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28 <br /> C.J. Corvette said the standard is for a well to have a standard daily use of 12 hours. He <br /> said, generally, there is a lot of water use in the morning and evening, but less throughout the day. <br /> However, wells are tested for 24 hours to strain or stress them. <br /> Commissioner Carter asked the hours of constant use could be decreased if there were a <br /> containment system where water could be stored. <br /> C.J. Corvette said yes, storage tanks can help manage drawdown. He said there are <br /> storage requirements for public water supply to ensure demand can be met if it exceeds the output <br /> of the wells. <br /> Slide #18 <br /> Public Supply Well Testing <br /> • Water quality samples for y <br /> contaminants '3'f.303:9" <br /> • Collected during drawdown testing <br /> • Advises on filtration requirements <br /> • Significantly larger sample spread <br /> than private wells <br /> P <br /> ARMS <br /> C.J. Corvette emphasized that iron and manganese are common in Piedmont wells. <br /> �}� <br /> Community wells tests look for significantly more constituents than private wells, including PFAS <br /> compounds, radiologicals, and various organic and inorganic chemicals. <br /> Commissioner Carter asked about testing stringency for private wells in Orange County. <br /> Commissioner Fowler said she thinks Orange County only requires coliform testing. <br /> Tony Whitaker said that is correct. <br /> C.J. Corvette noted the cost difference, mentioning PFAS testing requires expensive mass <br /> spectrometry which is unavailable to most homeowners. <br />