Preface.- Contributors.- 1. Site characterisation.- 1.1. Methodology and approach to environmental site investigations of large industrial sites in order to obtain optimal cost/benefit ratios: case study of the ISAB - Erg Petroli refinery at Priolo Gargallo (SR), Italy; M. Pupeza et al.- 1.2. Radiation contamination of forest ecosystems investigation: field experiments, modeling and simulation; O. Orlov et al.- 1.3. Risk assessment and remediation of military and ammunition sites; A. Gerth, A. Hebner.- 2. Biological bases of biological remediation.- 2.1. Microbial systems for in-situ soil and groundwater remediation; L. Diels, R. Lookman.- 2.2. Plant taxonomy for phytoremediation; S. Gawronski, H. Gawronska.- 2.3. Genetic variability and genetic engineering in phytoremediation; N. Marmiroli.- 3. Feasibility studies and practical implementation.- 3.1. Dechlorination of chlorinated hydrocarbons by zero-valent iron nano-particles; M. Pupeza et al.- 3.2. Remediation alternatives on high toxicity and dangerous sites; D. L. Russell.- 3.3. From laboratory experiments to large scale application - an example of the phytoremediation of radionuclides; P. Soudek et al.- 3.4. Phytoremediation - Some case studies conducted at WAU; S .Gawronski, H. Gawronska.- 3.5. Management of passive biological water treatment systems for mine effluents; C. Kunze et al.- 3.6. Lessons from the wastewater field; D. L. Russell.- 3.7. Phytoremediation of explosives; T.Vanek et al.- 4. Regulatory issues.- 4.1. German law for the prevention, identification, investigation, risk assessment and remediation of contaminated sites and harmful soil changes; W.-U. Marr.- 4.2. The main directions of cooperation between the Ministry of Natural Resources of the Russian Federation and CCMS NATO within the framework of NRC CCMS; A. L. Kozeltsev.-