2016-04-19 P&E Committee - Item 1, Attachment 2 - Air Quality Assessment Report

As petrol contains a higher volatile fraction, all emissions in this assessment have been assumed as
originating from a petrol source. The effect that this will have is a slightly conservative estimate of
the predicted impacts as petrol is considered more volatile than diesel.

The composition of petroleum fuel has been reported in the Emission Estimation Technique
Handbook for Aggregated Emissions from Service Stations (National Pollutant Inventory 1999) and
amended for Benzene based on the Fuel Standard (Petrol) Determination 2001 (Office of Legislative
Drafting and Publishing 2008) document as shown in Table 3.1.
Table 3.1: Composition of Petrol (NPI 1999)

                     Species                                                                   % Composition

                     Benzene                                                                           0.31350

                   Cyclohexane                                                                         0.07096

                   Ethylbenzene                                                                        0.08812

                     n-Hexane                                                                          1.92722

                      Styrene                                                                          0.00314

                      Toluene                                                                          1.20313

                      Xylenes                                                                          0.48236



The data presented in Table 3.1 is used in Section 3.4 in the calculation of emissions of individual
chemicals from the identified service station emission sources. Section 3.4 of this report considers
the emissions sources at the service stations. Modelling of emissions was completed as “petrol
vapour” then the fractions in Table 3.1 were applied to determine the individual constituents of the
vapours.

3.3.2      Odour Emissions
In order to estimate odour emissions from various activities at the service station, data has been
obtained from odour and VOC sampling completed at a service station. The study involved taking
simultaneous VOCs and odour samples from a fuel storage container containing unleaded petrol. The
samples were then analysed for total VOCs and odour concentrations for use in determining a
correlation factor. This correlation factor has then been applied to VOC emission factors for various
activities to derive odour emission rates. Odour sampling was completed in accordance with AS
4323.4:2009 Stationary source emissions – Area source sampling – Flux chamber technique and
AS 4323.3:2001 Station source emissions – Determination of odour concentration by dynamic
olfactometry.

Based on the sampling, a odour-to-Total VOC ratio of 439 (OU:g/m 3) was established. Total VOC
emission data was factored by 439 to establish odour emission data.


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                           Synergy Property Partners Pty Ltd- Air Quality Assessment - Proposed Service Station, 123 Eumundi-Noosa Road, Noosaville
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