What is the recommended bleach solution ratio mentioned for cleaning spills?

• A. 9:1
• B. 1:9
• C. 10:1
• D. 7:1

Answer: (A)

When cleaning up spills, using a bleach solution diluted to an effective yet safe level is the key idea. The recommended mix is one part bleach to nine parts water, which gives about 0.5% available chlorine in the final solution. That concentration is strong enough to disinfect surfaces after a spill while reducing fumes, skin irritation, and damage to materials. Since it's all about parts, this dilution can be described as nine parts water to one part bleach, which is the same result. The important point is achieving that 0.5%-level disinfectant correctly to ensure proper cleaning.