Mean soil resistivity

Soil resistivity has been measured from both ends of casings; as mean soil resistivity value shall be accepted any measured soil resistivity value on the area from the end to the middle of the casing for 3 and 2 crossings, adopted by soil resistivity measurements at 1.1 and 1.2

=2,64*0,5+3,64*0,5=3,14 Ohm*m

For crossing 1 and the pipeline, adopted by soil resistivity measurements at 8.1 and 1.2

=16,33*0,5+3,64*0,5=9,98 Ом*м

where:

– soil resistivity (Ohm*m)

– portion of pipeline length