Noise exemption - LRT between Tunney's/Merton

I am heading out mid-day today to hand-drop a notification to residents of some upcoming night work. Here is the letter I'm distributing:

Dear resident,

I have recently concurred with a noise exemption to work at night on the light rail site between Tunney’s Pasture and Merton Street inside the Transitway trench.

The work would consist of concrete chipping that can’t be done during the day while other work crews are sharing the space. I have agreed to allow the work from September 21 until October 5. The work will shift as they get various portions of the trench done, moving at about 60-90 meters per night. The noise level has been described to me as around 70-80 db at the source. Given that the work will be inside the trench and at a reasonably significant distance from the adjacent houses, I’m comfortable that this won’t be a prolonged or overly disruptive period.

I have put conditions on the exemption including that there will be no backup beepers, or light sources that affect the homes next to the trench.

I apologize for the short notice. The request was only made to me last week. I have let the project team know that we need much more notice so that I can in future consult fully with residents. They are aware that if the noise level is wholly unacceptable, that this will jeopardize future exemptions.

Thanks for your understanding and my apologies for the disruption.