Rigpiggy,
Although .08 is a limit where things get sticky, in BC .05 can result in penalties.
Penalties starting at 0.05:
Quote: There's also a new warning range for impaired driving which drops the legal blood alcohol limit to .05, said de Jong. Drivers caught once with a blood alcohol level in the warning range — between 0.05 and 0.08 — will face an immediate, three-day driving ban and a $200 fine. Those caught twice in a five-year period face a seven-day ban and a $300 fine; and those caught three times over five years face a 30-day ban and a $400 fine.