Sun Safety For Field Workers
Mandatory ultraviolet radiation and heat stress management protocol for all personnel performing outdoor duties. This SOP addresses UV exposure limits, hydration discipline, PPE requirements, work-rest cycling based on humidex, and emergency actions for heat illness — aligned with WorkSafeBC requirements and CSA Z432 machinery safety principles applied to environmental hazards.
To establish a mandatory and repeatable protocol that protects field workers from acute and chronic health effects of solar ultraviolet radiation and heat stress. This SOP reduces the risk of sunburn, photokeratitis (snow blindness), heat exhaustion, heat stroke, and long-term skin cancer among personnel working outdoors in Canadian climatic conditions. By standardizing pre-shift planning, PPE selection, hydration discipline, and work-rest cycles, the procedure ensures consistent compliance with WorkSafeBC OHS provisions for outdoor workers.
This SOP applies to all employees, contractors, and temporary workers who perform duties outdoors for 30 consecutive minutes or longer between April 1 and October 31 in British Columbia (or equivalent UV season in other provinces). Covered work includes: construction site labour, pipeline and utility maintenance, arboriculture, landscaping, agricultural field work, surveying, road crew operations, and any other outdoor industrial task. Supervisors, safety coordinators, and crew leads are equally subject to these protocols and are responsible for enforcement at the crew level.
- Never rely on sunscreen alone — it is a secondary defence. Primary protection comes from UPF 50+ clothing, wide-brimmed headwear, and shade structures. Sunscreen must be reapplied every 2 hours and immediately after heavy sweating or immersion.
- Heat illness can mimic fatigue or distraction — use the buddy system. If a worker appears confused, disoriented, or collapses, assume heat stroke and activate emergency response immediately. Do not leave the worker unattended.
- Do not modify sun PPE. Adding a sun brim to a hard hat must use manufacturer-approved attachments only. Never cut vent slots or remove sweatbands as this compromises both sun and impact protection.
- Thirst is a late indicator of dehydration. Workers must drink 250–300 mL of water every 20 minutes during moderate to high heat conditions (humidex ≥ 30). Caffeinated or alcoholic beverages are prohibited during outdoor shifts.
- Skin cancer risk is cumulative. Every UV exposure event adds to lifetime dosage. Workers with fair skin, a history of sunburns, or family history of melanoma must be assigned priority seating in shade breaks and monitored for compliance.
- Broad-spectrum sunscreen SPF 30+ (water-resistant, 60 mL per worker per shift minimum)
- UV-blocking safety glasses or shaded goggles (ANSI Z87.1 with UV400 rating)
- Wide-brimmed sun hat (minimum 7.5 cm brim all around) or hard hat with OEM sun brim attachment
- Lightweight long-sleeve shirt and full-length pants (UPF 50+ rated fabric preferred; otherwise dark-coloured, tightly woven cotton/poly)
- Personal hydration system (1.5 L minimum capacity per worker, pre-filled at start of shift)
- Electrolyte powder or tablets (1 packet per 1 L water for humidex ≥ 30)
- Portable shade structure (pop-up canopy or large umbrella, minimum 2.5 m² coverage per crew)
- Cooling towels or neck gaiters (at least one per worker)
- UV index meter or weather app (for real-time monitoring on site)
- First-aid kit with heat illness response supplies: instant ice packs, spray bottle for water misting, oral rehydration salts, portable fan, thermometer
- Communication device (radio or mobile phone) for emergency contact