We received advice from a forensic toxicologist with respect to that cut-off level. Various workplaces in Canada will utilize different ranges: some use five nanograms, and I know some are looking toward one nanogram. From our perspective, given the absence of legislation and given the inconsistent arbitral jurisprudence and what would apply in our case, we felt that was the most appropriate number that could assure us, based on the advice we were receiving, that an oral fluid swab would determine impairment at the workplace.
On September 27th, 2017. See this statement in context.