A Canada Post outlet in Airdrie was closed on Monday morning while RCMP investigated a suspicious package.
Police were called to the business at 2945 Kingsview Boulevard at about 11:15 a.m. after employees found white powder leaking from a package.
The building was evacuated and EMS assessed those employees who may have been exposed.
Hazmat experts inspected the package and found that it contained a non-toxic material.
The building has since reopened to the public.