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Jul 4, 2012 7:17 PM

HAZMAT crew determines downtown building was leaking Freon

TUCSON - Four Tucson firefighters have been taken to the hospital as a precaution this afternoon, after complaining of nausea after responding to a fire alarm.

At around 10:30 a.m., Tucson Fire Department responded to a fire alarm at a building downtown, at 32 N Stone. Crews donned protective equipment and headed to the building's basement, where the alarm originated, according to a TFD news release.

Once smoke was verified, additional units were called in and the building was evacuated. Two four-person crews entered the basement. Two members became nauseous while investigating the smoke, and no fire problem was found.

Hazardous materials crews arrived and used special tools, including air monitors, to determine what was leaking. It was determined that a chiller in the basement had a broken pipe that was emitting Freon into the air, which caused the appearance of fog.

Four firefighters were taken to a nearby hospital for evaluation, and building representatives are working to fix the broken pipe.

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