I drink every night. I need to sign up for classes in which they will test me for alcohol. How long will it stay in my urine. Male, weigh 140 lbs. and have drinking heavily for years.

i drink every night. i need to sign up for classes in which they will test me for alcohol. how long will it stay in my urine. male, weigh 140 lbs. and have drinking heavily for years.

Allow 24 hours. What type of class tests for alcohol?