Example problem: Following filtration, water in serpentine chlorination basin is dosed with 6 mg/L of free chlorine at Cly. Tracer tests show the following characteristic hydraulic residence times for the basin, piping, and storage tank. Once in the storage tank, free chlorine is converted to monochloramine to increase stability of the residual disinfectant. Estimate the expected removal of Giardia Lamblia cysts in water coming out of the tap from the first customer. Water has pH 9.0 and 10 *C. Use Table 11.8 in your handouts. 6 mg/L Free chlorine converted to monochloramine in storage tank to = 30 min 1 mg/L to = 240 min 10 = 60 min 2 mg/L 10 = 2000 min 0.25 mg/L 0.5 mg/L