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

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               Total nitrogen exceeded Noosa Civic WQO's at all locations, however all fell
               below the median value of the reference site (SW3), indicating the elevated
               levels may represent natural fluctuations of the area.

               Total phosphorus exceeded Noosa Civic WQOs at SW5. However it should be
               noted that levels in the drainage lines leading to SW5 were below the WQOs,
               indicating Noosa Civic to be an unlikely source of the elevated levels.

               All other chemical parameter results were within defined water quality objectives.
               Refer to Table B2 in Appendix B for summary of results.

               2.3     Total Petroleum Hydrocarbons

               In November 2009, levels of hydrocarbons (C15-C28 fraction -160pg/L, and
               C29-C36 fraction - 50pg/L) were detected at SW4 (Dam), however the drainage
               lines leading in and out of the dam contained insufficient water to determine a
               source of the contamination.

               Results from testing in June 2010, indicated levels of hydrocarbons (C10-C14
               fraction - 70pg/L, and C15-C28 - 350pg/L) in SW2 (eastern drainage line) and
               SW3 (C15-C28 fraction - 160pg/L, and C29-C36 - 90pg/L) (paperbark wetland
               reference point, adjacent Eenie Creek). Hydrocarbons were not detected at


I              SW5, indicating the contamination from SW2 had not extended beyond the
               monitoring point. The drainage line leading to SW2, adjoins the access road
               leading into Noosa Civic. SW3 is independent, and located a significant distance
               from Noosa Civic, however may capture runoff from Walter Hay Drive.
               Hydrocarbons were not detected at any monitoring location during the August
               2010 event.

               Refer Table B3 in Appendix B for summary of results.

               2.4     Algae

               Varying levels of algae were detected at all monitoring locations throughout the
               sampling period. The highest levels were recorded at SW3 and SW5, both of which
               are located within the paperbark wetland. ANZECC water quality guidelines specify
               an upper limit of 15,000 cells/mL - 20,000 cells/mL for recreational use. As the highest
               reading of 17,500 cells/mL falls within this range and the areas are not utilised for
               recreation, we do not consider algae to be a cause for concern.

               Refer Table B4 in Appendix B for summary of results.

               2.5     Pesticides

               Pesticides were below laboratory limits of reporting for all sampling locations.

               Refer Table B2 in Appendix B for summary of results.


    3.0       GROUNDWATER QUALITY

    Groundwater quality monitoring is undertaken at the following two (2) locations:

          •    GW1 - Downstream of the dam on the western drainage line;
          •    GW2 - In a vacant allotment to the west of the site (allotment has been
               developed into an industrial subdivision, with roadway and kerb and channel
               during 2009).

    Refer to drawing DE0923/03 included in Appendix A for location of monitoring wells.

    AE0923WQM
    March 2011
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