1. The Effects of High Capacity Vacuum Induction Sodium Hypochlorite Feed on Chloramine Development SureWater Technologies, Inc. Winter Garden, Florida

2. SureWater Tech: WAHC 09- 20052 Peter Alexander Robert T. Burrows Wolfram Hartwig Presented by Wolfram Hartwig World Aquatic Health Conference City of Industry, CA September 2005

3. SureWater Tech: WAHC 09- 20053 Process Schematic

4. SureWater Tech: WAHC 09- 20054 Advantages (1)  Providing superior, immediate mixing of the hypochlorous acid (from NaOCl)  Vacuum induction using a venturi  No accidental chlorine injection while filtration pump is off (siphoning)  Immediate destruction of chloramines  Maintaining continuous breakpoint chlorination

5. SureWater Tech: WAHC 09- 20055 Advantages (2)  High feed capability, up to 1700 gpd  Breakpoint chlorination requirement eliminated  Chloramine levels lowered significantly  Simple rate adjustment by flow control (vs. stroke and speed in metering pumps)  Significant (up to 40 %) savings in chlorine consumption  Improved water and air quality

6. SureWater Tech: WAHC 09- 20056 Advantages (3)  Safe operation – vacuum, not pressure injection  No priming required  No parts replacement/labor associated with metering pumps  Virtually maintenance free – outstanding durability (rated at 1 million cycles)  NSF – 50 / ANSI certified

7. SureWater Tech: WAHC 09- 20057 Measurements  Measurements at two sites: Montgomery Aquatic Center, MD Montgomery Aquatic Center, MD Prince Georges Community College, MD Prince Georges Community College, MD  2004 data prior to installation  2005 data post installation  2005 measurements: 3 months at PGCC (2 months w. venturi) 3 months at PGCC (2 months w. venturi) 4 months at MAC (3 months w. venturi) 4 months at MAC (3 months w. venturi)  Measurements taken during peak usage

8. SureWater Tech: WAHC 09- 20058 2004 Data, PGCC  Free chlorine and pH measured daily  Combined chlorine measured twice/week  Breakpoint chlorination required on average every 2 – 3 weeks  Average combined chlorine over 4 months period: 0.72 mg/L (ppm)

9. SureWater Tech: WAHC 09- 20059 2004 PGCC Graph for FC/CC

10. SureWater Tech: WAHC 09- 200510 2004 PGCC Graph for FC/CC

11. SureWater Tech: WAHC 09- 200511 2005 Data, PGCC  3 daily measurements of chlorine, pH and combined chlorine  No breakpoint chlorination required  Average daily combined chlorine during measurement period: am: 0.24 noon: 0.28 pm: 0.34 mg/L (ppm) am: 0.24 noon: 0.28 pm: 0.34 mg/L (ppm)  Overall daily average: 0.29 mg/L (ppm)  [2004 average: 0.72 mg/L]

12. SureWater Tech: WAHC 09- 200512 PGCC 2005: FC 3x/d

13. SureWater Tech: WAHC 09- 200513 PGCC 2005: FC 3x/d

14. SureWater Tech: WAHC 09- 200514 PGCC 2005: CC 3x/d

15. SureWater Tech: WAHC 09- 200515 PGCC 2005: CC 3x/d

16. SureWater Tech: WAHC 09- 200516 Montgomery Aquatic Center  MAC data similar to the PGCC data for 2004 and 2005  2004: Breakpoint chlorination every 2 weeks  2005: No breakpoint chlorination required

17. SureWater Tech: WAHC 09- 200517 Henderson, NV

18. SureWater Tech: WAHC 09- 200518 Orlando, FL

19. SureWater Tech: WAHC 09- 200519 Ft. Pierce, FL

20. SureWater Tech: WAHC 09- 200520 Largo, MD

21. SureWater Tech: WAHC 09- 200521 Bethesda, MD

22. SureWater Tech: WAHC 09- 200522 Conclusion  The measurements show a distinct reduction in combined chlorine levels  The need for breakpoint chlorination has been eliminated  The absence of injection/metering pumps (diaphragm or peristaltic) lowers maintenance requirements and costs

23. SureWater Tech: WAHC 09- 200523 Acknowledgements SureWater Technologies wishes to express gratitude and appreciation to Joan Shea and the staff of the Prince Georges Community College and to Doug Fox and the staff of the Montgomery Aquatics Center for their cooperation and diligent work. Special thanks to Charles Harper and his staff for their support. Peter Alexander Robert Burrows Wolfram Hartwig