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The EtG test may detect alcohol use up to 80 hours after stopping the alcohol. In reality, the vast majority of people will become negative well before 80 hours, usually within 48 hours. But if someone wants certainty that they will pass an EtG test, it would be appropriate to be concerned for up to 80 hours after the test.
If you stopped alcohol intake at midnight on 10/7, then any test on the afternoon of 10/11 will be past the 80 hour window, so there is no reason for concern in that situation.