Three Rivers Volunteer Fire Chief Bobby Stewart said the call came in around 6:30 a.m. Friday, and the tanks were fully involved when firefighters arrived.
The tank facility is used to separate oil and condensates from water extracted from oil and gas wells.
Stewart said the plan is to let the fire burn itself out. Firefighters are only making sure runoff does not escape the site.
There have been no injuries.
The George West Volunteer Fire Department is the lead agency at the scene, but Stewart is in charge because George West’s chief is out of town.