B09_-_Attachment_15_-_HMI_1_0001.jpeg

This image depicts a wastewater treatment facility control system interface displaying a "Headworks Influent Flow Historic Trend Graph." The screen shows a real-time monitoring dashboard with a line graph tracking influent flow rates over time, with the X-axis marked in 15-minute intervals and the Y-axis displaying flow measurements ranging from 0.0 to 280.0 units. The current reading is displayed as "000" in a green indicator box.

The interface provides navigation controls at the top of the graph and includes a menu system at the bottom with multiple functional modules. The primary menu options include Main Menu, Headworks Info, Aerator Overview, Plant Control, Process Overview, Sludge Pumps, Backwash Control, Control Valves, and Alarm Display. Additional graphing options are available for different operational parameters, including Graph Inf Flow, Graph F1 DP, Graph F2 DP, Graph F1 NTU, and Graph F2 NTU. This appears to be a supervisory control and data acquisition (SCADA) system used for real-time monitoring and management of wastewater treatment operations, allowing operators to track influent flow patterns and access various treatment process controls from a centralized interface.