This report describes a four-stage screening process for identifying waste streams that are listed as hazardous in the Federal Register (Vol. 45, pp. 74890-74892, November 12, 1980) and that are promising candidates for land treatment research. The first stage used an inorganic screen for waste streams listed as hazardous solely on the basis of heavy metal content. Stage 2 used an organic screen for waste streams listed as hazardous solely on the basis of organic chemical content. The screening was based primarily on the potential for degradation of hazardous components in the soil. Stage 3 applied an inorganic and an organic screen in sequence to the two waste streams listed as hazardous because they contained both heavy metals and organic chemicals. Stage 4 involved waste streams listed as hazardous on the basis of cyanide content. Available data were insufficient to identify promising research candidates. Therefore, cyanides can be degraded in a suitable designed land treatment facility. The land-limiting constituent of these waste streams is more likely to be heavy metals than cyanides.