Sampling Objective to take a representative sample of water for analyses. Strict sampling protocols have been developed by State and Federal agencies to collect representative samples. Sampling of groundwater represents some unique problems related to well design and placement.
Water is drawn into the well through a screen.
At least three volumes need to be drawn out before one can expect to have a representative sample. Some of the physical properties and constituent concentration will change upon storage and need to be analyzed on site or in situ. Example of a study in which onsite analysis of samples collected using a depth-specific well design combined with on site analyses. Once you have the samples, you often need to submit it to a laboratory for further analysis. There are many techniques but one of the problems is having a sense of the errors in the analyses.