STOMP is a numerical simulator, developed by PNNL, for solving problems involving multi-fluid coupled flow and reactive transport in geologic media. The code has been under development at PNNL for more than twenty-five years. This release of STOMP will allow users to directly access the software, and will be limited to selected operational modes. The initial release will include STOMP-W. Additional operational modes will be released depending on market trends and user needs.