• The tank site must be flat and level, the area well compacted and free from any rocks, stones and sharp objects
• Ensure that the prepared site is at least 600mm larger in diameter than the tank
• A 75mm (3”) base of compacted crusher dust may be used as a tank pad. A reinforced concrete slab is also acceptable and must be greater than the diameter of the tank
• If a material other than concrete is used, a retaining wall or surround must be provided to prevent erosion
• The overflow must be piped well clear of the tank to avoid undermining of the tank base.
• Ensure that a flexible hose of at least 300mm (12”) is installed after the outlet valve to absorb any shocks or movement
• Modular tanks must be installed on a reinforced concrete slab

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