Have drug testing questions? Get answers from Experts
Hello from JustAnswer.
It is impossible to say whether you will pass an EtG test 38 hours after consumption of 4 tall light beers. It can be said that you may pass, as many people will only have a positive EtG for about 24 hours after last consumption. However, there are also a fair number of people that can have a positive EtG test for 24 - 48 hour after last consumption.
Although the EtG test is stated to detect alcohol consumption up to 80 hours after last drink, it is actually very few people that will be positive past 48 hours.
So, at 38 hours, there is a good chance that you will pass, but it is impossible to predict with any amount of certainty.
If I can provide any additional information, please let me know.