There are a few strains out there that have very high CBDs and low THC.
There aren't any absent of THC however.
There are tinctures and other products that concentrate CBDs, but still have THC present.
Many drug tests use what's known as a "baseline".
Tests which indicate positive THC are only reported at levels above the baseline. Other results below the established level are considered negatives and reported as such. I would find out which lab in your area is contracted for service with your company, and investigate their testing methods and reporting standards. You may be able to consume and still stay at relatively low levels.
I have been in management for years and worked at facilities which tested at random monthly.
That being said, there are many synthetic and natural urine products which can be carried and concealed to assist you with random tests.
Most pre-employment screenings are hair or swabs, (both can be beat as well but require advance notice).
The urine screenings are usually the ones they use for randoms, since the cost is much lower than the other two and samples are easy to collect and store.
Good luck
