Plaintiff signed an arbitration agreement when she was initially employed by defendant on an at-will basis. That period of employment ended. Plaintiff was rehired four months after terminating her original employment. On rehiring plaintiff, defendant did not require her to sign a new arbitration agreement or say anything about reviving the old one. Held, the trial court’s conclusion that there was no arbitration agreement governing the second period of employment was supported by substantial evidence and so its order denying defendant’s motion to compel arbitration was affirmed as all of plaintiff’s claims arose from the second, not the first, period of her employment.