2022-12-15 Ordinary Meeting Minutes

ORDINARY MEETING MINUTES   15 DECEMBER 2022




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ORDINARY MEETING MINUTES                                                                         15 DECEMBER 2022

               9.2.1 Wallum tannin-stained freshwater

                  Cc      Castaways Ck, downstream of David Low Way footbridge casso00
                          (63 samples, 2new)
                 Waterwatch
                  Grade
                          Turbidity (NT) rs
                           Tero (135;
                               pH (4.25)
                           Ec (235uS/cm)
                            DO (42%sat) i
                                        0                      50                     100
                                               Compliance (%of samples)
                   e   Wallum tannin-stained freshwater water type used (as mapped by DES), however the
                       “Eastern sandplain water type” from the Mary Catchment may be more suitable due to pH
                       values recorded;
                   e   pHcompliance is low, however the recorded range is 3.7 to 5.1 which indicates a naturally
                       acidic water type closer to the “Eastern sandplain water type”;
                   e   Monitoring commenced in 2010, good sample size;
                   e   Excellent turbidity and electrical conductivity compliance;
                   e   Dissolved oxygen is non-compliant, with median value of 42% saturation, with overall low %
                       saturation (21 - 112%) which indicates a water quality issue potentially from stormwater
                       runoff.

                  C                     Burgess Ck under David Low Way          BUR850
                                        (66 samples, 4new)
                 Waterwatch
                  Grade
                          Turbidity (1NTU) -
                           Temp (21.2)
                                  7.)
                           EC (833uS/cm)- J
                            Do (43%sat)+
                                        0                     50                      100
                                               Compliance (%of samples)
                   e   Wallum tannin-stained freshwater water type;
                   e   Monitoring commenced in 2010, good sample size;
                   e   Excellent turbidity compliance, although compliance declined since 2017;
                   e   Dissolved oxygen is non-compliant, with median value of 43% saturation, with overall low %
                       saturation (9 - 94%) which indicates a water quality issue potentially from stormwater
                       runoff;
                   e   pHcompliance is low, the recorded range is 5.9 to 7.8;
                   e   ECcompliance is low due to majority of results >500uS/cm. The EC level is high for Noosa
                       Catchment waterways. Compliance also declined since 2017.

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