For sampling, I've always used a 5 foot length of 0.5" ID PVC pipe to dip into deeper water and draw out a sample from below the surface. A nice way to do it without getting your arm wet (and cold) as long as you can briefly hold the water in the pipe with your thumb or rig up a valve on one end of the pipe.
Hmmm... interesting. Sounds like what we really need is about a 3' long turkey baster <G>