| | Environmental Monitoring Strategy – Ambient Air |
| | 1,71 | | MB |
| | 44 | | stron |
| | 6574 | | ID | Environment Agency |
| | 2000 | | rok |
| | Contents 17 |
| | Introduction . 1 |
| | General aspects of ambient air quality monitoring . 1 |
| | The need for a monitoring strategy. 2 |
| | Survey objectives and monitoring strategy . 3 |
| | Survey objectives and monitoring strategy . 3 |
| | Review of existing information 5 |
| | Existing monitoring data and ancillary information . 5 |
| | UK automatic monitoring networks . 5 |
| | UK non-automatic monitoring networks 5 |
| | Environment Agency episode protocol . 5 |
| | UK review groups . 7 |
| | Targeting the pollutant 8 |
| | Different Phases . 8 |
| | Total and speciated measurements 8 |
| | Further chemical or physical characterisation 8 |
| | Media other than air 8 |
| | Which species to measure. 8 |
| | When to sample, how long to sample for, and how many samples to take. 9 |
| | General considerations . 9 |
| | Continuous or intermittent sampling . 9 |
| | The averaging period 9 |
| | Duration of the sampling programme . 11 |
| | How to measure 12 |
| | Sampling approach . 12 |
| | Choice of measuring method 12 |
| | Meteorological data 17 |
| | Other information 17 |
| | Accompanying measurements and supplementary data. 17 |
| | Where to sample . 18 |
| | General guidelines 18 |
| | Sampling site requirements 18 |
| | Site location guidelines . 19 |
| | General location guidelines 19 |
| | Topographical considerations . 19 |
| | Number of sampling locations 19 |
| | Pilot surveys . 19 |
| | Site location guidelines for particular objectives . 20 |
| | Controlled emissions from elevated sources 20 |
| | Fugitive emissions 20 |
| | Controlled and fugitive emissions . 20 |
| | Assessment of the impact of an individual emission source. 21 |
| | Monitoring for verification of dispersion models 22 |
| | Monitoring to establish frequency of peak levels from discrete sources 22 |
| | Monitoring within area sources . 23 |
| | Assessment of health risks . 23 |
| | Data handling 24 |
| | Analysis of results and reporting 25 |
| | Presenting the raw data 25 |
| | Summarising data . 25 |
| | Frequency distributions. 26 |
| | Measures of central tendency. 27 |
| | Geographical summaries 28 |
| | Time-series plots 29 |
| | Use of meteorological data . 30 |
| | Interpretation of data. 31 |
| | Characterisation of episodes 31 |
| | Report content and structure 31 |
| | Quality control and quality assurance 32 |
| | Quality control . 32 |
| | Quality assurance . 32 |
| | References. 33 |
| | Appendix A: List of abbreviations. 34 |
| | Appendix B: Computer dispersion modelling 35 |
| | B1 Use of dispersion models in design of monitoring programmes 35 |
| | B2 Basic description of dispersion models . 35 |
| | B3 Effects of buildings and topography 35 |
| | B4 Specific model applications . 36 |
| | B5 Accuracy of dispersion models and guidance on their use 37 |
| | B6 References 38 |