Cross-sections present two-dimensional previews of the subsurface and are generated using Strater a Golden Software program. BESST uses cross-sections to identify and differentiate key hydrostratigraphic layers by using correlations among well and pump constructions, lithology logs, geophysical logs, and dynamic flow & depth-dependent chemistry. Cross-sections are of economic value to water purveyors because they provide insight into the underlying occurrences of contamination and the physical or chemical controls on groundwater flow and contaminant transport without performing downhole diagnostics for each well within the field of study. More importantly, the cross-sections define lithologic boundaries that apparently attenuate contaminant levels with depth thus illustrating a potential target depth for well modification through the use of inflatable packers.