Susan, for info on accreditation standards, try the following links.  Erie Community College has several programs that are reviewed periodically by accreditation team visits.  I was looking for help in weeding the collection.  Thanks to the WWW, I was able to find guidelines for some programs.  Indeed, some guidelines are so vague as to be useless.  I always ask for faculty input, but they don't know how long things should be kept.  People who can't throw anything out also can't tell me to discard any periodicals.  I have asked accreditation team members for advice when all else has failed.  Team members have been incredibly knowledgeable about library materials in their disciplines.  I realize that you might want answers before they show up!  Another trick I use is to search library home pages of similar institutions.  Most have periodical holdings lists online and that is a goldmine of information for me.  You can identify good, up-to-date serials collections that support similar programs, and then see what subscriptions they have.
http://www.aspa-usa.org/
Association of Specialized & Professional Accreditors
http://www.abet.org/tac1.html
Accreditation Board for Engineering and Technology, Inc.
http://www.ala.org/ala/acrl/acrlstandards/standardsguidelines.htm
Association of College & Research Libraries

Katherine H. Hill
Library Department Chair
Circulation/Periodicals Librarian
D112, Dry Memorial Library
Erie Community College, North Campus
6205 Main St., Williamsville, NY 14221
(716) 851-1278