Description:

Analytical Services, Inc. (AS) specializes in the siting and completion of High-Yield Wells. Our staff of Certified Professional Geologists utilize a hands on approach to better understand the hydrogeologic conditions at each project location. Our methodology to locate high yield wells involves completing fracture trace analysis, reviewing available geologic mapping and any nearby well log information, performing field reconnaissance and geologic mapping, and completing geophysical surveys. The methodology utilizes the above “tools” to identify apparent transmissive zones within the underlying bedrock aquifer.

Fracture Trace Analysis

AS geologists utilize both low elevation and high elevation aerial photography. The photographs are analyzed stereoscopically to identify subtle lineaments indicative of zones of bedrock fracturing. The location of the lineaments are then transferred precisely onto site mapping. The fracture trace analysis extends beyond the site area and enables an evaluation of trends and apparent extent of fracture trace lineaments in the larger site area.

Above - Cross Section produced from Geophysical Survey data indicating the presence of a transmissive zone with the bedrock aquifer.

Geophysical Surveys

Geophysical surveys are utilized to gain additional subsurface information from apparent zones of bedrock fracture concentrations. High-resolution resistivity surveys, approximately 1000 feet in length, are completed in orientations to provide a better understanding of the bedrock geology. The surveys may also identify bedrock fractures that are not expressed surficially. Analysis of the survey data produces graphic cross sections that enable interpretation of contrasts in the conductivity of the underlying bedrock. Transmissive zones within a bedrock aquifer typically have higher conductivity characteristics than unfractured rock.