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In Doc1.pdf I mistakenly plotted the apparent resistivity(ohm-m).

I have two more short measurements which are not close to Test 1 and 2 but closer to Test3 3, 4 and 5. These two measurements S1 and S2 are consistent with Tests 1 and 2. I have attaché the graph for Measured Apparent resistance in ohm not Apparent resistance(ohm-m). It seems that the soil...

In homogenous soil, as the probe spacing increases, measurement resistance R=∆V/∆I=Resistance decreases(see the attached file)http://files.engineering.com/getfile.aspx?folder=15c4575e-048b-4f2f-80b0-6e61a7d1ae99&file=Doc2.pdf

I got a good set of measurement from two other locations(R-1,R-2)as you can see from the attached file. The other previous measurements data were not good. http://files.engineering.com/getfile.aspx?folder=863c7c2f-3a8a-484f-bd9b-d5aad885760f&file=Doc1.pdf

That is correct for this reason we are interested in soil resistivity of the entire site without impact of any metallic objects as you named during the measurements. The given measurements data are not a good representation for coming up with a soil model.

The measured apparent resistance should decrease with increasing the electrode spacing, we do not see this trend up to almost 7 feet.

Hi All, I have a soil measurement as it is shown in the attached excel file. It is a Wenner method. I know measurements are not good. What is your suggestion to come of with a soil model to be a good representation of the soil model for the site. Thanks...