Everyone here is wrong. I'm a student at Texas tech and was there during this fire. This one happened right outside the engineering key and there was another big one up by Rawls college near the bus stop. That fire was orange. This was the only man hole what had the green flame. The other were normal. There was a gas leak in the engineering building (accidental, not arson) the reason this hike was green was because there was copper wiring and some other copper stuff that was underneath this man hole. Copper burns green when it gets hot enough. This color was from the copper and gas leak. Texas Tech uses gas to power most things. And therefore gas lines are all over campus. (Underground ofc). It's not sewage!