[en] The Engineered Alternatives Task force recommends six basic waste forms for inclusion in the WIPP Experimental Program. In addition, nine variations of the waste forms are recommended for a total of 15 waste forms. Also, combination of these 15 waste forms with three recommended backfill alternatives should be included in the WIPP Experimental Program. The goal of the Engineered Alternatives Task Force (EATF) is to recommend engineered alternatives for the TRU waste forms and/or WIPP facility design that could facilitate the demonstration of compliance with the EPA performance standards. As part of this goal, the EATF committed to early preliminary recommendations of alternative waste forms that could be incorporated into the WIPP Experimental Program. This report provides those preliminary recommendations due March 1990, as depicted on the EATF Summary Schedule. 5 tabs