This book provides a balanced, comprehensive introduction to major application of Visible Near Infrared Diffuse Reflectance Spectroscopy (VisNIR DRS) in detecting oil contaminated soils. Moreover, the approaches will provide a methodology that could be adapted by many of the reclamation agencies and organizations involved, directly benefiting the people, wildlife and the environment. This updated book is appropriate for students preparing for careers in industry and environmental organizations. Basic knowledge of chemistry and statistics is prerequisite.