The assisted living facility may combine areas used for handling and storing clean laundry, and areas used for storing, preparing and handling clean and sterile nursing supplies, equipment and medications, into a single area on the premises only when the assisted living facility:

(1) Equips the area with:

(a) A handwashing sink; and

(b) A work counter or table.

(2) Ensures that any work or function performed in the area is performed without significant risk of contamination from other sources; and

(3) Stores medications separate from all other stored items consistent with WAC 388-78A-2260.