This publication includes peer-reviewed manuscripts from the 2013 International Network of Environmental Forensics (INEF) Conference held at Pennsylvania State College, USA. INEF is an organization founded by environmental forensic scientists for the express purpose of sharing and disseminating environmental forensic information to the international scientific community. This professionally edited book is the third of a series of INEF conference publications chronicling the current state of the art in environmental forensics.

Since the first INEF conference held in Qingdao, China in 2008, significant advances in the state of the art in environmental forensics have occurred, especially in the fields of compound specific isotope analysis (CSIA), biological and petroleum hydrocarbon pattern recognition and the use of advanced multivariate techniques for interpreting environmental forensics data. Of note in these proceedings is the application of environmental forensic techniques to examine contaminant issues associated with hydrofracking which has received considerable international attention in the past several years.

Providing an update on the advancement and refinement of environmental forensic techniques, this book is aimed at scientists, regulators, academics and consultants from throughout the world.

Robert Morrison has a B.S. in Geology, a M.S. in Environmental Studies, a M.S. in Environmental Engineering and a Ph.D. in Soil Physics from the University of Wisconsin at Madison. He has worked for 38 years as an environmental consultant on projects related to soil and groundwater contamination, including site investigations and remediation. His current specialization is in the forensic review and interpretation of scientific data for the purpose of identifying the source and age of a contaminant release. Gwen O'Sullivan is currently an environmental chemist with Trium Environmental Solutions Inc. (TRIUM). In this role she is responsible for project management, business development, litigation support, and independent scientific investigation. She has B.Sc. in Environmental Sciences from University of Limerick in 1999, and a Ph.D from the Environmental Engineering Research Center within the department of Engineering at Queen's University of Belfast in 2004. She has worked on numerous projects and designed and managed environmental forensics investigations involving compounds of major concern.

A Forensic Analysis of Contaminant Releases from a Sewer Pipe; Interpreting Tar Patterns at Former Manufactured Gas Plants; Failures in the Historical Age Dating of Separated Phased Product Leaded Gasoline Releases in the United States Forensic Geochemical Community; Methane Vapor Intrusion Case Study: Interpretation of Complex Environmental Data; NAPL Source Identification Utilizing Data from laser Induced Fluorescence (LIF) Screening Tools; Environmental Forensic Investigation for Identifying Sources of Polycyclic Aromatic Hydrocarbons in a Stream; Modeled PCN Weathering Series in Principal Component Space: Consideration for Multivariate  Chemical Fingerprinting; Techniques to Age Date Human Exposure to PCBs; The Use of Compound Specific Isotope Analysis (CSIA) for Discerning Sources of Trichloroethylene (TCE) and Perchloroethylene (PCE) within a Commingled Groundwater Plume in California, USA; Source Attribution of Industrial Fugitive Dusts: Case Studies for the Environment Agency, UK; Strategies and Techniques for Identifying Unknown Compounds in Environmental Samples; Defensible Data Begins with Proper Field Protocols; Basic Fundamental Aspects of Environmental Forensics Investigations; Phytoforensics: Sampling, Analytical Methods and Case Studies; Identifying the Sources of Chemical Contamination after the Fact; Author Index; Subject Index