off-site

from WordNet (r) 3.0 (2006)

off-site
    adj 1: taking place or located away from the site; "an off-site
           waste treatment operation" [ant: {on-site}]

from The Collaborative International Dictionary of English v.0.48

off-site \off-site\ adj.
   Taking place or located away from the specified site; as, an
   off-site waste treatment operation. Opposite to {on-site}.
   [WordNet 1.5]