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6.4. Before placing tank sump on tank fitting adapters,place U. Monitoring solutions available with biodegradable approved pea gravel or crushed stone backfill between green tint. the tank top and tank sump bottom.Ensure there will be 821 Brine-calcium chloride in water. no backfill voids under the tank sump(see Figure 6-2). Fgure 62 822. Propylene Glycol Solution in water. proper Baisfill Inaullztion Improper BackNl lnsrolladpn 8.3. Filling Tank Sump Annular Space: 8.3.1. Monitoring Fluid Fill Kit tMFFK Kit)is required when AB Backfill filling the annular space ofdouble-wall tank sumps with monitoring fluid.Failure to use the MFFK Klt may result in entrapped air and false alarms. 8.32. MFFK Kit Contents Air Void Items city. Tank orreTank Wrong 115'PVCthreaded fillfitdngwlth2thort hosesarM Fitting Fitting Barbedlsoseconnenors, t 6.5. Position tank sump on tank fltUrg adapters. Siphon gun I 6.6. Complete manufacturers Installation oftank flulg 6'kssg WODby W ID plastic tubing. 1 adapter 6.7. Do not stand in tank sump or install the tank sump s•lorg WOO MN•lD plastic tubing. I lid until after the tank sump is properly backfilled and 833. Remove the permanent Ilh"reservoir plug from tank supported. sump reservoir and set aside for later use. 6.8. Continue installation following these published &3.4. Install and hand tighten the t'h'PVC flll fltdng into Instructions. the tank sump reservoir coupling.No thread dope or 6.9. Transition tank sumps are installed in exactly the same Teflon tape is required(see Figure 8-1). manner as a flat bottom tank sump without Installing a tank fitting adapter. Fgure8,1 a , 7.1. The annular space may be pressure tested to a maximum of 3 Psig during the installation. uph— Waltanng Rule TubingBrb Tubing Barb 7.2. Prior to pressurizing the tank sump,install a 15 psi air gauge with Y.or 4416.Increments. 73. After pressurizing,apply a soap and water solution to the To siphon gunjr(mnn�Wvibel aobng fluor entire surface area on the inside and outside ofthe tank Imnn.cr4•mxl sump. 7.4. Carefully inspect for leaks as Indicated by continuous "CHIRmro formation of bubbles. 7.5. Maintain test pressure and continue inspection for 30 minutes.Then release pressure. 635. Connect the 8'plastic tubing to the monitoring fluid tubing barb and place the opposite end of the tubing VACUUM MONITORED ANNULAR SPACE In a bucket of monitoring fluid.Temporarily attach the tubing to the bucket to keep the end positioned at the 8.1. Vacuum monitoring maybe used on the CSI double-wall bottom of the bucket. tank sump utilizing the factory installed fitting. 83.6. Connect the 4'plastic tubing to the siphon tubing 8.1.1. Maximum continuous vacuum level shall not exceed barb and connect the opposite end to the siphon 5 psig(10.2'Hg). connection on the siphon gun. 8.1.2. Monitoring the annular space with continuous positive 83.7. Connect the siphon gun to an air compressor.Regulate air pressure is not permitted. the supplied air pressure to not exceed 100 psi.Typical air consumption Is 13.7 scfm at 100 psi. HYDROSTATIC MONITORING air Fill the tank sump In the following order. 8.4.1. Prepare the required gallons of monitoring fluid for each tank sump. Hydrostatic monitoring space between the Inner and outer tank sump must be vented to the atmosphere.If unvented,pressure buildup can cause tank sump damage. 7