ESD says next time noisy generators near residences will use noise attenuating blankets (but why didn't they do so originally?)

So, was there any response to the Atlantic Yards Watch posting that explained how noisy generators at Pacific Street and Carlton Avenue were annoying neighbors.

I quered Arana Hankin, Director, Atlantic Yards Project, for Empire State Development, who responded:

The contractor will not be using the generator again in this area in the near future. The generator was placed on the street because there was no space in the yard where the generator could have been placed to do the necessary work on the south abutment of the bridge. If there is a need to use the generator in this area again, the contactor will be required to use noise attenuating blankets.

That doesn't quite answer why the contractor didn't use such noise attenuating devices the first time.