2 Description of Test. Using a specially eyed by an explosion-proof motor, Vacuum i equipped test cover, a partial vacuum is applied to pumps with electric motors that are not pel , org Q