There is a document, the Westconnex New M5 Instrument of Approval which documents the conditions that the builders and operators of the New M5 must satisfy. It has all sorts of conditions in there and it's not just about air quality. I am quoting some particularly relevant parts here. Look out for the requirement to make improvements if the tunnel is a significant contributor to air quality goals not being met.
The air quality targets are based on an On the Australian air quality standard, backed by NSW legislation.
Prior to finalising the detailed design of the SSI and establishing the ambient air quality monitoring stations required under condition E10 the Proponent must establish an Air Quality Gommunity Consultative Committee (AQCCC) to provide input prior to and during the operation of the SSI. The AQCCC must:
|(a)||be comprised of -|
|(i)||two representatives from the Proponent and tunnel operator,|
|(ii)||one representative from each of the relevant councils, whose attendance is only required when considering matters relevant to their respective local government area,|
|(iii)||three representatives from the local community adjacent to the St Peters ventilation facility or three representatives from the local community adjacent to the Kingsgrove ventilation facility or three representatives adjacent to the Arncliffe ventilation facility whose attendance is only required when considering matters relevant to their respective local area, and whose appointment has been approved by an expression of interest process conducted by the Proponent in consultation with the Secretary, and|
|(iv)||a Chair who is an independent party put fonruard by the Proponent and approved by the Secretary;|
|(b)||meet at least four times a year, or as otherwise agreed by the chair and the Secretary;|
|(c)||review and provide advice on the location of the air quality monitoring stations required under condition E10, operation environmental management plans and other operation stage documents, compliance tracking reporting, audit reports, or complaints as they relate to air quality; and|
|(d)||provide advice on the dissemination of monitoring results and other information on air quality issues.|
The AQCCC must operate for up to two years after commencement of operation, or as otherwise approved or directed by the Secretary, in consultation with the Chair.
The Proponent must monitor (by sampling and obtaining results by analysis) the pollutants and parameters specified in Table 8 at the following locations as a minimum:
|(a)||two ground level receptors near the Kingsgrove ventilation outlet, at locations suitable for detecting any impact on air quality from the outlet;|
|(b)||two ground level receptors near the Arncliffe ventilation outlet, at locations suitable for detecting any impact on air quality from the outlet;|
|(c)||two ground level receptors near the St Peters ventilation outlet, at locations suitable for detecting any impact on air quality from the outlet;|
|(d)||one location within the vicinity of the St Peters lnterchange, as a location suitable for detecting any impact on air quality within the surrounding residential receptors; and|
|(e)||one location, away from any of the locations at (a) to (d), suitable for providing background ambient air quality reference data for the project area.|
The Proponent must commence monitoring for at least twelve continuous months prior to operation and continue monitoring for at least two years following the commencement of operation. At the conclusion of the two year operational monitoring period, the Proponent must review the need for the commencement of the continuation of the ambient monitoring stations in consultation with the AQCCC. Any recommendation to close any or all of the stations will require the approval of the Secretary in consultation with the EPA.
Should ambient monitoring of air pollutants exceed the following goals, the provisions of conditions E15, E16 and E17 will apply:
|(a)||CO - 8 hour rolling average of 9.0 ppm (NEPM);|
|(b)||NO2 - One hour average of 0.12 ppm (245 ps/m3)(NEPM);|
|(c)||PM10 - One hour average of 50 μg/m3 (NEPM);|
|(d)||PM2.5 - One hour average of 25 μg/m3 (NEPM);|
|(e)||PM10 - annual average of 25 μg/m3 (NEPM);|
|(f)||PM2.5 - annual average of 8 μg/m3 (NEPM).|
Within 20 working days of any Notification of Above-Goal Recording, the Proponent must prepare and submit to the Secretary a Report on Above-Goal Recording that details the cause and major contributor of the exceedance and the options available to prevent recurrence.
Where the operation of the tunnel is identified to be a significant contributor to the recorded above-goal reading, the Report on Above-Goal Recording must include consideration of improvements to the tunnel air quality management system so as to achieve compliance with the ambíent air quality goals, including but not limited to installation of the additional ventilation management facilities allowed for under condition 85, and discussion of whether those improvements are feasible and reasonable.
The Proponent must comply with any requirements arising from the Secretary's review of the Report on Above-Goal Recording.