This is a non-personal services requirement to provide necessary to calibrate and maintain government owned Total Dissolved Gas (TDG) probes and temperature probes at Chief Joseph Dam on the Columbia River in Washington, Libby Dam on the Kootenai River in Montana, and Albeni Falls Dam on the Pend Oreille River in Idaho. In addition, the contractor will provide assistance deploying and retrieving equipment used for water quality research studies (such as temperature/nitrate loggers) for USACE, Seattle District. The contractor will provide all personnel, equipment, supplies, facilities, transportation, tools, materials, supervision, and other items and non-personal services necessary to perform the Total Dissolved Gas and temperature probe tasks contained in the Performance Work Statement (PWS).