Water Quality Awareness 101 37 | P a g e 16.1.2 Solutions  Hazard identification and risk assessment practices undertaken in consultation with persons that have suitable knowledge and expertise in drinking water supply management and operation  Ensure that tanks are suitably secured to prevent unauthorised access, including the input/ingress of materials from a natural or introduced source (suitably sized vent mesh)  Check tanks regularly for maintenance and security, particularly after storm events (e.g. defective rotating vents or roof sheeting detachment)  Install/retrofit hatches that do not allow debris and contaminates to enter the tank when they are both opened and closed  Ensure suitable seals exist around tank roof areas, platforms, entry hatches, vents and other openings  Ensure that fittings/features (e.g. davits, solar panels, aerials, lighting and security equipment) are positioned so that they do not attract birds to roost and defecate around hatches and other openings  Install guttering (if required) that is easily cleaned and prevents debris ingress or rainwater drainage overflowing into the tank  Check that drainage control points on the roof and platform areas are properly connected and sealed on the underside  Use materials that can endure the humid and moist environment that they will be exposed to without degradation (chlorine is also an oxidant and will attack poorly protected metals)  Ensure renovations, such as additional pipework and cabling installations, do not compromise the sealing integrity or vermin/bird proofing of the tank  Outlet penetrations and foot valves should be located above the tank floor area, with sufficient stand-off space to prevent sediment accumulation being drawn into the downstream pipework  Use directional nozzles on inlets, or common inlet/outlet pipework, to avoid sediment disturbance and to promote more effective blending of water within the tank  Develop standard design specifications that have undergone a HAZOP review