How long does Valium show up in urine screen?

I took (3) 10mg Valium on Wed at about 5pm. I had a urine test on Wed, 1 week, exactly 7 days, at 9am. The test came back positive for benzodiazepines. Valium can remain detectable in urine for up to 14 days. Water of course helps with any drug in your system but the body is very slow at clearing Valium from the system.

I took 59 Valiums in two days and drank 4 gallons of water before a drug test and passed it just three days later