A requirement of the company's licence since 1991 was undertaking six PRPs to 1996. These involve land treatment and using sanitary waste, handling and disposing of solid wastes, and off river treatment and use option. These have all been complied with and are currently being put into operation. Neither solid waste types contain significant levels of heavy metals or dangerous organic compounds. They are both environmentally benign, with beneficial uses.
Landfill is the current method of disposal and, while effective, has a limited future life.
Spreading on forestry land will involve the transport and application of the mixed solid waste in government and private forests as a source of humus and nutrient. Trials are currently being conducted with State Forests. Spreading on agricultural land is similar to forestry spreading but will be performed on privately owned farm land, specifically for agricultural use. An experimental site is being monitored under strict guidelines to ensure the material is having no adverse effects on soil or surface waters and ground waters. River Murray water at the inlet to the mill, treated waste water discharged from the mill and the river water receiving the mill discharge are monitored for a minimum of 21 specified parameters including nutrients, salts and metals.