The Postal Service said it was informed that an employee at the Wellington Avenue processing plant tested positive for COVID-19 on November 3.
According to Canada Post, the employee was last at work on October 26 and was not symptomatic at the time.
A day later, on November 4, Canada Post said it learned of two more positive cases at the facility.
The Postal Service said those employees worked in different sections of the establishment at different times of the day. The workers were the last to work on October 29 and were not symptomatic.
“We certainly understand that operation during COVID-19 can cause concern for employees,” Canada Post said in an email. “That is why, from the start, we have been committed to closely following the advice of public health officials at national and local levels to ensure the safety of employees and the people they serve.
The company said it has many security measures in place and meets all the requirements of each community.
It said it has implemented physical distancing at all of its facilities, has visible markings, staggered start times if necessary, increased cleaning and availability of safety equipment, and providing reusable face coverings and disinfectants.