How far back does CRST hair follicle test go?
CRST doesn't do Hair Test.. Unless of a fatal accident where someone passes away. Depends on the length of hair being tested. You would need 3 inches for 6 months. via
Does PTL Trucking do hair follicle test?
PTL requires urinalysis and hair follicle drug testing. Neither test is random during orientation. via
Can a hair drug test go back 9 months?
A hair sample taken from a different part of the body where hair grows more slowly may have a detection window of up to 12 months. via