Wheel bearing adjustment question.

[APXD 30]

I was just looking through the Zone 2 tech form for March and would like to understand part of this excerpt pertaining to wheel bearings:

     "Tires must have sufficient tread and be in good condition.  Tires with cracks from the heat or dry-rot are not acceptable no mater how much tread is left on them.  Lug nuts must be torqued to factory specifications and the front wheel bearings must be adequately adjusted.  You are responsible for maintaining appropriate tire pressures."

What adjustments can be made to the wheel bearings?   I had one fail on a new, FWD car.    Was it/could it have been adjusted when the shop installed the Eibach sport suspension?