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D Harrison & R Watts, Supermarkets face £10 million bad fuel bill, Daily Telegraph, 4 March 2007, p 1

In UK, the supply of gasoline through 221 forecourts of three supermarket outlets was contaminated by silicon, used as an anti-foaming agent for diesel fuel, damaging oxygen sensors in thousands of modern cars with computer fuel management systems. The silicon was traced to a chemical additive used by Harvest Energy that shares a storage tank at Vopak's distribution terminal at West Thurrock, Essex.

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