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Search results with tag "Total chlorine"
free chlorine presentation.ppt
cdn.ymaws.comWhat is a free residual? Chlorine in ‘pure’ H 2O = HOCl + OCl-HOCl = Hypochlorous Acid OCl-= Hypochlorite Ion Free chlorine residual = HOCl / OCl-Free ‘available’ chlorine is very reactive Total Chlorine – Free = Combined Minimum system chlorine residuals: IL EPA: 0.2 free / 0.5 mg/L total IA DNR: 0.3 mg/L free / 1.5 mg/L total
Legionella Sampling Procedure and Potential Sampling Sites
www.cdc.govChlorine test kit sensitive enough to detect chlorine level below 2 ppm and up to 10 ppm (may need two kits). Free chlorine may be measured when it is known that chlorine is the method of disinfection (as opposed to monochloramine, bromine, or another disinfectant). Otherwise, measure total chlorine. Thermometer. Sample data sheet and pens.