Alcohol test - breath
Normal is when the blood alcohol levels are not elevated.
When one band is green, it means that the blood-alcohol level is 0.05% or lower. Two green bands mean levels of 0.05% to 0.10%. Three green bands indicate levels between 0.10% and 0.15%.
Barnosky AR, Chapman DK, Roth VS. Occupational medicine and cccupational health in the emergency department. In: Marx J, ed. Rosen’s Emergency Medicine: Concepts and Clinical Practice. 6th ed. St. Louis, Mo: Mosby; 2006:chap 199.