Solvent fumes, 44 learners and one louvre window
At a junior secondary school in a dry region of Botswana, a JCE Creative Arts teacher has 44 learners in one class that meets for an 80-minute double period each week. The room is a general classroom: one louvre window, one door, no sink, no extraction fan, and outside temperatures above 32 °C. The planned painting unit asks learners to prime boards with oil-based enamel and to finish charcoal drawings with an aerosol fixative. In the first lesson two learners complain of headache and nausea, and a third learner has asthma and carries an inhaler. The teacher has 12 tins of solvent-based enamel left from a donated consignment, a box of charcoal, and a cupboard containing water-based acrylics, tempera blocks, brushes and paper. There is no material safety data sheet on file and no spray booth. The head of department wants the unit completed exactly as written because the end-of-term practical is five weeks away. The teacher must decide what to teach next week and how to keep the practical credible.
1. Identify the hazards in this unit, explain how you would rank them, and set out your control measures in priority order. Justify why personal protective equipment is not your first answer.
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Hazard identification. The main agents are volatile organic compounds from the enamel and any thinners, aerosol propellant and fine particulates from the fixative, charcoal dust, flammable liquids and vapour near electrical points, contaminated rags, spills on a smooth floor, and skin contact with no washing water. Crowding (44 learners at shared tables in 32 °C heat) and the asthma diagnosis turn these into a foreseeable acute risk, not a nuisance.
Ranking. Risk is severity × likelihood. A severe asthma attack is high severity but lower likelihood; chronic and acute vapour exposure is high likelihood in a single-window room and high severity, so it comes first. Fire from solvent-soaked rags is low likelihood but very high severity. Slips and dermatitis sit lower.
Hierarchy of control.
- Eliminate: drop the solvent enamel and the aerosol from learners' hands entirely.
- Substitute: water-based acrylic primer instead of enamel; dry media (soft pastel, conte, graphite) instead of a fixative-finished charcoal drawing; if a fixative is genuinely needed, the teacher applies it outdoors with learners well away.
- Engineering: work outdoors in shade or in a cross-ventilated space, use a fan to move air, keep a sealed metal bin for contaminated rags, wipe floors wet.
- Administrative: rotate four groups of 11 so no learner is exposed for more than 20 minutes, brief learners on the asthma register, bar eating and drinking, supervise storage, agree a spill procedure.
Why PPE comes last. A mask that is not fitted leaks, and children rarely fit adult disposables; gloves do not stop vapour and create a false sense of security while the actual exposure continues. PPE protects the individual only after the hazard has been reduced as far as possible, and it depends on correct use by 44 learners at once. Removing the solvent at step one is both more protective and more enforceable.
2. The end-of-term practical asks learners to 'produce a tonal charcoal drawing finished with fixative'. Explain how you would keep the assessment valid if you remove the solvent materials, and what evidence you would keep.
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The first move is to separate the construct from the method. Read the marking criteria rather than the materials list: tonal drawing rubrics almost always reward a range of tones, control of edges, observed form, composition and craftsmanship. Fixative is a workshop step, not a thing being assessed, so removing it does not remove the skill.
Substitution. Soft pastel, conte or graphite on toned paper presents the same tonal problem, often more demandingly, because learners must build light over dark and reserve highlights. Keep the demand constant: the same number of tonal steps, the same light source, the same 60-minute supervised time, the same compositional requirements. Use masking and light strokes instead of erasing, which is a legitimate technique in its own right.
Where the medium is named. If the syllabus or the examination council explicitly names charcoal plus fixative, do not silently change the task. Apply in writing for approval of an equivalent task, attach the risk assessment, and in the meantime set an alternative session outdoors or in a borrowed ventilated hall under the same supervision rules.
Evidence for moderation. Keep the completed work, a per-learner rubric with criterion-level marks and comments, dated sketchbook pages showing tonal trials, an annotated photograph of each work under the same lighting, a teacher observation checklist, and a signed note explaining the adaptation and its rationale. Filed together, that record shows the standard was held, not lowered, and it answers any parent or moderator query.
3. Ten minutes into the next lesson a learner reports dizziness and blurred vision. Describe your immediate actions, your follow-up, and what you say to the class.
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Immediate. Stop the activity and signal quiet. Take the learner, with a second adult or a responsible learner, to fresh air outside the door, seated upright, not lying flat. Do not send the learner away alone. Assess against the school's first-aid and asthma protocol: check breathing and speech, help the learner use their inhaler if prescribed and if they can do it themselves, and follow the individual health-care plan. Call the school nurse or first aider and the parent or guardian. If breathing worsens or the learner cannot speak in full sentences, treat it as an emergency and arrange transport to the clinic.
The rest of the class. Move immediately to a non-solvent task, in another room or outdoors, so the exposed space can be ventilated and cleaned. Open windows and door, switch off fans near spills, wet-wipe surfaces and bag the rags in a lidded metal bin. No learner returns to solvent work that day.
Talk to the class. Keep it factual and brief: a learner felt unwell, the class is moving to the next task, and the room needs airing. No blame, no speculation, no discussion of the learner's medical condition.
Follow-up. Record the incident in writing the same day, inform the HOD and the family, and review the risk assessment before any further painting. If the cause was fume build-up, the controls failed; the answer is ventilation and substitution, not telling learners to 'open a window and get on with it'. That record is also the professional evidence that duty of care was exercised.