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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 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 : vacuum test apparatus (The test apparatus may NOTE : Before permanently plugging, ensure tbe available from the spill bucket manufacturer. that local regulations allow the drain valve to be permanently plugged . It includes an air pressure regulator, a vacuum source, a vacuum gauge with a minimum 0-50 inch water column range and a control valve. 6. 2 . 5 Test Procedure. The control valve is used. to adjust the vacuum 1. 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 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- 0 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 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- maty containment of secondarily contained spill MIAG3HINflin Use only an alr-operated vac- ' buckets . uut ` source, t = cuum pump pow- area a an ex Eosin• roof motor. Vacuum 6 .3 .2 Description of Test . Using a special y . . Y p equipped test cover, a partial vacuum is applied to (pumps with electric motors that are not Sl V OV E pei.org T