Rejection of a seemingly good photo.

BTW: I suppose you have model releases for the workers, because in a perfect image, they would be recognizable. 

IMHO, looking on my iPad, I would guess, that there is, in addition to what @Jill_C says, also an exposure problem. 

The first image has leaning verticals, the focus is not sharp and there is chromatic aberration throughout. You also would have to edit out all the instances of the Tyvek logo, or get a property release from the company, in order to avoid an IP rejection. I do like the concept, though, of all the workers lined up one above the other on the scaffolding.

The second image appears to be just a vertical crop of the same file, so has the same errors.