"3.5 Hair testing
When THC metabolites are in the blood, they go through the blood vessels
in the head, and get ltered through the hair. THC metabolites remain in
the hair as a permanent record. The hair test costs several hundred dollars
($150-300) and is rarely given because urinalysis is cheaper (approximately
$65) and more accurate. (The hair test equipment and setup goes for over
a million). According to Je Nightbyrd, hair tests are "widely used in the
casino industry." They cut 50 strands of hair from the scalp, and send it in
3.5. HAIR TESTING 23
to the testing lab where they liquefy it. "A hair sample is disolved in a series
of solvents which extract the drug metabolites and then are analyzed via
GC/MS." It can take from several hours to days just to extract metabolites.
Average hair grows 1/4 inch per month. Typically they just use hair one and
a half inches from the scalp; though some labs will take enough to test for up
to 3 years. The liquid is run through the most sensitive GC/MS machines
available, and can detect as little as 1 ng/mL! The hair test discriminates in
that detection is easier in dark hair. Colored people may be discriminated
against further because melanin is in their hair, which can be mistaken for
THC. However, there is con
icting data as to whether melanin can be detected
as THC."
---Fooling the cops: the complete drugtesting guide.pdf
I recently did a hair test for a casino and I got the job so they either dont care or didnt find anything. I quit smoking about 4 months before the test give or take a month. I went in thinking they were going to take a strand of my hair and the took a regular finger length haircut snip.
"Substance Screening GC/MS Confrmation/Cutoff
Amphetamines 500/ 500
Methamphetamines 200/ 500
Barbituates 200/ 100
Cocaine 150/ 150
Marijuana 5/0 15
Opiates 1 300/ 300
Phenyclidine 25/ 25
All cuto levels are in nanograms/mL
2.3Passive smoke and positives
"Second hand marijuana smoke in a car can cause you to fail the next day"
(Nightbyrd). It is possible that second hand [marijuana] smoke will raise
someone to the 50 ng/mL level; however, extreme exposure is required.
For instance, a closed car full of pot smokers and a non-smoker may render
the non-smoker positive for both urinalysis and the hair test, provided that
they are sealed in the car for a while. The Army did a case study where
volunteers were put in a room pumped full of smoke for an hour, ve times
daily. Subjects started testing positive after the second day. The non-smoker
would have to take in virtually as much second hand smoke as a smoker
inhales. Non-smokers are safe in a ventilated area, as long as they don't get
a hair test. According to Clinton, simply blowing crack smoke on ones hair
may cause a positive hair test. Second hand pot smoke doesn't aect the
hair test results as much as crack smoke does mainly because exhaled smoke
contains no THC. The only pot smoke that contains THC is the smoke that
hasn't entered the lungs.
for some reason the f's are squares but I changed some????????