On the JAA approved AFM supplement for wet / contaminated RWYs (Hawker 800XP) there are no published information/limitation regarding the max depth of contaminant allowed on take off and landing.
A max scale value of 0.5 inch is published on landing graphs (except for Compacted snow) therefore I " imagine "

0.5 inch may be considered as limitation for landing - but nothing for take off is published-
My questions are :
1) Considering no limitations are published, may I take off with 2 inches of contaminant ?
2) Is there any other applicable regulation ?
thanks