Incident #1
An atmospheric tank overfilled with glycol. The glycol came in contact with a nearby burner, igniting and causing a fire.
Incdient #2
Employees #1 and #2 were installing a platform on top of a storage tank
containing ethylene glycol. While the tank was receiving an ethylene
glycol mixture from the process line, Employee #1 began to weld a clip
on the tank. Shortly after striking the arc, the top of the tank blew
open and the contents ignited. Employee #1 received burns, lacerations,
and fractures which later resulted in his death and Employee #2 received
minor cuts and bruises.
Source: osha.gov
Have you checked the MSDS of the glycols you are using? Often operators think that glycol is not flammable.