The approval should be…

The approval should be subject to the NPC-300 noise guideline.
Also the NPC 300 does not measure lower frequency noise properly from sources such as diesel equipment, trains, trucks etc. The noise from these sources can travel many km, can cause hi levels of annoyance, loss of sleep and have adverse effects on quality of life and health. The health study must be done at least within a 5km radius of all sources of noise.
I live within this 5 km radius and the noise from the trains will keep me awake at night and are very disturbing. The noise penetrates all forms of noise mitigation measures such as ear plugs and white noise machines.
It is not possible to mitigate this noise at the point of contact, so this must be done at the source.
Immediate measures must be implemented to reduce nighttime noise.

A health study must be done to determine the adverse effects from noise from all of vales operations in the city of Sudbury, including the vale copper cliff complex and associated train and truck routes. With a particular attention to the 30 to 1000 hz range. The LEQA method (which the NPC 300 uses) is not sufficient to determine the level of these lower level noises. The LEQC method should be used.

https://www.ceaa.gc.ca/050/documents/p80054/119378E.pdf

The immediate noise mitigation measures and detailed study must be part of the ECA.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3896847/

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4486117/

https://www.researchgate.net/publication/267636548_ROAD_AND_RAILWAY_TRA…