It takes me at least 30 days before I can pass using dilution, 60 or so to really be clean.

I am your height, and 160 ar so. Is the 115 a typo? I would think that if that is correct, you should be clean way sooner than me.

It only costs 15 bucks to walk into a collection center and do a thc test. There are no records kept, and they will tell you your levels if you fail.