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The Washington apple industry uses regular cold storage for short-term storage, and Controlled Atmosphere (CA) storage for longer storage. Regular cold storage is used for most of the fruit marketed in the fall and early winter. Controlled atmosphere storage technology makes buying apples all year possible, because the ripening process is slowed down further. CA rooms are sealed, airtight, refrigerated rooms in the warehouse in which the levels of oxygen are reduced to 1-2%, and temperatures are maintained at 32-36° F. Humidity is regulated at 95%, and carbon dioxide levels are also controlled.  Most apples are stored before being sorted and packed for market.

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