7 Pa. Code § 59a.324
A separate room shall be provided for the transfer of bulk dry dairy products from bags or drums to the hoppers and conveyors which lead to the fillers. The room must meet the same requirements for construction and facilities as the bulk packaging operation. Areas and facilities providing for the transfer of dry dairy products from portable bulk bins will be acceptable if gasketed surfaces or direct connections are used that essentially eliminate the escape of product into the area.