What evacuation level does Table 1 require?

Recovery requirements · EPA 608 Type II. The correct answer, and the reasoning behind it.

Evacuation levels by charge size and equipment date, major repairs, and system-dependent limits.

The question

An appliance charged with R-508B is being sent for disposal. The only recovery machine on site was manufactured in 1991. What evacuation level does Table 1 require?

• A4 inches of Hg vacuum
• B0 inches of Hg vacuumCorrect answer
• C10 inches of Hg vacuum
• D25 mm Hg absolute

Why “0 inches of Hg vacuum” is correct

Disposal triggers the same Table 1 levels as opening the appliance. R-508B is a very high-pressure refrigerant, and that row is 0 inches of Hg vacuum for both pre- and post-November 15, 1993 equipment.

Source: 40 CFR 82.156(a), Table 1; 40 CFR 82.152

Why the other answers are wrong

• 4 inches of Hg vacuum — No very high-pressure row allows or requires 4 inches; the older-equipment column still reads 0.
• 10 inches of Hg vacuum — 10 inches applies to certain medium- and high-pressure appliances with newer equipment.
• 25 mm Hg absolute — 25 mm Hg absolute is the level for low-pressure appliances such as R-123 chillers.

Practice more of this

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