A construction crew is working outdoors in Fresno when the temperature reaches 95°F. According to Cal/OSHA heat illness prevention requirements, what is the minimum frequency for providing preventative cool-down rest periods?
Correct Answer
C) Every hour
Cal/OSHA Section 3395 requires preventative cool-down rest periods at least every hour when temperatures reach 95°F or above for outdoor workers.
Why This Is the Correct Answer
Cal/OSHA Section 3395 triggers enhanced heat illness prevention measures at 95°F and above (the 'high heat' threshold). At this level, employers must ensure workers take a preventative cool-down rest period of at least 10 minutes every hour.
Why the Other Options Are Wrong
Option A: Every 30 minutes
Every 30 minutes is not the regulatory requirement. Cal/OSHA specifies every hour at high heat, not every 30 minutes. Shorter intervals may be beneficial but are not mandated.
Option B: Every 2 hours
Every 2 hours is too infrequent. At temperatures of 95°F or above, waiting 2 hours between rest periods creates unacceptable heat illness risk and violates Section 3395.
Option D: Only when requested by employees
Waiting only when employees request rest is insufficient and non-compliant. Cal/OSHA requires proactive, scheduled rest periods at high heat — not reactive ones.
Memory Technique
At 95°F, think '95 = once per hour.' The 9 and 5 together remind you: 9 + 5 = 14 letters in 'once per hour' (mnemonic stretch), or simply: hot enough to rest every hour.
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