being screened, large doors, such as those routinely installed at 

 loading docks, should be protected by such devices as fly fans. 

 Double-entry doors should be used at all entryways into processing 

 areas. 



Despite all of these measures, however, insects will find a way 

 to get in, so mechanical devices, such as traps or pesticides, 

 should be used. 



When they are used, extra care should be taken to ensure that 

 traps do not hang directly above food products or processing tables 

 and that drift of the pesticide can in no way contaminate the product. 

 The safest way to eliminate all possibility that a pesticide will 

 contaminate the product is to avoid its use in all food-product zones. 

 The pesticide itself must be one that has been approved by the U.S. 

 Department of Agriculture for use in food-processing plants. 



FLOORS, WALLS, AND CEILINGS 



All floors should be of a hard, impervious material that tends 

 to remain free of cracks and any other roughness that would inter- 

 fere with proper cleaning. The floors should slope toward suitable 

 rodent-proof drains so that the water will drain after the floors 

 are washed down. 



The walls, ceilings, partitions, posts, doors, and other integral 

 parts of all buildings should be of such materials, construction, 

 and finish so that they can be washed efficiently and thoroughly. 



WATER, PLUMBING, AND OTHER FACILITIES 



Water should be easily accessible, under sufficient pressure for 

 adequate cleaning, and from a source approved by the State health 

 authorities. All private water systems must be constructed and 

 operated in accordance with the recommendations contained in 

 Public Health Reports , Reprint No. 24, "Individual Water Supply 

 Systems" (Available from U.S. Public Health Service, Bethesda 

 Office Center, Rm. 26, Bethesda, Md. 20014). 



Plumbing must be installed in compliance with State and local 

 ordinances, or, in the absence of such ordinances, it must meet or 

 exceed the standards recommended in the American Standard 

 National Plumbing Code, ASA-A40.85 1955 (Available from United 

 States of America Standards Institute, 10 E. 40th St., New York, 

 N.Y. 10016). Lavatories with hot and cold water should be located 

 so that plant personnel can readily use them. At each of these 

 lavatories, a nail brush should be provided; the brush should be 



