Yes, black ice is not a good name, it should say transparent on the road' ice.
I almost made a Dont Eat Yellow Snow tshirt for us, but not because Lilly has a way to turn snow yellow, but the transformer on our downed elec pole during the storm was leaking its yellow insulation goo, and it made the snow turn yellow.
I did put up a quick page to show the entire ordeal for fun, and emailed it to the elec guys.
But the elec company guy(the boss) asked me to take 'yellow goo' off my page and put in 'non-toxic mineral oil' instead. Which I did.
It was not PCB, they tested it right away when I called them, as we have well water here, and the 'plume' was headed for the catch basin which brings some water near our well point. As when they salt our dirt road to the side of our property, we taste salt very soon, and it takes about a month to dilute and go away. The "Clean Harbors" company came in a HUGE truck with a vaccum sort of thing and sucked all the yellow snow up, and along with that, the dirt below it too.
So we dont have to drink Yellow Snow.
Jane