[NLRS] line noise

[Herb Krumich]

Someone on this logger had mentioned he had bad line noise due to salt or brine being put on the roads over the contest weekend.
I am in the Pocono's in Pa,  got hammered on 50 mhz over the weekend. And yes we live on a state road which was treated, since we had 8 inches of snow on Saturday.
By Monday ( thank you ), the noise had vanished
Please fill me in
Thank you
Herb at WA2FGK FN21