I think you will find that even those who do not drink alcohol at all will have a very small amount present due to normal metabolic functions. A figure of up to 5mg/100ml springs to mind.
Somewhere is the region of 15mg/100ml alcohol per hour is broken down by healthy liver function.
Therefore up to 5 units [ the recommended maximum ] of alcohol should be removed by the liver prior to duty which is consumed in the preceeding 8 to 24 hours, with no alcohol intake 8 hours before work.
Last edited by ecj; 19th Jun 2003 at 22:55.