Content
# RAS Strategy.pdf
> [Open in Google Drive](https://drive.google.com/file/d/1HEkcxvUtXp1EB_D0Ad6RigcAWiU09sqh/view)
This document details the control strategy for Return Activated Sludge (RAS) pumps at the Cambria CSD wastewater treatment plant upgrade. It describes the operation of variable speed submersible RAS pumps, their flow measurement, and coordination with secondary clarifiers and waste activated sludge (WAS) pumps. The file also outlines operator controls available at field locations, electrical rooms, and SCADA/PLC systems, including manual and automatic modes, alarms, and monitoring features for pump performance and fault conditions.