On 23/05/2011 14:58, David Paste wrote:

Right. Really? I mean, really? Bugs build up a resistance to peracetic
acid?!


I'll be surprised if they don't. Give them enough time, and a
growth-limiting but non-lethal dose, and they'll be away. Such
conditions will be found in the local drains if nowhere else.

Have a read on http://en.wikipedia.org/wiki/Extremophile

Andy