Find Irving Park and Roselle Rd. on a map (just south of the Elgin-O'hare Expy.
Just south of that intersection (across the RR tracks) is the 3-way intersection of Roselle and Central Ave. Go west on Central a little over half a mile. Turn right (north) onto Presidential Dr. which is an entrance to a corporate / light industry park. Go all the way up to N Congress Circle (far as you can go) and turn left. The ABS is a couple buildings down on your right (north) side. If you miss the turn for Presidential then you get a 2nd chance a bit farther west turning in on Chancellor. You can follow that back to N Congress Circle and turn right. In either case you will pass the south leg of Congress Circle just after entering the corporate park. 514 N. Congress Circle is the address but you'll see the sign.
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