Critical Review of Aquatic Ecosystem Models: In the Charge Question #1,
EPA has asked the Panel to comment on the use of a community simulation
model, and to consider other models for this program. The enclosed
chapter from the open literature provides a critical review of aquatic
ecological toxicology models, assessing the state of the art as of 2002
(prior to the adaptation of "CASM" to form the specific regulatory
CASM_Atrazine model).  This critical review indicates that CASM is a
highly realistic, flexible model that is adaptable to approaches such as
the one being considered by the Panel.

