A Permit to Operate from the Glenn County Air Pollution Control District is required in order to operate an underground storage tank system in Glenn County. Air Pollution staff inspect UST facilities on an annual basis to assure compliance with applicable laws and regulations. The purpose of this program is to assure that hazardous materials stored in underground tanks are not released into the groundwater and/or the environment. The Permit to Operate incorporates a set of conditions for operation and continuous monitoring of the underground storage tank system.