Sampling is such a basic factor in the success of any attempt to monitor plant performance or control processing that its importance is often overlooked. This updated manual, seeks to provide the collector of samples with procedures for collection and documentation. Each chapter addresses a specific aspect of the process, such as sample type, sample location, volume of sample, and type and frequency of analyses. Other topics covered are manual and automatic sampling, equipment and flow devices, sample collection, preservation and handling, data collection, recording techniques, and preparing data for use. Methods for compiling data and examples of different reporting forms are also included.