Laserfiche WebLink
1 <br /> Recommended practices for the Testing and Verification of Spill, Overfill, Leak Detection and Secondary Containment Equipment at UST Facilities <br /> mary containment of secondarily contained spill <br /> buckets. WARNING : Use only an air-operated vacu- <br /> um source or a vacuum pump powered by <br /> 6.3 .2 Description of Test. Using a specially an explosion-proof motor, Vacuum pumps <br /> equipped test cover, a partial vacuum is applied to with electric motors that are not explo- <br /> the spill bucket. The vacuum level is monitored for sion-proof may Ignite flammable vapors . <br /> a I - minute period. If a portable alr compressor Is used , it <br /> should be located at least 20 feet away <br /> 6.3 .3 Test Equipment. 'Test equipment shall from the venturt-eductor or outside any <br /> include : Glass 1 , Division 1 area . <br /> • Vacuum test apparatus (The test apparatus may <br /> lie available from the spill bucket manufacturer. 6 . 3 .4 Preparation . <br /> It Includes an air pressure regulator, a vacuum <br /> source , a vacuum gauge with a minimum O-50 1. Remove and properly .dispose of any liquid and <br /> inch water column range and a control valve. The debris (leaves, sediment and trash ) in the spill <br /> control valve is used to adjust the vacuum level . ) ; bucket. Clean the spill bucket and examine it for <br /> Test cover (The cover is equipped with a test damage, defects or improperly installed compo- <br /> fitting ) ; vents: If them are loose components te:g. , loose <br /> band clamps or bolts) , tighten these items before <br /> • Plumber's plug (appropriate size, if used ) ; performing the integrity test. if there are items <br /> • Stopwatch or other tithe-measurement device that must be repaired or replaced ( e .g. , deterio- <br /> capable of measuring a I -second increment . rated gaskets/seals or drain valves ) , notify the <br /> owner/operator to obtain approval before pro- <br /> • Gasketing materi&il (The purpose of the gas- ceeding with the needed repairs, <br /> keting material is to provide an air-tight seal <br /> between the test cover and the spill bucket. ). 2 • Examine the rill cap and adopter fitting for <br /> loose, missing or damaged pans and make nec- <br /> essary repairs. Make sure that the seal on the fill <br /> 0 - 50' water column cap is present and in good condition . The cap <br /> Vacuum Vacuum Gauge must fit securely and be leak-tight on the riser. <br /> Source �.. i A leaking cap will result in a failed test . As an <br /> alternative to a tight fill cap, use a plumber ' s <br /> plug in the fill riser. <br /> Control 3 . The spill bucket drain valve , It' present, must be <br /> Valve p p <br /> leak- tight to pass the test. if the drain valve is <br /> not leak-tight , it may be removed and perma- <br /> nently plugged, <br /> NOTE: Before permanently plugging, ensure <br /> that local regulations allow the drain valve to <br /> � <br /> Tank Riser Pipe be permanently plugged . <br /> 4. Clean any conticunination from the top surface <br /> of the spill bucket where the cover makes a seal <br /> Plumtser's Plug : [ <br /> and line it with gaske"g material . <br /> 5. Place the test cover on the spill bucket, cori - <br /> firming that it makes a tight seal with the gas_ <br /> keting material . <br /> F=IGURE t -2. The cover must make a tight seat with the 6. Connect the line from the vacuum source to the <br /> spill bucket to prevent leakage when the vacuum is adapter on the cover. <br /> � pulled during the test. <br /> 7 . If the spill bucket is found to have cracks, louse <br /> parts or separation of the bucket from the rill <br /> pel.org <br /> I <br />