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i 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 (VOTE; Before permanently plugging, ensure be available from the spill bucket manufacturer. that local regulations allow the drain valve to It includes an air pressure regulator, a vacuum be permanently plugged. 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 o 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. 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 o 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 • 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 i 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/Fail 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 FIGURE 16.2 . The cover must make a tight seal with the Mt hod . spill bucket to prevent leakage when the vacuum is 6 . 3 . E Purpose. This method is used to test the pulled during the test, integrity of single-walled spill buckets or the prim maty containment of secondarily contained spill1l/�ii�,1ti6�Sna � Use only an air=operatedae - buckets . uum `` sduide or a vacuum pump pow- 6 . 3 .2 Description of Test. Using a specially Bred by an expiioion-proof motor. Vacuum equipped test cover, a partial vacuum is applied to pumps with electrc moFIN tors that are not iIN , x pet .org r