Store scoops and tongs with handle extended out of the food. Chemicals that you add to food as you prepare it are food additives . You cannot add sulfiting agents at a store or restaurant. In the State of Oregon there is a law against adding these chemicals at the retail level. You cannot use ingredients for freshening or whitening if they contain sulfiting agents.
Some people are allergic to sulfites.
Employees in food service should learn what menu items have sulfites, so that they can tell their customers who ask. If anyone complains about getting sick from food additives, you or your supervisor must report it to the Health Department.