Details of Preston Plume Plotter

This page should be read in conjunction with How Plume Plotter Works. It provides more details specific to the Preston version of Plume Plotter.

Stacks and buildings

Building measurements are taken from [2].

The image below shows the layout of the stack and building modelled. North is at the top; colours and numbers indicate the height of the buildings and the stack:

Stack measurements

These are taken from [2]. Note that the two flues are combined into a single larger stack here:

The following values are used for albedo, Bowen ratio and roughness length. Roughness length is as specified in [2]:


The emission rates of pollutants are taken from [2]:

PollutantEmission rate
per second
Oxides of nitrogen10.57 g
Sulphur dioxide2.64 g
Carbon monoxide4.4 g
Particulates440 mg
Hydrogen chloride530 mg
VOCs880 mg
Hydrogen flouride90 mg
Ammonia880 mg
Cadmium and thallium2 mg
Mercury2 mg
Other metals30 mg
PAHs9.25 μg
Dioxins and furans5.28 ng
PCBs440 μg

Background levels

The background levels of pollutants are taken from [1]:

concentration per m3
Oxides of nitrogen26.19 μg
Sulphur dioxide4.45 μg
Carbon monoxide392 μg
Particulates14.58 μg
Hydrogen chloride710 ng
VOCs1.07 μg
Hydrogen flouride2.35 μg
Ammonia4.13 μg
Cadmium and thallium830 pg
Mercury20.1 ng
Other metals95.13 ng
PAHs490 pg
Dioxins and furans33 fg
PCBs127.5 pg

Weather data

Weather data is taken from METAR reports from a local airport: Blackpool.

Upper air data is the latest reported by the Nottingham upper air station.


1. Longridge Road Energy Centre - ENVIRONMENTAL STATEMENT: Appendix 13.1 Baseline Analysis, Fichtner. May 2019.

2. Longridge Road Energy Centre - ENVIRONMENTAL STATEMENT: Appendix 13.3: Emissions Modelling, Fichtner. May 2019.