I would not suggest trying to fight this without a lawyer's help.  However, there are some technical rules that the police have to follow, to use breath test evidence in court, and you might have an outside chance, with qualified counsel.  One place to look for the lawyer you need is our website, http://attorneypages.comNeither you nor I have the scientific training needed, to say just how much lower your BAC was when you were stopped.  And even that is not the end of the story, since you can sometimes be found guilty of a DWI/DUI offense even without being "over the limit."