The Gulf of Mexico Air Quality Database (GMAQDB) is a custom software application developed by Air Resource Specialists, Inc. (ARS) and ICF International under MMS contract 0106CT39773. This Technical Reference Manual (TRM) provides the information needed by database administrators, software developers, and other IT professionals to facilitate the installation, maintenance, and use of the GMAQDB. The development platform chosen was based on the Statement of Work authorized by MMS. No additional technical requirements were provided. Therefore, development decisions were made to provide a useful tool for MMS data analysts within the simple constraints of developing an application with an Oracle database backend and Microsoft Access 2003 interface.