Johnson v. Liberty Northwest Ins. Corp. [07/01/09] 2009 MTWCC 20 Where Petitioner’s non-work-related exposure to asbestos was essentially limited to being a Libby resident, and Petitioner was exposed to copious amounts of asbestos during his employment at the lumbermill in Libby – including the eight years that Stimson owned the mill – the Court found that his work-related exposure to asbestos exceeded his non-work-related exposure and therefore Petitioner’s condition was an occupational disease arising out of his employment under § 39-72-408, MCA.