Noise and Air Quality Impact Assessment W D Milligan 31 July 2014

                                                                   MWA Environmental




   4.3.5 AMBIENT DUST CONCENTRATIONS

   Available ambient air quality monitoring from the Queensland Department of
   Environment and Heritage Protection (EHP) is contained in Ambient Air Quality in
   Queensland 2010 Annual Summary and Trend Report. A summary of the
   ambient dust data applied to this assessment is provided in Table 10 below.

   Table 10: Ambient Dust Data Applied to Assessment

               AVERAGING
POLLUTANT                       AMBIENT                        SOURCE
                  TIME

                   Annual                      Conservative assumption of double Mountain
    TSP                         25.2 µg/m3
                   Average                       Creek Year 2010 PM10 annual average

                   24 Hour                      75th percentile Mountain Creek Year 2010
    PM10                        15.4 µg/m3
                   Average                                PM10 24 hour average

                   24 Hour                          75th percentile Rocklea Year 2010
   PM2.5                         6.7 µg/m3
                   Average                                PM2.5 24 hour average

                   Annual
   PM2.5                         5.5 µg/m3      Rocklea Year 2010 PM2.5 annual average
                   Average

   DUST
                      -        40 mg/m2/day             Conservative assumption
DEPOSITION



  The ambient dust data applied to the assessment are considered to be
  conservative given that the monitoring stations are located in areas in proximity to
  higher densities of transportation and industry than is present adjacent to the
  subject site.



4.4 DUST MODELLING RESULTS

The model-predicted dust concentrations and deposition rates at the surrounding
residences (R1 to R28, refer Figure 3) are summarised in Table 11 below.

The results of the dust modelling are included in Attachment 9 as plots of the model-
predicted particulate concentrations and deposition rates over the model domain.




Ridgewood 12-002                         24                               31 July 2014