Response to Information Request - Received on 19/04/2012 · OPW11/0335

4.0                RECEIVING WATER QUALITY


Water quality in the existing heath wetland was measured by Simmonds and Bristow on the 10th
July 2009, after rainfall and a stormwater flow event, to describe the existing physical-chemical
and          nutrient status of the                receiving           waters                 before the   proposed       Essence of            Peregian
development.    sample location map is shown in Appendix B. The existing water quality
                               A
parameters (Table 4-1) indicate that the water quality in the existing heath wetland was poor for
turbidity, suspended solids, total nitrogen and total phosphorus. Indicator concentrations that
exceed the guideline concentrations based on the level 2 environmental values associated with
the Noosa River: Environmental Values and Water Quality Objectives are highlighted in Table
4-1.


The Essence of Peregian Stormwater design will install water sensitive urban design features to
ensure that the quality of water entering the Noosa National Park is of better quality than that

currently discharged.

A map of the water quality sampling points has been included as Appendix F.


Table 4-1: Water Quality Measured in the Heath Wetland of the Existina Caravan Park Site

    Water Quality Indicator                                QWQG                     WS01          WS02     WS03         WS04        WS05          WS06

                                                          ,


                                                                                        250        290      470           200        180            230
    Conductivity        -
                            on site   (IlS / cm)
                                                           ,

    pH   -
             on site*                                      \5 7’-                        6.4       6.7      7.1           6.4        6.4            6.0


    Ammonia as N (mg/ L)                                      0~Q2                      0.050      0.25     0.22          0.13      0.054          0.046
                                                                    "’

                                                                         ..,
    Nitrate as N (mg/ L)                                       NA                       0.0’1      0.04     0.06          0.04       0.01          0.04
                                                                               ~
                                                                                   ’.


    Nitrate + Nitrite as N (mg/ L)                            0.06                      0.02       0.05     0.07          0.05       0.02          0.04
                                                                                        .
                                                                                        ,


    Nitrite as N (mg/L)                                        NA                       b.007     0.007    0.006         0.007      0.006          0.004


    Total Nitrogen as N (mg/L)                                ..0..5                     11        31        43           9.7’        11            0.7


    Total Phosphorus as P (mg/ L)                             0.05                       1.4       3.8      2.7           2.0         2.0          0.41


    Orthophosphate as P (mg/ L)                               0.02                      0.12       0.10     0.13          0.16       0.15          0.094


    Colour     -   True 0.45 11m (Pt-Co units)                 NA                       110        120      130           140        120            87


    Faecal Coliforms (CFU / 100 mL)                                                     160       16,200    1,120        1,800       720            <10


    Suspended Solids (mg/ L)                                    6                       720       2500      900          1000        1200           26


    Turbidity      -
                       Raw (NTU)                               50                       280        420      460           510        380            20


               Experts Conference Indicated that the low pH water quality objective IS SUitable on the baSIS of the
*
    JOint
wallum/tannin stained character of the receiving waters.
QWQG = Queensland Water Quality Guidelines.
Water quality indicators that exceed the environmental values have bold font and shaded background.




@2012 Simmonds & Bristow Pty LId                                    Contrast Constructions                                   J-1005-310   _
                                                                                                                                              22 March 2012
1:ICLlENTFILESIContrast Construdionsl1108-155c       -
                                                         Essence of Peregian SCEP Stage 1 Updatel09         _
                                                                                                                Output Documentsl11 08-155C SWMP
                                                                                                                                          _




SCEMP_Scanlon Property Group_V40_ta_120321.doc                                                                                                  Page 5 of 24