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Geothermal Rules <br />Effective Date: September 30, 2004 <br />8.4.2 A Type A-CLH well with loops designed for submergence in a body of <br />water shall be equipped and tested in accordance with Rules 8.5 and 8.6. The certified <br />individual shall take all necessary precautions to prevent leakage or spillage of the <br />circulating fluid into the surface water reservoir that may adversely affect human health <br />or the environment, and shall be equipped to contain any such leak or spill that may <br />occur. <br />8.5 Type A-CLV Well Construction (vertical closed -loop) - The well shall be <br />constructed in such a manner as to confine underground fluids in the aquifers in which <br />they are encountered and to prevent contamination of surface or ground water <br />resources. Installation shall be in accordance with manufacturer and designer <br />specifications and must be performed by or under the supervision of a certified <br />individual. A Type A-CLV well need not be constructed by or under the supervision of a <br />water well construction contractor licensed by the State Board of Examiners of Water <br />Well Construction and Pump Installation Contractors. <br />8.5.1 Boreholes drilled for a Type A-CLV well shall be of sufficient diameter so <br />that there is not less than one (1) inch of space between the tubing or piping installed <br />and the borehole wall to ensure proper grouting and sealing. <br />8.5.2 Boreholes for a Type A-CLV well shall be entirely filled with only <br />approved grout materials. Grout shall be placed as a slurry through a tremie pipe and <br />shall be placed in one continuous operation from the bottom of the hole upward. All <br />grout shall be pumped and shall not be poured from the surface. Drilling fluids, drill <br />cuttings or shale slurries are not grout materials and shall not be used to backfill <br />boreholes constructed for a Type A-CLV well. <br />8.5.3 Grout shall be placed as soon as possible after installation of the pipe or <br />tubing loop to prevent collapse of the borehole and the potential for an incomplete grout <br />seal. Should such collapse occur, the pipe or tubing shall be removed, the borehole <br />cleaned or re -drilled, and the pipe or tubing inspected and re -tested prior to installation. <br />All reasonable attempts shall be made to remove the pipe from damaged boreholes. If <br />the remaining pipe cannot be removed without damage to the bulk of the pipe in place, <br />the loop and borehole shall be plugged pursuant to Rule 11.5. <br />8.5.4 In boreholes that penetrate a confining layer or layers, a minimum of <br />forty (40) feet of cement grout shall be placed opposite each confining layer between <br />ground water aquifers encountered in each borehole. <br />8.6 Testing of a Type A-CLH or Type A-CLV Well - All pipe/tubing, connections, <br />joints and fittings which will be installed underground or submerged in water shall be <br />tested at the designed working pressure prior to installation and visually inspected for <br />leaks. Once installed, the underground or submerged portion of the closed loop shall <br />be pressure tested at one hundred and fifty (150) percent of the designed working <br />21 <br />