Water is the most important natural resource in our environment. We depend on it daily for a variety of important activities. If water was a pure substance it could be used without concern, but water is far from pure. It contains microorganisms and dissolved minerals. Both of these constituents need to be controlled before water can be used safely. This presentation highlights a new easier way to field test Chlorine.

1. New Methodology for Poolside Compliance Testing By Ivars Jaunakais World Aquatic Health Conference Friday, October 17, 2008 - 2:30 pm www.sensafe.com / ivars@sensafe.com

5. Germ inactivation time in 1 ppm chlorinated water About 9600 minutes (6.7 days) Cryptosporidium Parasite About 45 minutes Giardia Parasite About 16 minutes Hepatitis A Virus Less than 1 minute E. Coli O157:H7 Bacterium INACTIVATION TIME GERM

6. Some sources of Chlorine ~12% Liquid NaOCl Sodium Hypochlorite 65-70% Solid Ca(OCl) 2 Calcium Hypochlorite 100% Gas Cl 2 Chlorine Gas % Chlorine Form Chemical Formula Chemical Name

10. pH versus chlorine species Graph 1

29. Chlorine Test Specifications 0.1 0.0 – 11.0 Program 12 0.01 0.00 – 2.20 Program 9 DR890 0.01 0.1 0.00 – 2.39 2.4 – 10.8 CL1 Micro 7+ RESOLUTION RANGE (PPM) MENU METER

30. Graph 2 Regression equation with correlation coefficient (R 2 )

31. Micro 7+ Specifications Any Questions? 0.01 0.01 9.99-0.01 %T 0.1 or 4% 0.1 2.0-8.0 ppm 0.1, or 4% 0.1 3.0-14.0 ppm 0.1, or 4% 0.1 2.4-10.8 ppm For Cyanuric Acid, Nitrate and other tests 0.0 200 – 400 ppm 80 – 140 ppm For spas 3.0 – 6.0 ppm 7.4 – 7.6 1.0 to 3.0 ppm (combined less than 0.2 ppm) Ideal Levels 0.1 0.1 99.9-10.0 %T Transmission TR7 0.02 0.01 0.00-1.99 ppm Copper (Cu +2 ) CU6 20 or 7% 10 20-990 ppm Calcium as CaCO 3 CA5 25 5 20-240 ppm Total Alkalinity AL4 0.03 0.01 0.00-2.99 ppm Bromine (DPD-1) BR3 0.3 0.1 6.1-8.4 pH pH PH2 0.02 0.01 0.00-2.39 ppm Free Chlorine (DPD-1) Total Chlorine (DPD-3) CL1 Accuracy Resolution Range Tests for Menu