Levelling of SLAB (Variance) - Acceptable Standard?

Hello All,

Did anyone have any issues with the level of their SLAB? we will be putting floating timber laminate throughout the house. The flooring people have told me that my slab should only have a variance of 2 to 3mm. Would this be something I need to have noted on my contract somewhere?

Excavation just recently started and the slab will follow possibly next week. Do you reckon I'd best speak to my site supervisor about my concern about the level of the slab?

thanks paul