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Ground force


With regard to your article 'digging for dirty secrets' (NCE, 1 March), ground investigation often proves to be a costly experience for any construction project.

But while knowing of chemically or radioactively contaminated ground increases project costs for clearance or treatment, not knowing bears the risk of time delays and overspending.

In the interest of the overall budget for the Olympics and London's taxpayers, I strongly hope that most attention is paid to the large-scale 'ground investigations' already under way in the area.

For example, the project to undermine the entire area with power cable tunnels. These have a diameter of up to 4m, are up to 26m deep and will result in a 'ground sample' of 160,000m 3 to 180,000m 3.

The excavated muck could give vital hints regarding type, location and extent of contamination.

Gabi Chlebowski (M), gabi_ground@gmx. de

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