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Recgmmended Practices for the Testing and Verification of Spill,Overfill,Leak Detection and Secondary Containment Equipment at UST Faciliti NOTE: If the fill cap.is not included in the the spill bucket.The vacuum level is monitored f spill bucket test and/or the cap is not tight, it a 1-minute period. could be the source of potential fuel contami- 6.3.3 Test Equipment. Test equipment shy nation from water intrusion. include: vacuum test apparatus (The test apparatus in. NOTE: Before permanently plugging, ensure be available from the spill bucket manufacture that local regulations allow the drain valve to It includes an air pressure regulator, a vacuu be permanently plugged. source, a vacuum gauge with a minimum 0-.- inch -:inch water column range and a control valN 6.2,5' Test Procedure. The control valve is used to adjust the vacuu 1, Add water to the spill bucket to a level within level:); 1.5 inches of the top of the spill bucket. Allow o 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. 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 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 o gasketing material (The purpose of the g< stick must remain the same for each water level keting material is to provide an air-tight s( 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-50°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 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 Pip, 6.2.6 Pass/Fall Criteria. 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. 6. Spill Bucket Integrity Testing — Vacuum Test :FIGUFIE,6.2. The cover must make a tight sea/with tr M thod. spill bucket to prevent leakage when the vacuum is 6.3.1 Purpose. This method is used to test the pulled dui/ng the test, integrity of single-walled spill buckets or the pri- _ many containment of secondarily contained spill 119f1i„21��1i1��S(i� Use only an air-operated vee- buckets, uum source or a vacuum pump pow- 6.3,2 Description of Test. Using a specially ered by an explosion-proof motor. Vacuum equipped test cover, a partial vacuum is applied to pumps with electric motors that are not pei,org