Development Application Part 2 - Environmental & Stormwater Management Plans · OPW11/0335

9.         MONITORING AND EVALUATION OF WATER QUALITY AGAINST TARGETS

A draft water quality monitoring program has been developed to measure the performance of
the proposed stormwater treatment train against targets (Table 1).      The objective of the
monitoring program is to quantitatively show whether or not the nominated water quality targets
are being met.

The key water quality indicators are total suspended solids, total nitrogen, total phosphorus and
pH (Table 1). Other relevant water quality parameters include microbiological parameters
(faecal coliforms, Escherichia colt), chemical and physical parameters (dissolved oxygen,
turbidity), and herbicides if they are used within the development site.      The following water
quality indicators are recommended (Table 10):

           • Microbiological: Faecal coliforms, Escherichia coli
           • Physical: Biological Oxygen demand, dissolved oxygen, suspended solids, turbidity,
             pH;
           • Chemical: Total suspended solids, total nitrogen, total phosphorus; and
           • Herbicides: If herbicides are used to control weeds on the development site, then
             they should be included in the suite of water quality indicators.

                          Table 10: Summary of Test Methods for Ambient Surface Waters
                                 S&B
                               Internal
                                                    Sample Preparation
      Parameter                  Test                                                             Sample Analysis Method
                                                         Method
                               Method
                               Number
                               WC250 &
 Nutrients - total                             Heated persulphate digestion              SEAL A02 discrete analyser
                               WC270

 E coli                        WB302           Membrane filtration                       EC Broth or EC-MUG medium
 Faecal coliforms              WB302           Membrane filtration                       M-FC Agar
 BOD5                          WC265           Incubation                                Membrane electrode in Wheaton Bottles
 Suspended solids              WP100           Membrane filtration                       Gravimetric
 Dissolved oxygen              F260            None                                      Membrane electrode
 pH                            F090            None                                      Membrane electrode
 Turbidity                     F170.1          None                                      Photometer

 Herbicides                    00022           Solvent extraction                        #GC/MS

#GCMS - Gas Chromotograph/Mass Spectrometer


It is recommended that the water quality of the terminal wetland is represented by four (4)
sampling points per sampling event (i.e. 4 spatial replicates): two (2) from the Constructed
Wetland System and two (2) more from the heath on the west of the terminal wetland (adjacent
to Noosa National Park). The recommended sample points are indicated in Table 11, which
lists the location of sample points during the construction phase and the operational phase.

Monitoring needs to commence during the construction phase, and continue during the
operational phase.




02011 Simmonds & Bristow Ply Ltd             Pacific Plumbing - Scanlon Property Group Pty Ltd                    J-1109-155 - 8 September 2011
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