Steve, I have a few challenges here at the property caused by the floor crew. Alex has done everything she can to try and remove it and has been unsuccessful. My fear is that it is grout. I need your help with these items please. I'm not sure we should have people grouting the can't clean them up after themselves. While I know it is impossible for you to control this, we need to come up with a solution before we permanently damage things if we haven't already. Grout can cause such damage and in some cases is not reversible.
In front of the 41 E. mailroom, the pavers look really bad. Alex cannot get it any better. See photo.