Radiological Survey Data
(Click images to download PDF)		 Radiological Survey Data Contours Sample Locations Survey Data Averaged
Using GIS the different count rate ranges are assigned a unique symbol or color to assist in identifying contamination boundary. Using GIS the individual counts are used to create contours of the survey data. Individual sample locations can be surveyed and unique symbols or colors assigned to result ranges. These data can then be compared to radiological survey. The survey area is dissected into squares and the counts in each square are averaged.


  • We began using GPS in 1994.
  • We have conducted surveys at numerous sites.
  • We have successfully cleaned up multiple sites with acreages in excess of 500 acres.
  • We have obtained approval by the NRC to use gamma data as primary verification data.

Phases of Radiological Surveys Support:

Site Characterization

  • Surface soil contamination
  • Collect data at points
  • Collect data on-the-move
  • Data presentation within hours
  • Gamma survey for up to 25 acres per day
  • Establish grids without land surveyors
  • Document soil sampling locations


Radiological Control Monitoring

  • Use data maps for establishing contaminant boundaries
  • Use GPS to set stakes at boundary lines
  • GPS radiological surveys quickly document decontamination progress
  • Replace old data with new data in removal areas for a final status survey


Final Verification

  • High density gamma data presentations provide high degree of assurance that property has been decontaminated
  • High density gamma data may serve as principal method of verification when coupled with radionuclide-in-soil correlations