BEND, OR -- Two labor unions representing front line workers at St. Charles launched a petition drive this week, to push the health system for an independent audit of its payroll practices.

They say accounting failures resulted in more than $2 million in alleged payroll overpayments the hospital now says staff must pay back. Union members say they won’t agree to a repayment plan proposed by St. Charles until a third-party provides specific details on when the overpayments - if any - occurred.