Filling the tanks of the UFOs.
I seriously doubt his 'punishment' will stand after he appeals for hardship to access water to grow, and nothing can be found for financial penalties for him having sold a public resource which was not his to sell.
Clickable youtube link:
Mysterious Haul: Tanker trucks on the New Mexico prairie trigger investigation
"Filling the tanks"; at a nearby construction site; to test for leaks; before filling them with oil.