I only had THC in my system, as I am permanently disabled and have a medical marijuana card. No other substances. Driving pattern was good (not stopped for erratic driving).
No odor of marijuana, nor possession of any in vehicle.
I gave blood. Can someone please give me a scale of levels vs. impairment, etc.
When I get results, I want to know what they mean in layman's terms.
Blood THC levels do not correlate to a level of impairment in the way that alcohol does. Numerous factors apply and, while the prosecution may produce a Department of Justice toxicologist that will testify that high THC levels in the blood correlate with impairment, there are numerous studies that cast doubt on such claims, particularly for heavy users.
Asking what level of Delta 9 equates to impairment is a very loaded question, because different experts will testify to the fact that different levels may cause impairment in different subjects.
For example, some experts will testify that most people are impaired at a .05% blood alcohol level, while, others will say it's more like .07-.08%, but they all agree that .20% would be "impaired for the purposes of driving."
To be sure, you'd need a blood split to verify the levels and an expert to look over the levels and the case.
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