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'Infrequent' is an indistinct measure. One 'use' of marijuana may leave traces for several days. Repeated uses may extend the time before a user is completely free of drug residue. This will vary with the amount of the drug that enters the system and the persons metabolism.

So if someone smokes several joints on Saturday, they could possibly fail a drug test as late as the following Friday, maybe even later.

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14y ago

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