Orange County NC Website
25 <br /> 1 In this region, where crystalline rock is the norm, C.J. Corvette explained that air rotary <br /> 2 drilling is used. He said it is like an upside-down ballpoint pen with a hammer that pounds while <br /> 3 rotating, using air to lift rock cuttings out. This is different from mud rotary used in coastal areas. <br /> 4 <br /> 5 Chart#1: <br /> f <br /> 10 <br /> was <br /> V <br /> Nq � <br /> A <br /> 6 <br /> 7 C.J. Corvette used the illustration in chart #1 to show that casings function as straws, <br /> 8 getting past soils to access beneath the crystalline rock, with grout surrounding it to prevent <br /> 9 contamination. Well videos verify construction quality, with every community well videoed to <br /> 10 ensure standards are met. <br /> 11 <br /> 12 <br /> 13 <br /> 14 <br /> 15 <br /> 16 <br /> 17 <br /> 18 <br /> 19 <br /> 20 <br /> 21 <br /> 22 <br />