Freshwater withdrawn and used Freshwater withdrawn and used includes: – Imported surface water (water provided by a third party for Rio Tinto use); – On-site impounded water used in process applications; – Imported groundwater; – On-site groundwater, except that which is extracted for ground control (dewatering) and discharged without use; and – Freshwater withdrawn for use as cooling water, that is chemically, physically or biologically modified at the final point of discharge and / or is returned to the environment with a temperature change of greater than five degrees.