In other words, gasoline. Gasoline contains a good fraction of hexane.
No, it was Zep I.D. Red (Liquid) - a degreaser. And they never dumped it, it just evaporated away.
Zep I.D. Red is a fast-evaporating industrial degreaser designed for use where fast evaporation and no residue are desirable. This versatile, fast-evaporating liquid degreaser combines speed in cleaning with high solvent power, but without chlorinated solvents or ozone depleting compounds (ODCs), such as 1,1,1, trichloroethane. Zep I.D.Red leaves no residue and is non-corrosive to metals. It may be used in a variety of applications by spraying and/or wiping. Removes oil deposits, grease, dirt, tar and lubricating compounds from circuit boards, electrical contacts, electric motors, machinery parts, electronic equipment, molds, textiles, etc. It's non-emulsifying formula does not interfere with oil/water separators. It is a thin, colorless liquid with a mild, solvent odor.
Here's some more info:
Plant owner may face $1.5 billion in fines (EPA is at it again!) Posted by Gritty on 09/26/2003
EPA contests amount of fine [EPA continues to harass small NC business owner - mine] posted by snopercod on 09/27/2003