Appendix F. Civil Engineering Report Part 2

ESSENTIAL PRECAUTIONS AND APPROACH DISTANCES

Note: If the following clearances cannot be maintained, please contact Optus Network Operations Asset
Analysis Team for advice on how to resolve the situation.

   1.   On receipt of plans and before commencing excavation work or similar activities near Optus plant, carefully
        locate the plant first to avoid damage. Engage an Optus accredited locator to undertake exposure of the
        Optus plant when working within the following approach distances.

Where Optus plant is in an area where road and footpaths are well defined by kerbs or other features a minimum
clear distance of 1.0m must be maintained from where it could be reasonably presumed that plant would reside.

In non established or unformed reserves this distance must be at least 3 metres.

In country or rural areas which may have wider variations in reasonably presumed plant presence, the following
minimum approach distance applies:

           a) Parallel to plant: 5 metres

Note: Indicated depths may vary significantly and pot-holing needs to be undertaken within extreme
care, common sense and using techniques least likely to damage cables. Potholing is only to be
undertaken by an Optus accredited plant location contractor.

If construction work is parallel to Optus plant, then careful hand digging or using non-destructive water jet method
(pot holing) at least every 5m is required to establish the location of the plant, confirming the location of the plant
prior to work commencing.

Under no circumstances is crossing of Optus plant to be performed without first exposing the Optus plant and having
an Optus representative present onsite.



   2.   Maintain the following minimum clearance between construction activity and the actual location of Optus
        plant.


Jackhammers / Pneumatic Breakers                            Not within 1.0m of actual location

Vibrating Plate or Wacker Packer Compactor                  Not within 0.5m of actual location

                                                            300mm compact clearance before compactor can be used
                                                            across Optus ducts

                                                            750mm compact clearance cover before compactor can
                                                            be used across Optus Direct Buried cable

Boring Equipment                                            Not within 5.0m of actual location without Optus
                                                            representative onsite
(in-line, horizontal and vertical)
                                                            Constructor to hand dig or non-destructive water jet
                                                            method (pot holing) and expose the Optus plant

                                                            Not to cross the Optus plant without first exposing the
                                                            plant at the crossing point and without Optus
                                                            representative onsite

Heavy vehicle Traffic (over 3 tonnes)                       Not to be driven across Optus ducts or plant with less
                                                            than 600mm of cover

                                                            Depth to be verified via hand digging

Mechanical Excavators, Farm ploughing, Boring,              Not within 1.0m of actual location
Tree removal, fencing
                                                            Constructor to hand dig or use non-destructive water jet
                                                            method (pot holing) and expose plant



Optus Communications                                                                                        Page 3 of 6