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0 0 3.7.3.4.Soap all service fittings and manways.Watch for active 3.8.3.PRIMARY-TANK AIR TEST OF BASE TANK air bubbles,which indicate a leak. 3.8.3.1.Install the test manifold in the open service fitting. Connect the pressure source to the test manifold on the base 3.7.3.5.Monitor the pressure for one hour. tank.(See FIGURE 3-3 and FIGURE 3-11.) 3.7.4.AIR TEST OF SECONDARY TANK 3.8.3.2. Pressurize the primary tank to 5 psig.Allow the 3.7.4.1.Attach the quick-disconnect hose assembly from the pressure to stabilize by adding or removing air as necessary. end-tank monitor fitting to the primary-tank service fitting(with Note: The liquid level will rise during the air test. a female quick-disconnect fitting in place).This will allow air to transfer to the interstitial space. (See FIGURE 34 and FIGURE 3-13.) 3.8.3.3.Close the air-supply valve on the test manifold. 3.7.4.2.Add air as required and stabilize the air pressure in the Disconnect the air-supply line. total tank system to 5 psig. 3.8.3.4.Soap all service fittings and manways.Watch for active air bubbles,which indicate a leak. Check the reservoir for 3.7.5.EXTERNAL SOAP TEST bubbles in the monitoring fluid.(The level of the monitoring fluid 3.7.5.1.Soap the entire exterior of the tank.Watch for active air bubbles, will naturally rise due to the pressure in the primary tank.) which indicate a leak.Pay special attention to fitting(s)and manways. Lift the tank to check the bottom. Do not roll the tank. 3.8.3.5. Monitor the pressure for one hour. Do not release air pressure. 3.7.5.2.Monitor the pressure for one hour. 3.8.4.PRIMARY-TANK AIR TEST OF END TANK(S) 1 3.8.4.1. Install the test manifold in the open service fitting in the Do not stand under the tank. This could result in death, end compartments.Connect the pressure source to the test serious personal injury or property damage. manifolds. (See FIGURE 3-3 and FIGURE 3-12.) 3.8.4.2. Pressurize the primary tank of the end tank(s)to 5 psig. 3.7.5.3.When the test is completed,carefully release the air Allow the pressure to stabilize by adding or removing air as pressure from the tank by opening the air-supply valve. necessary. 3.7.5.4.When the air flow stops,remove the test manifold. Note: The liquid level will rise during the air test. 3.8. TESTING A DOUBLE-WALL MULTICOMPARTMENT 3.8.4.3.Close the air-supply valve on the test manifolds. TANK WITH LIQUID-FILLED INTERSTITIAL SPACE Disconnect the air-supply line. 3.8.4.4.Soap all service fittings and manways.Watch for active DO not connect air supply di to Me interstitial-space air bubbles,which indicate a leak.Check the reservoir for monitor fitting.Pressurizing the secondarytank(intersbbal bubbles in the monitor fluid.(The level of the monitor fluid will by itseff may damage the primary tank or cause naturally rise due to the pressure in the primary tank.) tank failure. 3.8.4.5. Monitor the pressure for one hour. 3.8.1. GENERAL 3.8.4.6.When the test is complete,carefully release the air 3.8.1.1. See FIGURE 3-10 and FIGURE 3-11. pressure from all compartments by opening the air-supply valve. 3.8.2. PRIMARY BASE TANK(INTERNAL) 3.8.4.7.When the air flow stops, remove the test manifolds. 3.8.2.1.Keep the tank vertical(the reservoir on top)at all times 3.8.4.8.Check the liquid level in the reservoir. It should be at or the liquid(brine)may drain from the reservoir. approximately the same level as the pretest level. 3.8.2.2.Remove all temporary service fitting plugs,redope,and 3.8.5. SECONDARY TANK(EXTERNAL) reinstall all fitting plugs except one for each compartment (needed for test manifolds)and the fitting on the reservoir. Install ACAUTION permanent plugs in all unused openings. Do not open the Do not conned air supply di to the interstitial-space monitor fitting (if present) or monitoring fluid could be lost. monitor ftng.Pressurong the secondary tank(interstitial space)by itself may damage the primary tank or cause 3.8.2.3.Check the liquid level in the reservoir. It should be tank failure. about 1/4 full. 3.8.5.1. Check the exterior of the tank for monitoring fluid. 3.8.2.4.Visually check the interior of each compartment for (The monitoring fluid is dyed blue to distinguish between liquid. There should not be any. moisture and monitoring fluid.) If monitoring fluid is found,wipe the tank dry and verify that the monitoring fluid does not reappear.Lift the tank to check the bottom.Do not roll the tank. 8