I remember reading about some of the criminal charges that were being filed, and in one instance at least, someone was being charged for "criminal negligence" (or whatever) in the water testing that they did. But after reading about the procedure they used, I thought to myself that AFAIK their procedure seemed valid, so I couldn't understand why they were being charged.

Now granted, it could probably be argued that their procedure could have been more comprehensive. But for the testing they were actually trying to do (determine how much lead was leaching from the main water lines) the procedure they did use seemed to me to be a valid one.