With the development of the Volatile Organic Sampling Train (VOST) Protocol (February 1984) to measure organic emissions from hazardous waste incinerators, a wide variety of compounds have been collected and analyzed. Because its use is currently being recommended by regulatory agencies to measure emissions for compliance determinations, the VOST Protocol was subjected to a methods validation study. The paper documents the results of the VOST field test validation. Because of the variety of organic compounds to which this method will inevitably be applied, the almost unlimited number of permutations that could be conceived made a comprehensive validation impractical. Nevertheless, five organic compounds with boiling points in the approximate range of 30 to 100 C were chosen to be used in the validation study. They were: trichlorofluoromethane, chloroform, carbon tetrachloride, benzene, and tetrachloroethylene. The paper discusses the sampling and analytical results when those five compounds were spiked into and collected from the gas stream of a hazardous waste incinerator. Precision as measured by Relative Std Deviation was less than 5%. Accuracy as measured by % recovery was above 90%.