When Are Arbitrators’ Changes To An Award OK?

So, how does a court determine whether an arbitrator has attempted to modify an arbitration award in violation of statutory prescriptions on such action? More specifically, as a California court posits the issue in Lonky v. Patel, “[w]here… an arbitrator issues a series of rulings during an arbitration proceeding, how does a court determine which of those rulings constitutes an ‘award’?”