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.Introducing specifically-formulated chemicals into a well; and, <br />.Combinations of the above. <br />Hydraulic fracturing (hydrofracturing) is sometimes an acceptable well development and redevelopment <br />method when properly performed. Good quality water shall be used in hydrofracturing. The water shall be <br />disinfected prior to introduction into a well. Material used as 'propping' agents shall be free of pollutants and <br />contaminants, shall be compatible with the use of a well, and shall be thoroughly washed and disinfected prior <br />to placement in a well. <br />Development, redevelopment, or reconditioning by use of specially designed explosive charges is in some cases, <br />another acceptable development method. Explosives shall be used with special care to prevent damage to the <br />well structure and to any natural barriers to the movement of poor-quality water, pollutants, and contaminants. <br />Explosives shall only be used by properly-trained personnel. <br />Wells subjected to chemicals or explosives during development, redevelopment, or reconditioning operations <br />shall be thoroughly pumped to remove such agents and residues immediately after the completion of <br />operations. Chemicals, water, and other wastes removed from the well shall be disposed of in accordance with <br />applicable local, State, and federal requirements. The enforcing agency should be contacted regarding the <br />proper disposal of waste." <br />~~~~~ <br />-27-