Do you ever ground a gas pipe?

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Things starts getting evenweirder. I found grounding water clamp really loose on the water meter location and very corroded. Got new clamp, cleaned pipe and installed new clamp. While doing this there was some sparking between wire and water clamp. Finally tightened screw and there was a humming in the RMC that protects the wire from grounding clamp to main disconnect. I clamped on my amperimeter and there was 25 amps reading. But before doing this I checked voltage from water pipe to gas pipe and 8 volts of course after installing grounding clamp there was 0 voltage. Before fixing water clamp I could read voltage to ground from the line wires, one was 108 and the other was 127 and between them was 208v. After fixing grounding water clamp voltage changed to 115 and the other to 121volts. Ok, that amps is someting it has to corrected. Well all of this was done in the basement (old building) this is a service of 225 Amps (well that's what the main breaker is) feeding 8 small stores (maybe 20' by 30' each) When I went up to the store where I had the problem I measured between gas pipe and grounding screw I still have 1.8 volts. Of course there is still some spark if we short them together. What the heck is this? Tomorrow,I am calling the POCO I think their neutral is open. Well What you guys think?
 
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