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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- e. Make sure that it is free of cracks, loose tight structures designed to temporarily contain or separation of the bucket the fill leaks or spills. In addition, containment sumps otify the often serve as the leak detection monitoring loca- w operator. tion for double-walled piping systems. Leakage 3. ttach a test apparatus t the test o from the primary containment typically flows by gravity inside the secondary containment to the 4. nnect line from vacuu o ce to the sump,where it can be easily observed or detected t appar by a sensor. 5.Ifill b et is and to e ,loose This section describes a hydrostatic test method. p o separ 'on f the bu et fr the fill There are vacuum test methods available for con- pi e, it i of c ered to b liqui ght.This tainment sumps. Consult the manufacturer before vi ually in 'cater st fail performing a vacuum test. 6.4. Test P dur NOTE:Follow the manufacturer's instructions 1.S wly apply vac of 5 hes water when testing the interstitial spaces of double- c umn to -buc erstiti space and walled containment sumps. cl se the c tro valy If 5-inc water col- vacu c t n th pill bucket 6.52 Purpose. This section describes the prep- s the t t. See a 'x B ssure and aration and procedures to test the integrity of con- v uum nversio taintnent sumps to ensure that they do not leak. 2.S th time- nt devic d record 6.5.3 Description of Test. The containment th ini ' vac 1 el s wn on auge. sump is filled to the proper level with water. The 3. 1 min rd the en cu level. water level is measured at the beginning and end of the test. Upo comp 'on the tes e v um, rem paratus and res re the ill 6.5.4 Test Equipment. Test equipment shall bu t is no operating condi n. include: 6.4. Pass/F 1 Criteria. If the ding vacuum water; lev is 12 inches water column or eater,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 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- merrt 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- testing Is 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 com- vehlcle 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.org 10