17.3 Environmental Management on Construction Sites
Key Takeaways
- The occupational and environmental regimes run in parallel on every construction site, administered by different authorities, and the same activity commonly triggers both.
- Section 9(1) of the OHS Act extends the employer's duty to persons other than employees who may be directly affected, which captures dust, noise, falling material and traffic reaching neighbours.
- The NEMA duty of care is personal and continuing, obliging anyone who causes or may cause significant pollution to take reasonable measures to prevent it occurring, continuing or recurring.
- Asbestos waste engages both the Asbestos Abatement Regulations, 2020 for the removal work and the National Environmental Management: Waste Act 59 of 2008 for classification, manifest and permitted disposal.
- Section 24(2) permits action necessary to prevent a further incident, remove the injured or rescue persons, so spill containment is lawful - but every intervention must be recorded for the inspector.
17.3 Environmental Management on Construction Sites
[!NOTE] SACPCMP Blueprint Context: Annexure B item 13 pairs health and hygiene with environmental management, and the Annexure G candidate logbook uses the same combined heading. The SACPCMP therefore expects a registered construction health and safety practitioner to be conversant with the environmental regime that runs alongside the OHS Act on every South African construction site — a regime administered by different authorities, with different enforcement powers and, in several cases, heavier penalties.
1. Two Parallel Regimes, One Site
The occupational health and safety regime protects persons at work and persons affected by work activities, and is administered by the Department of Employment and Labour. The environmental regime protects the receiving environment and the public, and is administered principally by national and provincial environmental departments and municipalities.
They overlap constantly on a construction site: dust generated by cutting is a silica exposure to the worker and a nuisance and air quality matter for the neighbouring residents; a diesel spill is a fire and slip hazard on site and a water pollution incident off it; asbestos removal is a health matter under the Asbestos Abatement Regulations and a hazardous waste matter under the waste legislation. A CHSO who treats environmental obligations as somebody else's file will miss half the consequences of the events they investigate.
Note also that the OHS Act itself reaches beyond the workforce: section 9(1) requires every employer to conduct their undertaking in such a manner as to ensure, as far as is reasonably practicable, that persons other than those in their employment who may be directly affected are not thereby exposed to hazards to their health or safety. Dust, noise, falling material and traffic generated by a construction site are squarely within section 9.
2. The Principal Environmental Instruments
| Instrument | What it does on a construction project |
|---|---|
| National Environmental Management Act 107 of 1998 (NEMA) | Sets the framework environmental principles, the environmental authorisation regime for listed activities, and — critically — a general duty of care to prevent, minimise and remedy pollution and environmental degradation, with directives and personal liability for those who fail to act |
| National Environmental Management: Waste Act 59 of 2008 | Classification, storage, transport and disposal of general and hazardous waste, including asbestos, contaminated soil, solvents, paints and used oil, with a waste manifest chain of custody |
| National Water Act 36 of 1998 | Controls water use and abstraction, and prohibits pollution of water resources; dewatering an excavation and discharging silt-laden water are water-use matters |
| National Environmental Management: Air Quality Act 39 of 2004 | Dust and emissions control; the national dust control regulations set dustfall standards and complaint-driven monitoring |
| Municipal by-laws | Noise, working hours, hoarding, wash-bays, stormwater connections, waste removal and building rubble disposal |
| Environmental authorisation and EMPr | Where the project triggers a listed activity, the environmental authorisation and its Environmental Management Programme impose site-specific, legally binding conditions monitored by an environmental control officer |
[!IMPORTANT] The NEMA duty of care is personal and continuing. It obliges every person who causes, has caused or may cause significant pollution or degradation of the environment to take reasonable measures to prevent it from occurring, continuing or recurring. Unlike a permit condition, it does not depend on being licensed, and it attaches to the person in control of the activity — which on a construction site includes site management, not only the company.
3. The Construction Aspects That Generate Environmental Risk
A CHSO reviewing a method statement should be able to identify the environmental aspect alongside the safety hazard:
| Activity | Safety hazard | Environmental aspect |
|---|---|---|
| Bulk earthworks | Excavation collapse, plant-pedestrian conflict | Dust, sediment runoff to stormwater, topsoil loss, watercourse impact |
| Concrete works | Cement burns, dermatitis, formwork collapse | Alkaline washout water, batching plant dust, aggregate stockpile runoff |
| Dewatering | Electrical hazard, slips | Discharge of silt- and contaminant-laden water; National Water Act water use |
| Refuelling and plant maintenance | Fire, manual handling | Hydrocarbon spills to soil and groundwater; used oil as hazardous waste |
| Demolition | Structural collapse, silica, asbestos | Hazardous and general waste streams, dust, noise, vibration to neighbours |
| Painting and coating | Solvent exposure, fire | VOC emissions, solvent waste, wash-water |
| Site establishment | Traffic, services | Sewage from ablutions, general waste, stormwater management |
4. Controls That Belong in the Health and Safety Plan
Because the same activities generate both risks, the practical answer on a South African site is an integrated set of controls written into the same method statement:
- Dust suppression — water carts on haul roads, wet cutting, damped stockpiles, wheel-wash at the exit, and hoarding or screening to occupied boundaries. The control protects the worker's lungs under the chemical regime and the neighbour's amenity under the air quality regime simultaneously.
- Spill control — bunded fuel storage, drip trays under static plant, spill kits at every refuelling point and in every plant operator's cab, and a spill response procedure that names who reports and to whom. Hydrocarbon spills engage both fire risk under CR 25 and the NEMA duty of care.
- Waste segregation — separate, labelled, covered skips for general waste, rubble, scrap metal, timber, and hazardous waste, with a manifest for every hazardous load and the disposal certificates retained. Asbestos waste is segregated, double-bagged, labelled and disposed of at a permitted facility.
- Water management — silt traps, sediment fences, stabilised entrances, and no discharge of concrete washout or dewatering effluent to stormwater without treatment and, where required, authorisation.
- Noise and hours — municipal by-law compliance on working hours, and neighbour notification before high-noise or vibration activities, which reduces both complaints and the pressure to work unsafely at speed.
5. Incident Response Across Both Regimes
When a diesel bowser overturns on a construction site, two response tracks start at the same moment:
- Occupational: secure the scene; treat injuries; if a person died, was likely to die, or lost a limb or part of a limb, section 24(2) prohibits disturbing the site without an inspector's consent save what is necessary to prevent a further incident, remove the injured or dead, or rescue persons from danger; notify under section 24 and GAR 8; investigate within 7 days under GAR 9(2).
- Environmental: contain the spill; prevent it reaching stormwater or a watercourse; notify the relevant environmental authority and, where applicable, the catchment authority; remediate contaminated soil and dispose of it as hazardous waste; record the incident in the environmental register and report it under the environmental authorisation conditions.
The scene-preservation duty under section 24(2) and the containment duty under the NEMA duty of care can appear to conflict. They do not: section 24(2) expressly permits action necessary to prevent a further incident and to rescue persons from danger, and containment to prevent an escalating pollution incident falls within that. What the CHSO must do is record every intervention — what was moved, why, when and by whom — so that the inspector receives a scene whose alterations are documented rather than a scene that has simply been cleaned up.
A construction site's dry cutting operation generates dust that settles on washing at neighbouring houses. The contractor argues that dust is an environmental matter for the municipality and outside the OHS Act. Is that correct?
A diesel bowser overturns on site, injuring the driver seriously and spilling fuel toward a stormwater inlet. What is the correct immediate action?
Which pairing correctly matches a construction activity to its environmental instrument?