COMPLIANCE INFO_2000-2003 - Laserfiche WebLink

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Buoyant forces are parte . resisted by the weight of the tank, the backfill and the pavement atop the tank. Additional buoyant restraint when required, shall be obtained by using properly designed hold-down straps in conjunction with concrete hold-down pads or deadman anchors. The use of steel cable or round bar as hold- down straps on the tank is prohibited. NOW dam elr*v endued be Swanod ftm ft .n Mort ko dtatenWe afafergl. ' 6.3 Whe allasting the tank, ballast level inside the tank must never exceed the water level, or backfill level, in the excavation during installation. 7.1 5.2 Installers of hold-down straps shall ensure that the straps are separated from the tank by a pad made of inert insulating d"reiectric material, The separating pad shall be wider than the hold- down straps, which will prevent direct contact between the straps and the tank shell. 7.2 5.3 Ballasting the tank may be necessary. When water is used as the ballast material, it shall only be potable water and shall not remain In the tank longer that 60 days. ' 6.0 BACKFILLING 619 Homogeneous backfill material similar to the bedding material shall be Carefully placed around the entire tank to create a uniform homogeneous environment. Avoid damage to laminate especially where tamping is required. 6.2 Installing and tamping backfill along the bottom sides of the tank shall ensure that the tank Is fully and evenly supported around the bottom quadrant. FINAL AIR TEST Install required tank piping using compatible non - hardening sealant, taking care not to cross thread or damage the nylon bushings. Torque of 400 to 1,044 ft -lbs (542.3 to 1355.82 N -m.) shall be required to fully insert pipe. Where air or hydrostatic testing is required after installation, the pressure applied shall not be in excess of 5 psi (34.5 kPa) as measured at the top of the tank. A soap solution shall be applied around pipe connections while sir test is being performed. 8.0 ELECTRICAL ISOLATION 8.1 All openings shall be Isolated where electrical accessories will be installed such as submersible pump, monitoring equipment and all other, grounded electrical devices. 8.2 Prior to backfilling to top of tank, all opentr O shall be visually inspected to assure that the di- electric isolation (nylon bushings orftange•. gaskets), where Pumished, remains in place. Where flanged openings have been used, -'- Isolation of the flange gaskets shall be confirmed with a continuity tester. Cnntnnt with tha tflnle