2021-12-07 Planning & Environment Committee Meeting Agenda - Updated

PLANNING & ENVIRONMENT COMMITTEE MEETING AGENDA                                    7 DECEMBER 2021


Water               Constituent             Original WQ Data to   Proposed               Comment
                                            2004                  Objectives
                                            20,50,80 %iles        20,50,80 %iles
                    2010          WQO’s
                    (8,12,22)                                                            Because turbidity in this section of the Lake has already been
                                                                                         attributed to the resuspension of sediments that have
                                                                                         historically washed into Lake Cootharaba, and it is infeasible to
                                                                                         manage, recommend maintaining the 2004 quality here.

                                                                                         *This could have implications on our report card score –
                                                                                         because we know the current situation is worse than 2004
                                                                                         measurements, but at least it is truthful of the protectory of the
                                                                                         situation – and could provide greater drive for supporting ESC
                                                                                         management in the rural areas where report card scores reveal
                                                                                         the issue here.
                    Total   Suspended       na                    3, 10, 30              While it is practical and relevant for reasons outlined for
                    Solids                                        5,15,40                Turbidity- 40 is quite close to the construction site release limit
                    (7,14,25)                                                            of 40 which also is an undesirable perception. To substitute
                                                                                         2004 data, it could be useful to make a correlation of TSS
                                                                                         against Turbidity for these waters – and scale back to expected
                                                                                         TSS relative to Turbidity for the 2004 turbidity/TSS
                                                                                         measurements – and then is the scales TSS in 2004 is lower
                                                                                         than 40 please use that.
Lake Cootharaba     Total     Suspended     Low: 3, 9, 29         Low:3, 9, 30           The 80th %iles are facilitating a creep in the upper limits.
Section 2           Solids                  High:6,13,43          High:6, 13, 45         Recommend for 2004 values to be applied here for same
                    (7, 14, 25)                                                          reason as Section 1 Turbidity comment.
Teewah     Creek,    Total Nitrogen         Low: 314, 400, 630    Low:160, 220, 320      Improvement of the situation and can be supported. The
Upper      Noosa    (Low Flow upper         High: 368, 630, 734   High:300, 360, 470     provision of 50th%iles will offset the minor increase upper limit
River,       and    limit 300)
Northern Noosa      Ammonia                 Low: 5, 22, 49        Low:6, 8, 15           While 80th %ile for low flows exceed the 2010 limit, the overall
                    (Low Flow upper         High:17, 56, 120      High:5, 16, 18         objectives seek an improvement compared to 2004 situation
                    limit 10)                                                            and can be supported.
Kin   Creek     /   Oxidised Nitrogen –                                                  Not applicable. The spread sheet proposes median values well
Cootharaba          please confirm the                                                   below 60 ug/L and 2010 limits.
                    dataset this was
                    sourced from has a
                    median       oxidised
                    nitrogen value of 60
                    ug/L.


                                                                                     Page 121 of 140