Specifications include, but are not limited to: 1) Site remote unit shall accept analog DC voltages from one or more monitors, scale, average, store, and transmit the data to the Central computer upon request. Data shall be stored at the site in battery-backed RAM to prevent data loss from failure of any rotating magnetic media. Media shall support storage of up to 365 days of hourly data for up to 99 parameters. 2) Site remote unit shall provide diagnostics to check storage media for errors or faults. 3) Storage media shall be expandable to support storage of thirty (30) days of oneminute resolution data for 99 parameters. 4) The system responsible for signal digitization, scaling, averaging, and storage into the first storage media must be designed such that an unexpected power failure cannot cause a lock-up condition, storage media corruption, or loss of any previously stored data.