3. Noosa Project Restoration Plan V12

                 recruitment in the estuary. This period        Winter deployment considered
                 falls over the summer months.                  possible but the risk of the substrate
                                                                being covered with algae and non-
                 Sediment plumes associated with the            habitat forming species is assessed as
                 works will be as per the protocol outlined     high and not desirable.
                 in Section 6.4: Sediment management


6.4 Sediment management

Sediment plumes associated with restoration works may impact on seagrass and are principally caused
by using substrates (rock /shell) fouled with loose organic and inorganic matter collected by the
substrate in its acquisition from the quarry, during storage at the load oust site, or during handling and
deployment onto the barge. The resuspension of river sediments caused by the placement of the rock
on site may also be an issue but would be temporary and may be insignificant in comparison to the
generally very high background suspended sediment load of the estuary.

The construction contractor will be required to implement the following sediment plume minimisation
protocol and must incorporate this into the Construction and Environmental Management Plan (CEMP).

The protocol includes the following:

    o   Preferential selection of rock from the quarry with minimum fracking (if possible).
    o   Organising the transport of rock to minimise contamination from lose material.
    o   Washing the rock prior to use, preferably at the quarry, if the rock is contaminated with loose
        material is greater than 50% by area.
    o   Managing the rock at the load out site to minimise significant fouling by ground sediments, if
        detected. This may include measures such as laying a bed of gravel on which the rock sits at
        the load out site, loading rock directly from the truck onto the barge, minimising the movement
        of barge equipment on and off the barge to avoid contamination from the tracks of the
        equipment.
    o   Washing oyster shells prior to mixing this into a composite substrate with rock. Washing will
        occur at the Doonan Solid Waste Facility.
    o   Deploying the rock on site by placing it on site carefully, rather than dumping it off the side of
        the barge, if plumes are caused.
    o   Inspection and physical marking of the seagrasses in closest proximity to the site is to be
        undertaken prior to commencement of works. During works visual monitoring of the sediment
        plume is to be undertaken. Where the visible plume extends to within 5m of seagrass beds,
        turbidity monitoring is to be undertaken.
    o   The extent and duration of the anticipated sediment plume is such that mangrove species are
        unlikely to be impacted and do not require monitoring unless significant sediment plumes are
        observed.

        If seagrass remains at risk of sediment smothering (if turbidity monitoring indicates turbidity
        (NTU) is more than 10% above background), then employ a combination of the following:

    o   Deployment of silt curtains around the seagrass beds, or in close proximity to the restoration
        site and/or,

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