The trial court decided that, since a janitorial business had an arbitration agreement with its workers compensation insurance company, the doctrine of equitable estoppel applied with regard to whether, or not, it had to arbitrate a dispute with the third party administrator of its workers compensation claims. The Court of Appeal found the doctrine inapplicable and issued extraordinary relief. DMS Services, Inc. v. Sup. Ct. (Zurich Services Corp.) (Cal. App. Second Dist., Div. 7; May 15, 2012) 205 Cal.App.4th 1346.