Correct, ETS/ETG testing is accurate up to 80 hours after alcohol consumption. You can also fail the test for many household items, Nyquil, mouthwash containing alcohol, repeated use of hand sanitizer, certain foods can also produce a positive on the ets/etg test. Look up ets/etg testing on google, I'm sure you can find more information there, including a list of things that will cause false but true positives.
