Can an arbitrator award attorney fees based on interrelated contracts?

The arbitrator reasoned he could award attorney fees based on the interrelated nature of the parties' three contracts and the existence of an attorney fee provision in their Bonding and Accounts Payable Agreement. If the arbitrator erred in his analysis, he committed a legal and/or factual error not subject to judicial review, rather than an act exceeding his powers. (Moshonov v. Walsh (2000) 22 Cal.4th 771, 776 [where parties submitted the issue of attorney fees to the arbitrator and both prayed for fees, the arbitrator's decision was not subject to judicial review for error].)