CONTAINED IN VOL 11.05 , 2000Outlines procedures and criteria for (deployment) development, and use of mathematical models to integrate knowledge of environmental partitioning, transport, and transformation for use in predictive risk assessments, establishing minimum criteria for distinguishing acceptable models from those incomplete, untested, or inappropriate for intended uses. It applies to models in and among environmental media (air, water, land) and addresses evaluation of the generic characteristics of the same.