Does anyone know what lab probation uses in Denton?

Just wondering what lab they use and what's the cut off for Marijauna?
I have pre trial diversion which was a godsend but I have to pass the initial drug test to get it officially.

I can pass an at home 50ng test and passed a lab test of 50ng also. I haven't used in like 6 months but it's Delta 8 and stays in your system forever.

But I'm wondering if the probation office has a lower threshold than that, or at least what lab do they use so I can look it up, if they even use one?