Note that the largest source of fugitive hydrocarbons is parked motorcycles, because 1) CARB estimates that about 30% of bikes in the state have had their evap canisters removed, and 2) even the ones that still have their canisters can't work for more than about 7 days, so a motorcycle that doesn't have the engine started for more than a week leaks as much fuel as one that never had California emissions equipment in the first place.
