This page should be read in conjunction with How Plume Plotter Works. It provides more details specific to the Aberdeen version of Plume Plotter.
All of these are taken from [1]:
The following values are used for albedo, Bowen ratio, and roughness length. All of these except Bowen ratio are specified in [1]:
The emission rates of pollutants are taken from [1]. These are:
| Pollutant | Emission rate per second |
|---|---|
| Oxides of nitrogen | 3.98 g |
| Particulates PM10 | 280 mg |
| VOCs | 280 mg |
| Hydrogen chloride | 280 mg |
| Hydrogen flouride | 28 mg |
| Carbon monoxide | 1.42 g |
| Sulphur dioxide | 1.42 g |
| Ammonia | 280 mg |
| Mercury | 1.42 mg |
| Cadmium and thallium | 1.42 mg |
| Other metals | 14.2 mg |
| Dioxins and furans | 2.84 ng |
| PAHs | 3.4 μg |
The background levels of pollutants are taken from [1]. For some pollutants, the source document provides several readings, in which case we have used the average of them. The values we use are:
| Pollutant | Background concentration per m3 |
|---|---|
| Oxides of nitrogen | 39 μg |
| Particulates PM10 | 22.5 μg |
| VOCs | N/A |
| Hydrogen chloride | 310 ng |
| Hydrogen flouride | N/A |
| Carbon monoxide | 280 μg |
| Sulphur dioxide | 2.58 μg |
| Ammonia | 650 ng |
| Mercury | 1.2 ng |
| Cadmium and thallium | 90 pg |
| Other metals | 17.12 ng |
| Dioxins and furans | 48.7 fg |
| PAHs | 100 pg |
Weather data is taken from METAR reports from a local airport: Aberdeen.
Upper air data is the latest reported by the Albemarle upper air station.
1. East Tullos Energy from Waste - Environmental Statement Appendix 11.A - Technical Methodology Report of Point Source Emissions to Air, Amec Foster Wheeler Environment & Infrastructure UK Limited, February 2016. There is no direct link! Search for planning application #160276 and select document named "Environmental Statement - Vol 3 / Appdx 11.A -11.B"