This page should be read in conjunction with How Plume Plotter Works. It provides more details specific to the Poolbeg version of Plume Plotter.
Building measurements are taken from the building plans included in the EIS [1]. There are two stacks but they have been combined into one because of the short distance between them (~5m).
This image shows the layout of the stack and buildings modelled. (North is at the top; numbers indicate the height of stacks and buildings; lighter shades of pink are used for higher buildings.)
All of these are taken from [1] [2] [3] except the stack location which is not stated but was calculated from aerial photographs:
The following values are used for albedo, Bowen ratio and roughness length. The roughness length is set to a low value because of the source of wind data used. (For historical plots and animations, a roughness length of 0.5m was used, as specified in [3]).
The planned emission rates of pollutants are taken from [1] [2] [3]. These are:
| Pollutant | Emission rate per second |
|---|---|
| Oxides of nitrogen | 23.89 g |
| Particulates | 663.6 mg |
| Sulphur dioxide | 5.309 g |
| TOC | 663.6 mg |
| Carbon monoxide | 3.982 g |
| Hydrogen chloride | 1.062 g |
| Hydrogen flouride | 106.2 mg |
| Cadmium and thallium | 6.636 mg |
| Mercury | 2.655 mg |
| Other metals | 53.09 mg |
| Dioxins and furans | 6.636 ng |
The actual emission rates use the same flow rates as above, conmbined with the concentrations measured in May 2022, as reported in the incinerator's report submitted to the EPA. They are listed below:
| Pollutant | Emission rate per second |
|---|---|
| Oxides of nitrogen | 25.29 g |
| Particulates | 64.5 mg |
| Sulphur dioxide | 366.3 mg |
| TOC | 39.1 mg |
| Carbon monoxide | 902.8 mg |
| Hydrogen chloride | 4.625 mg |
| Hydrogen flouride | 18 mg |
| Cadmium and thallium | 88.9 μg |
| Mercury | 33.3 μg |
| Other metals | 1.122 mg |
| Dioxins and furans | 0 |
The background levels of pollutants are taken from [1] [2] [3]. These are:
| Pollutant | Background concentration per m3 |
|---|---|
| Oxides of nitrogen | 27.6 μg |
| Particulates | 30 μg |
| Sulphur dioxide | 14 μg |
| TOC | 1.7 μg |
| Carbon monoxide | 510 μg |
| Hydrogen chloride | 240 ng |
| Hydrogen flouride | 10 ng |
| Cadmium and thallium | 1 ng |
| Mercury | 1 ng |
| Other metals | 10 ng |
| Dioxins and furans | 56 fg |
Weather data is taken from METAR reports from a local airport: Dublin.
Upper air data is the latest reported by the Castor Bay upper air station.