That would seem to be a problem. hard to give you any advice on it without more information though.We have a one inch EMT, with data lines, through a concrete floor that is creating sparks and flames. I have pictures of the conduit I would like to attach.
The sparks and flames have been seen where you indicated in your question, right around the conduit where it comes out of the floor.Don't see anything unusual. Where are the sparks and flames coming from? Looks to be some blackening around the hole through the slab from the underside.
I don't doubt that this slab is a fire rated assembly. Where is the fire stop around the conduit? It should also probably be sleeved with schedule 40 pipe as well to 4" above the floor. There are UL listed assemblies that are also water resistant. Probably liquid wax resistant, for that matter. I don't see how data lines, in and of themselves, could be causing any fireworks, especially on the outside of the conduit.The sparks and flames have been seen where you indicated in your question, right around the conduit where it comes out of the floor.
A bit out of my league, but I was about to say... wouldn't there have to be something actually flammable in the hole, such as rag (good catch Hal)??...they may have stuffed a rag down the hole...