The contact elevation is the elevation at which changes occur in the interpreted stratigraphy or local geologic conditions as recorded in a boring log. EnviroInsite provides three ways to display contact elevation data:
•Post Value - post the numerical elevation of the contact elevation between two specified soil strata.
•Classed Post - colored symbols representing the contact elevation between two specified soil strata.
•Contour - line or fill contours of the contact elevation on a plan map between two specified soil strata.
These plot types and their controls are similar to the same plots used in displaying of measured data. The user is referred to the help pages for these other plots for information on specifying plot options: Post Data, Dot Plots and Contour. One thing to watch out for is the presence of multiple contacts between the same soil types, as in the case of a layered clay-sand aquifer, where multiple contacts occur at a single boring.