ANSWER ALL QUESTIONS (9 MARKS)

On 1^st June 1974 the Nypro (UK) site at Flixborough was severely damaged by a large explosion. Twenty-eight workers were killed and a further 36 suffered injuries. Offsite consequences resulted in fifty-three reported injuries. Property in the surrounding area was damaged to a varying degree.

A 20 inch bypass system ruptured, which may have been caused by a fire on a nearby 8 inch pipe. This resulted in the escape of a large quantity of cyclohexane. The cyclohexane formed a flammable mixture and subsequently found a source of ignition. At about 16:53 hours there was a massive vapour cloud explosion, which caused extensive damage and started numerous fires on the site. Eighteen fatalities occurred in the control room as a result of the windows shattering and the collapse of the roof. No one escaped from the control room. The fires burned for several days and after ten days those that still raged were hampering the rescue work.

1. Discuss ONE (1) type of control discuss under USECHH and provide an example how you may relate it to the above case. (3 marks)
2. Elaborate how the chemical supplier need to package the chemical base on the requirements of CLASS? (3 marks)
3. Discuss how do you relate the above incident towards USECHH or CLASS? (3 marks)