This is done through the SAW website @ https://secureaccess.wa.gov/
I had created a "freegeekseattle" account last year, and submitted us to be an "Electronics Products Recycler" through the Dept. of Ecology. Apparently the application never went through?
I re-submitted today and the application is currently in pending status.
Once approved, we should appear at https://fortress.wa.gov/ecy/recycle/UISearch/ServiceSearch.aspx