It prepared what is known as a Remediation Method Statement (RMS) to ensure nearby watercourses are not polluted by chemicals during the clean up.

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Mr Broughton said his boss, John Eardley, rang him a week after Mr Farr's death to ask him to retrospectively sign a method statement, a risk assessment and a computer-aided drawing of the barrier's construction.

BBC: Last Updated: Monday, 6 March 2006, 19:55 GMT

"It is important to understand that the correction centered on the description of a single statistical method, " Kim said in a statement.

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Both Edwards and Steptoe faced intense publicity and criticism from those opposed to the method, including the Vatican, after Brown's birth, according to the statement.

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"The anchored method of stroke has been a subject of controversy within the golf community for quite some time, " the joint statement said.

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