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HS&E MAP practice question: Preventing pollution (3 of 4)

E. Environment A free question from our original HS&E MAP practice exam. Try it, then open the answer to see why each option is right or wrong.

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Water from washing out a concrete mixer needs dealing with.

What does GPP6 say?

Choose one answer.

  1. A. Tip it into the nearest surface water drain
  2. B. Use it in the wheel wash
  3. C. Let it soak into the ground
  4. D. Collect it in an impervious container
Show the answer and explanation

Answer: D

  • A. Wrong: Wrong. Concrete washwater is highly alkaline and harms watercourses.
  • B. Wrong: Wrong. GPP6 says concrete-contaminated water isn't suitable for wheel washing or dust suppression.
  • C. Wrong: Wrong. It can pollute ground and water.
  • D. Right: Right. GPP6 says washwater from equipment in contact with concrete must be collected in an impervious container and treated for reuse if possible.

Explanation

Collect concrete washwater in an impervious container. Never let it reach drains or watercourses.

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