When determining the tank size, the volumetric capacity (net liquid capacity) in the cold condition shall be taken as the volume between the maximum liquid level and either the bottom of the product outlet nozzle or the top of a weir if fitted, whichever results in the lower capacity.3.3.10The minimum freeboard height shall be equal to 300mm above the design liquid level.Design liquid level is equal to the height at the top of the overfill line plus the height required for the greater of seismic sloshing wave or upset liquid inventory, which will be defined in PES.