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Discussion

The first stage of a site investigation is normally

  • A.installation of long-term monitoring instruments
  • B.a desk study of existing records and maps
  • C.a full programme of rotary cored boreholes
  • D.laboratory testing of samples from the site

Answer: B

Published maps, memoirs, aerial photographs and records of neighbouring works cost almost nothing and shape everything that follows. Starting with boreholes means drilling without knowing where the problems are likely to be.

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