Sounds like you will need to use several approaches.  I would use my shop
vac to remove the majority of the bees before they have time to get an
established nest.  I have a special shopvac which captures the bees in a
box prior to entering the vacuum.  I would combine these with a new queen
and write off the other unless I happened to find her and collect her in
good shap.
 
I would place a bee escape over the entrance to allow bees to exit but not
return, the bees collected from inside with a queen would be placed in
proximity to the entrance as a bait hive.  Many of the bees will eventually
drift to the new position after it is obvious they are not getting back in.
 
finally I would kill any bees remaining (after a period when I felt I could
not gety any more) and seal the entrance to prevent a repeat occurance.
 
Hope this helps  Cheers  Mike
 
>Bee-listers,
>
>I went up into an attic tonight to inspect a swarm that moved into its new
>quarters over the weekend.
>
>The swarm has set up housekeeping in the attic space near the chimney, with
>the entrance where the chimney meets the eaves. Great location, nice and
>warm.
>
>While in the attic, I can see the upper part of the swarm but it was a foot
>out of reach, wedged in between the ceiling and sloping roof rafters.
>
>As in all swarm removals there are 3 choices:
>
>1. Remove the outside wall = stucco.  Not an option at this time.
>
>2.  Destroy with soapy water.  Owner is very understanding about the
>diminishing bee population and would like to save them,  Also she has heard
>of a Chinese proverb that states "Bees in a house = a  house that is
>blessed".  Where did this saying come from?
>
>3. Bait the swarm out.
>
> ATTIC APPROACH.  Would a few frames of brood placed near the swarm entice
>them to move  away from their newly formed comb? (They have only been there
>since 5 days ago)
>
>OUTSIDE APPROACH.  Use a bait hive and wire screen funnel to remove most of
>the field bees.
>
>Any input into this project would be helpful.
>
>Paul Cronshaw DC
>Cyberchiro and Hobby Beekeeper