Sienar Refinery

this was the name given to the immense refinery and reclamation facility established on Raxus Prime by Sienar Fleet Systems, during the last decades of the Old Republic.

Scientists at the Sienar Refinery discovered that the sewers of Raxus Prime were constructed to help sweep away waste many thousands of years before the Battle of Geonosis, indicating that the planet had been a toxic wasteland for many generations.