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Question:

EPA regulations require that leaking commercial or industrial process refrigeration equipment must be repaired when the leak-rate exceeds ________ of the charge per year.

A 30%
Explaination

EPA regulations require that leaking commercial or industrial process refrigeration equipment must be repaired when the leak-rate exceeds 30% of the charge per year.
NEW LEAK THRESHOLDS BECAME EFFECTIVE JANUARY 2019: Leak rates for commercial refrigeration now cannot exceed 20 percent and cannot exceed 30 percent for industrial process refrigeration. The previous thresholds were 35% for both commercial refrigeration and industrial process refrigeration.