Participants determine the BAC of four human blood samples. Samples ship in February. Review test info for special instructions for non-U.S. laboratories.
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Participants determine the BAC of four human blood samples. Samples ship in August. Review test info for special instructions for non-U.S. laboratories.

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Participants evaluate drugs/metabolites in human blood with case-like concentrations. Samples ship in September. Review test info for special instructions for non-U.S. laboratories.

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Participants evaluate drugs/metabolites in human urine with case-like concentrations. Samples ship in March. Review test info for special instructions for non-U.S. laboratories.

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Participants use simulator solutions of ethanol in water to evaluate their breath alcohol instruments. Samples ship in April.

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Participants use certified reference material dry gas cylinders to assess the calibration of their breath alcohol instrument. Samples ship in July. Available to U.S. laboratories only.

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