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Definitions <br />Acid or toxic producing materials - natural or reworked earth materials having acid or toxic <br />chemical and physical characteristics. <br />Designated Mining Operation - a mining operation at which: I) toxic or acidic chemicals used in <br />extractive metallurgical processing are present on site; II) acid- or toxic-forming materials will <br />be exposed or disturbed as a result of mining operations; or III) uranium is developed or <br />extracted... (Title 34-32-112.5) (32-103 3.5) <br />101 Page