A federal agency has fined Dedicated TCS LLC $226,310 for failing to take safety precautions that might have prevented the October death of a worker who suffocated while cleaning a tank car in New Orleans.

An air quality test and harnesses properly tethered to a lifeline for rescue might have prevented the tragedy, which also hospitalized two other workers, the U.S. Department of Labor’s Occupational Safety and Health Administration said.

OSHA found Dedicated TCS failed to test the atmosphere inside the tanker before the three employees entered the tank. The company also didn’t require the workers to attach a lifeline to their harnesses to allow a rescue.

OSHA has cited Dedicated TCS for the same confined space violations three times before at its locations in Illinois.