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0,0000 * <br /> CONTAINMENT <br /> SOLUTIONS <br /> Revised 02/23/01 <br /> Supercedes 01/11/02 <br /> Field Test Method for Testing the Annular Space <br /> Of an Installed CSI Fiberglass Double-Wall Tank <br /> With Dry Annular Space <br /> This test method is applicable for testing the dry annular space of an installed <br /> Containment Solutions (CSI) fiberglass underground storage tank. The tank may <br /> contain any level of fuel or water and fuel or water may be added or removed at any <br /> time during the annular space test. <br /> The test procedure requires that a vacuum be pulled in the tank annular space and <br /> held for a period of time. The amount of time required to hold the vacuum and the <br /> acceptable change in the vacuum level will vary based on the tank annular space <br /> volume. The test protocol includes an initial hold time with a maximum vacuum loss <br /> of 2" Hg. If the vacuum loss exceeds 2" Hg during the initial hold time, the vacuum is <br /> continued for a longer time with a maximum vacuum loss of 4" Hg. This longer test <br /> time is sometimes required to allow for changes in temperature or variables. <br /> You will need the following equipment- <br /> 1 . <br /> quipment:1 . Vacuum gauge with a range of 0-30" Hg with increments of .5" Hg or smaller <br /> 2. A vacuum pump or an air-driven venturi vacuum pump capable of pulling at <br /> least 15" Hg vacuum with a compressor to drive the venturi vacuum pump <br /> 3. A valve and air hose <br /> Test Procedure: <br /> 1 . Connect the vacuum gauge, valve, and vacuum pump to any annular space <br /> fitting. The assembly should allow the vacuum level in the tank to be read <br /> with the valve closed. The valve should be between the vacuum pump and <br /> the tank fitting. Be sure that the assembly is airtight. <br /> 2. Start the vacuum pump and open the valve. <br /> 3. When the vacuum level reaches 13" Hg to 15" Hg, close the valve and stop <br /> the vacuum pump. <br /> 02/23/01 <br />