Measured hydraulic conductivity values;

Each well used to construct the cross section, including:

Well identifier (well number),

Distance and direction the well is offset from the line of section,

Total depth of borehole,

Well depth,

Screened interval, and

Water level and date measured;

Each borehole used to construct the cross section, including:

Borehole identifier (borehole number),

Distance and direction the borehole is offset from the line of section,

and

Borehole depth;

Information obtained from surface and borehole geophysical surveys, as

available; and

Total depths and liquid depths of natural and human made surface water bodies

and waste management units (e.g., streams, ditches, impoundments, ponds), as

available.

If these details are not available, the site characterization is inadequate. Figure 8 is an

example of an acceptable geologic cross section.

4.4.3

The Conceptual Model

Conceptualization is the process of integrating the individual components or

characteristics of the hydrogeologic system, including the characteristics of the managed

wastes. The conceptual model is the integrated picture of the hydrogeologic system and the

waste management setting. Conceptual models are expressed both narratively and graphically.

The two objectives of a conceptual model in a detection monitoring program are:

November 1992

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