The first site visited was the petrosantander water flood in the stewart field just northeast of garden city a few miles. Petrosantander took the water flood over about 10 years ago, and has worked with the doe and Kansas geological survey (kgs) to study the flood and improve efficiencies. In terms of water management, petrosantander reinjects 100% of the water produced back into the morrow formation for enhanced recovery. Prior to reinjection the water is first run through a phase separator, which separates the water from the oil and gas. Chemical amendments are then added to the water (scale and bacteria inhibitors) and it is pumped to a series of tanks. The water is pumped centrifugally into the tanks to prevent stagnation and increase residence time in each tank. Oil is skimmed out of each tank, as necessary. The water is then pumped through a 50 micron sock filter to remove solids that may plug the reinjection wells. The water is pumped back out into the field and reinjected along with any makeup water that is added as necessary.