Mailboxes, Etc. is connected into some national styrofoam recycling
program.  They will take styrofoam (peanuts, sheets, packing, etc.)
and recycle it into sheet packing material which Mailboxes, Etc. later
uses. Some locations will be less willing to take the material because
of storage space limitations, so please call and make sure that the
branch nearest you will accept your material.  The Monroeville branch
is rather large, so they would even take my slabs.  The number for
the Monroeville branch is 856-9818.