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Recommended Practices for the Testing and Verification of Spill, Overfill, Leak Detection and Secondary Containment Equipment at UST Facilities . Clean the spill bucket and examine it for dam- 6. 5,1 General . Containment sumps are liquid- "qge. Make sure that it is free of cracks, loose tight structures designed to temporarily contain �� . or separation of the bucket from the fill leaks or spills. In addition, containment sumps P1 �. i p&�bucke rs damagedlinotify the often serve as the leak detection monitoring loca- wn%cr/operator. ' tion for double-walled piping systems . Leakage 3 . � . 3ttaC a test apparatus tt�lj the test ; o s . from the primary containment typically flows by gravity inside the secondary containment to the 4. C` nnect�l line from tb vacuum, so rce to the sump, where it can be easily observed or detected t appara sw by a sensor. 5. If e ill bket is Bund to h e cry , loose �� y This section describes a hydrostatic test method. P its or separ on 6f the buret frim the fill There are vacuum test methods available for con- pi : e, it isnot co t % erect to b hqu d , fight. This tainment sumps. Consult the manufacturer before vi: wally incates ~ fest failure. performing a vacuum test. 6.4, Test Pr dur - - N075: Follow the 'manufacturer' s instructions 1. Sl wly applyl� vacutu� of 15 inches water when testing the interstitial spaces of double- coumn toth , sl -buc�et ut erstitiul space and walled containment sumps . el se the co�ptrol valvec water col- urx vacuut canxt t a a rnn V th�pill. bucket 6. 5.2 Purpose. This section describes the prep- fa s the tit. See � per dix B�r ressure and aration and procedures to test the integrity of con- vauumnversions tainrnent sumps to ensure that they do not leak. 2 . S ue the time- lasu a Sent devic l d record t" 6. 5.3 Description of Test. The containment th init Al vacn� 1 wv el shpwn ont o gauge. sump is filled to the proper level with water. The 3. Ir 1 minu�w,ore rd the ening v- cuwr level. water level is measured at the beginning and end of the test. Upor= cornV&mwbi on o the test_ releasthe vacuum, rem( 0. tb �paiatus and res ore the pill 6. 5.4 Test Equipment. Test equipment shall buck tolts no operating condi on. include: 6 .4. Pass/Fa I Criteria . If the gilding vacuum water; levee is 12 inches water column or Oeater, the spill measuring stick that is accurate to within 1/ 16 builI t passes the test, (0 .063) inch and of sufficient length; If the ending vacuum level is less than 12 inches stopwatch or other time-measurement device water column, the spill bucket fails the test. capable of measuring a 1 -second increment. 6.5 Containment Sump Integrity Testing. 6. 5.5 Preparation. 1. Care should be taken when conducting the test CAUTION : Gaining access to the contain- in the rain or during freezing weather condi- ment sump requires removing the lid, tions. cover or dispenser panel that is in place to protect the equipment in the sump. These 2• Remove and properly dispose of any liquid and components can be heavy. They may debris (leaves, sediment and trash) in the con- require special handling and more than tainment sump, one person to remove them . Use caution 3. Inspect the containment sump for damage . when moving and replacing them when Examine all penetration fittings, conduits, junc- testingis complete. During the test, put tion boxes, caps and risers (if present), and side- the covers and panels in a safe location wall seams for defects, damage or improperly where they are secure and isolated from installed components . If there are loose corn- vehicle and customer traffic. ponents (e.g., loose penetration fitting clamps or missing interstitial space caps), correct these items before performing the integrity test. If pei.org0