A municipal water treatment plant manager is analyzing the flow rates of two main water pumps, Pump A and Pump B, over a 24-hour period to identify potential inefficiencies. The operational specifications require that neither pump should operate below 85% of its maximum capacity for more than 4 consecutive hours. Analyze the provided performance chart. ```mermaid gantt title Pump Capacity Utilization - 24 Hours dateFormat HH:mm axisFormat %H:%M section Pump A Below 85% Capacity :crit, 02:00, 5h Optimal Performance :done, after 02:00, 19h section Pump B Optimal Performance :done, 00:00, 10h Below 85% Capacity :crit, after 00:00, 3h Optimal Performance :done, after 10:00, 11h ``` Based on the chart and the operational specifications, what is the primary operational issue that requires immediate attention?