The purpose of this report is to provide a review of chemical precipitation processes for the treatment of low and intermediate level aqueous waste. It supersedes Technical Reports Series No. 89, Chemical Treatment of Radioactive Wastes, published in 1968. It provides data on the performance of existing plants and on improved processes that are in an advanced state of development. Contents: 1. Introduction; 2. Waste segregation and characterization; 3. Chemical and adsorptive precipitation and flocculation; 4. Examples of chemical treatment facilities; 5. Process selection; 6. Process equipment; 7. Sludge conditioning; 8. Concluding remarks.