Water Quality Monitoring Report - Noosa Civic - November 2009-2010 - Eenie Creek Rd NOOSAVILLE · 132002.220285

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                 testing be utilised to determine if further investigation is required, or if this was an
                 isolated event.

                 Refer to Table B6 in Appendix B for summary of results.

                 3.4     Total Petroleum Hydrocarbons

                 All results were below laboratory limits of reporting. Refer to Table B7 included in
                 Appendix B for summary of results.


1     4.0       BIORETENTION SYSTEM MONITORING

      In accordance with commissioning, the bioretention basins were tested once only,
      following a significant rainfall event. Sampling was undertaken at the following locations,
      based on information contained within MBT WBM OSWMP - Addendum Report, which
      indicated that only these locations provide access and unmixed water:

            •    BR1/2A;
            •    BR 1 /213; and
            •    BR1/3A;



I     Sampling was not undertaken at BR1/3B, due to water flow not observed from the outlet.
      The issue was reported to Noosa Civic Management and we understand that
      maintenance was undertaken. Refer to Table B8 in Appendix B for summary of results.
      Permeability testing and soil contamination testing are not required until the end of year
      5. Photographic survey was not within the scope of this commissioning.
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      5.0       ROOF WATER REUSE SYSTEM

      The roof water collection tanks were inspected on a quarterly basis. Refer to Drawing
      DE0923/03 for location of inspection points.

      Observations are summarised in Table B9 in Appendix B.

      The presence of mosquito and cane toad larvae was not detected during inspections. Sludge
      within the tanks was immeasurable. A small quantity of floating litter was observed during the
      inspection in November 2009 and February 2010. Advice received from Noosa Civic

I     Management indicated that the tanks had been leaned out prior to the inspection in
      September 2010. The concrete bottom of the tank was clearty visible during this inspection,
      with only a very minor amount of leaf litter observed within the tank.


      6.0       DISCUSSION

      As a result of the significant increase of developed land in the vicinity of the Noosa Civic,
      we consider that the monitoring points specified under the OSMP may no longer be
      indicative of runoff quality independent to the complex.

      As such, we consider a review of monitoring locations and WQOs should be undertaken.
      The area surrounding the site is now largely developed with additional roads, and
      several of the monitoring locations have catchments which are no longer exclusive to
      Noosa Civic.

      In addition we consider dissolved oxygen parameters designed for flowing waters are
      generally not applicable in this instance and should be amended in line with median
      values obtained over the last 12 months of monitoring.



      AE0923WQM
      March 2011
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