nothing for take off is published-
Then public transport normally you cannot operate! Private ops you may compromise your insurance by operating outside your AFM... you sure you've not misplaced a page or two?
It is normal that you cannot extrapolate from the numbers in a set of performance tables. Therefore if the deepest contaminant for which you have published performance is 0.5 then that is your limit.
There is no requirement in current certification (cs-25) to produce figures for contaminated operations... it is simply a case that if those figures are not supplied then operation is prohibited and the AFM should say so. Not sure if that was the case when the 800XP was certified but it makes sense.