Still further in accordance with the present invention, the pipe to soil potential measurement may be made utilizing electrical ground cables or similar structures in {TAIL ~ urban areas} in the vicinity of {HEAD ~ power grid substations}, for example 
Still further in accordance with the present invention , the pipe to soil potential measurement may be made utilizing electrical ground cables or similar structures in { TAIL ~ urban areas } in the vicinity of { HEAD ~ power grid substations } , for example
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH