P-EA-100527093 - EA Permit - Noosa Shire Council - 20231108 (3)

                                                                                                                            Permit
                                                              Environmental authority P-EA-100527093

                    Water quality monitoring
                    Water quality monitoring must occur during dredging in accordance with Table 2 – Water
                    quality monitoring and trigger limits


                    Table 2 – Water quality monitoring and trigger limits
                                                                            Trigger:

                                                                     Limit                                             Minimum
                             Quality
                                                                                                                     monitoring
                          characteristic
                                                    20th            50th                  80th            Type       frequency**
                                                 percentile      percentile            percentile

                      pH (low flow)                  8.1             8.2                  8.3              %


                      pH (high flow)                 7.7             8.1                  8.2              %


                      Dissolved Oxygen               90              95                   105              %
                      (DO) (low/high flow)
                                                                                                                         Daily
       WT5            Turbidity (low flow)            1               2                    3              NTU       representative
                                                                                                                     sample when
                                                                                                                       dredging
                      Turbidity (high flow)           3               5                   11              NTU


                      Suspended solids                3               6                   11             mg/L
                      (low flow)

                      Suspended solids               15              15                   15             mg/L
                      (high flow)

                      Oil, grease, scum               Not visible or otherwise noticeable                 n/a
                      and litter
                    **Associated monitoring requirements
                        1. Monitoring must be conducted in accordance with the methods prescribed in the current
                            edition of the administering authority’s Monitoring and Sampling Manual 2009.
                        2. Water quality samples must be representative of water being tested.
                        3. All determinations must employ an analytical practical quantification limits of sufficient
                            sensitivity to enable reliable comparisons to be made against the assessment criteria relevant
                            to the particular water quality characteristic.
                        4. Monitoring must be undertaken during a release as per the frequency stated.
                        5. All monitoring devices must be correctly calibrated and maintained.


                    Dredging must cease while any of the trigger limits in Table 2 – Water quality monitoring
       WT6
                    and trigger limits are exceeded.

                    Marine Megafauna
     WT7.0          At all times during dredging, an appropriately qualified person must undertake monitoring
                    for the presence of marine megafauna.




Page 11 of 18 • ESR/2016/3415 • Version 3.00 • Last reviewed: 29 MAR 2023                       Department of Environment and Science