Water Treatment Operator D License 100% Correct!!

Well casing - provides connection to groundwater and pathway for bringing water to the surface. Prevents aquifer contamination. hydrogen sulfide - dissolved gas that causes taste and odor Sodium Hypochlorite (HTH) - Liquid bleach that has shelf life of 60 to 90 days Hypochlorinator - diaphragm pump (similar to one used to feed fluoride) that dispenses chlorine solution made from hypochlorites into water being treated Gas chlorine - greenish-yellow, 2.5 times heavier than air Fluoridation - MCL 4 mg/L and secondary standard of 2 mg/L Fluoride compounds - hydrofluosilicic (most common), sodium fluoride, and sodium silicofluoride Cause of Corrosion - Low pH = more corrosive, low or no chlorine (pH to drop) Treating Corrosion - raise pH, flushing, phosphate or silicate addition Hydrant drains - shall not be closer than 10 feet to a sewer Watermains - 10 feet horizontally from proposed sewer. 18 inches above top of sewer. Water mains crossing sewers separated by minimum vertical distance of 18 inches. Water mains must be atleast 10 feet from sanitary sewer forcemain. Cross Connection - connection of non potable water source and a potable water source water hammer - occurs when moving water suddenly stops (closing valve too fast) Your license renews - Before June 30 in even number years Purpose of stabilization - prevent corrosion or excessive scale from entering the distribution system BARF - Bacteriological Analysis Report Forms