Well design specification (WDS) software

For use in fabricating a well for monitoring or remediation of contaminated soil and groundwater

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Prototype above displays (from left to right): a fluorescence penetrometer log (indicative of relative petroleum contaminant level); soil classification log, and; the filter pack and slot size recommendations for each depth penetrated.

Groundwater testing well installers often skip good design practices in favor of a one-size-fits-all approach. For example, a filter pack design is required by ASTM D5092, however, installers often avoid the costly and time-consuming practices of soil sampling, sieve analysis, and referencing industry standards.

This becomes particularly true in situations where two mobilizations are needed to characterize the site and to install the well. The cost savings is a false economy when measured against a well design that risks:

  • Turbid and improperly filtered samples
  • Pump damage
  • Reduced yield and the loss of a filter pack

The WDS software developed by Navy scientists allows a user to specify candidate depth ranges and then, select the appropriate well design parameters for depths of interest. Cone penetrometer types of sensors are used to yield data that the WDS software can translate for selection of appropriate filter pack and well screen slot size specifications at the proposed screen depth ranges. WDS employs a conversion matrix based on synthetic grain-size distribution curves corresponding to the probe sensor descriptors. Instead of a probe snapshot, WDS software gives a full profile for decision making.

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