In short, yes you can fail a drug test after consuming d-9 products. A study by Mayo Clinic shows that THC is detectable in your urine at different levels and timescales based on usage amount and last use. Occasional users (up to three times a week): 3 days Moderate users (four times a week): 5 to 7 days Chronic users (daily): 10 to 15 days Chronic heavy users (multiple times a day): more than 30 days Source.