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preinstallation testing procedures.The date that the vacuum 4.4.8.Carefully release the air pressure from the tank.See was applied Is on a label by the monitor or on the shipping SECTION 3.9. documentation delivered with the tank. 4.4.9.Remove the test manifold and replace the protective 4.3.1.1.This date may be used as a reference under this pro- covers in the service fittings. cedure to evaluate the tank's integrity prior to installation,and 4.5.AIR TESTING A DRY MONffOR, DOUBLE-WALL to validate Xerxes'obligations under the limited warranty. MULTICOMPARTMENT TANK NOT UNDER VACUUM 4.3.1.2.Xeres tanks shipped under vacuum must be under vacuum for a minimum of 7 days.If this requirement is not met, CAUTION an air/soap test is required.See SECTION 4 for instructions. Do not connect air supply directly to the interstitial-space 4.3.1.3.The tank shipped under vacuum should be Installed monitoring access fitting.Pressurizing the interstitial space by itself may result in damage to the primary tank and/or and backfilled with the vacuum intact if both of the following tank failure. two conditions are met: 4.5.1. Prepare the tank for air testing.See SECTION 3.4. 4.3.1.3.1.installation of the tank is to begin 7 days or more after the factory application of vacuum(as indicated on the 45.1.1.Install a test manifold in each compartment,that Is,in shipping documents and/or tank labels) the base tank and each and compartment.See FIGURE 4-1. 4.3.1.3.2.the vacuum gauge shipped with the tank reads 12 inches of mercury or more. opfimrst maervoir rtamay IL^9 Typical Monitoring access NOTE:The vacuum-monitoring method is less sensitive and (wet kmenatiod space) with finings semce filkn9 fitting � ) l less reliable than the soap test described in SECTION 3.7. Pressure- / �� Under certain field conditions(such as major changes in relief veva 4;;, for shipgng temperature,barometric pressure and/or altitude)and/or E„o with certain equipment failure(such as freezing or sticking corpamnerd of gauge mechanism),the vacuum-monitoring method may not be an accurate enough test.When in doubt,or when ! \ -Flat such conditions occur,Xeres recommends SECTION 4.4.or ! Seam for base tank `. `tib 4.5.(whichever is applicable)as the preferred preinstallation Seam for end compartment Seam for and compartment test procedure. 4.3.1.4.After the tank is backfilled to the top of the tank,the FIGURE 4-1 tank must be air tested.See SECTION 13 for instructions. 4.5.2.Pressurize the primary tank.See SECTION 3.5 and FIGURE 4-2. 4.3.1.5.If either or both of the conditions stated in POINTS 4.3.1.3.1.and 4.3.1.3.2. are not met,follow the procedures of SECTION 4.4.or 4.5. (whichever is applicable)for the prein- Air Test of Base Tank stallation test. e e ef. elle 4.3.1.5.1.If the gauge reads less than 12 inches of mercury, perform a visual inspection of the exterior of the tank and the vacuum gauge fittings to evaluate the tank's integrity,and contact the plant from which the tank was shipped. FIGURE 4-2 NOTE:Do not attempt unauthorized repairs. 4.5.3. Pressurize the end compartment(s).See SECTION 3.5. 4.3.1.6.Record the vacuum gauge reading at the time of in- and FIGURE 4-3. stallation on the Tank Installation Checklist. 4.4.ARTMMADl?R" MR,DOIK.EWALLTAW Air Test of EndCompartment(s) 4.4.1.Prepare the tank for air testing.See SECTION 3.4. ie e e 4.4.2.Pressurize the primary tank.See SECTION 3.5. 4.4.3.Soap all service finings and manways.See SECTION 3.7. 4.4.4.Hold and monitor the pressure in the primary tank for a minimum of 1 hour. FIGURE 4-3 4.4.5.Use the quick disconnect assembly to pressurize the in- 4.5.4.Soap all service fittings,manways and covers.See terstitial space.See SECTION 3.6. SECTION 3.7. 4.4.6.Soap the entire exterior of the tank.See SECTION 3.7. 4.5.5.Hold and monitor the pressure for a minimum of 1 hour. 4.4.7.Hold and monitor the pressure in the interstitial space 4.5.6.Use the quick-disconnect assembly to pressurize the in- for a minimum of 1 hour. terstitlal space.See SECTION 3.6.and FIGURE 4-4. 7