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G. WELL SCREENS <br /> 1. The well, if constructed to obtain water from an unconsolidated rock <br /> formation, shall be equipped with a screen that will prevent the entrance of <br /> formation material into the well after the well has been developed and <br /> completed. <br /> 2. The well screen shall be of a standard design with certification to Standard <br /> ANSINNSF 61 and pre-manufactured to permit the optimum development of <br /> the aquifer with minimum head loss consistent with the intended use of the <br /> well. The openings shall be designed to prevent clogging and shall be free of <br /> rough edges, irregularities or other defects that may accelerate or contribute to <br /> corrosion or clogging. <br /> 3. Multi-screen wells shall not connect aquifers or zones which have differences <br /> in water quality which would result in contamination of any aquifer or zone. <br /> History Note: Substitute for NCAC 02C.0107 <br /> Eff. July 1, 2008; amended eff. March 25, 2020 <br /> H. GRAVEL/SAND PACKED WELLS - Gravel or sand packed wells shall be <br /> constructed with prior approval from the OCHD and in accordance with NCAC 02C. <br /> History Note: Substitute for NCAC 02C.0107 <br /> Eff. July 1, 2008. <br /> I. WELL DEVELOPMENT <br /> 1. All water supply wells shall be developed by the well contractor; <br /> Development shall include removal of formation materials, mud, drilling <br /> fluids and additives such that the water contains no more than: <br /> a. Five milligrams per liter of settleable solids; and <br /> b. 10 NTUs of turbidity as suspended solids. <br /> 2. Development shall not require efforts to reduce or eliminate the presence of <br /> dissolved constituents, which are indigenous to the ground water quality in <br /> that area. <br /> History Note: Substitute for NCAC 02C.0107 <br /> Eff. July 1, 2008; amended eff. October 23, 2009 <br /> J. WELLHEAD COMPLETION <br /> 1. Every water supply well and such other wells as may be specified by the <br /> OCHD shall be equipped with a usable access port or air line. The access port <br /> shall be at least one half inch inside diameter opening so that the position of <br /> the water level can be determined at any time. The port shall be installed and <br /> maintained in such manner as to prevent entrance of water or foreign material. <br /> 2. The surface of the ground shall be graded away from the well-head in all <br /> 25 <br />