Bill...Thanks for the lesson. Here is the chain of events. I took the samples on the afternoon of saturday the 11th. They were placed in a cooler and then stored in the refridgerator until monday. They were then shipped priority overnight to the lab and then analyzed on the 17th. The kit consisted of 2-16oz plastic sampling bottles. Based off of that would you completely disregard the Nitrat tests? I believe I've seen some simple field kits for Nitrates and Phos. Are the kits fairly reliable?

Thanks again,
Mike