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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 fr 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 the test from the primary containment typically flows by gravity inside the secondary containment to the 4. nnect line from vac o ce to the sump,where it can be easily observed or detected appara by a sensor. 5.If ill b et is and to e ,loose This section describes a hydrostatic test method. p o sep on f the bu t fir the fill There are vacuum test methods available for con- pi ,it i of ezed to liqui tight This tainment sumps. Consult the manufacturer before vi ually in 'cater t fail performing a vacuum test. 6.4. Test u NOTE:Follow the manufacturer's instructions 1.S wly apply vacu of 5 hes water when testing the interstitial spaces of double- c umn t- i11-buc titi space and walled containment sumps. cl se the tro valy . If 5-in water col- vacu t a th pill bucket 6,5.2 Purpose. This section describes the prep- the t t. See B sure and aration and procedures to test the integrity of con- v um nversio W=ent sumps to ensure that they do not leak. 2.S th time- ent devi 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. r 1 min rd the en u level. water level is measured at the beginning and end of the test. Upo comp on the to 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. inclade: 6.4. Pass/Fa 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; Ithe 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. 6.5.6 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 peaves, sediment and trash) in the con- tainment sump. require special handling and more than one person to remove them. Use caution 3.In spect 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 0