Sampling and analytical methodologies are needed by EPA and industry for testing stationary sources for specific organic compounds such as those listed under the Resource Conservation and Recovery Act (RCRA) Appendix VIII and Appendix IX and the Clean Air Act of 1990. A computerized directory, Problem POHC Reference Directory, has been developed that supplies information on available field sampling and analytical methodology for each compound in those lists. Existing EPA methods are referenced if applicable, along with their validation status. At the present, the data base is strongly oriented toward combustion sources. The base may be searched on the basis of several parameters including name, Chemical Abstracts Service (CAS) number, physical properties, thermal stability, combustion rank, or general problem areas in sampling or analysis. The methods directory is menu driven and requires no programming ability; however, some familiarity with dBASE III+ would be helpful.