REM/Specific/TBT-REM-010

Bioremediation Safety

Remediation & Contaminated Land › Specific › Bioremediation Safety

Presenter		Project
Location		Date

Bioremediation uses microorganisms to break down contaminants in soil and groundwater.
Common techniques include biopiles, landfarming, bioventing, and bioaugmentation.
Workers handle contaminated soils that may contain hydrocarbons, heavy metals, and toxic chemicals.
Biopile construction involves excavating, screening, and placing contaminated soil in treatment beds.
Nutrient dosing and aeration systems are used to optimise microbial activity in treatment areas.
Volatile organic compounds (VOCs) can be released during soil turning and aeration operations.
COSHH assessments must cover all contaminants present and routes of exposure for workers.
Dust from contaminated soil handling requires RPE and on-site decontamination procedures.
Environmental monitoring of air quality, leachate, and groundwater is required throughout treatment.
Personal hygiene is critical — workers must decontaminate before eating, drinking, or leaving site.

Chemical exposure	Handling contaminated soils exposes workers to hydrocarbons, heavy metals, and VOCs through skin contact and inhalation.
Environmental protection	Uncontrolled release of contaminants from treatment areas can pollute groundwater and surface water.
Legal duty	Environmental permits and COSHH regulations require strict control of contaminated material handling and treatment.

Don't

Complete a COSHH assessment covering all identified contaminants before work starts
Wear RPE, chemical-resistant gloves, and disposable coveralls when handling soils
Install impermeable liners beneath biopiles to prevent leachate escaping to ground
Monitor air quality for VOCs and dust during excavation and soil turning operations
Provide on-site decontamination facilities including boot wash and hand washing
Follow the environmental permit conditions for the treatment process at all times
Test soil samples regularly to confirm contamination levels are reducing as planned
Brief all workers on the specific contaminants present and required precautions
Keep nutrient and chemical dosing systems secure and correctly labelled
Maintain environmental monitoring records and report any exceedances promptly

DON'T handle contaminated soil without appropriate PPE and COSHH controls
DON'T eat, drink, or smoke on the treatment area — decontaminate first
DON'T allow contaminated runoff or leachate to escape the treatment area
DON'T turn or aerate biopiles in high winds without dust control measures
DON'T ignore headaches, nausea, or skin irritation — report symptoms immediately
DON'T mix treated and untreated soils without verification testing
DON'T skip environmental monitoring — permit conditions must be met continuously
DON'T store nutrient chemicals near watercourses or drainage outlets
DON'T allow unauthorised access to the bioremediation treatment area
DON'T dispose of treated soil without validation testing confirming it meets criteria

See also: Contaminated Land Safety Awareness | Hydrocarbon Contamination Clean-Up

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