More information on Ventilation Outlets in the Coordinator-Generals Conditions Appendix 1
Schedule 1 at 4. Making a Material Change of Use for ERA 51 - road tunnel ventiliation stack operation.
(a) Prior to the commencement of operation of the environmentally relevant activity (ERA), prepare and implement an Operational Air Quality Environmental Management Plan to mitigate and manage the potential impacts on air quality arising from the operation of the tunnel ventilation system.
(b) The ventilation system must be designed so that it does not prevent the possible future installation of filtration equipment to remove small particles and possibly oxides of nitrogen from vitiated air before it is released to the ambient environment during tunnel operation.
(c) The western ventilation outlet for the project is to be situated adjacent to the Centenary Motorway at the location indicated in the EIS1, and must be at least 20 metres in height above natural ground level in that location, or no less than RL 67metres, whichever is the higher.
Take the below link:
http://www.deedi.qld.gov.au/cg/resources/project/northern-link-tunnel/nlrt-cg-report-appendix-01.pdf
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