220711 Noosa Oyster Project - CEMP

              5.     Existing Environment
            The areas of the Noosa River that the restoration sites are located naturally have a high mount of
            turbidity and after storm events the turbidity would be higher. The department of environment and
            resource management QLD has recorded the average turbidity of the lower Noosa river between 1
            and 4 NTU and the upper estuary averaging up to 20 NTU. The High turbidity that comes with
            storms and flood events are considered natural phenomena and species within the local marine
            environment are able to tolerate these conditions for short periods. We don’t expect the Plumes
            created from reef construction to impact the environment as much as one of these natural events.

            6.     Monitoring Process
     Monitoring                          Frequency                              Responsibility

     Visual inspeciton                    Before commencement of works,         M&J Marine
                                          daily whilst marking out individual
                                          patches
     Aerial Photography                   Before commencement of works          M&J Marine
                                          After rst load in each area
                                          Weekly if impacts appear to be
                                          low
     Site Photographs                     Before and after each site is         M&J Marine
                                          complete - on low tide.


                    6.1. Protective measures
                    Our first step in protecting the local environment is to identify and and clearly mark all
                    sensitive habitats. Once marked we will ensure that the vessels propellors as much as
                    practical do not transit over these areas, when this is not practical we will ensure that engines
                    are trimmed up as much as possible and also, as much as possible, drift over these areas in
                    neutral if there is not practical alternate route.

                    Once on site and building if large plumes are detected and seen to be travelling towards or
                    over sensitive areas such as sea grass then a floating silt boom will be deployed to prevent
                    the plumes from impacting the environment.

                    If the plumes are minor and are not impacting the sensitive areas the silt booms will not be
                    used as dragging of the weights and curtains can potentially be more harmful to the
                    immediate environment than the sediment plumes that they are catching.

                    In addition to plume monitoring and control we are also using a very clean rock supply with
                    minimal sediment within the load and we are placing conveyor belt rubber under the stock
                    piles to minimise / eliminate picking up sediment from the natural ground under the stock
                    piles, this method has been proven to reduce the amount of unintended material being picked
                    up by 90 - 100%.

            7.     Record keeping and reporting
            M&J Marine will keep all photos, both aerial and onsite, for a minimum of 12 moths from project
            completion. They will be given to the principal (TNC) at the end of the job or as required on request.
            In the event that the use of a silt boom on the build sites is triggered the principal will be notified
            immediately and the success of this management strategy will be reported on daily.
            In the unlikely event it is found to be ineffective other methods will be considered including the use
            of a second curtain however based on experience we don’t expect this to be the outcome.




     ABN: 766 242 991 45                                Page 5                       [email protected]
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