Designed specifically for on the spot forensic investigations, this book discusses how to confirm the reported identity of a substance at a port of entry, hazardous materials emergency, waste site or laboratory triage facility when the identity of the hazardous material is given but not considered reliable. It covers how to verify the accuracy of a label to the contents by using a matrix of field tests. The author provides instructions on how to gather as much information as possible from the reported or labeled contents and use the gathered information to determine which physical and chemical tests listed in the book will confirm the identity of the suspect compound.