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C (3 12 5.4.11. Close valve to annular space. 5.4.12. Open valves to vent all compartments (maintain 5 psig on annular space) (see Figure 5-6). Figure 5-6 Valve Open Valve Open Valve Open Fiqure 5-7 5.4.13. Monitor the pressure for 30 minutes for any loss in pressure from the initial reading which may indicate a leak. 5.4.14. While under pressure, cover tank outer surface, including fittings and manway(s), with soap solution and inspect. 5.4.15. After completing air test, release pressure. 5.4.16. Remove all gauges, valves, and hose o assemblies. N 5.4.17. Replace and tighten fitting plug(s). c 5.4.18. Replace the plastic vent plug in the open. z fittings. cr 5.5. Testing Double -Wall Tank(s) With Liquid Filled Annular Space (Hydrostatically Monitored) • Never pressurize a wet annular space. Doing so may damage the tank or cause tank failure. 5.5.1. This tank has a hydrostatic monitoring system that includes a green monitoring fluid pre-installed between the tank walls. 5.5.2. In the unlikely event of a tank leak, this monitoring fluid will leave a green trace on the tank. 5.5.3. If monitoring fluid is found on the tank inner or outer surface during any test, discontinue the installation and immediately contact Containment Solutions Field Services. 5.5.4. Comply with the requirements of Section 4. 5.5.5. With tank in upright position, remove the 4" vented plug from the reservoir fitting. 5.5.6. Add only enough monitoring fluid to cover the rib inside the reservoir. Do not overfill past the rib at this time (see Figure 5-7). Final monitoring fluid levels will be set later in the installation process. 10 5.5.7. Reinstall vented reservoir plug to ensure annular space is vented at all times. 5.5.8. Remove enough tank fitting plugs to see inside the primary tank. 5.5.9. With a light, look inside for any monitoring fluid. 5.5.10. Replace and tighten fitting plug(s). 5.5.11. Connect"Tank Test Manifold"to a primary tank fitting. 5.5.12. Connect the pressure source to the "Tank Test Manifold." 5.5.13. Pressurize primary tank to 5 psig maximum V (3 psig for 12'tanks) (see Figure 5-8). ,Z Figure 5-8 Air Supply Primary Tank Fitting Vented Reservoir Fluid 5 psig (3 psig for 12'tanks) Primary Tank 5.5.14. Close valve on "Tank Test Manifold" Disconnect the air supply line. 5.5.15. Monitor the pressure for 30 minutes for any loss in pressure from the initial reading which may indicate a leak. 5.5.16. While under pressure, cover fittings and manway(s) with soap solution and inspect. 5.5.17. After completing air test, release pressure. 5.5.18. Remove all gauges, valves, and hose assemblies. 5.5.19. Replace and tighten fitting plug(s). 5.5.20. Replace the plastic vent plugs in the open fittings. 5.6. Testing Double -Wall Compartment Tank(s) With Double -Wall Bulkheads (Hydrostatically Monitored) • Never pressurize a wet annular space. Doing so may damage the primary tank or cause tank failure.