Chemical spills on construction sites can result from fuel storage failures, overturned vehicles, damaged containers, or incidents at chemical dosing areas. The response must be rapid to prevent harm to workers, contamination of watercourses, and environmental damage. The type of chemical determines the response: some require evacuation, some require containment, and some require specialist hazmat teams. Every worker must know where the spill kits are located and how to use them for minor spills, and when to evacuate for major incidents.
Key Hazards
Skin and eye burns from direct contact with spilled corrosive chemicals
Toxic vapour inhalation from volatile chemical spills in enclosed areas
Environmental pollution of watercourses and drainage systems from uncontained spills
Fire or explosion from spilled flammable liquids finding an ignition source
Control Measures
Identify the spilled substance from container labels or the safety data sheet before approaching.
For minor fuel or oil spills, deploy the nearest spill kit and contain the spread immediately.
For corrosive, toxic, or unknown chemical spills, evacuate the area and call for specialist response.
Block any nearby drains and surface water outlets to prevent contaminated runoff reaching watercourses.
Wear the PPE specified on the safety data sheet before handling any spill response materials.
Report all spills immediately to your supervisor and the site environmental coordinator.
Do not wash spilled chemicals into drains, watercourses, or soil — contain and absorb them.
Dispose of all contaminated absorbent materials as hazardous waste through the correct disposal route.
Know the location of the nearest spill kit and check it is fully stocked at the start of each shift.
Emergency / Rescue
For a major chemical spill involving toxic vapours, corrosive substances, or fire risk, evacuate upwind and call 999 requesting the fire service hazmat team. Do not attempt to contain major spills without specialist PPE and training.
Remember
Identify the chemical before you approach — the safety data sheet tells you the correct response.
Minor fuel and oil spills should be contained immediately using the nearest spill kit.
Major spills of corrosive, toxic, or unknown chemicals require evacuation and specialist response.
Block nearby drains to prevent chemicals reaching watercourses — this prevents prosecution.
Contaminated absorbent materials are hazardous waste and must be disposed of correctly.
Know where the spill kits are and check they are stocked — an empty kit is useless in an emergency.