MCU15/0095 Air Quality Assessment Report

                                                                     Ambient Pollutant
      Compound              Averaging Period                                                                    Monitoring Station
                                                                      Concentration

                            70th percentile, 24-hr                             43.8 ug/m3
      Total Xylenes                                                                                                       Springwood
                          Maximum Annual Average                               26.8 ug/m3




4.6        Emission Data
The source emission input data entered into the model is as per the emission estimate data
presented in Table 3.5. To determine speciated concentrations, the fuel composition data presented
in Table 3.6 has been adopted.


4.7        Downwash Structures
Based on a review of the modelled stack heights and surrounding area, one building has been
considered as a downwash structure. Buildings which are greater than stack heights divided by a
factor of 2.5, and within a radius of 5 times the lesser of the building height or projected building
width have been considered. Figure 4.1 presents the modelled downwash considered in the
assessment.




                                                                                                                                           Page 21 of 30
                           Synergy Property Partners Pty Ltd- Air Quality Assessment - Proposed Service Station, 123 Eumundi-Noosa Road, Noosaville
                                                                                                       /Network/Projects/4484/Reporting/4484 Report03.odt