I went out for New Years and had about 10 coors light beers starting at 3:00 pm Saturday and ending at 2:00 am Sunday morning. I went in for a surprise ETG at 10:00 am Tuesday. This equates to a 56 hours window since my last drink and the ETG test. I am a male, 6'1" tall, 41, 210 lbs. I was eating during the time I drank. Also, it looks like they mailed my sample in a Fedex box along with others not that it matters. What do you think my chances are to pass?

Based on your size, the alcohol content of the drink (4.1%) and the time across which you consumed the 10 beers your BAC remained low and probably reached BAC=0 within two hours of last drink.

When converting to standard drink (US) your basic consumption totalled 8 drinks. (due to low % abv)

It sounds as though you will probably not show any EtG. That is because of your rate of consumption. While EtG is created during each drink it also begins the process of elimination, drink by drink. So within 4 hours of the first drink EtG began to decline. You also had almost the full time window from last drink to time of test to complete elimination of remaining EtG. The food also helped eliminating more alcohol in your stomach.

No one can foretell the elimination time for EtG (with precision) because each individual synthesizes and excretes EtG at different rates.