This is volume 7 of the Environmental Monitoring Handbook series. Each volume of this series discusses different aspects of environmental monitoring. One of the first topics discussed in this volume is the topic of cleanrooms and ways to prevent contamination. Subject matter experts Dr. Tim Sandle, Jan Eudy, Jim Polarine, John Lindsay and others describe new and/or better ways to do things. The second section of the book describes various environmental monitoring techniques and methods and includes informative chapters from Ryan Burke, Allan Marinelli, Dr. Andrew Sage, Tim Cser, Sean Toler, Claire Fritz Briglia and others. The third section of the book deals with changes to standards. Memarzadeh and DeBerandinis explain the changes that occurred for ANSI Standard 29.14 and how this is applicable in pharmaceutical environments and the last section of this volume talks about new technologies and aids that can be used in evaluating these methods with chapters from Dr. Sage and Dr. JP Jiang. There is a wealth of useful information that you can use in establishing, maintaining and updating your environmental monitoring program!