Environmental forensics and the importance of source identification / Stephen M. Mudge -- Microbial techniques for environmental forensics / Andrew S. Ball, Jules N. Pretty and Rakhi Mahmud -- Spatial considerations of stable isotope analyses in environmental forensics / James R. Ehlerlinger ... [et al.] -- Diagnostic compounds for fingerprinting petroleum in the environment / Scott A. Stout and Zhendi Wang -- Perchlorate : is nature the main manufacturer? / Ioana G. Petrisor and James T. Wells -- Tracking chlorinated solvents in the environment / Ioana G. Petrisor and James T. Wells -- Groundwater pollution : the emerging role of environmental forensics / Stanley Feenstra and Michael O. Rivett.