Exams / HS&E MAP / Preventing pollution / Question 4
HS&E MAP practice question: Preventing pollution (4 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 pumped out of an excavation is brown with silt.
What does GPP6 say?
Choose one answer.
- AA. It must be treated before any discharge
- BB. Pump it into the nearest stream
- CC. Pump it into a surface water drain
- DD. Silt is natural, so it is fine anywhere
Show the answer and explanation
Answer: A
- A. Right: Right. GPP6 says silty water must not be pumped or allowed to flow into the water environment without treatment.
- B. Wrong: Wrong. Silt smothers river life.
- C. Wrong: Wrong. Surface water drains go to watercourses.
- D. Wrong: Wrong. Silt is a common pollutant from sites.
Explanation
Treat silty water, for example by settlement, before any approved discharge. Only clean water can go to surface water drains.
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