In order to clarify the potential problems and information gaps for the site, it may be
advisable to develop a conceptual model in the form of a flow diagram or site map.
A conceptual model is a representation, either written or illustrative, of the
predicted relationships between ecological values and contaminants. Examples of a
conceptual model diagram for XYZ
Enterprises is shownbelow, but you may choose to undertake this process using a different
diagrammatic approach. Examples of other conceptual models are shown in USEPA 1998 Appendix C.