HB 1794 -- Drug Use by Employees Sponsor: Tilley This bill requires that a confirmation test for the presence of blood alcohol or a controlled substance be given to an employee who tested positive on his or her initial test. A positive result for the confirmation test for alcohol will be two-hundredths of 1% or more by weight, and a positive result for carboxy-tetrahydrocannabinol will be 15 nannograms per milliliter or more.Copyright (c) Missouri House of Representatives