Ask the assessment to support a clear decision
A Phase 1 contaminated land assessment can help you understand a site before purchase or redevelopment. However, the brief matters. A report prepared for one proposal may not answer the questions raised by a different use.
Start by explaining the decision you need to make. Give the consultant the site boundary, intended use, purchase programme and available records. Include earlier reports in full, including appendices and any regulator correspondence.
The Environment Agency’s LCRM guidance starts with preliminary risk assessment. This includes a desk study, site walkover and initial conceptual site model. That model connects possible contamination sources, pathways and the people or environmental features that could be affected.
Know what the first stage does — and does not — establish
| Useful output | Question still to resolve |
|---|---|
| Historical land-use review | Are there gaps in the records or activities whose precise location is uncertain? |
| Site walkover observations | Were all areas accessible, and could relevant features be hidden? |
| Initial risk assessment | Which possible contaminant linkages need further investigation? |
| Recommendations | What work is needed, for which decision, and before which project milestone? |
A preliminary report is not a blanket certificate that land is contamination-free. Equally, identifying a potential linkage does not prove that unacceptable contamination is present. The next step should follow the evidence and the proposed use.
Read the limitations before comparing prices
Check whether quotations include a walkover, the same boundary and the same intended use. Also check access arrangements, information assumptions and the form of the report. If you need a lender or another party to rely on it, discuss that requirement before commissioning.
For an existing report, ask whether it covers the current proposal and whether its information remains suitable. Avoid assuming that a recent date alone makes a document transferable to your project.
Turn uncertainty into a decision plan
Imagine a former workshop is being considered for housing with private gardens. This is an illustrative example. Historical records suggest fuel storage, but its position is unclear and part of the site is inaccessible.
The useful response is to record those gaps and agree proportionate next steps with a competent specialist. Do not convert an uncertain tank location into a precise remediation budget. Instead, identify the information needed before the relevant purchase or design decision.
Finally, give the findings to the wider design team. Foundations, drainage, landscaping and earthworks may all depend on the ground conditions. Keep assessment and design changes connected throughout the project.
Explore ACP’s contaminated land assessment service or send us your site information.
Source and scope
Reviewed 10 October 2026 against the Environment Agency’s LCRM Stage 1 risk assessment guidance. Site-specific requirements and reliance arrangements should be agreed with the appointed specialist.