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t Recommended Practices for the Testing and Verification of Spill, Overfill, leak Detection and Secondary Containment Equipment at UST Facilities NOTE: If the fill cap. is not included in the the spill bucket. The vacuum level is monitored for spill bucket test and/or the cap is not tight, it ff a 1 -minute period . could be the source of potential fuel contami- .3 .3 Test Equipment . Test equipment shall nation from water intrusion, anc de: U um. test apparatus (The test apparatus may NOTE: Before permanently plugging, avlable from the spill bucket manufacturer, that local regulations allow the drain valve to 10 � 0 ,�r It in air pressure regulator, a vacuum be permanently plugged . _. . _ . . ..._... .: _ . . . .. . . . ... . . . _ , .. . . : ` rce, gauge with a minimum 0-50 ' V in water I n range and a control valve . 6 .2 .5 Test Procedure . ys; r The control valveis used to adjust the vacuum 1. Add water to the spill bucket to a level within ° 1 vel. ) ; 1 .5 inches of the top of the spill bucket. Allow ° tesover (The cover is equipped with a test fit- the water to settle for 5 minutes before the initial ting, ) ; water level measurement is taken. plumber 's plug (appropriate size, if used) , 2 . Place the measuring stick vertically at the lowest point in the spill bucket and extending above the stopwatch or other time-measurement device water level to allow for an accurate measure- capable of measuring a 1 -second increment; ment to be taken. The location of the measuring ° gasketing material (The purpose of the gas- stick must remain the same for each water level keting material is to provide an air-tight seal 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- 0 500 water Column ods may be used provided that measurement to Vacuum Vacuum Gauge 1/ 16 (0.063) inch can be made. source 3 . Take all precautions to prevent the water level from being disturbed during the duration of the control j test. Valve 4. After 1 hour, document the ending water level measurement. S. 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 in it to service. Tank Riser Pipe 6 .2.6 Pass/Fail Criteria . If the water level has j dropped less than 1 /8 (0. 125) inch, the spill bucket passes the integrity test. i If the water level has dropped 1/8 (0 . 125) inch or greater, the spill bucket fails the integrity test. 6 . Spill Bucket Integrity Testing --- Vacuum Test FIGURE ,6.2. The cover must make a tight seal with the M thod . spill bucket to prevent leakage when the vacuum is 6 .3.1 Purpose . This method is used to test the pulled during the test. integrity of single-walled spill buckets or the pri- mary containment of secondarily contained spill W/1i�3VA15L(! : Use only an air-operated vac- buckets , uum source or a vacuum pump pow- ; 6.3 .2 Description of Test . Using a specially eyed by an explosion-proof motor. Vacuum equipped test cover, a partial vacuum is applied to pumps with electric motors that are not pei .org