The first edition of the book was published ten years ago, and since then there have been many modifications and improvements in the analytical procedures for measuring trace pollutants in environmental matrices. In this new edition, all such analytical methodologies presented in the first book are fully revised and updated, and new methods are introduced. Several completely new chapters are added such as Capillary Electrophoresis, X-Ray Method, Haloacetic Acids, and Nitroaromatics. Other chapters are completely rewritten such as Gas Chromatography/Mass Spectroscopy and Atomic Absorption and Emission Spectroscopy. A new appendix, Characteristics of Hazardous Wastes, is added as well.