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A Preliminary Site Investigation (PSI) is often required for a development application. This incorporates a desktop study of the site and relevant regulatory databases, an appraisal of site history including adjoining land uses. Where a site history and inspection can demonstrate that past or present site activities have been non-contaminating, there is no requirement for further investigation.
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If the PSI indicates that the land is potentially contaminated or if previous land-use is considered a risk, then a Stage 2 – Detailed Site Investigation is required.