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Statement I: The good engineering practice height rule is a licence to disperse by height alone.

Statement II: The rule exists to place the release above the wake cavity generated by nearby buildings.

In the light of the above statements, choose the correct answer.

  • A.Both Statement I and Statement II are correct
  • B.Both Statement I and Statement II are incorrect
  • C.Statement I is correct but Statement II is incorrect
  • D.Statement I is incorrect but Statement II is correct

Answer: D

Correct answer: Statement I is incorrect but Statement II is correct

The good engineering practice rule is the opposite of a licence: it sets the height needed to escape the building wake, and it is used as a ceiling on the credit a plant may claim for stack height in demonstrating compliance. The intention is to stop dispersion being used as a substitute for control.

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