Flumes offer distinct advantages over sharp-crested weirs: 1  For the same control width, the head loss for a flume is about one-fourth of that needed to operate a sharp-crested weir. 2  The velocity of approach is part of the calibration equations for flumes.
How long does alcohol stay in your system saliva tests - How long does alcohol stay in my system for a saliva test? Depends. Alcohol has an approximate detection time of 12-24 hrs, The detection time depends on the maximum level of blood alcohol content (BAC) which can vary. One serving of alcohol can be fully absorbed in the blood stream 30 min up to 2 hrs after intake. The body metabolizes aprox 0.25 oz per hour.
The EtG Urine Alcohol Test. With some urine alcohol tests, alcohol can be detected up to around 48 hours after a person has ingested alcohol. With the EtG Urine Alcohol Test, however the presence of EtG in the urine demonstrates that ethanol alcohol was ingested within the past 3 or 4 days, or roughly 80 hours after the ethanol alcohol has been metabolized by the body.