A man dressed in a light blue shirt dumping items from a bin into another bin, while standing in a room full of food donations.
A man dumping items from a bin to another bin to throw it in dry place.
Just because you are moving items to another bin does not mean they are going to a dry place.
Sentence 1 doesn't mention what the man intends to do with the items in the bins so he may not necessarily go to throw it in a dry place.
One cannot assume that a man dumping items into a bin is trying to put them in a dry place.