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Recommended Practices for the Testing and Verification of Spill, Overfill, Leak Detection .and Secondary Containment Equipment at UST Facilities A. Clean the spill bucket and examine it for dam- 6. 5,1 General . Containment sumps are liquid. ge. Make sure that it is free of cracks, loose tight structures designed to temporarily contain parts or separation of the bucket from the fill leaks or spills. In addition, containment sumps pig "lf the =spill=buchkei sa dainugednotify the often serve as the leak detection monitoring loca- bwn Ioperator. � tion for double-walled piping systems . Leakage 3, attach " e test apparatus td the test oft. from the primary containment typically flows by gravity inside the secondary containment to the 4. Connect e line from t vacuum ,so ce to the sump, where it can be easily observed or detected A& appar ds . by a sensor. �� 5. If ill bucket is f and to he cr�i3;s, loose � � �� This section describes a hydrostatic test method . p tts o 1%epara on f the bucket a the fill There are vacuum test methods available for con- pi e, it i"trot co st ered to b `Yli -tight. This tainment sumps. Consult the manufacturer before vi, wally incate� st I failure. perforiming a vacuum test. 4 6 Test Pdur - F NOTE: Follow the manufacturer's instructions c Qe� tions 10 Sly wly apply , vacuuof�15 mihes water when testing the interstitial spaces of double- umn to tl s -buc�etl titin space and walled containment sumps . cl se the control v If a i5-ine water col- urillmn vacuu i cte t atnrl, the spill bucket 6. 5.2 Purpose. This section describes the prep- fas the tst. See ppe drx B clr pressure and aration and procedures to test the integrity of con- va- uum conversion < tainment sumps to ensure that they do not leak. 2 . SuArt the� tame as,,reu'aent devlc and record i6. 5.3 Description of Test. The containment th ' initial vacu�tun libel s`lv�,,i,wn on t, a gauge. sump is filled to the proper level with water. The 3 er 1 m1n> b, record the endi v cuul level. water level is measured at the beginning and end of Kr the test. s Uponicomp on if' the test, re'Jeaspum, remote tie „ test pparatus and res re the 40 6. 5.4 Test Equipment. Test equipment shall bu6kq tits norr operating condition. ' include: 6.4.6 Pass/Fa i Criteria. If the ending vacuum water; levo, 12 inches water column or eaten, the spill ° measuring stick that is accurate to within 1116 buket passes the test. (0 . 063) inch and of sufficient length; Ifvthe ending vacuum level is less than 12 inches stopwatch or other time-measurement device water column, the spill bucket fails the testa capable of measuring a l -second increment. 6. 5 Containment Sump integrity Testing. 6. 5.5 Preparation. 1.. Care should be taken when conducting the test C UT1 o Gaining mess 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 components can be heavy. They may debris (leaves , sediment and trash) in the con- require special handling and more than taiinrnent sump. one person to remove them , Use caution 3. Inspect the containment sump for damage . when moving and replacing them when famine 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- vehiele 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