Amadd wrote on May 20
th, 2010 at 4:55pm:
Quote:There are quite a few professions where I agree with mandatory drug testing..airline pilots for instance.
I could understand airline pilots being tested to a degree, however, there are other tests available which don't involve taking body samples and which can assess the suitability to take charge of an aircraft far better than a "one size fits all" drug test.
You mean computer based impairment testing? It doesn't work.
Drug and alcohol testing in the workplace serves one purpose only - as a deterrent. It's not the primary method of detecting impairment. The primary method is observation by peers.
The number of casualties on the road in Australia in 1974 was around 3800. By 2001, that figure had halved while the number of cars on the road had doubled.
The reason - people changed their attitudes to drinking and driving.
If you look at the trends, you can see where RBT was brought in in the various states.
What drug and alcohol testing doesn't do is to test for impairment.
A baseline study was conducted on pilots using a flight simulator. None had been drinking. The errors rate was 10% (the criterion was task completed without error). After 6 standard drinks, and a blood level of around 0.1, the error rate increased to 89%. After a rest period of 14 hours and no further drinks, the alcohol levels had dropped to below the detection limit. At that point, the error rate was 68%. If anybody wants references to the study, I can provide it.
The conclusion is that blood alcohol level is not a guide to impairment level.
Do I think that drug/alcohol testing should be required for high risk workers? Yes, as a deterrent.
At my place of work, we conduct random testing. It's totally random unless a positive result is obtained. That person is then subjected to targetted testing for a period of time.
We also do pre-employment medicals which include blood based drug testing. Even if not impaired, traces of THC indicate a possible drug habit. Anybody returning a positive result is denied employment because they are not considered worth the risk of employment.
An an example our criteria for a negative result are alcohol - zero detected and THC <4 ng/100ml.
The drug testing includes Cocaine, THC, benzodiazepines, amphetamines and Opiates.
Our last work based injury was in 2004. It's a high risk industry.