Engine : Expired / Refrigeration AC - 577/252
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| EPA Clean Air Act rules permit refrigerant to be released to the atmosphere under which of the following conditions? |
| A) when testing a system for leaks using R-12 and nitrogen |
| B) when release is considered 'de minimis' |
| C) when adding oil to a compressor |
| D) during replacement of a compressor |
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