APPROVED Document - Concept Construction Management Plan · OPW11/0116

 

Figure 8:Existing path to site

Arborists have advised that the following methodology would be most beneficial and is to be followed as much as

practicable:
« Removal of branches >6" diameter and placement within Noosa Spit and Noosa Woods (above HAT) as fauna
habitat

¢ — Heavy trimming of remaining trees, stockpiling and mulching. Mulch to be utilised for rehabilitation along access
track and site perimeter
e Removal of remainder of tree litter unsuitable for mulching for disposal at an appropriate location ashore

Removal of trees and mulching to be undertaken by separate, experienced contractors prior to commencement of other
works

 

An offset programme has been developed to compensate for the loss of habitat as a result of the works and this is provided
as a separate report.

6.4 Acid Sulphate

Sediment testing was undertaken on 4" and 5% January 2011 by Coffey Geotechnics. The sediment is fine-medium grained
sand with low (<5%) fines content

While the surface sediments are clean sand suitable for nourishment, acid sulphate soils (both AASS and PASS) were
identified within some of the deeper areas. Below is the table from the Coffey Report

The dredging for interim navigation and excavation for the construction of the submerged closure does not disturb acid
sulphate soils.

Dredging / excavation for the wall and training wall / groyne at the end of Noosa River Spit does disturb some acid sulphates
below RL-4.75m AHD. As such, all material dredged / excavated from below RL-4.5m AHD is to be placed below LAT (i.e
used for filling deeper containers or as backfill adjacent to the toe).