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Recommended Practices for the Testing and Verification of Spill,Overfill,Leak Detection and Secondary Containment Equipment at UST Facilitie <br /> NOTE: If the fill cap. is not included in the the spill bucket.The vacuum level is monitored fo <br /> spill bucket test and/or the cap is not tight, it a 1-minute period. <br /> could be the source of potential fuel contami- 6.3.3 Test Equipment. Test equipment shat <br /> nation from water intrusion. <br /> include: <br /> (VOTE: Before permanently plugging, ensure ° vacuum test apparatus (The test apparatus ma; <br /> that local regulations allow the drain valve to be available from the spill bucket manufacture] <br /> be permanently plugged. It includes an air pressure regulator, a vacuun <br /> - source, a vacuum gauge with a minimum 0-5( <br /> inch water column range and a control valve <br /> 6.2.5 Test Procedure. The control valve is used to adjust the vacuun <br /> 1.Add water to the spill bucket to a level within level.); <br /> 1.5 inches of the top of the spill bucket. Allow o test cover(The cover is equipped with a test fit <br /> the water to settle for 5 minutes before the initial ting); <br /> water level measurement is taken. <br /> 2.Place the measuring stick vertically at the lowest ° Plumber's plug (appropriate size, if used); <br /> point in the spill bucket and extending above the ° stopwatch or other time-measurement device <br /> water level to allow for an accurate measure- capable of measuring a 1-second increment; <br /> ment to be.taken. The location of the measuring o gasketing material (The purpose of the gas <br /> stick must remain the same for each water level keting material is to provide an air-tight sea <br /> measurement. Document the initial water level between the test cover and the spill bucket.). <br /> measurement as measured from the bottom of <br /> the spill bucket.Alternative measurement meth- o•50°water column <br /> ods may be used provided that measurement to Vacuum Vacuum Gauge <br /> 1/16(0.063) inch can be made. source <br /> 3.Take all precautions to prevent the water level <br /> from being disturbed during the duration of the <br /> test. Control <br /> Valve <br /> 4. After 1 hour, document the ending water level <br /> measurement. <br /> 5. Upon completion of the test, remove and dis- <br /> pose of the water according to Section 6.7, and <br /> dry the inside of the spill bucket before returning <br /> Plumber's Plug in <br /> it to service. Tank Riser Plpe <br /> 6.2.6 Pass/Fail Criteria. If the water level has <br /> dropped less than 1/8 (0.125)inch,the spill bucket <br /> passes the integrity test. <br /> If the water level has dropped 1/8 (0.125) inch or <br /> greater, the spill bucket fails the integrity test. <br /> 6.3 Spill Bucket Integrity Testing — Vacuum Test FIGURE,6-2. The cover must make a tight sea/with the <br /> Method. spill bucket to prevent leakage when the vacuum is <br /> 6.3.1 Purpose. This method is used to test the pulled during the test. <br /> integrity of single-walled spill buckets or the pri- <br /> many containment of secondarily contained spill _ <br /> buckets. 1�Jf1�„A�ila`v"circ Use only an air-operated vac- <br /> uum source or a vacuum pump pow- <br /> 6.3.2 Description of Test. Using a specially' ered by an explosion-proof motor. Vacuum <br /> equipped test cover, a partial vacuum is applied ito� 8 ZU I�pumps with electric motors that are not <br /> ENVIRONMENTAL HEALi i-r pei.org <br /> DEPARTMENT <br />