3. Unit #6 (Design/Engineering) - NOx Burner Modifications involved the addition of four (4) SOFA air dampers, four (4) LOFIR air dampers, two (2) CO monitors, six (6) O2 probes, one (1) Reheat Spray Valve, one (1) Reheat Block Valve, one (1) Reheat Spray Flow transmitter, one (1) Superheat Block Valve, one (1) Superheat Spray Flow transmitter, four (4) new drives for the mill exhauster dampers and four (4) new drives for the mill coal air dampers.  4. Chemistry Lab (Design/Engineering) - Upgraded the chemistry monitoring laboratory environment system which utilizes in-line process analytical instruments for the desired chemical analysis of multiple sample streams from each of Riverbend Steam Station's units (4). Individual sample streams are selectively sequenced to the respective analyzers using DCS controlled multi-port manifold solenoid valves. The Cation Conductivity signal from each sensor is multiplexed via relay/WDPF logic to provide alternating input to each unit Specific analyzer.