The Authority to Construct permits were issued by the San Joaquin Valley Air Pollution Control District following an extensive technical review and two public comment periods. In September 2023, Aemetis received approval from the City of Riverbank for the Use Permit and California Environmental Quality Act (CEQA) review after a separate technical review and public comment process. Together, these permits are the key permits needed for Aemetis to proceed with engineering and financing to construct the plant.