EXC/Specific Activities/TBT-EXC-035
Contaminated Ground Awareness and Controls
Excavations › Specific Activities › Contaminated Ground Awareness and Controls
Toolbox Talk
Contaminated Ground Awareness and Controls
Excavating on brownfield or former industrial sites can expose workers to contaminated soils containing heavy metals, hydrocarbons, asbestos, or chemical residues. These substances can cause serious health effects through skin contact, inhalation of dust and vapours, or accidental ingestion. This talk explains how to recognise contaminated ground, the health risks involved, and the controls every operative must follow.
Key Hazards
Skin absorption of toxic chemicals from direct contact with contaminated soil
Inhalation of volatile organic compounds released during excavation
Unidentified asbestos fibres present in made ground or demolition fill
Groundwater contamination spreading pollutants beyond the work area
Control Measures
- Review the site investigation report and contamination assessment before starting any excavation.
- Wear full PPE including chemical-resistant gloves, overalls, and RPE as specified in the COSHH assessment.
- Monitor air quality for volatile organic compounds during excavation in known contaminated areas.
- Segregate contaminated and clean materials into clearly marked stockpile areas on site.
- Cover contaminated stockpiles with sheeting to prevent dust generation and rainwater runoff.
- Wash hands and forearms thoroughly before eating, drinking, or smoking after handling contaminated soil.
- Report any unusual smells, discoloration, or unexpected materials encountered during digging.
- Ensure contaminated material is disposed of to a licensed facility with correct waste documentation.
- Brief all operatives on the types of contamination expected and the specific controls for each area.
Remember
- Review the site investigation report before excavating on any brownfield or former industrial site
- Wear chemical-resistant gloves, overalls, and RPE as the COSHH assessment specifies
- Report any unusual smells, soil discoloration, or unexpected buried materials immediately
- Segregate contaminated soil from clean material in clearly marked separate stockpile areas
- Wash hands and forearms thoroughly before eating, drinking, or smoking after soil contact
- Contaminated material must be disposed of to a licensed facility with correct documentation
Applicable Legislation: COSHH Regulations 2002 · Environmental Protection Act 1990 · CDM Regulations 2015 · CLR11 (Model Procedures for Contaminated Land)
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