EPS foam blocks (Styrofoam) ARE recyclable, in Portland, Oregon. Recycling, of clean material only, is a service of Pacific Land Clearing, at three of their four locations in metro Portland.
This Bee Newspaper review, tells the story, as of June 4, 2008, with info on what PLC does with the styrofoam. Reported options include a volunteered service of the seasonal Moreland Farmers Market, which brings a weekly collection to PLC.
I find styrofoam stored in attics, often. Stored. Not really doing any good as insulation, where air freely seeps under. I collect material in a 55-gallon drum liner, and when full, make a trip to a PLC location. I want my city to require all recycling centers to accept material, and bring it to PLC. As noted in The Bee, the mindset that styrofoam must go with trash, is hard to undo.
Every city should look for means to consume styrofoam as done by PLC and as described in The Bee.