The report describes an initial source assessment environmental test plan, developed to investigate the fate of various constituents during coal gasification. The plan is an approach to the problems associated with sampling point selection, sample collection, and sample analysis which is based on a HYGAS-type process. The report includes a general process description, process steps, effects of operating conditions, sampling, analytical methods, and significance of results. In order to be implemented, this environmental test plan would have to be integrated into the operating program of a specific facility. Although this integration has not taken place, it would be a next step toward data acquisition.