The department and each county sealer shall enforce the provisions of this chapter, and may sample, inspect, analyze, and test any product referred to in this chapter manufactured, packed, stored, sold, or distributed within this state. The department, through its agents, has free access by all legal means during business hours to all premises, buildings, vehicles, cars, and vessels used in the manufacture, packing, storage, sale, or transportation of, and may, by legal means, open any box, carton, parcel, or container of, any product referred to in this chapter and take therefrom samples for analysis or for evidence.