A construction site in Fresno has an ambient temperature 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 at least every 2 hours when the temperature equals or exceeds 95°F.
Why This Is the Correct Answer
Cal/OSHA Section 3395 requires that when temperatures reach or exceed 95°F, employers must provide preventive cool-down rest periods of at least 10 minutes at a minimum frequency of every 2 hours. These cool-down periods must occur in shade and are in addition to regular meal and rest breaks. At 95°F, the high-heat procedures are triggered, and the mandatory 2-hour cool-down interval is a key compliance requirement.
Why the Other Options Are Wrong
Option A: Only when requested by employees
Waiting for employees to request cool-down rest is not compliant with Cal/OSHA Section 3395. At 95°F, cool-down rest periods are mandatory and must be proactively provided by the employer every 2 hours—employees cannot be required to request them.
Option B: Every 30 minutes
Every 30 minutes is not the required minimum frequency under Section 3395. While more frequent breaks may be appropriate in extreme heat, the regulatory minimum at 95°F is every 2 hours. Selecting 30 minutes reflects over-caution but is not the statutory standard.
Option D: Every hour
Every hour is not the Cal/OSHA minimum frequency for mandatory cool-down rest at 95°F. The regulatory requirement is every 2 hours for a minimum of 10 minutes each time. Selecting every hour may seem more protective, but it is not what Section 3395 specifies.
Memory Technique
At 95°F: '10 minutes every 2 hours in the shade.' Think of it as the '10-2 rule for high heat'—10 minutes of shade rest for every 2 hours of work when temperatures hit 95. This is a specific, testable number under Section 3395.
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