This tank is one of five that treats petrochemical and refinery wastewater in Houston, Texas. It has four directional jet aerators that mix the liquid in a counterclockwise motion. The plant collects wastewater from approximately fifty industries surrounding the plant.
The plant was initially constructed to aerate the wastewater using air, but was later converted to use pure oxygen. The conversion was intended for expansion purposes, as well as to reduce the volatile emissions being released into the atmosphere. By adding pure oxygen, the plant is able to increase capacity by 200-300%.