[paulcnichols]

Re Mercury, on the San Jose side isn't there an old Mercury mine (Almaden Quicksilver Park). I'm not saying the fog doesn't carry anything bad but I think the region has a history too.

[bproven]

Yes, there is. It was a afaik Superfund site before it was a park.

[hammock]

Pretty much the entire South Bay is a Superfund site.