Document MMxzJdJbmMnB6o1Zq6dOp3q3L

20--Industrial Sanitation and Personnel Facilities Utensils should be carefully scraped and preferably pre-rinsed before being put into the detergent solution ' They should be thor oughly washed with soap or a detergent, and well rinsed by a method which will destroy bactena For thorough machine washing, the utensils must be stacked m the trays loosely enough so that the cleansing agent gets to every part, the concentration of detergent m the wash water and the wash water temperature must be maintained The wash water must be changed before it becomes excessively dirty Spray nozzles in the dish washing machine must be cleaned daily to maintain proper flow and distribution Requirements for hand washing are the same, except that each utensil must be in dividually scrubbed in all parts rather than simply stacked in a tray For nnsmg, the cleaned utensils may be immersed in clean hot water at 170 F for onehalf minute One problem is that of main taining the temperature of the rinse water over long sessions of dishwashing, since a large volume of fresh hot water is required for this method Water heaters should be of adequate size Less water, however, will be needed if a chemical sterilizing agent is used Hypochlonte solutions at a concentration of at least 50 ppm of available chlonne for an immersion time of one minute at 75 F will provide adequate sterilization Cabonic qua ternary ammonium germicides are also suit able When die utensils have been properly cleaned, they should be stored and handled so as to prevent contamination by the han dler's fingers and from ordinary dust and dirt or from leakage from overhead pipes References American Dietetic Associabon, 620 N Michigan Ave, Chicago, 111 60611 American Medical Association, Council on Foods, 535 N Dearborn St, Chicago, 111 60610 American Public Health Assn , 1790 Broadway, New York City 10019 Standard Methods for the Examination of Water and Wastewater 12th ed 1965 American Nabonal Standards Insbtute, 1430 Broadway, New York, N Y 10018 Air Gaps in Plumbing Systems, A112 1 2 "Cast Iron Pipe and Fittings," A21 Senes Drinking Fountains and Mechanically Refrigerated Drinking Water Coolers, A112 11 1 "Gas-Burning Appliances," Z21 Senes "Iron and Steel Pipe," B36 Senes Minimum Requirements for Non-Water Carnage Disposal Systems, Z4 3 Minimum Requirements for Sanitation in Places of Employment, Z4 1 Minimum Requirements for Sanitation in Temporary Labor Camps, TA 4 National Electncal Code, Cl "Pipe Flanges and Fittings," B16 Senes "Plasbc Pipe," B72 Senes Specifications for Making Buddings and Facilities Accessible to, and Usable by, the Physically Handicapped, A117 1 Threaded Cast-Iron Pipe for Drainage, Vent, and Waste Services, A40 5 American Standard and Sanitary Corp, 40 W 40th St, New York, N Y 10018 National Plumbing Code Amencan Waterworks Associabon, 2 Park Ave , New York, N Y 10016 Burton, B T (ed ) The Heinz Handbook of Nutation New York, McCraw-Hill Book Co , 1959 Environmental Management Associabon, 1710 Drew St, Clearwater, Fla 33515 Hopkins and Schulze, The Practtce of Sanitation, 4th ed Baltimore, Md, Williams & Wilkins, 1970 546