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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 a 1-minute period. could be the source of potential fuel contami- 6.3.3 Test Equipment. Test equipment shall nation from water intrusion. include: NOTE: Before permanently plunge's re vacuum test apparatus (The test apparatus may that local regulations allow the drain valve to � be available from the spill bucket manufacturer. be permanently plugged. It includes an air pressure regulator, a vacuum a P R 1 3 2020 source, a vacuum gauge with a minimum 0-50 inch water column range and a control valve. 6.2.5 Test Procedure. 7AL HEA The control valve is used to adjust the vacuum 1. Add water to the spill bucket to a level within MERT level.); 1.5 inches of the top of the spill bucket. Allow ° test cover(The cover is equipped with a test fit- the water to settle for 5 minutes before the initial ting.); water level measurement is taken. 2.Place the measuring stick vertically at the lowest plumber's plug (appropriate size, if used); 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- o-so°water column ods may be used provided that measurement to Vacuum Vacuum Gauge 1/16(0.063) inch can be made. source i. 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 In it to service. Tank Riser Pipe 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. 6.3 Spill Bucket Integrity Testing — Vacuum Test FIGURE,6-2. The cover must make a tight seal with the Method, 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 Use only an air-operated vac- 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