A construction site in Fresno is experiencing temperatures of 95°F with 40% humidity. According to Cal/OSHA heat illness prevention requirements, what is the minimum frequency for providing preventive cool-down rest periods?
Correct Answer
C) Every 2 hours
Cal/OSHA Section 3395 requires preventive cool-down rest periods in the shade for at least 5 minutes every 2 hours when temperatures reach 95°F or above.
Why This Is the Correct Answer
Cal/OSHA Section 3395 (Heat Illness Prevention) establishes specific requirements for high heat conditions (95°F and above). When temperatures reach 95°F or higher, employers must implement High Heat Procedures, which include providing preventive cool-down rest periods of at least 5 minutes in the shade every 2 hours. This mandatory rest schedule is separate from regular meal and rest breaks and ensures workers can recover from heat exposure before illness develops.
Why the Other Options Are Wrong
Option A: Every 30 minutes
Every 30 minutes is more frequent than required by Cal/OSHA Section 3395 for the given temperature. While more rest would certainly help workers, this is not the code-mandated minimum frequency. The regulation specifies every 2 hours as the preventive cool-down interval at 95°F.
Option B: Only when requested by employees
Providing rest periods only when employees request them is a reactive approach and does not meet Cal/OSHA's preventive requirements. Section 3395 mandates proactive employer-scheduled cool-down periods — waiting for employee requests could mean workers are already heat-stressed before receiving relief.
Option D: Every hour
Every hour is more frequent than the Cal/OSHA minimum of every 2 hours but is not the specified minimum. This answer is a common trap because it seems like a reasonable middle ground. Cal/OSHA requires at least one cool-down period every 2 hours under high heat conditions (95°F+).
Memory Technique
Think '95 = every 2 hours.' At 95 degrees, the '9' and '5' add up to '14,' which doesn't help — so instead: '95°F triggers HIGH HEAT, and HIGH HEAT = 2-hour cool-down schedule.' Picture a timer set for 2 hours going off every time the thermometer hits 95°F.
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