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