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What do I do with contaminated refrigerant? Contaminated refrigerant requires special handling and special record keeping.  Make sure you follow these guidelines to the letter –if you don't you could be exposing yourself to potential EPA Air Conditioning Frequently Asked Questions Air Conditioning FAQ A/C Systems and Service Refrigerants Contamination EPA A/C Organizations A/C Systems and Service What is an air purge system? An air-purge Air Conditioning Frequently Asked Questions "The Full Story" Air Conditioning FAQ A/C Systems and Service Refrigerants Contamination EPA A/C Organizations A/C Systems and Service What is an air purge system? An air-purge