This video will show you the proper techniques and methods for collecting samples for laboratory analysis. You will learn what information is necessary to properly document samples, including how to complete a chain of custody. You will learn the best way to perform a grab sample collection. The video will take you through the steps of labeling and storing the sample. You will be shown the correct procedure for collecting a drinking water sample from a tap for microbiological analyses. You will be introduced to composite sampling and will see how an automatic sampler is used to collect composite samples. You will learn various techniques to correctly preserve a sample. This video explains the holding-time requirements for various laboratory tests. Run time: 25 minutes.