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r(-,y PEIIRP1200_17 _...__..-.-.-..-.----_._---.------__-_— explosion-proof may ignite flammable vapors. If a portable air compressor is used, it should be located at least 20 feet away from the venturi-eductor or outside any Class I, Division 1 area. ti 6.3.4 Preparation. 1.Remove and properly dispose of any liquid and $I debris (leaves, sediment and trash) in the spill bucket.Clean the spill bucket and examine it for damage, defects or improperly installed compo- nents. If there are loose components (e.g., loose band clamps or bolts),tighten these items before FIGURE 6-3. The vacuum test method can detect a spill performing the integrity test. If there are items bucket leak by measuring the change in vacuum level that must be repaired or replaced (e.g., deterio- during the test. rated gaskets/seals or drain valves), notify the owner/operator to obtain approval before pro- 6.3.5 Test Procedure. ceeding with the needed repairs. 1. Slowly apply a 1 a vacuum of 30 inches water 2.Examine the fill cap and adapter fitting for column to the spill bucket and close the valve. loose, missing or damaged parts and make nec- If a 30-inch water column vacuum cannot be essary repairs.Make sure that the seal on the fill attained, the spill bucket fails the test. See cap is present and in good condition. The cap Appendix B for pressure and vacuum conver- must fit securely and be leak-tight on the riser. sions. A leaking cap will result in a failed test. As an 2. Start the time-measurement device and record alternative to a tight-fill cap, use a plumber's the initial vacuum level shown on the gauge. plug in the fill riser. 3.The spill bucket drain valve,if present,must be 3.After 1 minute,record the ending vacuum level. leak-tight to pass the test. If the drain valve is Upon completion of the test, release the vacuum, not leak-tight, it may be removed and perma- remove the test apparatus and the gasketing mate- nently plugged. rial from the spill bucket and replace the original cover. NOTE: Before permanently plugging, ensure that local regulations allow the drain valve to 6.3.6 Pass/Fail Criteria. If the ending vacuum be permanently plugged. level is 26 inches water column or greater,the spill bucket passes the test. 4.Clean any contamination from the top surface of the spill bucket where the cover makes a seal If the ending vacuum level is less than 26 inches and line it with gasketing material. water column, the spill bucket fails the test. 5.Place the test cover on the spill bucket,confirm- 6.4 Double-Walled Spill Bucket Integrity Testing— ing that it makes a tight seal with the gasketing Vacuum Test Method. material. 6.4.1 Purpose. This method is used to test the 6. Connect the line from the vacuum source to the integrity of the primary and secondary containment adapter on the cover. of the double-walled spill bucket. 7.If the spill bucket is found to have cracks, loose 6.4.2 Description of Test. A partial vacuum is parts or separation of the bucket from the fill applied to the interstitial space between the primary pipe,it is not considered to be liquid-tight. This and secondary containment. The vacuum level is visually indicates a test failure. monitored for a 1-minute period. 6.4.3 Test Equipment. Test equipment shall include: peLorg