This manual documents the AQDHS-II test run series and replaces the Air Pollution Training Institute Manual 475, Comprehensive Data Handling System, Volume 2, Air Quality Data Handling System (AQDHS-II). The test run series is divided into two major areas: basic test runs and ad hoc test runs. The basic test runs exercise each program in AQDHS-II at least once and provide the user with a means of determining whether or not his installation of AQDHS-II has been successful. The ad hoc test runs further exercise the capabilities of the AQDHS-II programs. The ad hoc test runs also provide the user with examples of how various combinations of AQDHS-II programs may be used to generate certain reports or to accomplish special tasks. The AQDHS-II User's Guide should be used as a reference in conjunction with this manual. Appendix A of this manual provides a cross-reference of tests, procedures, and programs.