A note from HS2:
Please see Information Paper E31, which outlines the commitments HS2 has given to manage the potential impacts of the scheme on air quality. Air quality is being monitored along the line of route. This will include monitoring nitrogen dioxide around highways used by construction traffic and construction dust around areas of construction works. Both of these types of monitoring will be undertaken in the LB Hillingdon. We are currently in discussion with Hillingdon Council to agree locations.
Further details on HS2’s commitments to data sharing are given in section 4.3 of the Code of Construction Practice