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! i P Recommended Practices for the Testing and Verification of Spill, Overfill, Leak Detection and Secondary Containment Equipment at UST Facilities maty containment of secondarily contained spills �i buckets . ARNINGAs Use only an airr pperated va�au- um source or a vacuum p tiny pdwere `6y 6.3. 2 Description of Test. Using a specially an explosion-proof motor. Vacuum pumps equipped test cover, a partial vacuum is applied to with electric motors that are not explo- the spill bucket. The vacuum level is monitored for sion-proof may ignite flammable vapors. a 1 -minute period. If a portable air compressor is used , it should be located at least 20 feet away 6.3. 3 Test Equipment . Test equipment shall from the venturi-eductor or outside any include: Class 1 , Division 1 area. • Vacuum test apparatus (The test apparatus may be available from the spill bucket manufacturer. 6 .3.4 preparation . It includes an air pressure regulator, a vacuum source, a vacuum gauge with a minimum 0-50 1. Remove and properly dispose of any liquid and V nch water column range and a control valve. The debris (leaves , sediment and trash) in the spill control valve is used to adjust the vacuum level.) ; bucket. Clean the spill bucket and examine it for • Test cover (The cover is equipped with a test damage, defects or improperly installed compo- nents. If there are loose components (e. g.*, loose fittin(by .) ; band clamps or bolts) , tighten these items before • Plumber 's plug (appropriate size, if used) ; performing the integrity test. If there are items • Stopwatch or other time-measurement device that must be repaired or replaced (e. g . , deterio- capable of measuring a 1-second increment; rated gaskets/seals or drain valves), notify the owner/operator to obtain approval before pro- • Gasketing material (The purpose of the gas- ceeding with the needed repairs. keting material is to provide an air-tight seal between the test cover and the spill bucket.) . 2. Examine the fill cap and adapter fitting for loose, missing or damaged parts and make nce- essary repairs . Make sure that the seal on the fill o - so° water column cap is present and in good condition. The cap Vacuum vacuum Gauge must fit securely and be leak-tight on the riser, Source :7': A leaking cap will result in a failed test. As an alternative to a tight fill cap, use a plumber 's plug in the fill riser. Control 3 . The s ill bucket drain valve if resent, must be Valve p p leak-tight to pass the test. If the drain valve is not leak"tight, it may be removed and perma- nently plugged. e ' e permanently lu m ensure NOTE: B for P Y P gg g� that local regulations allow the drain valve to Piumbes Ftug`in' beermanentl lu ed. ? T4nk.Rlser P1Pe. . P Y P gg 4. Clean an contamination from the to surface Y P of the spill bucket where the cover makes a seal and line it withasketin material. g g S. Place the test cover on the spill bucket con - firming that it makes a tight seal with the gas- keting material . FIGURE 6-2. The cover must make a tight seal with the 6 . Connect the line from the vacuum source to the splll bucket to prevent leakage when the vacuum Is adapter on the cover. pulled during the test. 7. If the spill bucket is found to have cracks, loose parts or separation of the bucket from the fill pei . org i�