Assessment of Radium and Toxic Element Distribution At a Phosphate Slag Stockpile.
Boyle-JR Jr.; May-A
Proc Western Reg Symp on Mining & Mineral Processing Wastes Berkeley SME 1990 :87-91
The U.S. Bureau of Mines conducted studies to determine if phosphate slag stockpiles at Tennessee Valley Authority's National Fertilizer Development Center were hazardous materials. The stockpiles were not hazardous materials as determined by the Environmental Protection Agency (EPA) extraction procedure (ep) toxicity test. Radium-226 concentration was 28.7 Pci/g in slag and 2.1 Pci/g in background material. Radium-226 was not leached from the slag into the soil. Slag material permeability was 1.65 X 10-3 cm/s, and subsurface material permeability was 3.24 X 10-6 cm/s. Rain water, trapped in a depression on top of the east stockpile, became seepage water at the base of the stockpile. Concentrations of EPA toxic elements in the seepage water were much less than concentrations from an EPA ep toxicity test on the slag.
Proc. Western Reg. Symp. on Mining & Mineral Processing Wastes, Berkeley; SME, 1990, PP. 87-91