United States EPA has deployed what the agency calls its most complex mobile equipment for chemical testing into the village of East Palestine. 

It's a mobile laboratory on wheels called the "Trace Atmospheric Gas Analyzer."

The U.S. EPA chemist working inside this bus, Dave Mickunas, said the mobile lab will sample and monitor for chemical compounds "instantly" using multiple pieces of equipment and will provide a more visual, accurate analysis of chemical presence.

The type of technology used is called "gas chromatography-mass spectrometer and "tandem mass spectrometer."

"We can take air from outside, bring it in, filter out the compounds of interest, analyze it, report them out within a second," Mickunas said. 

Previously, he said technology took days before seeing results, so this means faster data on the ground to then be passed onto EPA responders of East Palestine. 

"This offers real-time measurements being compound-specific, versus what was offered before," he said, "[Before] They were using a general detector."

After pressing whether this state-of-the-art equipment will test for additional chemical byproducts that outside experts express concern about, such as dioxins, 21 News is told this testing is still targeted towards the toxins present on the Norfolk Southern train during the derailment. 

"Those are the ones that we are mainly focused on,"  he said, "We have other capabilities if required, but those are the ones we are focused on bc that's the way these instruments operate."

It was hours later Thursday, that U.S. EPA announced they are ordering Norfolk Southern to test for dioxins. 

The U.S. EPA Region 5 said the mobile lab hasn't started testing yet.

21 New is waiting to hear when and where the mobile testing will take place, as well as how exactly this additional testing will help the public better understand what specific chemicals are present and what the potential health risks are following this incident.