DALLAS Hundreds of residents from an area ranging from Woodall Rodgers Freeway to Interstate 635 in Dallas reported a mysterious odor in the air Saturday.

According to Jason Evans, a spokesman with Dallas Fire-Rescue, at about 11:40 a.m., DFR received a call of a 'strange chemical odor' that appeared to be coming from the United Recyclers facility. A hazardous material team was assigned to the case and found the odor was a result of a byproduct created during the recycling of motor oil.

'Whatever piece of equipment they use for this process heated up to the point that it started venting out of the facility,' Evans said.

Evans said the hazardous material team reported the byproduct isn't dangerous.

'And it may take some time for the smell to dissipate,' he said.

Andy Rodriguez, a resident in the area, said the smell spurred concern.

'I don't know if I should go home or not because I'm not sure if it's gas, or just a smell like gas,' she said.

Authorities are still investigating the incident to confirm whether the smell is indeed the result of the motor oil recycling process.

WFAA's Jobin Panicker contributed to this report

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