Book excerpt: The contamination of soil and groundwater resulting from exploration, transportation, storage and handling of petrochemicals has become widespread and has produced an overwhelming number of contaminated sites in every country of the world that require investigation and remediation. This book presents step-by-step investigation methodology from initial site assessment to closure in an integrated and understandable format. The book explains effortlessly about regulatory requirements, phased approach for site assessments, site investigation methodology, soil and groundwater sampling techniques and also about documenting the investigation results through technical report writing. The emphasis is laid upon investigation methodology in the field, which is the key factor in quality assurance of the investigational work. Environmental site investigation, site characterizations, remediation planning, and report writing are all covered in detail. The book is of great value for environmental consultants, regulatory agency personnel, environmental engineers and geologists, and environmental attorneys. In addition, this is advisable to all field professionals to have an all time access to this book as a guide to quality work during the contaminated site investigation.