A thorough check informs Quint that there is only a single secret door on this entire floor, one that links one of the guardrooms to the entrance hall. It isn't especially useful beyond as a quick way for guards to move and engage any opposition they haven't shot to death.
As you gather for your assault, the oozes detect your presence and begin sliding through the acolyte halls towards you. There are two of them, and they are an off sort of green in colour. Fortunately, since you were prepared, you get the drop on them - the team has first turn.