The Water District utilizes Sodium Hypochlorite (NaClO) and Ferric Chloride (FeCL3) in a multi-step arsenic removal process. Injection of these chemicals into the raw groundwater transforms the arsenic molecules into a precipitate which can then be filtered out of the water.
Originally, the Well Stations utilized Solenoid Style pumps but discovered that the off-gassing nature of liquid NaClO caused these pumps to vapor lock, which interrupted the chemical feed process until they were serviced.
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