Grade-A has been cleared under 40 CFR 180.940 (a) for use on food Processing Equipment and Utensils in Dairies and Public Eating Establishments, Food Contact Surfaces, Food Processing Equipment and Utensils, in Food Processing Plants and other food-contact articles at a concentration of 200 – 400 ppm active. Regular, effective cleaning and sanitizing of equipment, utensils, and work or dining hard, non-porous surfaces which could harbor food poisoning microorganisms minimizes the probability of contaminating food during preparation, storage or service. Effective cleaning will remove soil and prevent the accumulation of food residues, which may decompose or support the rapid development of food poisoning organisms or toxins. Application of effective sanitizing procedures reduces the number of those organisms which may be present on equipment and utensils after cleaning, and reduces the potential for the transfer, either directly through tableware such as glasses, cups and flatware or indirectly through food. To reduce cross-contamination between hard, non-porous treated surfaces, kitchenware and food-contact surfaces of equipment must be washed, rinsed with potable water and sanitized after each use and following any interruption of operation during which time contamination may have occurred. Where equipment and utensils are used for the preparation of foods on a continuous or production-line basis, utensils and the hard, non-porous food-contact surfaces of equipment must be washed, rinsed with potable water and sanitized at intervals throughout the day on a schedule based on food temperature, type of food, and amount of food particle accumulation. Articles that can be immersed in solution must remain in solution for 60 seconds. Articles or surfaces too large for immersing must be visibly wetted or flooded by rinsing, spraying or swabbing. Allow all sanitized surfaces to drain and air dry.   Grade-A can be used in the Pro-Con system. Not all disinfectants or sanitizers are available in all states.