2.1 The ground to be covered by a building includes the ground to be covered by its foundations.
2.2 In all cases, appropriate site investigations should be undertaken to check for the presence of contaminants. Contamination may arise from sources outside of the site e.g. landfill (see par. 2.18).
2.3 As a preliminary measure, investigation of previous uses of a site should be considered, e.g. from local knowledge or by examination of local authority planning records. Examples of sites which are particularly likely
to have been contaminated by their past or present uses are given in Table 1. Some signs of the possible presence of contaminants are given in Table 2.
2.4 Detailed guidance on the identification and investigation of sites is contained in BS 5930 : 1999 (see also par. 2.18).
Table 1 Sites likely to contain contaminants
Table 2 Possible contaminants