Dear Khun Weerasak/Khun Jakkrit
As we agreed yesterday ,no need to use blue sheet for contractor that do corridor walk way ceiling work.So please make sure they have good clear and cleaning after they sandpaper the ceiling.It effect to other people that walk pass and step on ,then make white foot print on floor tiles along corridor. Please clearly and aware on this and they should have foreman to look after every period and monitor by MTR( The worker not listen to me) . Especially end of period or end of shift every day.