Response to Old Post re. Drug Testing

I don't know if I posted this response or not, but I have a divorce case at work where one spouse is seeking a drug test for the other spouse.

I spoke to a facility that does the hair test and they told me each 1/4 inch of hair will have evidence from 1 month....so if someone's hair is a couple of inches long, do the math...it seems like it stays in the hair for quite awhile...