Hi Incho,
I've certainly found I'm not at ALL a grammar geek since I've come here, because I don't do well with the types of questions you asked here, but use this as a model:
The student was found to have a mouse in his pocket. Same structure, but "above the permitted level of alcohol" is replaced with the simple word mouse. That seems like an object to me.
or if it were some candy - how much candy? some. how much alcohol? above the permitted level.
You can teach ME how to solve these things. I just know what sounds like good writing - I can't name the parts like you can.