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1.3.7.7.19. Measure the distance from the tank top (inside) to the top of the standpipe. Subtractthe distance from the nail to the base of the dipstick and record this measurement. 1.3.7.7.20. Subtractthe second measurement (inside tank top to top of standpipe)from the first measurement (tank bottom to top of standpipe) to calculate the deflection. 1.3.7.7.21. Record the deflection at the appropriate place (as Measurement #1, #2, #3 or #4) on the Tank Installation Checklist. CALCULATION AND COMPARISON 1.3.7.7.22. To calculate the deflection at anytime during installation, take a diameter measurement and subtract it from Measurement #1. 1.3.7.7.23. Compare this calculated deflection to the applicable allowable deflection shown in Table 1-6. Tank Diameter Allowable Deflection 4 -foot 1/2" [1.3 cm] 6 -foot 3/4" [1.9 cm] 8 -foot 1 %" [2.9 cm] 10 -foot 11/2" [3.8 cm] 12 -foot 13/4" [4.5 cm] 1.3.7.7.24. Deflection above the allowable limit indicates the tank is not properly installed. 1.3.7.8. ONSITE PRESSURE TESTING REQUIREMENTS 1.3.7.8.1. At various stages of the installation process, there may be onsite testing requirements. 1.3.7.8.2. To pressure test tanks, you need to construct a test manifold. See Figure 4-1. • The pressure -supply gauge must have a maximum full-scale reading of 15 psig [100 kPa]. • The pressure -relief device must be rated to a maximum of 6 psig [40 kPa], or 4 psig [28 kPa] for a 12 -foot -diameter tank, to reduce the risk of overpressurizing the tank. NOTE: For multicompartment tanks, you need a test manifold for each compartment. 14 2: HANDLING AND STORING TANKS 2.I.GENERAL 2.1.1. Take care not to drop or damage the tank during loading, unload- ing, handling and storage at the jobsite. 2.1.2. Move tanks by lifting and setting only. Do not move tanks by rolling or dragging. 2.1.3. Always lift tanks by using the lifting lugs provided with the tank. Distribute the lifting load evenly between the lifting lugs. Use spreader bars and equal length slings as required. NOTE: Larger tanks may be provided with guide lugs for attachment of guide ropes during lifting and positioning operations. Do not use guide lugs for lifting. NOTICE Never roll, drag or drop the tank. This could result in damage to the tank. 2.2. UNLOADING, HOISTING AND GUIDING TANKS 2.2.1. Complete the following steps before unloading or relocating the tank on the jobsite (and before preinstallation testing at the jobsite): • Visually inspect the entire exterior surface of the tank to make sure that no shipping or handling damage has occurred. Look particularly for visible damage, cracks or deep scrapes. • Sign the shipping papers accepting the tank as delivered. Any damage observed must be noted in these papers. • Be sure that all equipment used to lift the tank is rated to handle the load. See Appendices 131, 132 and 63 in this Installation Manual forweights. • Select a smooth, solid, level area on which to place the tank, and clear that area of all large rocks, trash and debris. • Make sure all tools and other items that may damage the tank during unloading are removed from the trailer bed. 2.2.2. Make sure the tank is secured in such a way that it does not roll off the truck when unloading the tank from the truck. 0 WARNING Do not release straps securing the tank to the truck until lifting equipment (such as a crane) is secured to the tank's lifting lug(s) and until anyone in a position to be injured by the tank's movement is in a safe location. Failure to do so could result in death, serious injury or property damage. A WARNING Always secure the tank before moving, rotating or lifting it. This is commonly done by connecting a crane or backhoe to the lifting lugs. Failure to follow this warning could result in death or serious injury. A WARNING While moving or lifting the tank, do not position any part of your body underneath the tank. Failure to follow this warning could result in death or serious injury.