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Recommended Practices for the To and Verification of Spill,Overfill,Leak Detection-andadary Containment Equipment at UST Facilities Clean the spill bucket and examine it for dam- 8.5.1 General. Containment sumps are liquid- e. Make sure that it is free of era ks, loose tight structures designed to temporarily contain or separation of the bucket the fill leak& or spills. In addition, containment sumps p otify the often, serve as the leak detection monitoring loca- w operator. on for double-walled piping systems. Leakage ® e test apparatus t e test from the primary containment typically flows by gravity inside the secondary containment to the ® nnect line from v o ce to the sump, he it can be easily observed or detected by a sensor. 5. ill b t is and to e loose `17ais section describes a hydrostatic test method. s on fthe t the MI There are vacuum test methods available for con- pi ,it i of to liqui ight.This taininent sumps. Consult the manufacturer before vi ually cates t fail perfmming a vacuum test. 6.4. Test du N0'TlE.Follow the afar is instructions J_S Wly ly vacu of 5 water when testing the interstitial spaces of double- c to space and walled containment sumps. cl e the v vIf 5-in water col- vacu C a . th ill bucket 6.5.2 Purpose. This section describes the prep- s the t t. See x B sure and aration and procedures to test the integrity of con- v u nversio taiment sumps to ensure that they do not leak. 2.S th time- ent devi d record vac 1 els on auge- 6.5.3 Description of Test. The containment surrp is filled to the proper level with water. The 3. r 1 rd the en u level. water level is measured at the beginning and end of the tem upo comp n the to v urn, re and rmes the ill 6.SA Test Equipment. Test equipment shall bu t is In operating condi zt inclade: 6.4. Pass/F I Criteria. If the ding vacuum * waten lev is 12 inches water column or r,the spill - measuring stick that is accurate to within 1/16 b et passes the test, (0.063)inch and of sufficient length; I the ending vacuum level is less than 12 inches - stopwatch orother time-measurement device water column,the spill bucket fails the test. capable of measuring a 1-s and increment, 6.5 Containment Sump Integrity Testing. &5.6 Preparation. L 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 2.Remove and properly dispose of any liquid and protect the equipment in the sump. These coThey &brie (leaves, sedit and trash) in the con- mponents can be heavy. may mentainment sump. require special handling and more than 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- testin g Is complete. During the test, put tion boxes,caps and risers(if present),and side- the covers and panels in a safe location vall seams for defects, damage or improperly where they are secure and Isolated from installed components. If there are loose com- 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 pel.org