1. SCADA City of Phoenix Water Services Department Presented by Rico Diaz July 15, 2004

2. City of Phoenix Water Services Department Five Water Treatment Plants Five Water Treatment Plants Two large Wastewater Treatment Facilities Two large Wastewater Treatment Facilities One Water Reclamation Plant One Water Reclamation Plant Over 220 Water Distribution Sites Over 220 Water Distribution Sites 24 Lift Stations, 16 Metering Stations 24 Lift Stations, 16 Metering Stations

3. City of Phoenix Water Service Area Map 4 1 2 3 5 6 7 1) Verde WTP 2) 24 th Street WTP 3) Deer Valley WTP 4) Val Vista WTP 5) Union Hills WTP Cave Creek WRP 6) 23rd Ave WWTP 7) 91st Ave WWTP 8) Distributions SCADA 8

4. Water Treatment Plants

5. Remote Facilities

6. Wastewater Treatment Plants

7. SCADA SYSTEMS A SCADA system is utilized at each facility to monitor and control the process A SCADA system is utilized at each facility to monitor and control the process Total of eleven systems Total of eleven systems Seven different vendors Seven different vendors Five of the systems are in the Distributed Control System category (DCS) Five of the systems are in the Distributed Control System category (DCS) Water Distribution has over 220 RTUs Water Distribution has over 220 RTUs

8. HMI/CONTROLLER DCS HMI/CONTROLLER DCS

9. HMI/CONTROLLER

10. I/O DEVICES Flow meters, power meters, temperature Flow meters, power meters, temperature Analytical instruments ( D.O., Chlorine ) Analytical instruments ( D.O., Chlorine ) Variable frequency drives (VFD) Variable frequency drives (VFD) Motor start/stop, valve open/close Motor start/stop, valve open/close Motor run status Motor run status Overload and alarm status Overload and alarm status Tank levels Tank levels

11. SCADA Functions Auto pump pacing, level control, monitoring and alarming Auto pump pacing, level control, monitoring and alarming Process trending and recording Process trending and recording Flow control and flow pacing Flow control and flow pacing Pressure control Pressure control Chemical feed control and monitoring Chemical feed control and monitoring Process alarm notification Process alarm notification

12. Benefits of SCADA Reduce electrical and chemical costs Reduce electrical and chemical costs Essential for maintaining regulatory compliance Essential for maintaining regulatory compliance Reduce operational man power Reduce operational man power Facilitates efficient management of capacity in the water distribution system Facilitates efficient management of capacity in the water distribution system More efficient plant process More efficient plant process

13. Current Situation and Future Plans Process control system standards study –Feb 2000 Process control system standards study –Feb 2000 Completed RFP and selected new SCADA vendor - Feb 2002 Completed RFP and selected new SCADA vendor - Feb 2002 First two systems completed First two systems completed Standardized deployment of new system Standardized deployment of new system Three more are planned for conversion over the next 18 months Three more are planned for conversion over the next 18 months Remainder to be completed by 2007 Remainder to be completed by 2007

14. Current Situation and Future Plans- continued Process control network project initiated – Oct 2003 Process control network project initiated – Oct 2003 24 X 7 network that is secured and dedicated for process control environment 24 X 7 network that is secured and dedicated for process control environment Redundant communication to critical sites Redundant communication to critical sites Support security systems ( Intrusion detection, card access and video surveillance ) Support security systems ( Intrusion detection, card access and video surveillance ) Securely support in-plant WLAN Securely support in-plant WLAN

15. Distribution SCADA Current Communications

16. New Standard Configuration

17. PCN

18. WLAN Conceptual Design

19. Other Improvement Initiative Initiated Process Control Optimization Study Initiated Process Control Optimization Study Identify new technology to improve process and/or reduce operational costs Identify new technology to improve process and/or reduce operational costs Analyze current technology in use Analyze current technology in use Analyze overall system performance Analyze overall system performance