Documentation for RUSTIC has been produced in two volumes. The subject of Volume I is model theory and code verification or testing. It contains a description of the theory underlying the PRZM, VADOFT, and SAFTMOD codes. The description of each code includes a brief overview highlighting the features and limitations of each code. This is followed by detailed descriptions of the algorithms involved in each code and how they are solved numerically. The description of each of these models concludes with a section on algorithm testing. The fifth section of Volume I contains a description of the theory behind the linkage of the three codes to provide a cohesive simulation of the movement of pesticides following application, through the root zone, the vadose zone, and the saturated zone to a drinking water well. Section 6 of Volume I covers the theory behind the uncertainty preprocessor. Volume I concludes with model development references and appendices.

EPA Project officer: Robert F. Carsel. EPA Contract No. 68-03-6304.

Vol. 1: Theory and code verification -- Vol. 2: User's guide.