Removing a given email synced to my iPad?
If you just want to be done with all trace of the mail, simply fire up your iPad and go to the settings app.

From there, tap on Mail, Contacts, Calendars and select the mail account in question.

The Delete Account control will remove that account and all messages, contacts, calendars and notes that were synced to your work gmail account.

This does nothing to the actual google account and deletes no messages or contacts from the server. That would need a working connection and/or you to log in to the account at http://gmail.com or the URL they set up for your business log in.