The complaint references five violations of the air quality permit that allows Threemile to operate methane digesters that the dairy uses to capture methane from liquefied cow manure.
The violations stemmed from Threemile overusing a natural gas burner at the digester facility to dry manure so it could be reused as animal bedding.
The program sets a cap on the carbon intensity of gasoline, diesel and other transportation fuels that declines over time.
Companies like Threemile can generate credits by producing fuels that are less carbon-intensive than traditional fossil fuels like gasoline or diesel.