– 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groundwater, except that which is extracted for ground control (dewatering)and discharged without use – Freshwater withdrawn for use as cooling water, that is chemically, physically or biologically modified at the final point of discharge and / or is returned to the environment with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 and / or is returned to the environment with a temperature change of greater than five degrees.