A construction site in Fresno is experiencing temperatures of 95°F with 60% humidity. According to Cal/OSHA heat illness prevention requirements, what is the minimum frequency for providing preventative cool-down rest periods?
Correct Answer
C) Every 2 hours
Cal/OSHA Section 3395 requires preventative cool-down rest periods at least every 2 hours when temperatures exceed 95°F, regardless of humidity levels.
Why This Is the Correct Answer
Cal/OSHA Section 3395 requires employers to provide preventative cool-down rest periods at a minimum frequency of every 2 hours when temperatures reach or exceed 95°F. This requirement applies regardless of humidity levels — the 95°F threshold alone triggers the mandatory rest period schedule. Workers must be allowed to rest in shade until they feel well enough to return, with a minimum duration of 5 minutes per rest period.
Why the Other Options Are Wrong
Option A: Only when requested by employees
Providing rest only when requested by employees is insufficient under Cal/OSHA Section 3395. At 95°F+, the employer must proactively schedule and provide cool-down periods — the burden is on the employer, not the employee. Workers experiencing early heat illness symptoms may not always self-report, making employer-driven scheduling essential.
Option B: Every hour
Every hour is more frequent than the regulatory minimum but is not the answer specified by Cal/OSHA Section 3395. While more frequent breaks would be safer, the exam asks for the regulatory minimum as written in the standard, which is every 2 hours.
Option D: Every 30 minutes
Every 30 minutes is not required by Cal/OSHA Section 3395 as a general minimum. This frequency might be advisable in extreme heat conditions but is not the regulatory minimum threshold. Selecting this answer overreads the standard.
Memory Technique
The '95/2 Rule': at 95°F, cool-down every 2 hours minimum. The numbers rhyme with a phrase: 'Ninety-five, break to survive, every two.' Humidity is a distractor — the trigger is temperature, and 95°F is the magic number in the Cal/OSHA heat standard.
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