About the Book
Table of Contents:
Summary, Foreword, Acknowledgements, List of figures, List of tables, List of boxes, Glossary, Abbreviations, 1 Introduction, 1.1 Background, 1.2 Legislative framework, 1.4 Methodology, 1.5 Audience, 1.6 Structure of the report, 2 Hazardous gases, 2.1 Introduction, 2.1 Common sources of hazardous gases, 2.3 Physical and chemical hazards, 2.4 Nature of hazards, 2.5 Factors influencing the generation of soil gases/vapours, 2.6 Factors influencing the migration and behaviour of gases/vapour, 2.7 Ingress into buildings, 2.8 Ingress into other structures, 2.9 Summary, 2.10 Further information, 3 Development of initial conceptual model and preliminary risk assessment site characterisation, 3.1 Overview of risk assessment, 3.2 Desk study, 3.3 Initial assessment of risks, 3.4 Summary, 3.5 Further information, 4 Methods of non-intrusive and intrusive investigation, 4.1 Setting the objectives of the ground investigation, 4.2 Investigation techniques, 4.3 Number and location of monitoring/sampling points, 4.4 Construction of monitoring/sampling points, 4.5 Summary, 5 Monitoring methodologies, 5.1 Types of instrumentation appropriate for monitoring 5.2 Selection process, 5.3 Monitoring methodologies 5.4 Flux box measurements, 5.5 Number, frequency and duration of monitoring, 5.6 Presentation of data, 5.7 Summary 6 Sampling methodologies, 6.1 Types of equipment appropriate for sampling and analysis, 6.2 Methodology, 6.3 Analytical techniques to identify the source of gas and hazardous properties, 6.4 Summary, 7 Interpretation of results, 7.1 Background, 7.2 Understanding the collected data, 7.3 Refining the conceptual model, 7.4 Additional phase II site investigation, 7.5 Summary, 8 Assessment of risk, 8.1 Introduction, 8.2 Risk assessment process, 8.3 Methane and carbon dioxide, 8.4 Assessing vapours from hydrocarbon contamination, 8.5 Considering protection in risk assessment, 8.6 Radon, 9 Remedial options, 9.1 Setting remedial objectives, 9.2 Philosophy for gas protection, basic concepts, 9.3 Passive and active systems of gas control (interpretation of the migration pathway), 9.4 details of systems available, 9.5 Monitoring and alarms in buildings, 9.6 Summary, 10 Post development monitoring, 10.1 Construction monitoring, 10.2 Existing guidance, 10.3 Future changes to the development and impact on soil gas regime, 10.4 Risk perception issues, 10.5 Practical aspects of the long-term verification monitoring, 10.6 Recommendations for post construction/post-remediation monitoring, 10.7 Verification/completion reporting, 11 Recommendations for research, 12 References, Appendices, Bibliography
