hydrocarbons

Report it first. If you're found out, you'll face big fines or worse.
When you report it, there will be measures you will be asked to follow. Do so. If its near a water source, manhole, sewage drains or god forbid a stream, you're first objection is to try and contain the spill.

not that type of oil spill im talking where these companies get the source of its supply

thank you sincerely