1.   As the building came down, it was sprayed with a chlorine solution, he said.

2.   Before it goes into oxygen-controlled bags, ready-to-eat lettuce is washed in a chlorine solution and then in clean water.

3.   Disinfect sponges in a chlorine bleach solution or by microwaving them on high for one minute, and replace them when worn.

4.   Wash it often with a chlorine solution and empty it frequently.

5.   Wipe the insides of the refrigerator with a chlorine solution.