Who bears temporary storage costs during repairs - HOA or owner?

Our 28 unit building has two storage lockers, one with 19 deeded lockers and the other with nine. The smaller one has developed a serious mold problem, but the contractor we have engaged to perform the cleaning says that the lockers must be empty in order for his crew to have the room to access the walls. This will involve each locker owner removing their possessions and storing them elsewhere for about one week. My question is which party is responsible for the costs that will be incurred for some sort of temporary storage: the HOA or the individual owner? There is no other place in the common areas for these goods to be stored and our docs are silent on naming the responsible party.