[Elecraft] "Quiet" locations and K3 + P3 inquiry

[Missouri Guy]

Hi Gents,

I have a question for those of you that have truly quiet
(can hear a "pin drop"!) locations AND have the the K3+P3 
combo AND have 160m receiving antennas:

When tuned to say, 1830kHz, and the span is set for
say, +-30 khz, what averaged noise level do you
see on your P3 screen?

The reason I ask is that our power co guys were in the neighborhood
today and I (so far) have made some huge improvements in noise
reduction.

Thanks,
Charlie, N0TT