Topband: FM on 2.250?

[Jamie WW3S]

I;ve been plagued with a noise problem here on 160 that has been driving me
crazy. The noise seems centered on 2.250 mc.  Just when I thought it was BCI
from the local AM station on 1490, I was cycling thru the modes on my TS850
and it seems to be FM!! With 18db of attentuation and using my C3 the signal
is 40db over S9. On my 160m Inv L its 60+ even with the 18db in. It sounded
like a dead carrier but then I started hearing what sounds like old style
analog data. No real pattern but every 3-5 minutes it will send small bursts
of data, almost like a metering circuit. It also appears to have voice
traffice on it at times although I can't understand it ( maybe narrow fm?)
There is a National Fuel pump station close by ( less than 1 mile). Could
this maybe be there stuff? I've been trying to do the math for
mixing/rectification/BCI on the 1490 station as the 3rd harmonic is very
loud on 4.470
but isn't that loud on 2.980. I don't think it commercial power.....Anybody
have any ideas?