This standard specifies and gives guidance on: - general requirements for storage of water outside consumers' buildings, including service reservoirs for potable water and reservoirs containing water not for human consumption at intake works or within treatment works, excluding those that are part of the treatment process; - design; - general requirements for product standards; - requirements for checks, testing and commissioning; - operational requirements; - requirements for rehabilitation and repair; The requirements of this standard are applicable to: - the design and construction of new reservoirs; - the extension and modification of existing reservois