Attachment B - Construction Methodology KANE

                                                                                      HOFFMAN DRIVE MEDICAL CENTRE
                                                                                     BASEMENT AND RETENTION WORKS



4.           CONSTRUCTION

4.1          RETENTION SYSTEMS
The proposed Basement Retention systems for this project are as outlined below and in Appendix B of this
document;

     -   Northern Boundary: Sheet Piling
     -   Eastern Boundary: Sheet Piling, with Contiguous/Secant piling to the Bunker enclosure
     -   Southern Boundary (adjacent neighbour) – Contiguous/Secant piling
     -   Northern Boundary (adjacent neighbour): Sheet Piling

Following site establishment, installation of Environmental controls and satisfaction of all ‘Prior to
Commencement’ tasks, works to strip and prepare the site for piling plant and equipment are to commence.
Pending final geotechnical advice, it is anticipated that this will involve importing a layer of suitable material to the
majority of the site area.

Retention works will commence at the South Eastern corner of the site with the installation of Contiguous/Secant
piling to the bunker enclosure to be completed prior to continuing along the Southern boundary for the balance of
the works.

Sheet piling activities to the balance of the site will be commence during this period, subject to final coordination
with vehicle access.


4.2          BULK EXCAVATION WORKS
Following completion of the relevant retention system installation and engineering approval, bulk excavation works
will commence. Key considerations in completion of the Bulk Excavation are as follows;

     -   During Bulk Excavation works, access is to be restricted to Vehicle Gate Access Gate 2
     -   Excavation works will again commence in the South Eastern corner of the site, with works to progress
         across the site, working towards Gate 2 and the temporary ramp
     -   Should rock anchors be required, hold points will be programmed in the Bulk Excavation programme to
         allow installation at appropriate centres. Where temporary anchors are required to extend under
         neighbouring properties, consent and investigations will be completed well in advance of the scheduled
         works onsite
     -   All vehicle movements during the Bulk excavation phase of the works, including Plant deliveries and
         Truck and Dog for material removal are to maintain a forward out, forward in approach at Vehicle Gate
         2
     -   Hold and release traffic management will be implemented as required to ensure safe exit and entry to
         site, while maintaining access and minimising disruption at the shared easement.

All material to be removed from site will be disposed of in accordance with the relevant Environmental and
legislative requirements.




CONSTRUCTION                                                                                                PAGE 9 OF 13