Labs use only the last 1-1/2", which represents 90 days.
Sure, rumors abound about how much hair and how far back the test looks. Staying clean for six months is a good thing. And the lab tech can use hair from any part of your body, including pits and chest.
Here's Trucking Truth's take on this: Hair Follicle Testing Methods and Facts
Best of luck!
A CDL is required to drive any of the following vehicles:
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Hi all.
I’m new to the forum here. Back in November I quit smoking cannabis and decided to get my CDL. Passed the DOT UA in December, went to school January to March, and obtained my CDL about 2 weeks ago.
I want to underscore that I’ve been clean for 5-6 months and plan to stay that way. I like driving a truck and see myself making a career of it.
The problem is that I normally shave my head (I have a skin condition that makes the presence of hair on my head very irritating). Body hair can read dirty for a year after last use.
If I grow my hair out for 3 months, I’ll be able to pass a hair follicle test; I’d like to be driving before then, but by that point, I’ll have been out of the truck longer than I was in school and I don’t what skills I’ve acquired to atrophy in that time. Are there any companies that hire new drivers based only on a DOT UA?
Can anybody point me in the right direction? Any help in turning my life around would be greatly appreciated.
CDL:
Commercial Driver's License (CDL)
A CDL is required to drive any of the following vehicles:
DOT:
Department Of Transportation
A department of the federal executive branch responsible for the national highways and for railroad and airline safety. It also manages Amtrak, the national railroad system, and the Coast Guard.
State and Federal DOT Officers are responsible for commercial vehicle enforcement. "The truck police" you could call them.