I can't believe that SOME fuel doesn't reach the ground
it does as road grime on your car windshield. Pretty much indistinguishable from every day dirt on shinny surfaces.
The ppm makes it low enough that very few know.
I was aboard a B747 where the pilot announced dumping fuel while over New Jersey. Some of us laughed about if the folks on the gorung would know.
I was never quite sure if his announcement was a pre event or during. I never did forget his announcement right after the first one
"please do not smoke"
I spoke to him afterwards and we both stated it was our first air-turn-back and fuel dump
.