Because the importance of industrial pollution abatement contributes to grow, this work was initiated to develop possible solutions for environmental problems that an oil-shale processing industry may create. Although the commercial production of fuel from oil shale is still in the future, it is realized that adequate disposal of waste products from a large oil-shale processing plant may present major problems. The bureau of Mines, U. S. Department of the Interior, has initiated research to identify and propose solutions for the waste disposal problems in advance of industrial development as a guide to the incorporation of environmentally acceptable disposal processes in future plants..