Heat, PPE, and a Worker Who Feels Ill
On a 92°F day, an applicator is mixing and loading an organophosphate insecticide (label: Danger/Poison, signal word on label, requires chemical-resistant gloves, long-sleeved shirt, long pants, boots, and a respirator during mixing/loading). The applicator wears nitrile gloves, a long-sleeved cotton shirt, jeans, and boots, but removes the respirator because it is hot and fogs up. During mixing, a splash hits the forearm above the glove. Two hours later the applicator feels dizzy, has a headache, blurred vision, and is sweating heavily.
1. Identify the likely cause of illness and the immediate first-aid response.
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The symptom cluster - dizziness, headache, blurred vision, heavy sweating, occurring after mixing an organophosphate - is consistent with cholinesterase-inhibiting insecticide exposure (cholinergic toxidrome). Contributing factors:
- Respirator removed: inhalation exposure during mixing/loading, which the label required.
- Splash on bare forearm: dermal absorption; OPs absorb readily through skin.
- Heat: masks early symptoms (sweating, dizziness) and increases absorption and heat stress.
Immediate first aid:
- Stop work, move to fresh air, remove contaminated clothing.
- Wash skin thoroughly with soap and water - do not scrub harshly; flush eyes if exposed.
- Call 911/Poison Control and get medical care immediately; bring the label.
- Do not induce vomiting unless directed. Atropine is a medical treatment - do not self-administer.
- Notify supervisor and document the incident.
2. What PPE and work-practice failures occurred, and how should the operation be changed for hot weather?
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Failures:
- Respirator removed during mixing/loading - a direct label violation and the likely inhalation route.
- Bare forearm above the glove - gloves alone are insufficient; sleeves must cover the wrist/forearm and gloves should be worn over the sleeve cuff or with a sealed interface.
- Cotton shirt may not be chemical-resistant; the label specified PPE, and a chemical-resistant apron/suit is appropriate for mixing/loading.
Hot-weather corrections:
- Use the required respirator; select a comfortable fit, take breaks in shade, and rotate tasks.
- Wear chemical-resistant sleeves/apron and gloves with proper overlap.
- Hydrate, schedule mixing/loading for cooler hours, and use a closed mixing/loading system if available.
- Train workers on heat illness vs. pesticide symptoms and stop-work authority.
Never trade required PPE for comfort; if PPE cannot be worn safely, the job should be rescheduled.