Section R. 325.2672 - Tests; application; expression of results; filingRule 2.
(1) Tests to determine the presence or concentration, or both, of alcohol or other drugs, or both, may be applied to blood, urine, or other biological samples. Results of blood alcohol analysis shall be expressed in percent weight of ethyl alcohol (weight per unit volume) equivalent to grams per 100 milliliters. Results of urine alcohol analysis shall be expressed as weight per unit volume of ethyl alcohol, equivalent to either grams per 100 milliliters, or grams per 67 milliliters. Where applicable, results of analysis for drugs or other volatiles shall be expressed as weight per unit volume.(2) Serum or plasma alcohol concentrations shall be expressed as an equivalent whole blood alcohol concentration.(3) Tests to determine the concentration of alcohol may be applied to nonbiological samples. Results shall be expressed in percent volume of ethyl alcohol (volume per unit volume).(4) At least 1 copy of the written method or methods or techniques that are utilized in the laboratory shall be on file in that laboratory.Mich. Admin. Code R. 325.2672