"THC concentration" means nanograms of delta-9 tetrahydrocannabinol per milliliter of a person's whole blood. THC concentration does not include measurement of the metabolite THC-COOH, also known as carboxy-THC.
RCW 46.04.586
THC concentration.
2013 c 3 s 3 (Initiative Measure No. 502, approved November 6, 2012).
Official source: Washington State Legislature. Reproduced from public-domain Washington statutes; confirm against the official source for the current text. Not legal advice.