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b) Measure and record the static water level prior to starting the air compressor; <br /> c) Measure and record the discharge rate at intervals of 10 minutes or less; <br /> d) Measure and record the pumping level using a steel or electric tape at <br /> intervals of 10 minutes or less,and; <br /> e)Continue the test for a period of at least one hour. <br /> History Note: Substitute for NCAC 02C.0110 <br /> Eff. July 1, 2008;amended eff. October 23, 2009 <br /> Q. DISINFECTION OF WATER SUPPLY WELLS <br /> 1.Any person constructing, repairing,testing, or performing maintenance, or installing a <br /> pump in a water supply well shall disinfect the well upon completion of construction, <br /> repairs,testing, maintenance,or pump installation. <br /> 2.Any person disinfecting a well shall perform disinfection in accordance with the <br /> following procedures: <br /> a)Chlorination) Comment[VH68]:OCHD REQUIREMENTTO USE <br /> A RY,GRANULAR CHLORINE ONLY TO ENSURE THAT <br /> (1)Granular calcium hypochlorite shall be placed in the well in sufficient ALL WELL CONTRACTORS USE THE PROPER <br /> CONCENTRATION OF DISINFECTION AS A DRY <br /> quantities to produce a chlorine residual of at least 100 parts per million MEASURE(MASS) <br /> (ppm)in the well. Stabilized chlorine tablets or hypochlorite products <br /> containing fungicides, algaecides, or other disinfectants shall not be used. <br /> Chlorine test strips or other quantitative test methods shall be used to <br /> confirm the concentration of the chlorine residual. <br /> (2) The disinfection of well water with calcium hypochlorite requires the <br /> water pH stabilized to less than 7.0.before the application. Use pH <br /> lowering and disinfection products in the manner that the manufacturer <br /> intends. <br /> b)The granular calcium hypochlorite shall be applied to the well through the top <br /> of the well and allowed to settle to the bottom. <br /> c)The water shall be recirculated to: <br /> (1) Distribute the chlorine throughout the water column of the well, and; <br /> (2)Wash down the well casing, pump column and any other equipment <br /> above the water level in the well. <br /> 3.The chlorine solution shall stand in the well for a period of at least 24 hours. <br /> 4.The well shall be pumped until the system is clear of the chlorine before the system is <br /> placed in use. <br /> 5. Other materials and methods of disinfection may be used upon prior approval by the <br /> 32 <br />