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Recommended Practices for the Testing and Verification of Spill,Overfill,Leak Detection and Secondary Containment Equipment at UST Facilities NClean 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 parts or separation of the bucket f-+ the fill leaks or spills. In addition, containment sumps pip If the-spill, bucket is damaged notify the often serve as the leak detection monitoring loca- ownctperator. tion for double-walled piping systems. Leakage 3.Attach il►e test apparatus t the test o from the primary containment typically flows by gravity inside the secondary containment to the 4. Connect the line from vacu o ce to the sump,where it can be easily observed or detected apparaw,,s. by a sensor. 5.If s ill bucket is and to e ,loose This section describes a hydrostatic test method. p o separaJoni f the bu et fr the fill There are vacuum test methods available for con- pi e, it i of coL�i erect to b liqui ght.This tairtment sumps. Consult the manufacturer before vi ually in 'cates i tst fail performing a vacuum test. 6.4.1 Test P dura NOM Follow the manufacturer's instructions 1.Sl My apply a vacu of 5 ' hes water whca testing the interstitial spaces of double- : umn to &)ll-bucket ' rstiti 1 space and walled containment sumps. C 1 se the c tro valy If a 15-inc water col- vacu c t a 'ntth spill bucket 6,5.2 Purpose. This section describes the prep- f s the t t. Seee x B rn ssure and aration and procedures to test the integrity of con- ,v num nversion tainment sumps to ensure that they do not leak. 2. S th time- as 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. r 1 min rd the en g vacuum level. water level is measured at the beginning and end of Lipo comp 'on the tes lease the vacaum, the test. i remo paratus and restore the spill 6.5.4 Test Equipment. Test equipment shall bu t is no operating condi n. 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 1116 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- 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 &bns (leaves, sediment and trash) in the con- require special handling and more than taiinment sump. one person to remove them. Use caution 3.h 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- 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.org 0