Massachusetts Wastewater Practice Exam

The correct method for cleaning up spills of oily wastewater involves the use of absorbent materials, which are designed to effectively manage oil-based substances. While the choice provided as "B" refers to acid, which is not a standard or effective method for handling oily wastewater. The best practices generally include methods such as using absorbent materials (like pads or booms specifically designed to soak up oil), bioremediation, or specialized cleaning agents that can break down hydrocarbons without causing further pollution.

Distilled water would not effectively clean oily substances as it does not interact with oil. Soap could potentially help since it breaks down oils and helps wash them away, particularly in smaller spills. Baking soda, while it can neutralize some substances and is generally a good cleaning agent, is not specifically effective for oily wastewater spills.

In summary, a more appropriate approach would involve strategies that utilize absorbent materials and specialized cleaning agents tailored for oily situations, which creates a better environmental and safety outcome than using chemicals such as acids.