General Road and Highway Discussion

[danbrotherston]

See the examples I gave, for water testing, we do not accept any tainted water ever, when it does happen, we stop, and fix it.

Ah, no. Here, too, there is a limit, under which it's legal and above which it's illegal.
https://www.paracellabs.com/media/homeow...140515.pdf

Lowering the limit would be safer but cost more. Raising the limit would save money but be more risky.

Life is all about gray areas and compromises.

There is no evidence that lower would be safer...

And in fact, when water rises above the level which is considered safe, we stop and fix it.  If we determined that the level was actually unsafe, we would lower the limit.  And when our reporting system breaks down and we realize we aren't testing water sufficiently, we stop and fix that too.