I can sympathize as I've been in your shoes exactly several times. My first thought is, what will it accomplish in confronting him about it? It won't make you feel any better, no matter what he says.
Part of alcoholism is lying to protect it. For the longest time I was SO offended that my husband would lie to me about it, to the point of endangering himself and others. I NEVER knew him to lie before he became an A. His skill at it now gives me chills. But I don't feel so offended at it anymore. It's part of the disease. I see that he will protect alcohol consumption at any cost.... he's not really trying to spite me.
I do let my AH know that I know what he's doing (sometimes I do it the "right" way, and sometimes I do it the codie way, lol). He once told me after a big relapse that I should always let him know I know, no matter how he acts in response, because he needs the reminder he's not fooling the people around him.
Hugs....