Once the remediation finally begins, it will be the biggest such job in Europe, involving two million tonnes of soil on a site that measures 3.24 million square feet.Soil removal will be expensive. The Standard reports a possible cost of over £80m.
The greenest techniques were promised, including soilwashing on site, introducing micro-organisms that "eat" contaminants and "cooking" contaminated soil at high temperatures to sterilise it.
However, natural or semi-natural methods are relatively slow and there is growing concern that the agency will be forced to adopt the costliest, most environmentally damaging procedure, known as "dig and dump". Dr Carey [of Greenwhich University] said: "Because they are getting so short of time, they might end up doing it the quickest way, which is just to dig up the contaminated soil and take it away but it would be a tragedy if they did that."
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