It probably is. But my car is a street car and that coolant is legal for it.
So NHRA can suck it up and clean it up.
And you are less likely to have a leak using Evans coolant because it does not build pressure.
If the coolant is on the track because I hit the wall, caught on fire and backed it in to the hotdog stand (from my circle track days) NHRA will have enough clean up that you could use molasses for coolant and it would still be the least of the clean up time.