Methane and other gases that often occur with it can be a significant hazard throughout the construction process. It is vital that construction professionals take these gases into account and assess the risks they pose both during and following construction. This book arms the reader with information to recognize potential methane problems and initiate the process of finding solutions for them. After a summary of the physical and chemical properties of these gases, the book describes their hazardous characteristics. How and in what situation methane is formed, how it moves or can be moved in the ground, and how the source of the methane can be identified are all explained. Case studies and scenarios of typical situations show how and when methane can affect construction projects.