Project: T163700 #3717
 

The extension to this project will have the following scope. The emphasis would be onfield testing.

Phase ITask

  • 1.1: Locate tests in an area with known geological structures (conductive surface ofconsistent resistivity and thickness over bedrock) near an interconnected transformer station ormultiple grounded distribution neutral.
  • Task 1.2: Conduct several classic Wenner tests as a reference to at least 300 m.- Minimum 2 and up to 4 Wenner surveys at the chosen location will beperformed.
  • Task 1.3: Conduct Half Wenner, Half Schlumberger and the Modified Palmer tests to see if asmaller probe span is sufficient to resolve the bedrock resistivity. The number of tests to beconducted for each method:
    • Half Wenner - minimum 2 and up to 4 surveys
    • Half Schlumberger - minimum 2 and up to 4 surveys
    • Modified Palmer - minimum 2 and up to 4 surveys
  • Task 1.4: At an isolated electrode in the same area use the Fall of Potential testing asdescribed in [1] Sections 9.8 and 9.9 to see what probe spacing is needed to resolve the bedrockresistivity.
  • Task 1.5: Using the interconnected station (or multiple grounded distribution neutral) repeat the Fall of Potential tests with: a) current splits not measured; b) real component of current splitmeasured; c) magnitude and phase angle of current split measured with a network analyzer orequivalent. For each see what P2 probe distance is required to resolve the basement layer.
  • Task 1.6: Completion of preliminary analysis and report

Phase II:

  • Task 2.1: Upon the successful completion of Phase I a second area will selected and tested toprovide redundancy in results and increase confidence in the test methods employed. Here, basedon the results obtained in the first phase, the testing will be repeated using the most efficient methodand test protocols.
  • Task 2.2: Completion of final report