The NCAC has a really good fact sheet on biting It should at the least, Neenee, give you some really good ideas to take into the Centre, to find out exactly what they are doing. Don't be concerned about getting upset - it's a horrible thing to have happen.
As far as bringing in support agencies goes, it has to be a really severe issue before anyone will do that. We looked into it when we had 50+ bites in a month in a Centre where I worked.
As for strategies to stop the biting, time out definitely isn't best practice. Why put a child into an understimulating environment, where they are just likely to get bored? (and frustrated, giving them more cause to bite?) It's far more important to draw their attention to the consequences of their actions - get the offending child to go and get the cold pack, and sit with the victim while they are being comforted and treated, drawing attention to the pain and discomfort that the biting causes. This way they are still being removed from play, but more likely to understand why.
If you're not happy with the Centre for other reasons, Neenee, then go for it and pull her out. Make sure you tell them that that's why too. Good luck!