But Ernest Noble, a biological psychiatrist and UCLA research professor who testified on behalf of the San Onofre workers, counters that the data in the pilot study was "extremely fallacious." Noble maintains, among other things, that standard scientific controls, such as using placebos to ensure blind testing, were not used in the study.
"The purpose of the San Onofre drug-testing program, in my view, is to scare the hell out of both the workers and the public," Noble said.
TEN MOST FREQUENTLY SCREENED DRUGS Marijuana Cocaine Amphetamines Opiates Barbiturates Phenecyclidine (PCP) Methaqualone (Qualuude) Benzodiazepine (Valium) Propoxyphine (Darvon) Alcohol \o7 Source: Martha Harkey, research pharmacologist, UC Davis School of Medicine.\f7
With the exception of marijuana, all of the listed substances remain in the body at detectable levels for three to five days. However, inactive waste products of marijuana may remain in the body for up to two weeks, and in some cases, for as long as several months.
Marijuana accounts for 80% of all positive results, while cocaine accounts for 10% to 15% of all positive results.