Suspect material at shapeoko3

I was working with the shapeoko3 today and saw that someone had left some material that appears to be carbon fiber at the machine. It could be faux carbon fiber but I am not sure . If this is actual carbon fiber sheet, I don’t think that this is allowed at DMS in the machine shop due to respiratory health concerns . If this is yours, please collect it and don’t machine it on the shapeoko of it is carbon fiber.