This is a summary report on the preliminary test work performed in conjunction with the development of the commercial concept design of the coal preparation unit for all five coal gasification processes, using western coal. The purpose of the test work was to obtain preliminary information that would assist in the equipment selection for the different coal preparation flow sheets for the five different coal gasification processes. Here are the main reasons why this test work was necessary. Coal grinding or drying information from the pilot gasification plants is not necessarily pertinent to a commercial size plant. Therefore, the coal preparation equipment in the pilot plants will not necessarily scale up to meet the higher capacity requirements of the commercial plants. There is very little equipment manufacturer experience in grinding and drying western coal. Certain coal characteristics, such as grindability and the resulting particle size distribution of the ground product, which are peculiar to each individual coal are determinable by test work only. The work was performed by four manufacturers of drying and grinding equipment at their testing facilities. The coal sample used as feed for the tests was 1/sup 1///sub 4/ x 0 inch Rosebud coal obtained from Western Energy's Colstrip mine in Montana. Because of the limited scope of this program, the results of the tests should be regarded as only preliminary at this point, although they may be used as a guide in preliminary design work or to plan future test work. A summary of the results of the tests performed by each equipment manufacturer is given.