It is most likely the clutch master.  BTDT.

You shouldn't delay this repair very long, as brake fluid eats paint
(attacking your floor under the carpet) and is hygroscopic, that is, draws
water from moisture in the air and therefore is a rusting accelerator.

Fichten

>
> Art McGinn wrote:
>
> >   ever since i got it a year ago, there has been fluid (brake, i assume)
> >showing up on the steering column near the clutch pedal on our '82 westy,
> >suggesting a leak up there in the fluid holding  tank. i just poured in
> >another 8 ounces to refill it.  this is the second time i have needed to
> >refill the reservoir since i got the van. the brakes work fine. on the
> >clutch, i have a vague suspicion that there is some air in the system
(are
> >there two different systems, one for clutch and one for brakes, in this
> >setup? both drawing from the same fluid reservoir?).  but the clutch
> >otherwise works fine too. the question is: are we looking at replacing
the
> >whole clutch master cylinder here or could there be a less drastic
solution
> >to plugging the leak?  it's hard to tell the exact source of the escaping
> >fluid? alas, i am no mechanic and so must always go to someone who is.
tia.
> >art
> >
> >
> >