remove the egr, put a blanking kit on, clean as much oil as you can out first, if intercooler is very oily you will have to take it out and clean it too
turbos allways pass some oil though it shouldnt be noticeable on the dip stick ,hoses and intercooler collect some it ,if its more than just damp ,remove turbo outlet to intercooler hose and run engine to see if there are visible amounts of oil coming out