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1 hit but there is more to it then that, in order to fail a drug test you must reach more then 50 nanograms of delta 9 tetra cannabinol or thc. A couple hits a week can't bring your levels that high. If you smoke a a few bowls you'd be up in the 100-200 nanograms range for at least 2 weeks. Cannabis has the longest half life of all illegal drugs if your being tested just stay clean

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11y ago
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Q: How much THC does it take to stay in your body for more than 3 days?
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