Question about thresholds

From what I gather, most pre-employment drug screenings require 50nl per 60ccs of urine in order to declare a person is positive. I've also heard that someone who has a habit using about a joint a day or maybe a bowl of good shit a day will be about 100nl/60ccs in their urine. So if someone only takes one or two hits when they smoke, and they smoke once a day, wouldn't they be likely to be under the 50nl threshold, even if given a test the very next day? Aldo, if anyone has information about how your nl per cc level drops when not smoking for consecutive days, that would be useful. For example, if someone is 100nl/60cc one day, and they don't smoke, would they drop to something like 90nl/60cc the next day?

Ok, let me clarify, I was a bit confused about the terminology. What I mean to say instead of nl per cc was ng per cc, nanograms per cubic centimeter, or ng/ml since one milliliter equals one cubic centimeter.

B4B, sorry not to see any answers on this b/c that is a good question- i

am curious too if someone smokes one day every month, 4-5 small hits of good hydro, how much (on average) thc metabolite (ng/ml) would be in their urine the day after

there is a somewhat interesting thc calculator

Online THC Calculator

but there are a lot of factors to consider

I use to test myself and if I smoked lightly in the evenings for 3 nights it usually took me 4 days to pee clean. But it varies widely for everyone. Your best bet is to buy some cheap strips off ebay and test yourself.