I think they only switched to Epik/Voxility for a few hours after being kicked off Cloudflare, but I'm not familiar with where they would have been hosted or what services they used 3-4 years ago.
The garden is overseen by professionals, so it has likely had soil testing done, especially since they are growing produce.
Manhattan is mostly an island of bedrock, and there is no manufacturing or industrial areas in Lower Manhattan that would contaminate the soil. The only concern would be protecting the garden from water running off the streets bordering the park, but those all have drainage and curbs installed.
> Corpora is a collection of small files. It is not meant to be an exhaustive source of anything: a list of resources should contain somewhere in the vicinity of 1000 items.
Kevin was interviewed by his former TechTV co-worker Leo Laporte on Leo's podcast Triangulation, if you're interested in Kevin's story: http://twit.tv/show/triangulation/162